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

Service Manual and
Repair Instructions
Disassembly and Assembly
Minor repairs
(continued)
Axial Piston Pumps Series 20

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.
C 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.
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.
F000 064
89, 90
L1003506 • Rev BA • Jun 2014
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
86
F000 046
23