Resolutions for Different Types of Belt Failures for 3500 and C175 Series Engines {1397} Caterpillar

Resolutions for Different Types of Belt Failures for 3500 and C175 Series Engines {1397}

Usage:

793B 1HL

Caterpillar Products Machine Engines: All 3500 Series; All C175 Series
Caterpillar Products Machine Engines: All 3500 Series; All C175 Series

Introduction

Do not perform any procedure in this Special Instruction until you have read the information and you understand the information. The following Special Instruction covers the identification and solutions to the different types of belts failures.

Types of Belt Failure and Resolution

Rib Wear

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Illustration 1	g06235123

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Table 1
Rib Wear
Causes	Resolution
Excessive slipping, low tension, and/or contamination	Check the tensioner and accessories. Replace the belt.

Chunk Out

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Illustration 2	g06235124

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Table 2
Chuck Out
Causes	Resolution
Excessive heat or cold, and/or flex fatigue	Check the tensioner and pulley condition. Replace the belt.

Abrasion

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Illustration 3	g06235126

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Table 3
Abrasion
Causes	Resolution
Excessive pulley surface roughness, foreign object, and/or slipping	Inspect the pulley surfaces. Replace the belt.

Pilling

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Illustration 4	g06235128

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Table 4
Pilling
Causes	Resolution
Misalignment and/or contamination	Align all the pulleys and clean off any contaminants. Replace the belt.

Uneven Wear/Rib Splitting

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Illustration 5	g06235129

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Table 5
Uneven Wear/Rib Splitting
Causes	Resolution
Misalignment, incorrect installation, and/or belt jumping	Align all the pulleys and check the pulleys condition. Replace the belt.

Cracking

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Illustration 6	g06235130

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Table 6
Cracking
Causes	Resolution
Extreme heat or cold conditions, and/or flex fatigue	Cracking alone is not a failure. Belts can continue to run for 2 to 3 times longer after the first cracking occurs. If the belt is still performing, check the tension and pulley condition. Monitor the belt for other failure modes.