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Pomp’s Tire Service, Pomp’s Tire Service, Inc. Inc. IRREGULAR WEAR IRREGULAR WEAR TRAINING TRAINING
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Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

Apr 01, 2015

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Page 1: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

Pomp’s Tire Service, Pomp’s Tire Service, Inc.Inc.

IRREGULAR IRREGULAR WEAR TRAINING WEAR TRAINING

Page 2: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CAUSES OF IRREGULAR CAUSES OF IRREGULAR WEARWEAR

Page 3: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

WORN – OUT TIRESWORN – OUT TIRES

WORN – OUT RADIAL TIRES ACT WORN – OUT RADIAL TIRES ACT AS A MESSENGER TO RELATE TO AS A MESSENGER TO RELATE TO

POSSIBLE MECHANICAL POSSIBLE MECHANICAL CONDITIONS CONDITIONS

Page 4: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

Irregular Irregular WearWear

Page 5: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CATEGORIES OF CATEGORIES OF

IRREGULAR WEARIRREGULAR WEAR

Consistent Circumferential Consistent Circumferential Irregular Wear -- a wear pattern all the Irregular Wear -- a wear pattern all the way around the tireway around the tire

Spotty Irregular Wear -- wear pattern in Spotty Irregular Wear -- wear pattern in various places on the tirevarious places on the tire

Page 6: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CAUSES OF CAUSES OF

CIRCUMFERENTIALCIRCUMFERENTIAL

IRREGULAR WEARIRREGULAR WEAR Vehicle misalignmentVehicle misalignment Inflation pressureInflation pressure Mismatched dualsMismatched duals Inconsistent dual inflationInconsistent dual inflation Lateral scrubLateral scrub Torque stressTorque stress Tread designTread design

Page 7: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

FFEATHER EDGE WEAREATHER EDGE WEAR Appearance Appearance

- - One edge of each rib higher than theOne edge of each rib higher than the otherother

What’s happeningWhat’s happening

- - Tire not tracking straight down highwayTire not tracking straight down highway

Probable causesProbable causes

- - Vehicle misalignmentVehicle misalignment

- toe- toe

- rear axle- rear axle

Corrective actionCorrective action

- - Steer tireSteer tire

- Correct toe in or toe out- Correct toe in or toe out

- Correct rear axle misalignment- Correct rear axle misalignment

-- Drive or trailer tires Drive or trailer tires

- Align axles- Align axles

Page 8: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

OONE-SIDED WEARNE-SIDED WEAR

Appearance Appearance

- - Excessive wear on one side of the tireExcessive wear on one side of the tire-- May begin as feather edge wear and May begin as feather edge wear and advance to one-sided wearadvance to one-sided wear

What’s happeningWhat’s happening- - Tire is worn from corrective steeringTire is worn from corrective steering due to vehicle thrust, cocked, tilted,due to vehicle thrust, cocked, tilted, or axle is bendingor axle is bending

Probable causesProbable causes

- - Vehicle misalignmentVehicle misalignment

- rear axle- rear axle

- toe- toe

- camber- camber

-- Overloaded axles Overloaded axles

Page 9: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

OONE-SIDED WEAR ContinuedNE-SIDED WEAR Continued

Corrective actionCorrective action

- - Steer tiresSteer tires

- Correct rear axle - Correct rear axle misalignmentmisalignment

- correct toe in or toe out- correct toe in or toe out

- check and correct camber- check and correct camber

- check load specifications- check load specifications

on axleson axles

-- Drive or trailer tires Drive or trailer tires

- align axles- align axles

Page 10: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

EEROSION/RIVER/ROSION/RIVER/

CHANNEL WEARCHANNEL WEAR Appearance Appearance

- - Wavy channel wear along rib edgesWavy channel wear along rib edges

following major tread voidsfollowing major tread voids

What’s happeningWhat’s happening- Frequently occurs in free rolling- Frequently occurs in free rolling

wheel positionwheel position

- Typical of tires with slow rate of wear- Typical of tires with slow rate of wear

