Overview — Fuel Injection Rocker Arm AR2308-20
AR2308-20 is the fuel injection rocker arm used on CUMMINS engines to transfer camshaft motion to the fuel injector or valve, providing the precise actuation the injection system requires. We can supply this rocker arm as well as related CUMMINS valve train components, in stock or available on order — welcome to enquire by part number.
Parts Characteristics
The rocker arm is cast or forged to the original geometry, with the pivot bore, roller or pad surfaces machined to specification. The contact face is hardened for the service life of the valve train, and the adjustment screw and lock nut match the original thread. The oil passages are clear so the pivot and contact surfaces receive lubrication, and the arm is balanced to avoid excess load on the valve train. As an OEM-spec rocker, it restores the correct injector or valve motion and adjustment range.
Applicable Models & Applications
This rocker arm is used on CUMMINS engine families where the specified injection or valve actuation geometry applies, including the fuel injection rocker positions of the relevant engine series. Typical applications include construction, industrial, generator and marine installations. Confirm the pivot bore, adjustment range and the position (injector or valve) against the rocker arm removed from your engine before ordering.
Maintenance & Replacement
Inspect the rocker arm for wear on the contact pad, loose adjustment screws, cracks and blocked oil holes. Worn rocker contact surfaces cause injector or valve actuation to drift, showing as performance loss and increased noise. When replacing, follow the specified adjustment procedure and set the injector or valve clearance to the correct value with a feeler gauge. Torque the pivot bolt and adjustment lock nut to specification, and verify the oil supply to the rocker shaft after installation.
Price Reference (USD)
The reference price for this Fuel Injection Rocker Arm (AR2308-20) is approximately USD 30 – 120 per unit depending on grade, quantity and shipping destination. This is a planning estimate only — confirm current pricing and availability with our sales team before ordering.
Value & Service
Valve train parts must match the original geometry exactly, so we verify AR2308-20 against the CUMMINS specification and confirm the pivot bore and contact geometry before dispatch. We stock the rocker arm and can supply the complete rocker shaft assembly and adjustment parts for a full overhaul, shipped worldwide with tracking. Our team can confirm the correct rocker for your engine serial range.
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 rocker arm and related CUMMINS valve train components.
