Piston Pump Crush Ring Replacement - Toro Greensmaster TriFlex 3320/3420 Service Manual

Piston Pump Crush Ring Replacement

6
1. Crush ring
2. Shims
3. Cover plate
4. Housing
Piston Pump Crush Ring Replacement (Fig. 44)
NOTE: The shims (item 2) replace the crush ring (item
1) in the cover plate. If the swash plate, cover plate or
housing is replaced during servicing of the pump, 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).
Hydraulic System
4
5
1
Figure 44
5. Swash plate (control shaft)
6. Bearing cone
7. Bearing cup
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 be from 15 to 25 in- -lbs (1.7 to 2.8 N- -m).
7. Complete assembly of the pump (see Eaton, Me-
dium Duty Piston Pump, Repair Information, Model
70160 Variable Displacement Piston Pump at the end of
this chapter).
Page 5 - - 62
8
7
2
8. O- -ring
9. Washers (3 used)
10. Cap screws (3 used)
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.
29 ft- -lb
(39 N- -m)
3
9
10
Greensmaster 3320/3420
v