TM 5-4310-362-14
PISTONS, CRANKSHAFT AND CENTRIFUGAL UNLOADER MODEL 20-904
LOCATION/ITEM
ACTION
REMARKS
8-15.
DISASSEMBLY
1.
Locknut (1)
Loosen
2.
Valve elbow (2)
Unscrew
3.
Valve (3)
Unscrew
4.
6 capscrews (4)
Remove
5.
Cover and cup assembly
Remove
(5)
6.
Gaskets (6, 7 and 8)
Discard
Used gaskets do not seal properly.
7.
Plunger (9) and
Remove from weight retainer
spring (10)
and shaft assembly.
8.
Weight retainer and shaft
Unscrew from crankshaft by
Weight retainer shaft has left hand
assembly (11)
turning clockwise.
threads so it won't unscrew itself from
the crankshaft furing normal operation.
9.
6 capscrews (12)
Remove
10. Pistons (13)
Mark top of both pistons on
side closest to flywheel to make
sure you reinstall them in the
same position.
CAUTION
Pistons and connecting
rods may be damaged by
hitting crankcase when
the cylinder is removed.
Support pistons when
removing the cylinder.
11. Cylinder (14)
Remove by twisting it slightly
Support pistons from below while re-
back and forth while pulling
moving cylinder.
upward.
12. Gasket (15)
Discard
Used gaskets don't seal.
13. Crankshaft keyway
File sharp edges.
To prevent cutting oil seal.
8-18 Change 1
