CATEngine Parts

3775237 Connecting Rod Bushing — Cat 785D 789C

This is a Connecting Rod Bushing, a crucial wear item that provides a bearing surface for the connecting rod to pivot on the crankshaft. It is precision-machined from high-strength bronze alloy to withstand extreme pressures and friction, unlike a worn bushing with excessive clearance or scoring. Operators may notice a distinct knocking or rattling sound from the engine, a drop in oil pressure, or increased engine vibration when this bushing fails.

Connecting Rod Bushing – Part No 3775237 – 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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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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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 TypeConnecting Rod Bushing
MaterialBronze Alloy
ApplicationEngine connecting rod
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — CTP aftermarket replacement

Failure Symptoms

The first audible sign of a failing connecting rod bushing is typically a deep knocking or 'rod knock' sound from the engine, especially under load. As wear progresses, this noise intensifies, oil pressure may drop significantly, and engine vibration increases. Continued operation risks catastrophic damage to the crankshaft and connecting rod, leading to complete engine failure.

Installation Tip

Ensure the crankshaft journal and the inside of the new bushing are meticulously clean and lightly oiled before installation. Pressing the bushing in crooked or damaging the oil passage can lead to immediate failure.

Service Note

Inspect the connecting rod journal on the crankshaft for scoring or out-of-roundness, and check connecting rod bolts for stretch when replacing the bushings.