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EngineEngine Model Caterpillar® 3176C with ATAACFlywheel Power 184 kW 246 hpMax. Flywheel Power 194 kW 260 hp

WeightsOperating Weight 22 870 kg 50,400 lb

BucketsBucket Capacities 3.5-4.25 m3 (4.5-5.5 yd3)

966GSeries IIWheel Loader

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966G Series II Wheel LoaderSetting the standard for wheel loader productivity, durability, and operator comfort.

Performance and comfort you can feel,delivering strong breakout force, fastcycle times, and smooth shifts foroptimal performance and comfort.

Environmental Features

The 966G Series II is designed andbuilt with the environment in mindwith features including the new3176C electronic engine, electronicallycontrolled on-demand fan, ecologydrains, environmental fluids, andrecyclable and remanufacturablecomponents. pg. 14

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Versatility and Application Match

Choose from a wide variety of Caterpillarbuckets, ground engaging tools, worktools, and special arrangements to matchyour application. pg. 12

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Cooling System

The G Series II cooling package reducesradiator plugging and contributes toincreased fuel efficiency. The newcooling package traps less airbornedebris and is more accessible forcleaning. pg. 6

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Electronic Transmission

Planetary power shift transmissionwith automatic shift capability provideson-the-go speed and direction changes.The Electronic Clutch Pressure Control(ECPC) delivers smoother shifts.Variable Shift Control matches shiftpatterns to the application. pg. 5

Engine

Cat® 3176C ATAAC diesel engineis built for performance, durability,excellent fuel economy, low soundlevels, and meets all world-wideemission regulations through 2005.pg. 4

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✔ New Feature

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Serviceability

The 966G Series II leads the pack inserviceability with extended serviceintervals; ground-level access to allmajor service points; sight gauges forfluid level checks of engine coolant,hydraulic oil, and transmission oil;convenient system access; andperformance feedback via theCaterpillar Monitoring System.pg. 16

Complete Customer Support

In addition to machine selection, Catdealers offer a wide range of services,from purchase options to operatortraining, maintenance programs andparts support. pg. 15

Operator Station: Command Control Steering

Command control steering with electro-hydraulic controls featuresa semicircular steering wheel withintegrated transmission controls.The cab is ergonomically designedand sets the industry standard foroperator comfort and efficiency.pg. 10

Operator Station: Conventional Steering Wheel

Conventional steering wheel with pilothydraulic controls is one of two operatorstation options. The 966G Series II cabis ergonomically designed and sets theindustry standard for operator comfortand efficiency. pg. 8

Axles

Caterpillar designed and built withproven durability, the heavy-duty, four-piece axle design continues withthe G Series providing maximumperformance and serviceability. pg. 7

Powerful Performance. The 3176C highperformance electronically controlleddiesel engine - with six-cylinder, directinjection, turbo-charged, air-to-air after-cooled (ATAAC), and 4-valves percylinder - delivers net power of 184 kW(246 hp) and enables the 966G II toperform in the most demanding ofapplications. The 3176C is the ultimatecombination of Caterpillar diesel andelectronic component technologyincluding ADEM™ III, CaterpillarMonitoring System, and ATAACresulting in unmatched productivityand efficiency.

Advanced Fuel System. The 966G IIfeatures a Caterpillar exclusiveAdvanced Diesel Engine Module(ADEM III) fuel system controller.ADEM III controls all major enginefunctions, regulates the timing,duration, and pressure of the fuelinjection, providing this informationto the Caterpillar Monitoring System.

Caterpillar Monitoring System (CMS).CMS monitors six major engine systemfunctions and derates the engine shouldany critical conditions occur. Timelyinformation allows operators to bettermanage machine operation and takenecessary corrective actions, lesseningthe risk of potential machine damage.

Turbocharged and ATAAC. Turbo-charging packs dense air into thecylinders for more complete combustionand lower emissions. Air-to-air after-cooler (ATAAC) reduces smoke andemissions by providing cooler inletair for more efficient combustion.The result is high output and efficiencywhile meeting EPA Tier 2 emissionscompliance.

Constant Net Horsepower. The 3176Celectronic engine continuously gathersinformation to control the on-demandfan speed and provide constant nethorsepower regardless of operatingconditions. Compensating for varyingfan loads enables the machine tomaintain normal system temperaturesand reduce fuel consumption.

Less Maintenance. With the 3176C, theengine oil change interval is increasedfrom 250 to 500 hours with the useof CH-4 oil, after an initial 250 houroil change, to provide reduced costsand downtime.

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EngineThe 966G Series II engine is built for power and reliability to deliver excellent productivityand cost effective operation.

Electronic Power Shift Transmission.The planetary power shift transmissionwith automatic shift capability is designedand built by Caterpillar. The planetarydesign results in more gear tooth contactfor transmitting loads and durability.This robust transmission allows fullpower, speed, and directional changes.

Electronic Clutch Pressure Control(ECPC). Input from both the transmissionand the operator controls in the cabmodulate each individual clutch througha proportional electro-hydraulic valve.Six proportional electro-hydraulicvalves pressurizing the clutches areidentical and are bolted on top of thetransmission. This results in smootherspeed and directional shifts. Energy ismodulated in the clutches, resulting inlonger component life.

Integrated Braking System (IBS).The Caterpillar exclusive IBS integratesdownshifting and neutralizer logic intothe left-hand brake pedal. IBS increasesperformance and productivity with anoptimized transmission neutralizer andautomatic downshifting. IBS also lowersowning and operating costs by reducingaxle oil temperatures to extend brake life.

Free Wheel Stator Torque Converter(FWSTC). FWSTC reduces drags in thetorque converter at high turbine speed/impeller speed ratios. This improvesmachine power train efficiency andcontributes to improved fuel economyin certain applications.

Variable Shift Control (VSC). VSCtransmission software allows theoperator to select three different shiftpatterns based on the application andoperating preferences. This featurereduces fuel consumption in certainapplications. In all modes, fullmachine power remains availablefor production loading.

Easy Service. Daily oil level check isdone from the ground through a well-protected sight gauge. An oil samplingvalve allows quick, clean access to thetransmission for S•O•SSM oil analysis.

