GMC 1976 ZEO 6083 Maintenance Manual page 699

24C- 22 ONAN MOTOR GENERATOR
CAUTION : Do not over-torque oil filter. Be
sure ring is installed around oil filter . This
ring acts as an air seal and prevents loss of
cooling air.
CRANKCASE BREATHER
This engine uses a crankcase breather valve for
maintaining crankcase vacuum . No maintenance is
generally required . If the crankcase becomes pressu
rized as evidenced by oil leaks at the seals, clean
baffle and valve in a suitable solvent. Crankcase
breather disassembly requires removal of exhaust
manifold . See Figure 31 .
REMOVAL,
CARBURETOR REPAIR
:(FIGURE 32)
1 . Disconnect fuel inlet hose and crankcase
breather hose .
FUEL SYSTEM
A-1621
Figure 31-Crankcase Breather
2. Remove air cleaner assembly .
3 . Disconnect governor, throttle linkage, and
choke control.
4. Remove two-hold down screws and lift carbu-
retor from intake manifold .