Generac Power Systems GTH1000, Service Manual

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ENGINE DISASSEMBLY
Drain oil, disconnect the wire harness,connector, cables and fuel hose.
Remove engine from equipment. 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. Flywheel b. Breather Assembly
c. Charging coil d. Backplate
e. 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 cylinder 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. Charging 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