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Greensmaster 3320/3420Hydraulic System Page 5 -- 62
Piston Pump Crush Ring Replacement
1. Crush ring
2. Shims
3. Cover plate
4. Housing
5. Swash plate (control shaft)
6. Bearing cone
7. Bearing cup
8. O--ring
9. Washers (3 used)
10. Cap screws (3 used)
Figure 44
v
6
4
5
8
7
2
3
9
10
1
29 ft--lb
(39 N--m)
Piston Pump Crush Ring Replacement (Fig. 44)
NOTE: The shims (item 2) replace the crush ring (item
1) in th e cover plate. If the swash plate, cover plate or
housingisreplaced during servicing of thepump,the old
crush ring can not be used to make sure of proper pre-
load.
1. Remove crush ring from the cover plate. Measure
thickness of crush ring.
2. Stack shims to the thickness of the crush ring.
3. Insert shims into the cover plate in the same location
that the crush ring was removed from.
4. Assemble housing sub assembly consisting of the
housing, swash plate, bearing cone, bearing cup and
cover plate (see Eaton, Medium Duty Piston Pump, Re-
pair Information, Model 70160 Variable Displacement
Piston Pump at the end of this chapter).
5. Install washers and cap screws to the cover plate
and housing. Torque cap screws to 29 ft--lbs (39 N--m).
6. Check torque required to rotate swash plate shaft.
Torque should befrom 15to 25 in--lbs(1.7 to 2.8 N--m).
A. If torque is too low, add additional shims and re-
peat steps 3 through 6 until the specified torque is
achieved.
B. If torque is too high, remove shims and repeat
steps 3 through 6 until the specified torque is
achieved.
7. Complete assembly of thepump(seeEaton,Me-
dium Duty Piston Pump, Repair Information, Model
70160 Variable Displacement PistonPump at the end of
this chapter).