Piston Pump Crush Ring Replacement
4
5
8
7
29
(39
ft--lb
N--m)
2
3
9
v
10
6
1
Figure 36
1.
2.
3.
4.
Crush ring
Shims
Cover plate
Housing
5.
6.
7.
Camplate (control shaft)
8.
9.
O--ring
Bearing cone
Washers
Bearing cup
10. Cap screws
Note:
The shims replace the crush ring in the cover
5. Install washers and cap screws to the cover plate
and housing. Torque cap screws to 29 ft--lbs (39 N--m).
plate.Ifthecamplate,coverplate,orhousingisreplaced
during servicing of the pump, the old crush ring can not
be used to make sure of proper preload.
6.
Torque should be 5 to 15 in--lbs (0.6 to 1.7 N--m).
Check torque required to rotate control shaft.
1.
thickness of crush ring.
Remove crush ring from the cover plate. Measure
A. If torque is too low, add additional shims and re-
peat steps 3 through 6 until the specified torque is
achieved.
2.
3.
Stack shims to the thickness of the crush ring.
Insertshimsintothecoverplateinthesamelocation
B. If torque is too high, remove shims and repeat
steps 3 through 6 until the specified torque is
achieved.
that the crush ring was removed from.
4.
Assemble housing sub assembly consisting of the
housing, camplate, bearing cone, bearing cup, and cov-
er plate (see Eaton, Medium Duty Piston Pump, Repair
Information,Model70160VariableDisplacementPiston
Pump at the end of this chapter).
7. Complete assembly of the pump (see pump service
manual at the end of this chapter).
Hydraulic System (Rev. I)
Page 4 -- 64
Greensmaster 3250--D
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