Hydro-Gear HGM-H Series, Service And Repair Manual

Page: 219 / 280

82
PK Series
Refer to Figure 11.
Disassembly
1. Remove charge pump. (See page 62).
2. Using a 10 mm wrench, loosen the end cap bolts
(4) evenly.
3. Hold the end cap (2) in place and remove the
four end cap bolts (4).
4. Slowly remove the end cap (2).
5. Remove housing gasket (5).
Inspection
1. Inspect the end cap (2) body for damage, nicks
or unusual wear patterns. Replace if necessary.
2. Inspect the running surface (side that contacts
the cylinder block) of the end cap (2). The
running surface may show evidence of minor
abrasive rings, this is normal.
Grooving in the end cap, or material transfer
that is evident when the surface is checked by
dragging a fingernail across it, would be cause
for replacement of the end cap (2).
3. Replace the housing gasket (5) with a new
gasket before assembly.
Assembly
1. Install housing gasket (5) into gasket seat of
housing (1).
2. Lubricate the cylinder block (25) to end cap
(2) mating surface with clean oil prior to
installation.
3. Install end cap (2). Before installing the four
end cap bolts (4), push down on end cap
(92) verifying alignment and insuring that the
cylinder block pistons spring back and forth.
Install end cap bolts (4). Tighten to the correct
torque value. See Table 2, page 74 (Torque
Values).
4. Install the charge pump. (See page 80.)
REMOVAL, INSPECTION AND
ASSEMBLY OF THE END CAP
Figure 11. PK Pump End Cap
4
5
1
25
4
2