CATBearing & Bushing

4W5699 Main Bearing — Cat 16G 16H NA

This is a CAT Main Bearing, essential for reducing friction and wear between the crankshaft and engine block in heavy-duty diesel engines. Manufactured to precise OEM specifications, it offers superior load-bearing capacity and durability over a worn bearing. Operators may observe a drop in oil pressure, knocking or rattling sounds from the engine, or increased engine vibration when a main bearing fails.

Main Bearing – Part No 4W5699 – 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 TypeEngine Main Bearing
MaterialSteel-backed Babbitt alloy
ApplicationEngine Crankshaft Main Journal
Service LifeReplace during engine overhaul or if worn
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing main bearing is often a persistent knocking sound from the engine, especially under load. If ignored, this can lead to increased engine vibration and a gradual loss of oil pressure. Continued operation risks severe crankshaft and block damage, potentially leading to engine seizure.

Installation Tip

Ensure all crankshaft journals and bearing surfaces are meticulously cleaned and free of any oil or debris before installation. Do not mix up the upper and lower bearing shells, as they are often designed with specific oiling grooves.

Service Note

Inspect the crankshaft journals for any signs of scoring or wear, and check the oil pump for proper pressure output when replacing main bearings.