CATEngine Parts

353-7439-353-2748 1 Set Main Bearing — Cat Engine C3 3

This set of main bearings is essential for supporting the rotating crankshaft within the engine block, reducing friction and wear. Manufactured to exact OEM tolerances, these bearings ensure smooth crankshaft rotation and proper oil film formation, unlike worn bearings that allow excessive movement and noise. Observable symptoms of failing main bearings include a deep rumbling or knocking sound from the bottom of the engine, especially at idle, and a significant drop in oil pressure.

1 Set Main Bearing – Part No 353-7439-353-2748 – 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.

WhatsApp for Price & Availability☎ Call Mumbai Office

Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

;

Related CAT Parts

From the same category — may also be needed

1484732
Gear-Sun
422-0728
Boom Cylinder Seal Kit
348-6738
Muffler Hose
4n-7601-7c-6703-0r-5953
Turbo Tv8116 Turbocharger
217-1481
Cylinder Head
6v-2305
Floating Seal

Browse all CAT Engine Parts →

Ship This Part To Your Location

DubaiSaudi ArabiaNigeriaKenyaSouth AfricaBangladeshMalaysiaGhanaQatarEgypt
India
MaharashtraGujaratTamil NaduRajasthanKarnatakaTelangana

Full shipping information on regional pages · Air freight 2–12 days · GST invoice for India

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 TypeMain Bearing Set
MaterialSteel-backed babbitt or aluminum alloy
ApplicationEngine crankshaft main journals
Service LifeReplace as part of engine overhaul or if worn
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

The initial symptom of worn main bearings is often a low-frequency knocking or rumbling noise originating from the lower engine block, particularly noticeable at idle or low RPMs. As wear progresses, this noise becomes more pronounced, and oil pressure readings will typically drop significantly. Continued operation can lead to severe crankshaft and block damage.

Installation Tip

Always use a clean, lint-free cloth to clean bearing surfaces and crankshaft journals before installation. Never reuse old main bearing bolts; always use new ones.

Service Note

Inspect the crankshaft for straightness and journal wear, and check the oil pump for proper pressure output.