Ecology Drain. A transmission oil ecologydrain is standard and allows oil to bedrained without spillage.

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Electronic TransmissionAdvanced Caterpillar power train is reliable and fuel efficient.

Reversed Airflow, Unit Core Radiator.The airflow is reversed on the 966G IIand enters through the rear grill, exitsout the top and side hood panels.Reversed air flow means less debrisentering the system. In addition, a newunit core radiator with square waveshaped fins and lower fin density (6 finsper inch) allows debris to pass throughmore easily.

Electronically Controlled On-DemandFan. Electronically controlled,temperature sensing variable speed on-demand fan adjusts to meet thevarying cooling requirements of themachine throughout the work cycle.Hydraulic oil, engine coolant, and inletmanifold temperatures determine fanspeed. In cooler operating conditions,average fan speed is reduced, resultingin less fuel consumption and lowernoise levels. Lower air flow alsoreduces cooler core plugging inhigh airborne debris applications.

Convenient System Access. The 966G IIoffers both a swing-out grill and swing-outhydraulic oil cooler and air conditionercondenser for fast and easy cleaning.Left and right side panels also allowaccess to cores for cleaning.

Airborne Debris Grill (Optional).An optional attachment, the airbornedebris grill replaces the standard reargrill with one that has a verticallycorrugated steel screen with 4 mm(0.16") perforations to restrict theentry of airborne debris. The grill ishinged to allow access to cooler coresfor cleaning, and also includes bracketsto seal around the fuel tank and screenmaterial between the bottom of the grilland the counterweight.

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Cooling System The 966G Series II cooling package provides reduced radiator plugging, fuel efficiency, andeasy maintenance.

Heavy-Duty, Four-Piece Axle Design.Caterpillar designed and built withproven durability, the 966G four-piece axle design is maintained for the966G Series II. Designed to last in alloperating conditions, each axle containstwo axle shaft housings, the centerhousing, and the intermediate housing.The front axle is fixed, and the rearaxle oscillates ±13 degrees.

Fully Hydraulic Service Brake.Inboard brakes are positioned next tothe differential operating on the lowtorque side of the final drive. Fourfriction discs, two each side, are fullyenclosed within each axle to lock outcontaminants. Multiple oil-disc brakesare adjustment free, and bathed in axleoil for excellent cooling. Independentfront and rear brake circuits use separate,heavy-duty piston-type accumulators toensure dead engine braking.

Integrated Axle Diagnostics.

1. Brake wear indicators (2 per axle)provide easy access to measure brakedisc wear without disassembling theaxle. The original brake reading isrecorded in the machine controls atthe factory to allow precise wearcalculations.

2. Axle oil temperature sensors inboth front and rear axles alertthe operator on the CaterpillarMonitoring System panel ofincreased axle oil temperatures toallow the operator to modify theoperating technique. This ensuresoptimum axle operating conditionsfor maximum component life.

Solutions For Extreme Applications.The left-hand pedal serves as eitheran additional brake or, when activated,engages Caterpillar’s exclusive IntegratedBraking System (IBS). IBS reduces axleoil temperatures to provide maximumaxle component life. Although IBSreduces the need for axle oil coolersin many cases, an internal axle oilcooler is available as a factoryinstalled attachment.

Limited Slip Differentials (Optional).Available for front and/or rear axles,limited slip differentials delivermaximum traction on uneven groundand in changing traction conditionssuch as mud, water, snow, and ice.

Axle Oil Ecology Drains (Optional).Axle oil ecology drains provide easierdrainage with fewer spills.

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AxlesHeavy-duty axles protect internal components from the environment and offer excellentserviceability.

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Conventional Steering Wheel (SW) with Pilot Hydraulic Bucket Controls

The 966G II cab offers unmatched operator comfort and efficiency with steering and controloptions to fit every operator and application.

Operator Station: Conventional Steering Wheel

1 Conventional Steering Wheel (SW).With a standard hand-grip feature, theSW configuration offers a low efforthand metering unit hydraulic steeringsystem. Load sensing steering directspower through the steering system onlywhen needed. When not steering, moreengine power is available to generaterimpull, breakout force, lift force, andresults in reduced fuel consumption.The steering column tilts for maximumoperator comfort.

2 Shift Lever. SW machines are equippedwith a lever on the left side of thesteering column for directional andspeed selection.

3 Pilot Hydraulic Bucket Controls.Pilot-assisted, hydraulic bucket controlsmake low-effort operation possible.Individual lift and tilt levers are standardas shown. One lift and one return-to-digposition may be adjusted on the linkage.A downshift switch is located on thelift lever for use in bucket loading.A single lever joystick is available asan attachment. Forward/Neutral/Reverse(F-N-R) switch on the lift lever isavailable as an attachment on eitherlever arrangement.

4 Standard Air Conditioning andImproved Ventilation. Air conditioning,heating, and defrosting functions arestandard and airflow is improvedutilizing thirteen louvered vents and alarger re-circulation filter. This ensuresbetter air quality for the operator. Allcontrols are located on the upper controlpanel within easy reach of the operator.

5 Dual-Pedal Braking. The left-handpedal serves as either an additionalbrake or, when activated, engages theCaterpillar exclusive Integrated BrakingSystem (IBS). IBS integrates bothdownshifting, transmission neutralizerlogic, and braking into the left-handpedal. Using the neutralizer maintainshigh engine RPM for full hydraulic flow.

6 Seat Options. The KAB cloth,mechanical suspension seat is standardon the SW machine. Caterpillar Comfortcloth air suspension seat is available asan attachment.

7 Entry/Exit With Standard SlidingWindows. Rear-hinged, full-lengthdoors with left side ground levelaccess and standard sliding windows.

8 Visibility. A wider, flat front anddistortion-free windshield featuresbonded glass to reduce obstructions andprovide an accurate and full view of theentire working area. Windshield wipersweep is increased and wet-arm, front andback wiper washers ensure a clear viewis maintained. A larger roof improveswater run-off, and a stylish slopinghood provides excellent rear visibility.

9 Generous Storage. Largercompartments for lunchbox, cooler,cups, and storage.

10 Caterpillar Monitoring System(CMS). CMS monitors critical machinesystems and provides four warningcategories to keep the operator informed.CMS is conveniently located on theupper control module. LED indicatorseliminate the need for bulb replacement.

