Generac Power Systems GTH760, Service Manual

Page: 33 / 76

5-1
SeCTIoN 5: CYlINder HeAd ANd vAlveS
GeNerAl INForMATIoN
Compression testing information and procedures is described
in Section 1, under “Troubleshooting”.
Cylinders are numbered as shown in Figure 5-1.
Note: Cylinder #1 is closest to the flywheel.
Figure 5-1.
reMove CYlINder HeAdS
Disconnect exhaust system from exhaust manifold. Remove
exhaust manifold from engine. Disconnect choke and throttle
control cables. Remove spark plugs.
1. Remove the parts depicted in Figure 5-2.
a. Discard gaskets and valve cover seals.
REMOVE ROCKER ARMS:
1. Unlock jam nuts and remove two ball studs and rocker arm
assemblies (see Figure 5-3).
2. Remove push rods and identify each.
Note: The valve push rods are aluminum. Mark push rods
for identification to prevent interchanging.
1
2
5
7
6
3
4
1
2
3
4
5
6
7
8
8
VALVE COVE
R
L
O
WER WRAPPE
R
UPPER WRAPPE
R
BL
O
WER HOUSING
O
IL COOLE
R
INTAKE MANIF
O
LD
ASS
EMBLY
RO
TATING SCREE
N
FINGER GU
ARD
Figure 5-2.
5