Probable causesProbable causes- Tread element movement laterally- Tread element movement laterally

Corrective ActionCorrective Action

- - Remount and run in the opposite direction or install on a trailerRemount and run in the opposite direction or install on a trailer

Page 11: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

AALTERNATE LUG WEARLTERNATE LUG WEAR AppearanceAppearance

- - Alternate lugs wearing faster thanAlternate lugs wearing faster than

adjacent lugsadjacent lugs

-- May skip some lugs May skip some lugs

What’s happeningWhat’s happening-- Lugs not wearing consistently Lugs not wearing consistently

-- Lugs not making uniform contact Lugs not making uniform contact

with highwaywith highway Probable causesProbable causes

-- Tread design Tread design

-- Inconsistent dual inflation Inconsistent dual inflation

-- Mismatched duals Mismatched duals

Corrective ActionCorrective Action- - Consider different tread designConsider different tread design

-- Inflate tires to fleet standard Inflate tires to fleet standard

-- Match duals by tread design and tires size Match duals by tread design and tires size

Page 12: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CCAUSES OF AUSES OF CCIRCUMFERENTIALIRCUMFERENTIAL

IIRREGULAR RREGULAR WWEAREAR

Vehicle MisalignmentVehicle Misalignment

Page 13: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CCAUSES OF AUSES OF CCIRCUMFERENTIALIRCUMFERENTIAL

IIRREGULAR RREGULAR WWEAREAR Vehicle MisalignmentVehicle Misalignment

rear axle misalignmentdirection of

travel

Page 14: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CCAUSES OF AUSES OF CCIRCUMFERENTIALIRCUMFERENTIAL

IIRREGULAR RREGULAR WWEAREAR

Inflation Pressure And LoadInflation Pressure And Load

Properly inflated for load

Under-inflated for load

Over-inflated for load

Page 15: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

Air Pressure and Tire Inspection

Page 16: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

Master Gauge

Page 17: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

Single Axle with 3,000 poundsSingle Axle with 3,000 pounds

Page 18: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

Same Axle with 8,000 poundsSame Axle with 8,000 pounds

Page 19: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

Same Axle with 18,000 poundsSame Axle with 18,000 pounds

Page 20: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

ANY TIRE WITH LESS ANY TIRE WITH LESS THAN 80% OF THAN 80% OF

RECOMMENDED AIR RECOMMENDED AIR PRESSURE IS SUSPECTPRESSURE IS SUSPECT

TO ZIPPERTO ZIPPER

Page 21: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CCAUSES OF AUSES OF CCIRCUMFERENTIALIRCUMFERENTIAL

IIRREGULAR RREGULAR WWEAREAR Mismatched Duals Mismatched Duals

Page 22: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

When duals are mismatched:the larger diameter tire carries more loadthe smaller diameter tire wears fasterdrive train may be damaged

INSPECTING TIRES IN USE

Page 23: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

Dual MatchingDual Matching

Old rule – Anything less than 4/32nds Old rule – Anything less than 4/32nds tread depth variance was acceptabletread depth variance was acceptable

All tires are not created equalAll tires are not created equal R195 can be ¾ inch smaller than a G302 R195 can be ¾ inch smaller than a G302

casingcasing Match casing manufacturer and modelMatch casing manufacturer and model Measure with some type of toolMeasure with some type of tool

Page 24: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.
Page 25: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

SPOTTY SPOTTY IRREGULAR IRREGULAR WEARWEAR

Page 26: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CCONDITIONS OF ONDITIONS OF SSPOTTYPOTTY IIRREGULAR RREGULAR WWEAREAR

Cupping/scallop wearCupping/scallop wear Diagonal wearDiagonal wear Brake skid/flat spot wearBrake skid/flat spot wear Rib punchRib punch

Page 27: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CCAUSES OF SPOTTYAUSES OF SPOTTY

