v-belt troubleshooting and failure analysis guide & stratton... · v-belt troubleshooting and...
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V-Belt trouBleshooting and Failure analysis guide
Simplicity® Snapper® Massey Ferguson® Agco® Agco Allis Duetz-Allis Allis Chalmers® Murray® Brute®
Joe’s Small Engine& Repair Shop
1234 Main St.Anytown, USA 000000
(000)000-0000
M-F: 8:00 am- 7:00 pmSat.: 10:00 am - 5:00 pm
Present this coupon to receive special offer. Expires XX/XX/XX
Present this coupon to receive special offer. Expires XX/XX/XX
Mr. John Smith333 N. Third StreetAny Town, WI 55535
©2006 Briggs & Stratton Corp.
Maintain the Tradition
BRIGGS & STRATTON Generation to Generation
Briggs & Stratton has been providing outdoor power equipment engines for the last 80 years and will continue to for generations to come.
See the back for Maintenance Coupons and Specials.
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neW For 2009Learn more about Dealer Promotions and Custom Marketing Materials on the Power Channel.
Custom marketing BeneFits
Briggs & Stratton Dealer Promotions offer Custom Marketing materials as an easy and affordable way to promote your business.
These materials include:
• Post Cards
• Sell Sheets
• Hang Tags
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• Dealer Labels
• Apparel
• Higher response rates - return on your investment! Mailing lists targeted to your customers produce higher response rates than bulk mail.
• Affordable custom materials
• Options include distribution to customers
• Easy-to-use system
• 24/7 ordering
• Professionally designed and printed
• Completely self-contained solution - You order and we take care of the rest.
• Co-oped by Briggs & Stratton. The pricing shown on post cards, sell sheets and hang tags is 50% of cost. No co-op claims need to be submitted for this program.
We do all the Work, and you gain the Customers!
Contact your Briggs & Stratton Distributor or call 1-877-249-6647 to enroll in the program and set yourself up to increase sales in 2009!
dealer Custom marketing
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This belt failure guide is designed to assist in inspecting failed belts and understanding the possible cause of the belt failure.
By having an understanding of the cause and effect relationship of belt failures, ensures an accurate and time effective repair.
Most belts will operate for years with trouble-free performance. By assisting customers in determining the cause of a belt failure and resolving the cause of the failure, will result in increased customer confidence in the dealership and the product.
Use only genuine Briggs & Stratton Power Products Group belts specifically manufactured for use on Simplicity®, Snapper®, Murray®, Brute™, Massey Ferguson®, Agco®, Agco Allis, Duetz-Allis and Allis Chalmers® Lawn and Garden Equipment.
HiGH quALity, LonG LiFE BELtS
Each is designed, engineered and tested to assure extended trouble-free performance.
Briggs & Stratton Power Products Group uses high quality belts for the following reasons:
•Resistoil,dirtandtemperatureextremes•Lastuptofourtimeslongerthanautomotivebelts•Lowercostperhourofoperation•Cleanoperationandrequirenolubrication•Coverawiderangesofhorsepower•Veryruggedandwillprovideyearsoftrouble-freeperformanceevenunderthemostadverse
conditions•Smoothstartingandoperation•MostareconstructedwithAramidcords
V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
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toP 10 StEPS For CHECkinG V-BELt iSSuES
1. Checkbladesforcorrectbalancingandpartnumber.
2. Alldeckpulleyscheckedforwearorinconsistencies.
3. Alldeckpulleysareonthesameplane.
4. Idlersshouldbecheckedforangleoroutofplane.
5. Idler arm should be free to rotate and maintain belt tension.
6. Makesurethebeltinstallediscorrectlength,partnumber,andconstructionand has no damage.
7. No objects should touch belt other than pulleys and idlers.
8. Checkdeckforproperadjustment.Height,sidetoside,fronttoback.
9. Belt tension springs for damage or defect.
10. Spinspindlesslowlyandlookforbentshaftsandpulleys.
tESt ProCEDurE WitH MACHinE runninG AnD oPErAtor PoSitionED in SEAt
1. Runatfullthrottle,bladesnotrunning,noticeifthereisexcessivevibrationfromengine.
2. At¾throttleengageblades,watchforextremebeltmovement.Repeatthisat½throttleand full throttle. (Some movement is normal.)
