CATEngine Parts

113-2907 Idler Gp Front — Cat 312 312B

This is a front idler group, a crucial component in the undercarriage system of CAT excavators, designed to maintain proper track tension and alignment. Manufactured with durable materials and precision bearings, it ensures smooth operation and longevity, unlike a seized or worn idler that causes excessive track wear and poor machine stability. Operators may notice excessive track slack, abnormal track noise, or uneven track wear if the idler group is failing.

Idler Gp Front – Part No 113-2907 – CAT Spare Part
Part Specifications
BrandCAT
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeIdler Group - Front
MaterialSteel, cast iron, rubber seals
ApplicationUndercarriage track tensioning
Service LifeReplace as needed due to wear or damage
CompatibilityCAT 312, 312B, 315, 315B, 315B L, 315C
ConditionNew — OEM specification aftermarket

Failure Symptoms

Early signs of a failing front idler include increased noise from the undercarriage, such as grinding or squealing, and visible track slack. If left unaddressed, the idler can seize or break, leading to track derailment and potential damage to other undercarriage components. A failed idler can immobilize the machine and cause significant downtime.

Installation Tip

Thoroughly clean the mounting surfaces and ensure all seals are properly seated before installation to prevent premature bearing failure. Avoid overtightening the mounting bolts, which can damage the idler housing.

Service Note

Inspect the track chains, rollers, and sprockets for wear and damage whenever replacing the front idler group.