11 Electronic Autoshift Control. Theoperator can choose manual or automatictransmission shifting. Pilot controlsallow two automatic shift positions.

12 Variable Shift Control (VSC). VSCis a standard system that allows theoperator to select 3 different shiftingpatterns to best match the applicationrequirements and provide fuel efficiency,smoother shifts, and reduced soundlevels. VSC rotary switch is locatedon the upper right control panel.

13 Transmission Neutralizer OverrideSwitch. A rocker switch activates theoverride so the left pedal will notneutralize (or disengage) the transmission,but will function only as a service brake.Upon engine start-up, the neutralizerwill default to the active position.

14 Ride Control System (Optional).Ride control provides a smoother,more comfortable ride, and contributesto increased frame and machine life byreducing shock loads on the structures.

15 Payload Control System (PCS;Optional). PCS allows on-the-goweighing of the bucket payloadduring the lift cycle.

Radio-Ready. Includes standard 12V(10 amp) converter, speakers, antenna,wiring and brackets for an entertainmentradio. Entertainment radio is availableas a factory installed attachment. A CBradio-ready option is also available asan attachment and includes all wiringand hardware plus a 20-amp 24V to12V converter.

Floor Mat. Enhanced with contoursto allow for easier cleaning.

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Command Control Steering with Electro-Hydraulic Bucket Controls

The 966G II cab offers unmatched operator comfort and efficiency with steering and controloptions to fit every operator and application.

Operator Station: Command Control Steering

1 Command Control Steering (CC).A pilot operated, load-sensing system,CC links the steering wheel and frameangle positions to provide the properamount of steering control with minimaloperator effort. The speed the machineturns is proportional to the steering wheelposition. Steering stops are hydraulicallycushioned. Benefits of this system areprecise control, quick response, andreduced operator fatigue. The uniquesemicircular steering wheel shapeprovides improved visibility to thefront dash and gauges. The steeringcolumn tilts and telescopes to adjustfor maximum operator comfort.

2 Ergonomic Transmission Controls.CC transmission controls areergonomically integrated onto thesteering grip to allow one hand steeringand shifting. Controls include a three-position rocker switch to select forward,neutral, or reverse and a thumb operatedup-shift and downshift button foroptional manual shift mode.

3 Standard Air Suspension Seat.Caterpillar Comfort cloth, airsuspension seat with six adjustmentsand lumbar support is standard on theCC configuration.

4 Electro-Hydraulic (E/H) BucketControls. E/H offers “finger-tip”movement lift and tilt bucket controlswith outstanding sensitivity and control.Automatic lift and tilt kick-outs areadjustable from inside the cab and arehydraulically cushioned for greateroperator comfort and less materialspillage. Enhancements to this systemwith the 966G II include “bucketdump rate control” for smooth flowof material from the bucket and “finemodulation control” to provide precisecontrol for delicate bucket or worktool operations.

5 Standard Air Conditioning andImproved Ventilation. Air conditioning,heating, defrosting functions arestandard and airflow is improvedutilizing thirteen louvered vents and alarger re-circulation filter. This ensuresbetter air quality for the operator. Allcontrols are located on the upper controlpanel within easy reach of the operator.

6 Dual-Pedal Braking. The left-handpedal serves as either an additionalbrake or, when activated, engages theCaterpillar exclusive Integrated BrakingSystem (IBS). IBS integrates bothdownshifting, transmission neutralizerlogic, and braking into the left-handpedal. Using the neutralizer maintainshigh engine RPM for full hydraulic flow.

7 Entry/Exit With Standard SlidingWindows. Rear-hinged, full-lengthdoors with left side ground levelaccess and standard sliding windows.

8 Visibility. A wider, flat front anddistortion-free windshield featuresbonded glass to reduce obstructions andprovide an accurate and full view of theentire working area. Windshield wipersweep is increased and wet-arm, front andback wiper washers ensure a clear viewis maintained. A larger roof improveswater run-off, and a stylish slopinghood provides excellent rear visibility.

9 Generous Storage Area. Largercompartments for lunchbox, cooler,cups, and storage.

10 Caterpillar Monitoring System(CMS). CMS monitors critical machinesystems and provides four warningcategories to keep the operator informed.CMS is conveniently located on theupper control module. LED indicatorseliminate the need for bulb replacement.

11 Electronic Autoshift Control.The operator can choose manualor automatic transmission shifting.E/H controls allow four automaticshift positions.

12 Variable Shift Control (VSC). VSCis a system that allows the operator toselect 3 different shifting patterns tobest match the application requirementsand provide fuel efficiency, smoothershifts, and reduced sound levels. VSCrotary switch is located on the upperright control panel.

13 Transmission Neutralizer OverrideSwitch. A rocker switch activatesthe override so the left pedal willnot neutralize (or disengage) thetransmission, but will function only asa service brake. Upon engine start-up,the neutralizer will default to theactive position.

14 Ride Control System (Optional).Ride control provides a smoother,more comfortable ride, and contributesto increased frame and machine life byreducing shock loads into the structures.

Radio-Ready. Includes standard 12V(10 amp) converter, speakers, antenna,wiring and brackets for an entertainmentradio. Entertainment radio is availableas a factory installed attachment. A CBradio-ready option is also available asan attachment and includes all wiringand hardware plus a 20-amp 24V to12V converter.

Floor Mat. Enhanced with contoursto provide for easier cleaning.

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General Purpose (GP) Buckets.Designed and built to Caterpillarspecifications, GP buckets performwell in a broad range of applicationsincluding excavation, stockpiling, anddozing. GP buckets are available invarious sizes for either pin-on or quickcoupler and can accept bolt-on edges,teeth, or teeth and segments.

Material Handling (MH) Buckets.Designed and built to Caterpillarspecifications, MH buckets maximizeperformance in free-flowing material,as found in many stockpile applications.MH buckets are available in varioussizes and can accept bolt-on edges,teeth, or teeth and segments.

Caterpillar Ground Engaging Tools.G.E.T. options include:

1 Bolt-on Cutting Edge. Reversible,with superior strength. Heavy-dutyedges are also available and provide50% more wear life.

