Excavator Rocker Arm 8N3327 – Caterpillar 3304 3306B

Rocker Arm Assembly 8N3327 — Caterpillar 3304 / 3304B / 3306 / 3306B / 3306C Engine Rocker Arm

This engine rocker arm part number 8N3327 (cross-references 8N3325, 5S6855, 10R1713, 9N5980) is a Kingstream OEM rocker arm for Caterpillar 3304, 3304B, 3306, 3306B, and 3306C diesel engines in excavators, bulldozers, wheel loaders, generators, and heavy construction equipment. The Caterpillar 3300 series is one of the most widely deployed industrial diesel engine families globally — the rocker arm is the critical mechanical link between the camshaft and valves, receiving pushrod motion and transferring it to the valve stem with leveraged mechanical advantage for smooth, reliable valve actuation under continuous heavy-load operation. 6-month warranty. In stock with 1-3 day delivery. Ships worldwide by sea freight, air cargo, DHL, or FedEx. Kingstream OEM quality for Caterpillar heavy equipment fleet operators.

INSTALLATION PROCEDURE: Step 1 — Remove the valve cover. Step 2 — Loosen and remove the rocker arm shaft bolts in cross-pattern. Step 3 — Lift the rocker shaft assembly off the cylinder head. Step 4 — Slide the old rocker arms off the shaft, noting positions. Step 5 — Clean the shaft and inspect for wear. Step 6 — Install new rocker arms onto shaft with engine oil lubrication. Step 7 — Reinstall shaft assembly, torque bolts to Caterpillar specification. Step 8 — Adjust intake and exhaust valve lash to specification using feeler gauges. Step 9 — Reinstall valve cover with new gasket and verify quiet operation. 6-month warranty. Kingstream OEM.

SYMPTOMS OF ROCKER ARM WEAR: Valve train ticking noise proportional to engine speed, loss of compression from insufficient valve lift, uneven cylinder power balance, visible wear on rocker arm contact pads, and bent pushrods from rocker arm seizure. For Caterpillar 3300 series engine valve train maintenance, contact us. Kingstream OEM.

Technical Specifications

6-month warranty. In stock. Kingstream OEM. Contact us.

For Caterpillar and Dongfanghong diesel engine fleet valve train maintenance programs and rocker arm replacement, contact us for competitive pricing and global shipping options. Kingstream OEM quality with 6-month warranty.