Service Manual

99PR Series
Refer to Figure 10.
Disassembly
1. Prior to removal of the auxiliary pump, place a
mark on the auxiliary pump, charge pump (41)
and end cap (25) for alignment at assembly.
2. Use a 10mm wrench to loosen the auxiliary
pump bolts (56) from the end cap (25). While
holding the auxiliary pump in place, remove the
bolts (56).
3. Remove the auxiliary pump, gasket, O-ring (39)
and charge pump (41). While removing the
charge pump, be sure to retain the spring and
ball (44) housed in the end cap (25).
4. Remove the plug (156) from the lter cover
(67).
5. Use a 7/8 inch wrench to remove the lter cover
assembly (67) from the auxiliary pump.
6. Remove the O-ring and lter (54).
7. Remove the charge relief valve assembly (49)
and auxiliary relief valve assembly (45) from the
auxiliary pump.
Inspection
1. With the auxiliary pump removed, inspect the
pump running surfaces for wear or damage.
REMOVAL, INSPECTION AND/OR
REPLACEMENT OF AUXILIARY
PUMP (IF EQUIPPED)
Figure 10. PR Series Auxiliary Pump
2. Inspect all O-rings, gasket and mounting
seats.
3. Inspect the lter cover assembly threads and
lter for wear, damage or foreign material.
Assembly
1. Install the check ball, spring, and cap as one
assembly (45) into the auxiliary relief valve port.
Tighten to the correct torque value. See page
92.
2. Install the poppet, spring and cap as one
assembly (49) into the charge relief port. Tighten
to the correct torque value. See page 92.
3. Install the lter (54) and O-ring onto the lter
cover assembly (67). Install the assembly (67)
into the auxiliary pump and tighten. Install plug
(156) into the lter cover (67). See page 92 for
the correct torque value.
4. Lay the PR pump (input shaft down), so the end
cap is horizontal. Install the O-ring (39) into the
charge pump (41).
5. Install the gasket onto the auxiliary pump.
6. Make sure that the ball and spring (44) are
seated in the end cap (25), then position the
auxiliary pump and gasket with the aligning mark
on the charge pump (41). Insure that the pump
fully engages the alignment pins (69).
7. Align and insert the bolts (56) into the auxiliary
pump. While holding the auxiliary pump and
charge pump in place, tighten the bolts (56) per
table 2, page 92.
44
25
1
39
69
41
39
40
56
156
168
158
168
45
49
67
54