2 Bolt-on Center and Corner Adapters.

3 Tips. Five tip options are available toprovide the best combination of wearlife, penetration, and strength requiredfor each application.

4 Segments. Heavy-duty, reversiblesegments protect the cutting edge,eliminating scalloping and maintaininga smooth work surface.

Heavy-Duty Rock Buckets. Ideal forquarry and mining applications, standardand heavy-duty rock buckets withvarious G.E.T. options are available.

Quick Coupler and Specialty WorkTools. A quick coupler and a widevariety of specialty buckets and worktools are available through either thefactory or Caterpillar Work Tools &Solutions (CWTS). Specialized worktool options include pallet forks, lumberand log forks, millyard forks, wastebuckets, plows, material handling arms,side-dump buckets, coal buckets, andwoodchip buckets.

High Lift Arrangement (Optional).Provides an additional 559 mm (22")of lift height over standard linkage foradditional dump clearance. Arrangementincludes extended lift arms, tilt cylinder,and additional counterweight.

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The 966G Series II is built for versatility and Caterpillar offers a wide variety of tools andspecial arrangements to match the job for maximum productivity.

Versatility and Application Match

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Quick Coupler

Waste Bucket

Pallet Fork

Millyard Fork

Waste Handler Arrangement (Optional).This arrangement provides additionalguarding and features for machinesused in waste transfer stations, waste toenergy plants, recycling stations, andcompost refuse processing. It offers the972G II heavy duty front frame, axleseal guards, narrow steel front fenders,headlight and tail light guards, hingedand electronically actuated power trainguard, front frame bottom guard,hydraulic tank guard, fuel tank guard,steering cylinder guards, and a heavyduty ladder with steel cable step.Options available with this arrangementinclude: (1) auto-reversing fan, toautomatically reverse on a timedcycle or by manual activation to easilypurge debris from the radiator; (2) roofmounted air conditioning; (3) Sy-Kloneair intake precleaner with trash screen; and(4) Caterpillar Work Tools waste bucket.

Forest Machine Arrangement (Optional).Coupled with a variety of Caterpillarwork tools including logging and millyardforks, woodchip buckets, pallet forks,and an optional quick coupler, the966G II forest arrangement is designedto handle a wide variety of millyardjobs. Forest arrangement offers the972G II heavy duty front frame, thirdvalve hydraulics, larger tilt cylinder,and additional counterweight for betterload control and higher static tippingload for greater payload.

Corrosion Resistant Paint (Optional).Provides a triple coat paint process,two coats of primer, and a final finishcoat. Silicon sealant is applied to allexposed electrical wire terminals andconnections to help protect them fromcorrosive atmospheres.

Aggregates Autodig (Optional, CC/EHonly). Designed primarily to benefitstockpile operations, Aggregates Autodigcontrols the lift and tilt functions duringthe loading cycle, while the operatormaintains control of steering, direction,and throttle. The ability to fully loada bucket with a consistent load timeprovides reduced operator fatigueand a constant level of productivitythroughout the workday.

Payload Control System (PCS; Optional).Enhanced for the G Series II, PCS allowson-the-go weighing of the bucket payloadduring the lift cycle with an accuracy of±1.5% (±1% for stationary machine).PCS records date, time, weight, numberof passes (up to 2,639 truckloads) withdownload capability.

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Low Exhaust Emissions, Fewer OilChanges. The electronically controlledengine adjusts the fuel-to-air ratio andthe ATAAC provides more efficientcombustion, lower fuel consumption,and cleaner emissions. The 966G IImeets all EPA Tier 2 requirementswithout sacrificing any expectedCaterpillar performance. In addition,engine oil change intervals are extendedto every 500 hours, after an initial250 hour oil change, helping toconserve natural resources.

Reduced Fuel Consumption and Noise.Electronically controlled, variable speedon-demand fan adjusts to meet thevarying cooling requirements of themachine throughout the work cycle.Hydraulics oil, engine oil, coolant, andair inlet temperatures determine fanspeed. In cooler operating conditions,average fan speed is reduced, resultingin less fuel consumption and lowernoise levels.

Fewer Leaks and Spills. Oil samplingvalves and pressure test ports for servicediagnostics are standard and reduce thechance of spills. Engine, transmission,and hydraulic oil ecology drains arestandard with the 966G II and allowfluids to be easily drained into acontainer without spillage. Axle oilecology drains are also offered as anoptional attachment.

Environmental Fluids. Extended lifeengine coolant with anti-foaming andanti-corrosive properties providesextended service intervals up to6,000 hours for fewer fluid disposals.The air conditioning coolant is CFC-free. A biodegradable oil that meetsCaterpillar’s BF-1 specification canbe used in the hydraulic system.

Recyclable and RemanufacturableComponents. Designed with recyclabilityin mind, the 966G II is comprisedof recyclable materials including castiron, steel, plastic, glass, and rubber.In addition, many large components aredesigned for rebuilding to help reducewaste in the environment and providecost savings to the customer.

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Environmental FeaturesCaterpillar cares for the environment and continues to develop innovative solutions.

Machine Selection. Cat dealers canhelp make detailed comparisons of themachines under consideration beforepurchase. It is important to comparemachine specifications, standardequipment, and attachment options.In addition, Cat dealers can estimatecomponent life, preventative maintenancecost, and the true costs of lost production.

Purchase. Beyond initial price,Cat dealers can explain all availablefinancing options as well as day-to-dayoperating costs. They can offer dealerservices that can be included in thecost of the machine to yield lowerequipment owning and operatingcosts over the long term.

Customer Support Agreements.Cat dealers offer a variety of productsupport agreements and will work withcustomers to develop a service plan thatbest meets each customer’s specificneeds. Service plans can cover theentire machine, including attachments,to help protect each customer’sinvestment.

Product Support. Cat dealers havenearly all parts available at their dealerparts counters. They utilize a worldwidecomputer network to locate in-stockparts, resulting in minimized machinedowntime. Genuine Cat Reman partsare available as an option to newcomponents and offer the customercost savings and a warranty withequal reliability.

Operation. Cat dealers can providetraining media and operating techniquesto assist owners and operators inincreasing productivity, which inturn increases profitability.

