Hummer H1 Service Manual page 70

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ROCKER ARM, SHAFT, AND PUSHROD SERVICE
Removal
1. Remove one or both rocker arm covers as needed. Refer to
procedures in this section.
2. Remove bolts and retainers that attach rocker arm shafts to
cylinder head (Figure 2-36). Note position of bolts for
installation reference. Bolts must be reinstalled in same
threaded holes.
.
05745159
PUSHROD
Figure 2-36: Rocker Arm Shafts and Pushrods
3. Lift and remove each rocker arm and shaft assembly
(Figure 2-36). Do not intermix assemblies if they will be
reused. Each assembly must be reinstalled in same
position.
4. Remove pushrods in sequence. Keep them in order of
removal. Also note which end of push rod goes in rocker
arm. This end of rod is heat treated and usually identified
with a paint mark
SHAFT
ATTACHING
BOLT
RETAINER
Engine 2-33
ROCKER ARM AND
SHAFT ASSEMBLIES