Service Manual and
Axial Piston Pumps Series 20
Repair Instructions
L1003506
• Rev BA • Jun 2014
21
To remove the charge pump, loosen the four (4)
cap screws that form a rectangu lar pattern. Do
not remove the screws at the top and bottom as
these hold the segments of the pump together.
Lift the charge pump off the pump end cap.
There is a spacer in the idler shaft bore that can
slip out as the pump is removed. Do not allow it
to fall into the main pump. There is a gasket
between the charge pump and end cap that
should be discarded.
When installing the charge pump, align the new
gasket so that the small relief valve port is open.
Be certain the port in the charge pump and the
end cap are aligned. Rotate the charge pump
shaft so its tang aligns approximately with the
slot in the end of the main pump drive shaft.
Hold the idler spacer in place and install the
charge pump onto the end cap. Rotate the pump
slightly until the tang and slot on the shafts
engage and the pump is solidly on the end cap.
Insert four (4) cap screws and torque as specified
at the end of this manual.
Changing the charge pump and the charge check valves
F000 092
F000 093
F000 063
F000 078
Hex-plug, Spring
3
Shims Valve cone
Torque spanner
5
Pin
4
3
3
1, 2
Socket wrench
C
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rg
e p
re
ss
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e r
eli
ef v
al
ve
Sp
rin
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in
Disassembly and Assembly
Minor repairs
(continued)