Maintenance Services. Cat dealersoffer a variety of maintenance servicesthat can be included with the initialmachine purchase. Repair optionprograms guarantee the cost of repairsup front. Diagnostic programs such asS•O•S, coolant sampling, and technicalanalysis help avoid unscheduled repairs.

Replacement. Repair, rebuild or replace?Cat dealers can help you evaluate thecost involved to make the right choice.

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Complete Customer SupportCat dealer services help you operate longer with lower costs.

Reduced Maintenance. Caterpillarradial seal filters provide efficientfiltration, extended filter life, and donot require tools to service, resultingin less maintenance time and loweroperating costs.

Extended Fluid Change Intervals.The 3176C extends engine oil changeintervals from 250 to 500 hours with theuse of CH-4 oil, after an initial 250 houroil change. The coolant system isfactory filled with Caterpillar extendedlife coolant, which can provide up to6,000 hours between change intervals.

Caterpillar Monitoring System (CMS).CMS provides a wealth of machineoperation and performance feedback,along with diagnostic codes, which aservice technician can use to quicklytroubleshoot problems. A warningsystem provides the operator fourcategories or levels of warning,depending on the severity.

Easy Access. Engine oil fill anddipstick are conveniently accessedthrough a lockable ground level servicedoor located on the right side of thehood. Swing-out cooling and airconditioning cores allow for quickservice and cleaning. The non-metallichood tilts electrically with an electricscrew-jack, located in the tool box onthe right rear frame. Hood tilts up to70 degrees for full access to engine,cooling system, and major components.The cab can also be easily removedfrom the machine in about 45 minutes.

Brake Wear Indicators. A standardfeature allowing a service technicianto measure and track brake wear.

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The 966G Series II continues Caterpillar leadership in wheel loader serviceability.

Serviceability

Maintenance-Free 950 CCA Batteries.Two maintenance-free batteries arelocated in a lockable battery box on theleft rear frame, sealed to prevent moisture.

Ground Level Maintenance Points.Remote grease lines are located in thehitch area in two convenient lube bankson the left side of the machine. U-jointsare lifetime lubricated. The slip joint isthe only driveline component requiringlubrication.

Convenient Sight Gauges. Transmissionoil, hydraulic oil, and radiator coolantsight gauges are conveniently locatedand visible from ground level.

Caterpillar Product Link 201 (Optional).Product Link 201 is a wireless systemusing satellite technology and theinternet to provide up-to-date machinelocation, service meter hours, andmachine health monitoring. Product Linksimplifies maintenance scheduling, fleetmanagement, unauthorized machineusage or movement, and product problemevent tracking and diagnosis. ProductLink is available installed from thefactory or can be added in the field.

Remote Pressure Taps (Optional).Remote pressure taps provide easyaccess to diagnostic pressure tapsfor transmission, torque converter,implement pumps. and steering (withconventional SW arrangement).

Automated Lubrication System(Optional). Available as a factoryinstalled attachment, this systemprovides precise lubrication on pinsand bushings at preset timed intervalswhile the machine is in operation.

Maintaining proper grease lubricationon working surfaces significantlyextends component life.

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18 966G Series II Wheel Loader specifications

Buckets

Bucket Capacities 3.5-4.25 m3 (4.5-5.5 yd3)

Transmission

Forward 1 7.2 kph 4.5 mphForward 2 12.6 kph 7.8 mphForward 3 21.7 kph 13.5 mphForward 4 37.2 kph 23.1 mphReverse 1 8.2 kph 5.1 mphReverse 2 14.3 kph 8.9 mphReverse 3 24.6 kph 15.3 mphReverse 4 38.5 kph 23.9 mph

• Maximum travel speeds (standard 26.5-R25 XHA L-3 tires)

Hydraulic System

Bucket/Work Tool System - 375 L/min 99 gal/minPump OutputBucket/Work Tool System - 20 700 kPa 3,000 psiRelief Valve SettingHydraulic Cycle Time - Raise 6.9 SecondsHydraulic Cycle Time - Dump 1.4 SecondsHydraulic Cycle Time - 1.8 SecondsLower, Empty, Float DownHydraulic Cycle Time - Total 10.1 SecondsPilot System - Pump Output 46 L/min 12 gal/minPilot System - Working 2585 kPa 375 psiPressure - PilotPilot System - Working 3450 kPa 500 psiPressure - E/H

• Bucket/Work Tool System, Vane-Type Pump - Rated at2111 rpm and 6900 kPa (1,000 psi).

Brakes

Brakes Meets requiredstandards.

• Meets the following standard: ISO 3450-1996.

Axles

Front Fixed frontRear Oscillating ±13°Maximum Single-Wheel 502 mm 19.8 inRise and Fall

Engine

Engine Model Caterpillar 3176C withATAAC

Flywheel Power 184 kW 246 hpMax. Flywheel Power 194 kW 260 hpFlywheel Power - ISO 9249 193 kW 259 hpFlywheel Power - EEC 80/1269 193 kW 259 hpPeak Torque (Net) @ 1,200 RPM 1215 N•m 896 ft-lbTotal Torque Rise 49%Bore 125 mm 4.9 inStroke 140 mm 5.5 inDisplacement 10.3 L 629 in3

• These ratings apply at 2150 rpm when tested under thespecified standard conditions for the specified standard.

• Power rating conditions for flywheel power advertisedis the power available when the engine is equipped withalternator, air cleaner, muffler and on-demand hydraulicfan drive at maximum fan speed.

• No derating required up to 3600 m (11,811 ft) altitude.

• The 3176C meets the following emission requirements:EU Stage II, US EPA Tier 2, and Japan MOC.

Weights

Operating Weight 22 870 kg 50,400 lb

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896 lb-ft 1215 N•m

260 hp 194 kWmaximum

246 hp 184 kWat 2150 rpm

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19966G Series II Wheel Loader specifications

Service Refill Capacities

Fuel Tank - Standard 380 L 100.4 galCooling System 80 L 21 galCrankcase 35 L 9 galTransmission 50 L 13 galDifferentials and Final Drives 64 L 17 gal- FrontDifferentials and Final Drives 64 L 17 gal- RearHydraulic System 207 L 55 gal(Including Tank)Hydraulic Tank 140 L 37 gal

Cab

ROPS/FOPS Meets SAE and ISOstandards

• Caterpillar cab with integrated Rollover Protective Structure(ROPS) are standard in North America and Europe.

