Allis-Chalmers 2900 Mark II — Rocker Arms, Rocker Arm Shaft and Brackets, and Push Rods Removal, Disassembly, and Inspection
Repair & overhaul · Rocker arms, rocker arm shaft, brackets, push rods
For the Allis-Chalmers 2900 Mark II, from the Allis-Chalmers service manual.
Procedure
- Disconnect breather hose from cylinder head cover.
- Remove cylinder head cover capscrews, washers, and the cylinder head cover.
- Disconnect oil feed tube compression nut from fitting in cylinder head.
- Remove the 3/8" (9,5 mm) capscrews and lockwashers securing the rocker arm brackets to the cylinder head. Remove the 9/16" (14,2 mm) capscrews and hardened washers securing the rocker arm brackets; re
- Withdraw the push rods from the engine.
- Disconnect compression nuts; remove oil drain tube and oil feed tube from the end rocker arm brackets. Remove cotter pin, spacer washers and spring washer from one end of the rocker arm shaft. Slide r
- Inspect the end of the rocker arm adjusting screws and end of rocker arms. If worn, the rocker arm assemblies must be replaced.
Source: Allis-Chalmers service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.