Changing The Charge Pump And The Charge Check Valves - Sauer Danfoss 20 Series Service Manual

MINOR REPAIRS
(continued)
Series 20 – Axial Piston Pumps
Service Manual and Repair Instructions
Disassembly and Assembly

Changing the charge pump and the charge check valves

3 1, 2
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.
Hex-plug, Spring
Shims Valve cone
DKMH.PS.315.B1.02 520L0535
Socket wrench
F000 092
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
3
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.
Torque spanner
F000 078
Pin 4
5
3
F000 093
F000 063
21