• ROPS meets SAE J1040 APR88 and ISO 3471:1994 criteria.

• Falling Objects Protective Structure (FOPS) meets SAE J231JAN81 and ISO 3449:1992 Level II criteria.

• The operator sound pressure level measured according tothe procedures specified in ISO 6394:1998 is 75 dB(A) forthe cab offered by Caterpillar, when properly installed andmaintained and tested with the doors and windows closed.

• Hearing protection may be needed when operating withan open operator station and cab (when not properlymaintained or doors/windows open) for extended periodsor in noisy environment.

• The sound pressure level is 112 dB(A) measured accordingto the static test procedure and conditions specified inISO 6393:1998 for a standard machine configuration.

20 966G Series II Wheel Loader specifications

4.25 4.25 4.0 4.0 4.0 3.8 3.8 3.8 3.655.5 5.5 5.25 5.25 5.25 5.0 5.0 5. 0 4.75

3.62 3.62 3.43 3.43 3.43 3.28 3.27 3.27 3.124.7 4.7 4.46 4.46 4.46 4.27 4.25 4.25 4.06

3220 3311 3311 3059 3150 3150 3059 3150 315010'6" 10'10" 10'10" 10'0" 10'4" 10'4" 10'0" 10'4" 10'4"

3066 2929 2929 3066 2929 2929 3100 2963 296310'0" 9'7" 9'7" 10'0" 9'7" 9'7" 10'2" 9'8" 9'8"

1328 1449 1449 1328 1449 1449 1304 1426 14264'4" 4'9" 4'9" 4'4" 4'9" 4'9" 4'3" 4'8" 4'8"

2736 2917 2917 2736 2917 2917 2694 2875 28758'11" 9'6" 9'6" 8'11" 9'6" 9'6" 8'10" 9'5" 9'5"

129 129 99 129 129 99 129 129 995.0" 5.0" 3.8" 5.0" 5.0" 3.8" 5.0" 5.0" 3.8"

8870 9073 9073 8870 9073 9073 8828 9031 903129'1" 29'9" 29'9" 29'1" 29'9" 29'9" 28'11" 29'7" 29'7"

5832 5832 5832 5832 5832 5832 5794 5794 579419'1" 19'1" 19'1" 19'1" 19'1" 19'1" 19'0" 19'0" 19'0"

14 726 14 923 14 923 14 578 14 776 14 776 14 557 14 754 14 75448'3" 48'11" 48'11" 47'9" 48'5" 48'5" 47'9" 48'4" 48'4"

16 280 16 110 16 270 16 350 16 180 16 470 16 310 16 140 16 44035,881 35,506 35,859 36,035 35,661 36,300 35,947 35,573 36,234

14 470 14 310 14 460 14 540 14 380 14 650 14 500 14 330 14 61031,892 31,539 31,870 32,046 31,694 32,289 31,958 31,583 32,200

189.1 187.9 201.1 189.4 188.3 201.5 196.7 195.6 209.642,477 42,221 45,184 42,562 42,306 45,260 44,189 43,940 47,092

22 868 23 041 22 875 22 794 22 967 22 813 22 748 22 921 22 76750,401 50,782 50,417 50,238 50,619 50,280 50,137 50,518 50,178

Rated capacity

Struck capacity

Width

Dump clearance at full liftand 45° dischargeReach at full liftand 45° dischargeReach with lift arms horizontal and bucket level

Digging depth

Overall length

Overall height with bucketat full raise

Loader clearance circle withbucket in carry position

Static tipping load, straight**

Static tipping load, articulated at full 37° turnBreakout force***

Operating weight**

m3

yd3

m3

yd3

mmft/in

mmft/in

mmft/in

mmft/in

mmin

mmft/in

mmft/in

mmft/in

kglb

kglb

kNlb

kglb

Operation Specifications

General Purpose Buckets

Bolt-onedges

Teethand

segments TeethBolt-onedges

Teethand

segments TeethBolt-onedges

Teethand

segments Teeth

1400

2250 2500 2750 3000 3250 3500 3750 lb/yd3

yd3 m3kg/m3

4.50

4.75

5.00

5.50

3.50

3.65

3.80

5.25 4.00

4.25

1600 1800 2000 2200

Standard LiftBucket Selection Guide/Material Density

% = Bucket Fill Factor

115% 100% 95%

21966G Series II Wheel Loader specifications

3.65 3.65 3.5 4.0 4.0 3.8 3.8 3.8 3.65 3.5 3.5 3.5 3.54.75 4.75 4.5 5.25 5.25 5.0 5.0 5.0 4.75 4.5 4.5 4.5 4.5

3.1 3.1 2.96 3.46 3.46 3.31 3.22 3.22 3.08 3.0 3.0 3.0 3.04.04 4.04 3.85 4.49 4.49 4.3 4.18 4.18 4.0 3.9 3.9 3.9 3.9

3059 3150 3150 3220 3311 3311 3220 3311 3311 3306 3252 3306 325210'0" 10'4" 10'4" 10'6" 10'10" 10'10" 10'6" 10'10" 10'10" 10'10" 10'8" 10'10" 10'8"

3135 2999 2999 3021 2874 2874 3063 2916 2916 2952 2756 2952 275610'3" 9'10" 9'10" 9'10" 9'5" 9'5" 10'0" 9'6" 9'6" 9'8" 9'0" 9'8" 9'0"

1281 1404 1404 1204 1313 1313 1162 1270 1270 1273 1381 1273 13814'2" 4'7" 4'7" 3'11" 4'3" 4'3" 3'9" 4'2" 4'2" 4'2" 4'6" 4'2" 4'6"

2651 2832 2832 2701 2882 2882 2641 2822 2822 2799 3013 2799 30138'8" 9'3" 9'3" 8'10" 9'5" 9'5" 8'7" 9'3" 9'3" 9'2" 9'10" 9'2" 9'10"

129 129 99 129 129 99 129 129 99 129 129 129 1295.0" 5.0" 3.8" 5.0" 5.0" 3.8" 5.0" 5.0" 3.8" 5.0" 5.0" 5.0" 5.0"

