6
60
CRANKCASE AND CRANKCASE COVER
Disassembly
Crankcase
Governor Crank
1. Remove spring clip from hole in governor crank.
Remove flat washer from crankcase boss.
2. Remove governor crank from inside crankcase.
3. Remove governor cup from governor gear shaft.
Low Oil Sensor (If Equipped)
1. Remove hex flange nut to release oil sensor fitting
from hole in crankcase.
2. Remove two hex flange screws to release oil sensor
from inside crankcase.
MAG Bearing/Oil Seal
1. Remove and discard oil seal from crankcase bearing
bore. Exercise care to avoid scratching bearing bore
during removal.
2. With the outside facing upward, support crankcase on
wooden blocks on deck of arbor press.
3. Place suitable bearing driver on outer race of bearing.
4. See Figure 75. Center bearing driver under ram.
5. Apply pressure to bearing driver until bearing is free.
Discard bearing.
75
Crankcase Cover
PTO Bearing/Oil Seal
1. Remove and discard oil seal from crankcase cover
bearing bore, if present. Exercise care to avoid
scratching bearing bore during removal.
2. With the outside facing upward, support crankcase
cover on wooden blocks on deck of arbor press.
3. Place suitable bearing driver on outer race of bearing.
4. Center bearing driver under ram.
5. See Figure 76. Apply pressure to bearing driver until
bearing is free. Discard bearing.
76
Cleaning
1. Tape over governor gear to keep out dirt and debris.
2. Using a plastic scraping tool, carefully remove old
gasket material from the crankcase and crankcase
cover flanges. Gasket material left on sealing
surfaces will cause leaks.
3. Remove all carbon deposits from machined surfaces.
Exercise caution to avoid removing any metal
material. For best results, use an air tool with a
worn
wire brush. Scraping may result in scratches or nicks.
4. To soften stubborn deposits, soak the crankcase and
crankcase cover in a suitable chemical solution or
other carbon and gum dissolving agent. Repeat steps
2-3 as necessary.
5. Thoroughly clean the crankcase and crankcase cover
in a non-volatile cleaning solution or solvent. Follow
up with a thorough wash in hot soapy water. Blow dry
with low pressure compressed air.
Not for
Reproduction
Summary of Contents for Vanguard 10V300
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