CATBearing & Bushing

1W1656-040 Main Bearing — Cat 953 Engine: 3204

This is a precision-engineered main bearing, a vital component within the engine's crankshaft system that supports the rotating shaft and minimizes friction. It is manufactured to exact OEM specifications for material hardness and surface finish, ensuring optimal oil film support, unlike a worn bearing which would present scoring or excessive clearance. Operators may notice a distinct knocking sound from the engine or a significant drop in oil pressure when this bearing begins to fail.

Main Bearing – Part No 1W1656-040 – CAT Spare Part
Part Specifications
BrandCAT
CategoryBearing & Bushing
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

Never strike bearings directly — use a bearing press or driver set. Heat housing (not bearing) to ease installation. Replace bearings in sets where applicable. Check housing bore diameter before fitting — out-of-round bores destroy new bearings.

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

Part TypeMain Engine Bearing
MaterialSteel alloy with bearing overlay
ApplicationEngine crankshaft support
Service LifeReplace during engine overhaul or based on inspection
CompatibilityCAT 3204 engine equivalent
ConditionNew — OEM specification aftermarket

Failure Symptoms

The primary symptom of main bearing failure is a deep, rhythmic knocking sound from the engine, often more pronounced under load. If ignored, this can lead to a significant loss of oil pressure and accelerated wear on the crankshaft and cylinder walls. Continued operation risks catastrophic engine damage.

Installation Tip

Thoroughly clean the crankshaft journals and bearing saddles, ensuring no debris remains. Carefully lubricate the bearing surfaces with clean engine oil before installation.

Service Note

Inspect the crankshaft for straightness and wear, and check the oil pump and pressure relief valve when replacing main bearings.