CYLINDERS
Checking Cam Gear Bearing
REPLACING PTO BEARING
Aluminum Cylinder Engines
The sump or crankcase cover bearing can be repaired in
the same manner as the magneto bearing. However,
one bearing should be completely repaired before
starting the other bearing. After the bearings are
finished, press in the new oil seals.
NOTE: Model 8B-HA, 80590, 81590, 82590,
80790, 81790, 82990, 92590, 92990,
110990, 111990.
The magneto bearing can be replaced as
above; if the sump bearing is worn, the
sump must be replaced. No tools are
available for replacing the sump bearing.
REPLACING OIL SEAL
The oil seal is assembled with the sharp edge of the
leather or rubber toward the inside of the engine.
Lubricate inside diameter of oil seals with "Lubriplate," or
equivalent, before assembling engines.
Most oil seals are pressed in, flush with the hub.
However, models 60000, 80000, 100000 and 130000
using a ball bearing with mounting flange have the seal
pressed 3/16" below crankcase mounting flange. Fig.
13.
Fig. 13 - Replacing Oil Seal
CHECKING CAM GEAR BEARINGS
Check cam gear bushing using 19164 plug gauge as
shown, Fig. 14. If 1/4" or more of’ gauge enters bearing
bore, bearing is worn beyond reject and the cylinder,
sump or crankcase cover must be replaced.
NOTE: On Model Series 111200, 111900, plug gauge
19164 is used on the sump or crankcase cover cam gear
bearing bore. Reject size of the cylinder cam bearing is
.443 or larger.
Fig. 14 - Checking Cam Gear Bearing
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