Electrohydraulic Proportional Control Service (Type Eq) - Sauer Danfoss 51 Series Manual

GROUP 3025
6.5.6 Electrohydraulic Proportional Control
(Type EQ) Service
(1) Remove the Pressure Control Pilot (PCP)
valve (Fig. 27) as detailed in paragraph
6.5.7.
Figure 27. PCP Valve Removal
(2) Remove the screws holding the the control
housing cover and control valve housing to
the multi---function block with a 4 mm inter-
nal hex wrench (Fig. 28).
Figure 28. EQ Control Housing Screw Removal
(3) Remove the housing cover and gasket (Fig.
29).
3025- -9A, Page 18
Figure 29. EQ Control Housing Removal
(4) Remove the valve housing with the pilot pis-
ton from the multi---function block.
(5) Remove the o---rings from the valve hous-
ing. Remove the pilot and spring from the
valve housing.
(6) Remove the pilot piston pin from the multi---
function block (Fig. 30).
NOTE
If required, the plugs in the control
housing can be removed with a 1/4"
internal hex wrench. When reinstal-
ling the plugs they must be torqued
to 15 ft.lbs. (20 Nm).
Figure 30. Pilot Piston Pin Removal
(7) Coat new o---rings with petroleum jelly and
install on the valve housing.
HYDRAULIC PUMP