Generac Power Systems GTH760, Service Manual

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eNGINe dISASSeMblY
Drain oil, remove oil filter and remove engine from equip-
ment. Remove intake and exhaust systems. Remove engine
shroud and all cylinder wrappers. Disconnect stop switch
wires at ignition coils and remove ignition coils (see Section
2). Remove cylinder heads (see Section 5).
1. Remove the following parts (Figure 9-1):
a. Breather Assembly b. Alternator
c. Backplate d. Starter Motor
2. Remove crankcase cover/sump.
a. Discard gasket and O-ring.
3. Rotate crankshaft and camshaft until timing marks align
and remove camshaft (Figure 9-2).
Note: If necessary, place the engine flywheel side down
to prevent tappets from catching on the camshaft.
a. Remove tappets.
Note: Remove any carbon or ridge at the top of the cyl-
inder bores to prevent breaking rings when removing
piston and connecting rod assemblies.
4. Remove No. 2 connecting rod cap and push connecting
rod and piston assembly out through top of cylinder (Figure
9-3).
a. Reassemble cap to rod to prevent interchanging.
SeCTIoN 9: eNGINe dISASSeMblY
9-1
1. Fan Retainer
2. Fan
3. Flywheel
4. Alternator/
Lighting Coil
5. Backing Plate
6. Ignition Coils
7. Breather
8. Starter
9. Cylinder Head
10. Tappets
11. Push Rods
12. Crankcase Cover
13. Camshaft
14. Connecting Rod
15. Piston Assembly
16. Crankshaft
11
9
10
8
3
5
6
7
4
13
12
16
14
15
2
1
Figure 9-1. Partial View of Engine Breakdown
9