Overview – BEARING MAIN 193660
193660 is the standard-size main bearing used on CUMMINS V903 engines to support the crankshaft journals in the main bearing bores. We can supply this main bearing as well as the related family numbers listed below, in stock or available on order – welcome to enquire by part number.
Parts Characteristics
The bearing shell is built to the original bore size, width and wall thickness, with the steel backing and bearing alloy surface matched to the CUMMINS V903 crankshaft journal. The oil groove and locating tang follow the original layout so the shell seats correctly in the bearing bore and lines up with the oil feed. The bearing surface is finished to the original clearance specification. As an OEM-spec shell, it is installed without machining or adjustment.
Applicable Models & Applications
This main bearing is used on CUMMINS V903 engines in the standard size for original crankshaft journals, covering the main bearing positions in the engine block. The family reference 193670 covers the same bearing duty in an adjacent size grade. Confirm the journal diameter, width and size grade against the bearing removed from your engine before ordering.
Maintenance & Replacement
Worn main bearings show up as low oil pressure, knocking at idle and under load, and metallic debris in the oil filter. Inspect the bearing shells during overhaul for scoring, wiping, fatigue and excessive clearance. When replacing, measure the crankshaft journals for roundness and size, select the correct grade, and fit the shells dry and clean with the locating tangs seated. Torque the main bearing caps to specification in the correct sequence and verify crankshaft end play and oil pressure after reassembly.
Price Reference (USD)
The reference price for this BEARING MAIN (193660) is approximately USD 15 – 90 per unit depending on size grade, quantity and shipping destination. This is a planning estimate only – confirm current pricing and availability with our sales team before ordering.
Also in the BEARING MAIN Series
193670 and more.
Value & Service
The wrong size grade can wipe out a crankshaft in hours, so we verify 193660 against the original CUMMINS V903 journal size before dispatch. We stock the bearing and the family number above, and they can ship together with the connecting rod bearings and gasket set in one tracked order. Our team will confirm the correct size grade for your crankshaft before you buy.
Racer Machinery is a dedicated construction-machinery parts supplier – send us your part number and engine model, and we will confirm fitment, price and lead time for this main bearing and related CUMMINS overhaul components.
