Install Pto Oil Seal; Check Camshaft Bearings; Oil Seals - Generac Power Systems GTV-990 Manual

SECTION 10: CYLINDER & CRANKCASE COVER

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 bear-
ings. If camshaft bearings are worn, crankcase or crankcase
cover must be replaced. (For vertical shaft engines, the gero-
tor cover must be replaced).
Mag Bearing Reject Dimension: 20.06mm (.790")
PTO Bearing Reject Dimension: 18.06mm (.711")
TELESCOPING
GAUGE
Figure 10-10. Checking PTO Side Camshaft Bearing
TELESCOPING
Figure 10-11. Checking Mag Side Camshaft Bearing

OIL SEALS:

Always install new oil seals whenever engine is disassembled
for major servicing or when repairing bearings. Lubricate seal-
ing edge of oil seal with clean engine oil before assembly.
Always use the correct seal protector to prevent damaging oil
seal.
10-4
GAUGE