Sauer Danfoss 51 Series Service Manual page 73

Bent Axis Variable Displacement Motors
Minor Repair and Replacement - Variable Motor (Continued)
Blocking Plate for Multi-function Block Without
PCOR
The blocking plate may be removed by removing the
four (4) screws with a 5 mm internal hex wrench.
Remove the O-rings from the plate.
Install new O-rings on the blocking plate and retain
with petroleum jelly. Install the plate on the multi-
function block and install the screws. Torque the
screws to 11 Nm (8 ft•lbsf).
Pressure Compensator Valve for Pressure
Compensator Over-Ride (PCOR) and Pressure
Compensator Regulator (Type PC)
Loosen the adjusting screw lock nut with a 1-1/16"
hex wrench. Remove the adjusting screw from the
valve block with a large screwdriver.
Remove the pressure compensator valve spring and
the spool assembly from the block.
Remove the valve block plug with a 1" hex wrench.
Remove the four (4) screws retaining the valve block
to the multi-function block with a 5 mm internal hex
wrench. Remove the valve block and O-rings.
Install new O-rings on the pressure compensator
valve block and retain with petroleum jelly. Install a
new O-ring on the adjusting screw.
The plugs on the valve block may be removed with a
7⁄16" hex wrench. When reinstalling, torque the 5⁄16"
plugs to 9 Nm (7 ft•lbsf).
50 - 23
51000170
Fig. 50-124 - Remove
Blocking Plate (Less
PCOR)
51000142
Fig. 50-126 - Remove
PCOR•PC Adjustor
51000144
Fig. 50-128 - Remove
PCOR•PC Plug
Fig. 50-130 - Pressure Compensator Valve
Block Components
Series 51
51000171
Fig. 50-125 - Torque
Blocking Plate
Screws (Less PCOR)
51000143
Fig. 50-127 - Remove
PCOR•PC Spring
and Spool Valve
51000145
Fig. 50-129 - Remove
PCOR•PC Valve
Block
51000146
73