3. Withbladesrunningnotethevibration,(thisshouldbecheckedasthethrottleismovedslowlyfrom½tofull.)Heavyvibrationmayrequirethatyoutryanotherbeltorrecheckpulleys and spindles
V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
3
V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
trouBLE ArEA AnD oBSErVAtion
CAuSE rEMEDy
Short Belt Life Incorrect part number belt used Replacewithoriginalequipmentpartnumber belt
relatively rapid failure; no visible reason
Tensil members damaged through improper installation or adjustment
Replacewithnewbeltproperlyinstalled or adjusted
Wornsheavegrooves.Checkwithgauge
Replacesheaves
Side walls soft and sticky, low adhesion between cover plies, cross section swollen
Oil or grease on belt or sheaves Removeoilandgrease.Replacebelt(s) and clean groves with cloth moistened with non-toxic, non-flammable degreasing agent or commercial detergent and water
Side walls dry and hard. Low adhesion between cover plies. Bottom of belt cracked
Hightemperatures Checkforexcessiveslippageorexcessive load
Deterioration of rubber compounds used in belt
Belt dressing Neverusedressingonv-belts.Cleanwith cloth moistened with non-toxic, non-flammable degreasing agent or commercial detergent and water. Tighten drive belt properly to prevent slip
Extreme cover wear Belts rub against guard or other obstruction
Removeobstructionoraligndrivetogive needed clearance
Spin burns on belt Belt slip under starting or stalling under load
Adjusttensionasperoperator'smanual or replace belt if severely damaged
Broken belts Suddenshockorimpact Be sure shields are in place and remove source of objects contacting drive pulley or blades
Worn side pattern
Constantslippage Adjusttensionasperoperator'smanual or replace belt if severely damaged
Misalignment of sheaves Checkandadjust
Worn sheaves Install new sheaves
Wrong belt cross section Use correct part number belt
Exposure to abrasive material Replacewornpartsandbesureproper covers are installed
Bottom of belt cracking
Heatbuild-upfromconstantslipdamaging under cord
Install correct belt, adjust tension as peroperator'smanual
Belt stored improperly Use recommended storage practice
Belt operating near high heat raising operating temperature
Use correct shielding from heat source. Check ventilation and debrisbuildup
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V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
trouBLE ArEA AnD oBSErVAtion CAuSE rEMEDy
Belt turnover pattern Misaligned sheaves Realignthedrivesystem
Worn sheave grooves Improper belt tension AdjusttensionperOperator’sManual
Tensilememberbrokeninsidebelt through improper installation or adjustment
Replacewithnewbelt(s)
Incorrectly aligned idler pulley Carefullyalignidler,checkalignment with drive loaded and unloaded
BELt turnoVEr PAttErn
5
V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
trouBLE ArEA AnD oBSErVAtion
CAuSE rEMEDy
Belt pulled apart Extremeshockload Removecauseofshockload
Belt came off drive Checkforforeignmaterialindrive.Andinsurepropertensionand drive alignment
BELt PuLLED APArt
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V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
trouBLE ArEA AnD oBSErVAtion
CAuSE rEMEDy
Severe corner and surface wear pattern
Constantslip AdjustdriveperOperator’sManual
Misalignment Re-alignsheaves
Worn sheaves Replacewithnewsheaves
Incorrect belt Replacewithnewbelt(s)
SEVErE CornEr AnD SurFACE WEAr PAttErnS
7
V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
trouBLE ArEA AnD oBSErVAtion
CAuSE rEMEDy
Side worn Misalignment Realignsheaves
Worn sheaves Replacewithnewsheaves
Incorrect belt Replacewithnewbelt(s)
Worn SiDE PAttErn
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V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
trouBLE ArEA AnD oBSErVAtion
CAuSE rEMEDy
Side and bottom of belt burned Belt slipping under starting or stalling under load
ReplacebeltandtensiondriveasperOperator'sManual
Worn sheave Replacesheaves
BottoM AnD SiDE BurnED
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V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
trouBLE ArEA AnD oBSErVAtion
CAuSE rEMEDy
Bandcoverhasflakedoffandthesidessidewallsaresoftandsticky
Oil or grease on belts or sheaves Removesourceofoilorgrease.Cleansheavegrooveswitha cloth moistened with non-flammable, non-toxic degreasing agent or commercial detergent and water
BAnD SiDEWALL
10
V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
trouBLE ArEA AnD oBSErVAtion
CAuSE rEMEDy
Belt cut on bottom Belt came off sheave Checkdrivetensionandalignment--re-tension and align drive properly
Foreign material fell into belt drive makingbeltcomeoff
Shielding not in place
Belt forced over the sheave flange duringinstallationwithoutslackingof the drive
Install newbelt(s) properly, slackoff belt drive
BELt Cut on BottoM
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V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
trouBLE ArEA AnD oBSErVAtion
CAuSE rEMEDy
Bottomofbeltcracking Belt slipping, causing heat buildup and gradual hardening of under cord
Install new belts. Adjust tensionasperOperator'sManual
Idler pulley on wrong side of belt CheckOperator'sManualforbeltrouting
Improper storage Refertobeltstorage
BAnD SiDEWALL
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BELT & BLADE — READY REFERENCE — 2007 Edition
TP 900-2222-09-UV-SMBA Appendix D-1
Belt Cross Section Chart
V-BELt trouBLESHootinG AnD FAiLurE AnALySiS GuiDE
suPPort PuBliCations
Briggs & Stratton Service Tools Catalog Form MS-8746
Briggs & Stratton “Outdoor Cleaning with PRESSURE WASHERS”
Part #195888GS
Briggs & Stratton Master Parts Catalog Form MS-4185
Briggs & Stratton Small Engine Care & Repair BookPart #274041
Briggs & Stratton Small Engines Text BookPart #CE8020
CE8149-1/09
For more educational information contact us at 1-800-934-7730
or e-mail us at [email protected] • Printed in the U.S.A.
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cUSTOmeR edUcATIONPO BOX 702mIlwAUkee, wI 53201 USA414 259 5333copyright ©2009. All rights reserved.