Clutch Installation and Clutch Installation and MaintenanceMaintenance

15.5 Easy Pedal and Heavy Duty Solo

Clutch BasicsClutch Basics

Provide means to disengage engine Provide means to disengage engine

Provide torsional vibration protectionProvide torsional vibration protection

Three factors that determine Clutch Three factors that determine Clutch capacitycapacity

1) Friction material1) Friction material

2) Surface area2) Surface area

3) Clamp load3) Clamp load

Cover AssembliesCover Assemblies

Contains Pressure PlateContains Pressure Plate

Determines plate loadDetermines plate load

Adjustable or Non-adjustableAdjustable or Non-adjustable

Release bearingRelease bearing

Does not affect torsionalsDoes not affect torsionals

Easy-Pedal Plus® 14” and 15.5” Heavy-Duty Solo™

Driven Discs “Dampers”Driven Discs “Dampers”

Torsional damper “Soft Rate”Torsional damper “Soft Rate”

Number of springsNumber of springs

Number of facingsNumber of facings

V.C.T. ™

7-Spring

Clutch BrakesClutch Brakes1-3/4 and 2.00”1-3/4 and 2.00”

Single piece “Torque Limiting”Single piece “Torque Limiting”

Two piece - non torque limitingTwo piece - non torque limiting

How They Work TogetherHow They Work Together

How They Work TogetherHow They Work Together

What Wears and Why Adjust for What Wears and Why Adjust for It?It?

When to Replace the ClutchWhen to Replace the Clutch

Eaton clutches should be replaced when internal Eaton clutches should be replaced when internal adjustment can not correct for a loss of free-pedal or can adjustment can not correct for a loss of free-pedal or can not compensate for a slipping clutchnot compensate for a slipping clutch

NOT: When you think it may slip soonNOT: When you think it may slip soon

When you think you have adjusted it too muchWhen you think you have adjusted it too much

When you think the lock strap wont hold the ringWhen you think the lock strap wont hold the ring

Easy-Pedal PlusEasy-Pedal Plus®® - 15.5” - 15.5”

Industry standard clutchIndustry standard clutch

Large application rangeLarge application range1050 to 2050 Lb-Ft1050 to 2050 Lb-Ft– 8-Spring8-Spring– 7-Spring7-Spring– 9-Spring9-Spring– 10-Spring10-Spring– V.C.T.™V.C.T.™

Clutch adjustment

15 1/2” Two Plate Angle spring/Easy Pedal Plus

• Using the internal adjustment of the clutch Set the bearing to clutch brake clearance, 1/2 to 9/16”.

Clutch adjustment

•Check/set the clearance between the yoke tips and the bearing wear pads for a minimum 1/8” clearance, the truck linkage is used to increase or decrease the clearance.

Clutch adjustment

•Insert a .010” feeler gauge between the bearing and the brake, depress clutch pedal to the end of it’s stroke to verify clutch brake squeeze.

Clutch adjustment

•The clutch brake will be squeezed if the total pedal stroke exceeds the 1/8” and the 1/2” settings.

•If not you will need to gain more linkage movement.

Clutch adjustment

If the brake is not being squeezed, do not change the 1/2” and 1/8” settings.

•Check linkage for worn components.

•Verify linkage is reassembled in correct hole locations.

•Increase pedal stroke (raising upper and lowering lower pedal stops).

Clutch adjustment

•Measure and record the free pedal in the cab-this is the normal free pedal for this truck (never use the in-cab free pedal to set up the clutch).

Clutch Lubrication

•In order to properly lubricate the release bearing bushings, grease must purge from the rear of the release bearing.

Spicer Solo Product FamilySpicer Solo Product Family

15.5” HD Eaton Spicer Solo

14” MD Eaton Spicer Solo

Spicer Solo Heavy-DutySpicer Solo Heavy-Duty

Spicer Solo Medium-DutySpicer Solo Medium-Duty

How It WorksHow It Works

Pressure Plate

BracketRelease Bearing

ShippingBolt Plate

Spacer

Cam Spring

Cams

Plate Spacer Controlled Gap

Cams Pressure Plate

How It Works

Wear IndicatorWear Indicator

How a MD Solo WorksHow a MD Solo WorksFront Driven Disc

Engine Flywheel

Rear Driven Disc

Intermediate Plate

Adjusting ring

Pressure Spring

Release Bearing

Retainer

Pressure Plate

Clutch Failure analysisClutch Failure analysis

Yoke Bridge Rubbing into CoverYoke Bridge Rubbing into Cover

•Worn or missing clutch brake.

•Excessive wear on release bearing pads.

•Improper setup of linkage system.

This Clutch was Properly This Clutch was Properly Adjusted InternallyAdjusted Internally

•By using the adjusting ring, because each of the 6 levers has more than one witness mark (or lever fulcrum point).

Bent/Broken Kwik-Adjust Bent/Broken Kwik-Adjust MechanismMechanism

•From not releasing the load from the pressure plate before making an adjustment.

Release Bearing Assembly Release Bearing Assembly Broke Away from Release Broke Away from Release

SleeveSleeve

•Due to lack of periodic lubrication.•Failure to fully release or ride clutch pedal.

Oil Soaked Ceramic DiscOil Soaked Ceramic Disc

•Leaking transmission and or leaking rear main engine seal.

Broken Drive PinBroken Drive Pin

•Missaplication of the clutch.

•Unequal loading of the drive pins.

Non-Eaton Spicer MaterialNon-Eaton Spicer Material

Input Shaft (drive gear) Spline Input Shaft (drive gear) Spline WearWear

•Engine torsionals/vibration.

Rear Disc Interfering with the Rear Disc Interfering with the Retainer AssemblyRetainer Assembly

•Adjusting the clutch externally with the linkage.

Keystone Wear PatternKeystone Wear Pattern

•Normal wear pattern.

Grease on Buttons of Ceramic Grease on Buttons of Ceramic DiscsDiscs

•Failure to remove rust preventative from the flywheel.•Greasing the splined areas of either the input shaft or disk.

Cracked Dampener CoverCracked Dampener Cover

•Allowing the transmission to hang unsupported in the driven disk during installation.•Misalignment between engine and transmission.