IIRREGULAR RREGULAR WWEAREAR Mismounted tire/wheel assemblyMismounted tire/wheel assembly Loose wheel bearingsLoose wheel bearings Worn bearings, shocks, springsWorn bearings, shocks, springs

or other suspension componentsor other suspension components Mismatched dualsMismatched duals Inconsistent dual inflationInconsistent dual inflation Out of balance wheel assemblyOut of balance wheel assembly Brake MisapplicationBrake Misapplication Aggressive brake applicationAggressive brake application

Page 28: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CCUPPING/UPPING/SSCALLOP CALLOP WWEAREAR

Appearance Appearance - - Irregular, scalloped outer rib wearIrregular, scalloped outer rib wear

What’s happeningWhat’s happening-- Tire not tracking straight down Tire not tracking straight down

highwayhighway

-- Tire bouncing slightly sideways Tire bouncing slightly sideways

Probable causesProbable causes-- Loose wheel bearings Loose wheel bearings

-- Mismounted tire/wheel assembly Mismounted tire/wheel assembly

-- Out of balance wheel assembly Out of balance wheel assembly

-- Tread design Tread design

-- Worn bearings, shocks, springs or other suspension Worn bearings, shocks, springs or other suspension components components

-- Mismatched duals Mismatched duals

-- inconsistent dual inflation inconsistent dual inflation

Page 29: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

CCUPPING/UPPING/SSCALLOP CALLOP WWEAR EAR ContinuedContinued

Corrective ActionCorrective Action

- - Tighten wheel bearingsTighten wheel bearings

-- Check wheel assembly for proper Check wheel assembly for proper

mounting of tire on wheel and axlemounting of tire on wheel and axle

- Match duals by tread design and tire- Match duals by tread design and tire

size size

- Inflate tires to fleet standard- Inflate tires to fleet standard

Page 30: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

DDIAGONAL IAGONAL WWEAREAR

AppearanceAppearance

- - Flat spots worn diagonally acrossFlat spots worn diagonally across

tread, repeated around tiretread, repeated around tire

circumferencecircumference

-- Tire pounding on highway Tire pounding on highway

-- Tire vibration Tire vibration

What’s happeningWhat’s happening

- - Tire not tracking straight downTire not tracking straight down

highwayhighway

-- Tire bouncing slightly sideways Tire bouncing slightly sideways

Page 31: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

DDIAGONAL IAGONAL WWEAR ContinuedEAR Continued Probable causesProbable causes

-- Loose wheel bearings Loose wheel bearings-- Mismounted tire/wheel assembly Mismounted tire/wheel assembly

-- Out of balance wheel assembly Out of balance wheel assembly-- Tread design Tread design-- Worn bearings, shocks, springs or Worn bearings, shocks, springs or other suspension componentsother suspension components

-- Mismatched duals Mismatched duals-- Inconsistent dual inflation Inconsistent dual inflation

Corrective ActionCorrective Action- - Tighten wheel bearingsTighten wheel bearings- - Check wheel assembly for properCheck wheel assembly for proper mounting of tire on wheel and axlemounting of tire on wheel and axle-- Test other tire brands, tire series or tread design Test other tire brands, tire series or tread design-- Match duals by tread design and tire size Match duals by tread design and tire size-- Inflate tires to fleet standard Inflate tires to fleet standard

Page 32: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

Centering Hub Centering Hub Piloted Wheel Piloted Wheel SystemsSystems

Page 33: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.
Page 34: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.
Page 35: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

QUESTIONS ?QUESTIONS ?

COMMENTS ?COMMENTS ?

CONCERNS ? CONCERNS ?

Page 36: Pomp’s Tire Service, Inc. IRREGULAR WEAR TRAINING.

THANK YOUTHANK YOU

WE AT WE AT POMP’S TIRE POMP’S TIRE SERVICE SERVICE APPRECIATE APPRECIATE YOUR YOUR BUSINESSBUSINESS