Changing The Servo Valve (Control Valve) - Sauer Danfoss 20 Series Service Manual

MINOR REPAIRS
(continued)
CAUTION:
Protect exposed surfaces
and cavities from damage
and foreign material. Use
caution so that the rings
and orifice plate remain in
place and do not fall into
the pump housing.
Series 20 – Axial Piston Pumps
Service Manual and Repair Instructions
Disassembly and Assembly

Changing the servo valve (control valve)

89, 90
Thoroughly clean external surfaces with steam or clean solvent and blow dry. Remove
the nine (9) cap screws (using 7/16 wrench) and swing control away from housing.
Slip the pin on control linkage out of the link attached to the swash plate and remove
control.The area is sealed with both a gasket and three (3) O-rings.
89, 90
DKMH.PS.315.B1.02 520L0535
82
F000 083
In preparation for installing the control,
place a new gasket on the housing. Insert
the orifice plate and three (3) O-rings into
the control ports.
Engage the pin on the control linkage in
the mating hole in the link attached to
the swash plate. Use caution so that the
O-rings and orifice plate remain in place
and do not fall into the pump housing.
Swing the control into place against the
pump housing. Install cap screws and
torque to 12 - 14 Nm [106 - 124 lbf•in].
82
F000 064
86
F000 046
23