Section IV. BASIC ENGINE REPAIR

TM 10-3930-634-34

haust valves and the center arm operates the fuel in-

3-22.

General

jector. Each set of three rocker arms pivoton a sep-

This section provides maintenance and repair instruc-

arate shaft supported by two brackets. Bolts secure the

tions for components of the basic engine. These corn-

brackets to the cylinder head.

ponents include but are not limited to the rocker arm,

(2) Push Rods. The rocker arms are operated by a

cam follower, rocker shaft, exhaust manifold, cylinder

camshaft through cam followers and short push rods

head, oil pan, crankshaft pulley, flywheel, piston and

extending through the cylinder head.

connecting rods, camshaft, crankshaft main bearing,

(3) Cam Followers. Each cam follower operates in

crankshaft, and the cylinder block.

a bore in the cylinder head to keep the follower rollers

in line with the cams.

3-23. Rocker Arms, Push Rods, and Cam

Follower

b. Removal.

(1) Rocker arms and shaft.

a. General.

(a) Remove rocker arm cover (para 3- 16).

(1) Rocker Arms. Three rocker arms are provided

(b) Rotate the engine in the direction of engine

for each cylinder; the two outer arms operate the ex-