Overview – Front End Crank Seal 509-0493
509-0493 is the front end crankshaft seal used on CUMMINS engines to retain engine oil at the front of the crankshaft, keeping the seal area dry and preventing oil loss past the damper or pulley hub. We can supply this seal as well as related CUMMINS engine components, in stock or available on order – welcome to enquire by part number.
Parts Characteristics
The seal is manufactured to the original crankshaft and housing dimensions, with the lip profile and spring matched to the front hub surface. The lip material resists oil and temperature while maintaining a controlled seal against the running surface, and the case fits the housing bore with the correct interference. The sealing lip is sized for the original shaft diameter and accepts the standard installation tools. As an OEM-spec seal, it restores the designed oil retention at the front crankshaft.
Applicable Models & Applications
This front end crank seal is used on CUMMINS engine families at the crankshaft front seal position, including engines fitted with the original damper and hub arrangement. Confirm the shaft diameter, housing bore and seal direction against the seal removed from your engine before ordering.
Maintenance & Replacement
Replace the front crank seal when oil weeps from the front of the engine, and inspect the hub surface for wear or grooving that would damage a new lip. Fit the seal square to the bore with the correct installation tool, lubricate the lip with clean oil, and protect the lip from the hub edge during installation. Confirm the seal direction matches the original and check for leaks after the engine reaches operating temperature.
Price Reference (USD)
The reference price for this Front End Crank Seal (509-0493) is approximately USD 8 – 45 per unit depending on size, material, quantity and shipping destination. This is a planning estimate only – confirm current pricing and availability with our sales team before ordering.
Value & Service
A leaking front crank seal can coat the front of the engine and starve oil, so we verify 509-0493 against the original CUMMINS shaft and housing dimensions before dispatch. We stock the seal and related engine service parts and can consolidate orders into one tracked shipment. Our team can confirm the correct seal for your crankshaft front.
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 front end crank seal and related CUMMINS engine components.