8785 8988 8988 8835 9038 9038 8775 8978 8978 8933 9196 8933 919628'9" 29'5" 29'5" 28'11" 29'7" 29'7" 28'9" 29'5" 29'5" 29'3" 30'2" 29'3" 30'2"

5754 5754 5754 5783 5783 5783 5727 5727 5727 5716 5716 6042 604218'10" 18'10" 18'10" 18'11" 18'11" 18'11" 18'9" 18'9" 18'9" 18'9" 18'9" 19'9" 19'9"

14 535 14 732 14 732 14 709 14 905 14 905 14 679 14 874 14 874 14 837 14 945 14 837 14 94547'8" 48'3" 48'3" 48'3" 48'10" 48'10" 48'1" 48'9" 48'9" 48'8" 49'0" 48'8" 49'0"

16 440 16 270 16 570 16 080 15 910 16 210 16 180 16 020 16 320 16 350 16 260 16 190 16 10036,234 35,859 36,520 35,440 35,066 35,727 35,661 35,308 35,969 36,035 35,837 35,678 35,484

14 620 14 450 14 730 14 290 14 120 14 400 14 380 14 210 14 500 14 510 14 420 14 350 14 26032,222 31,848 32,465 31,495 31,120 31,738 31,694 31,319 31,958 31,980 31,782 31,630 31,429

203.4 202.3 217.3 196.0 194.9 208.8 206.1 205.1 220.4 180.0 178.9 179.2 178.145,704 45,442 48,819 44,029 43,797 46,920 46,313 46,075 49,515 40,441 40,195 40,262 40,018

22 705 22 878 22 724 22 863 23 036 22 870 22 793 22 966 22 800 22 919 23 011 23 077 23 16850,042 50,423 50,084 50,390 50,771 50,405 50,236 50,617 50,251 50,513 50,716 50,862 51,062

Material Handling Buckets Rock Buckets Heavy-DutyRock Buckets

Bolt-onedges

Teethand

segments TeethBolt-onedges

Teethand

segments TeethBolt-onedges

Teethand

segmentsBolt-onedges

Teethand

segmentsBolt-onedges

Teethand

segmentsTeeth

22 966G Series II Wheel Loader specifications

3.85 3.85 3.65 6.55.0 5.0 4.75 8.5

3.3 3.3 3.1 5.64.3 4.3 4.1 7.28

3112 3033 3033 335510'2" 9'11" 9'11" 11'0"

2975 2813 2813 2969 5589'9" 9'2" 9'2" 9'8" 1'10"

1414 1546 1546 1220 –254'7" 5'0" 5'0" 4'0" –1.0"

2861 3067 3067 2750 4049'4" 10'0" 10'0" 9'0" 1'3"

139 139 108 154 –255.4" 5.4" 4.2" 6.0" –1.0"

9003 9239 9239 8904 54429'6" 30'3" 30'3" 29'2" 1'9"

5742 5742 5742 6162 55818'10" 18'10" 18'10" 20'2" 1'9"

14 699 14 765 14 765 14 877 43248'2" 48'5" 48'5" 48'9" 1'5"

16 890 16 810 17 170 18 560 81037,226 37,049 37,843 40,906 1785

15 020 14 940 15 280 16 430 55033,104 32,928 33,677 36,212 1212

172.0 172.6 184.1 184.9 –15.638,633 38,770 41,363 41,542 –3505

22 693 22 810 22 659 23 444 190050,015 50,273 49,940 51,671 4188

Rated capacity

Struck capacity

Width

Dump clearance at full liftand 45° dischargeReach at full liftand 45° dischargeReach with lift arms horizontal and bucket level

Digging depth

Overall length

Overall height with bucketat full raise

Loader clearance circle withbucket in carry position

Static tipping load, straight**

Static tipping load, articulated at full 37° turnBreakout force***

Operating weight**

m3

yd3

m3

yd3

mmft/in

mmft/in

mmft/in

mmft/in

mmin

mmft/in

mmft/in

mmft/in

kglb

kglb

kNlb

kglb

Operation Specifications

* High lift column shows changes in specifications from standard lift to high lift.Add or subtract as indicated to or from specifications given for appropriate bucketto calculate high lift specifications.

** Static tipping load and operating weight shown include sound-suppression caband ROPS, 26.5 R25 XHA (L-3) steel radial tires, full fuel tank, coolant, lubricantsand operator.

*** Measured 102 mm (4.0"): behind tip of cutting edge with bucket hinge pin as pivotpoint in accordance with SAE J732c.

Quick Coupler Buckets WasteBuckets

High-LiftDelta*

Bolt-onedges

Teethand

segments TeethBolt-onedges

Allbuckets

23966G Series II Wheel Loader specifications

Dimensions All dimensions are approximate.

1 Height to top of ROPS 3580 mm 11'9"2 Height to top of exhaust pipe 3535 mm 11'7"3 Height to top of hood 2555 mm 8'5"4 Ground clearance/

Standard tire 26.5 R25 XHA (L-3) 471 mm 18.5"See chart below for other tires

5 B-Pin height 4225 mm 13'10"6 Overall height* Dimensions vary with bucket7 Center line of rear axle to edge

of counterweight 2460 mm 8'1"8 Wheelbase 3450 mm 11'4"9 B-Pin height @ carry 485 mm 19"

10 Center line of rear axle to hitch 1725 mm 5'8"

11 Rack back @ maximum lift 61°12 Dump angle @ maximum lift

(GP bucket) 50°**

13 Rack back @ carry 47°14 Rack back @ ground 42°15 Axle Housing Clearance 430 mm 1'5"16 Overall Length* Dimensions vary with bucket17 Digging Depth* Dimensions vary with bucket18 Reach* Dimensions vary with bucket19 Height to center line of axle 795 mm 2'7"

**Refer to Operation Specifications chart.**MH bucket is 45°.

Tread width for all tires is 2230 mm (7'4")

mm inches mm inches kg lb kg lb

26.5-25 20PR (L-2) 2965 117 –80 –3.2 –469 –1030 –349 –77026.5-25 20PR (L-3) 3035 119 –25 –1.0 –224 –490 –168 –37026.5 R25 XHA 1 (L-3)standard 2965 117 — — — — — —

26.5 R25 GP-2B 1 (L-3) 3000 118 –30 –1.2 –49 –100 –36 –80 26.5 R25 MX (L-5) 3000 118 +63 +2.5 +1012 +2230 +732 +1314

Width over tires

Change invertical

dimensions

NOTE:Tire options include tires and rims.

