(4) Valve and injector mechanism is lubricated by oil from a longitudinal oil passage on camshaft side of
cylinder head, which connects with oil passages in cylinder block. Oil from this passage enters drilled rocker arm shafts
through lower end of drilled rocker shaft bracket bolts.
b. Cylinder Head. Cylinder head is a one piece casting. It can be removed from cylinder block as an assembly
consisting of cam followers, cam follower guides, rocker arms, exhaust valves and fuel injectors.
5-64 Rocker arm and cam follower removal and disassembly
a. General. Cam followers may be removed from either top or bottom of cylinder head. When followers are
removed from bottom, cylinder head must be removed. When followers are removed from top, cylinder head removal is
b. Rocker Arm Removal
(1) Remove rocker arm cover.
(2) Remove fuel pipes from injector and fuel connectors.
Place shipping caps on injector openings immediately after removing lines to prevent dirt and
other foreign material from entering system.
(3) Turn crankshaft or crank starting motor to bring injector and valve rocker arms in line horizontally.
Do not bar crankshaft in a left hand direction of rotation with a wrench or barring tool on the
crankshaft bolt, or the bolt may be loosened.
(4) Remove two bolts (Figure 5-27) which secure rocker arm shaft brackets to the cylinder head. Remove
brackets and shaft.
When removing rocker arm shaft, fold three rocker arms back just enough to allow removal of
(5) Loosen lock nuts on upper ends of push rods, next to clevises, and unscrew the rocker arms from the push
If rocker arms and shafts from two or more cylinders are removed, tag them so they can be re-
installed in their original positions.