Generac Power Systems GTH1000, Service Manual

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10-3
SECTION 10: CYLINDER & CRANKCASE COVER
Figure 10-6. Check Magneto Bearing
CHECK PTO BEARING
The sump cover must be replaced if the bearing is damaged or if it
measures larger than 42.25mm (1.663”) in diameter (see Figure 10-7).
The diameter of the crankshaft may also make it necessary to replace
the sump cover. See Section 14 for the crankshaft measurement
details.
Figure 10-7. Check PTO Bearing
INSTALL PTO OIL SEAL:
Install a new PTO oil seal and press it in until it is 1.5mm (1/16”) below
the mounting surface.
CHECK CAMSHAFT BEARINGS
Use a telescoping gauge and caliper to check camshaft bearings.
If camshaft bearings are worn, crankcase or crankcase cover must
be replaced. (For vertical shaft engines, the oil pump cover must be
replaced). See Figures 10-8 and 10-9.
TELESCOPING
GAUGE
Figure 10-8. Checking PTO Side Camshaft Bearing
TELESCOPING
GAUGE
Figure 10-9. Checking Magneto Side Camshaft Bearing
OIL SEALS:
Always install new oil seals whenever engine is disassembled for
major servicing. Lubricate sealing edge of oil seal with clean engine
oil before assembly.
10