In certain applications (such as load-and-carry work) the loader’s productive capabilities might exceed the tires’ tonnes-km/h (ton-mph)capabilities. Caterpillar recommends consulting a tire supplier to evaluate all conditions before selecting a tire model.

Tires

Change inoperating

weight

Change instatic tipping

load – straight

23

1510

7 84

9

1413

12

11

5

6

16

17

18

19

1

Standard EquipmentStandard equipment may vary. Consult your Caterpillar dealer for specifics.

Power TrainBrakes, full hydraulic enclosed wet-disc

with Integrated Braking System (IBS)Engine, Cat 3176C diesel air to air aftercooled,

with ATAAC, electronically controlledFan, radiator, hydraulically driven, temperature sensing,

on-demandFilters, fuel/engine air, primary/secondaryFuel priming aid (electric pump)Muffler, sound suppressedPrecleaner, engine air intakeRadiator, unit core with ATAAC (6 fins per inch)Starting aid, etherSwitch, transmission neutralizer lockoutTorque converter, free wheel statorTransmission, automatic planetary power shift (4F/4R)Variable Shift Control (VSC)

Other Standard EquipmentAutomatic bucket positionerCounterweightCouplings, Caterpillar O-ring face sealDiagnostic Pressure TapsDoors, service access, lockingEcology drains for engine, transmission, and hydraulicsFenders, front and rearHitch, drawbar with pinHood, non-metallic power tiltingHoses, Caterpillar XT™Hydraulic oil coolerKickout, lift automatic, lift and tilt automaticLinkage, Z-bar, cast crosstube/tilt leverOil sampling valvesProduct Link ReadySight gauges:

Engine coolantHydraulic oil levelTransmission oil level

Vandalism protection caplocks

ElectricalAlarm, back-upAlternator, 65-amp, brushlessBatteries, (2) maintenance-free 950 CCAIgnition key; start/stop switchLighting system, halogen (6 total)Main disconnect switchStarter, electric, heavy-dutyStarting and charging system (24-volt)

Operator EnvironmentAir conditioner, heater, defrosterBucket/Work Tool function lockoutCab, pressurized and sound suppressed

ROPS/FOPS, entertainment radio-ready includes antenna, speakers and converter (12-volt, 10-amp)

Cigar lighter and ashtrayCoat hooks (2) with strapsControls, lift and tilt functionsComputerized Monitoring System

Instrumentation, Gauges:Digital gear range indicatorEngine coolant temperatureFuel levelHydraulic oil temperatureSpeedometer/tachometerTransmission oil temperature

Instrumentation, Warning Indicators:Axle oil temperatureElectrical, alternator outputEngine air filter restrictionEngine inlet manifold temperatureEngine oil pressureFuel level and pressure, Hi/LowHydraulic filter bypassHydraulic oil levelParking brakePrimary steering oil pressureService brake oil pressureTransmission filter bypass

Horn, electric Lunchbox and beverage holdersMirrors, rearview (internally mounted)Seat, Cat Comfort (cloth), air suspension (CC)Seat, KAB (cloth), mechanical suspension (SW)Seat belt, retractable, 76 mm (3 in) wideSteering column, adjustable angle (SW, CC)

and length (CC)Wet-arm, wipers/washers (front and rear),

intermittent front wiperWindows, sliding (left and right sides)

24 966G Series II Wheel Loader specifications

25966G Series II Wheel Loader specifications

Optional EquipmentOptional equipment may vary. Consult your Caterpillar dealer for specifics.

Starting AidHeater, engine coolant, 120-volt

Other Optional AttachmentsAirborne debris grillAutolubeAuto reversing fanAxle sealsCorrosion resistant paintForest arrangementHigh Lift arrangement High Lift arrangement with hydraulic third valveHigh speed oil changeLift cylinder baffleOil change system, high speedOpen cab, including ROPS structurePayload Control SystemQuick couplerRoof mounted air conditioningRubber mounted glass cabSecondary steeringValue packageVarious buckets and work toolsWaste Handler arrangement

Drive TrainAxle oil coolerDifferential Limited Slip, front/rear axleDifferential No SPIN, rear axle

ElectricalAuxiliary halogen lighting on cab, 2 front/2 rearDirectional lightsStarting aid receptacle

FendersFender extensionsRoading fenders

GuardsAxle sealPower train

HydraulicAutomatic Ride ControlHydraulic arrangement, third valve

Operator EnvironmentAggregates Autodig on CC/EHJoystick controlLift lever F-N-R switchMachine Security SystemOn the SW steering version:

Caterpillar Comfort air suspension seat, 6-way adjustable, cloth

Radio, AM/FM/Cassette with weatherbandRadio-Ready, CB with 20-amp 24V to 12V converterRearview mirrors, exteriorVisor

Preventive MaintenanceCat Turbine PrecleanerEcology drain, axleExtended Life Coolant antifreeze (–35° to –50° C)Product Link 201Remote Diagnostics Pressure Taps

26 966G Series II Wheel Loader specifications

Notes

966G Series II Wheel Loader specifications 27

Notes

R

For more complete information on Cat products, dealer services, and industry solutions, visit us on the web at www.CAT.com

© 2003 CaterpillarPrinted in U.S.A.

Materials and specifications are subject to change without notice.Featured machines in photos may include additional equipment.

See your Caterpillar dealer for available options.

AEHQ5521-02 (1-03)

Replaces AEHQ5521-01

966G Series II Wheel Loader

966G Series II Wheel LoaderEngineElectronic TransmissionCooling SystemAxlesOperator Station: Conventional Steering WheelOperator Station: Command Control SteeringVersatility and Application MatchEnvironmental FeaturesComplete Customer SupportServiceabilitySpecificationsOperation SpecificationsDimensionsStandard EquipmentOptional Equipment