Generac Power Systems OHVI GSH 190, Service Manual

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9-5
SeCTIoN 9: lubrICATIoN SYSTeM
*
when working with compressed air, be sure to
wear appropriate eye protection to avoid personal
injury.
INSPECTION:
Clean the cover and blow dry with compressed air. Use com-
pressed air to blow out all bores and oil passages. Inspect the
cover for cracks, damage, etc. Check the crankshaft, camshaft
and balancer bearing bore diameters as outlined in Section
(Small Frame) or Section 5 (Large Frame).
GOVERNOR GEAR INSTALLATION:
. Apply engine oil to the governor gear shaft (Figure 9-0).
2. Install the governor gear thrust washer over the governor
gear shaft followed by the governor gear assembly.
. Slide the governor retainer ring to a distance of 8mm down
over the governor gear shaft.
. Lift the gear assembly up to the governor retainer ring.
5. Install the spool over the shaft so that the flange is under
the flyweights.
6. Slide the governor gear assembly, retainer ring, and spool
down the shaft until bottomed out.
SPOOL
GOVERNOR
RETAINER RING
GOVERNOR
GEAR ASSEMBLY
FLYWEIGHTS
GOVERNOR
GEAR
THRUST
WASHER
GOVERNOR
GEAR
SHAFT
Figure 9-10. Governor Assembly
CRANKCASE COVER INSTALLATION (LARGE FRAME ENGINE):
Install the crankcase cover as follows:
. Rest the engine on its side with the crankcase cover flange
facing upward.
2. Install the valve tappets, crankshaft, connecting rod assem-
bly, camshaft and balancer as described in Section .
. Make sure the timing marks on the crankshaft, cam-
shaft and balancer gears are properly aligned. Refer to
Figure -.
. Place the crankcase cover gasket onto the crankcase
flange.
5. Apply clean engine oil to the crankshaft, camshaft and
balancer journals.
6. Apply clean engine oil to the crankshaft, camshaft and
balancer bores in the crankcase cover.
7. Install the oil pickup screen. A locating tang on the outer
periphery of the oil pickup tube must mate with a locating
slot in the crankcase cover bore.
OIL PUMP
INNER ROTOR
OIL PUMP
OUTER ROTOR
OIL PICKUP
ASSEMBLY
CRANKCASE
GASKET
CRANKCASE
COVER BOLTS
DETAIL OF
LOCATING TANG
AND SLOT
Figure 9-11. Reassembly of Crankcase Cover and Oil Pump
NOTE: If the engine is equipped with an optional oil
filter, install the filter adapter, gasket and filter. If not
equipped with an oil filter, install adapter gasket and
oil block off cover.
8. Make sure the camshaft bore in crankcase cover and the
oil pump's inner rotor shaft have been coated with oil.
9. Apply a small amount of general purpose grease to the oil
pump inner rotor. The grease will help prevent the rotor from
dropping out when the cover is inverted for installation.
0. Install the oil pump inner rotor over the rotor shaft and
into the camshaft bore.
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