Endcap Installation - Danfoss 51 Series Repair Instructions

Repair Instructions
Assembly

Endcap installation

30
Series 51 and 51-1 Bent Axis Motors Repair Instructions
6. Locate the cylinder block in the approximate center of the housing opening.
Tip the housing until the endcap mounting surface is level to help keep the block centered. Do not
allow pistons or synchronizing shaft rollers to fall out of position
7. Using petroleum jelly, install the valve segment (B05) into the end cap so the segment spindle
engages the setting lug in the servo piston.
8. Orient the valve segment so the hole at the edge is aligned with the loop-flushing valve drain hole in
the end cap.
9. Locate the valve segment and servo piston in the approximate center of their travel.
Bearing plate and valve segment
C10
C20
SAE flange version shown
P104 105
(cartridge version similar)
1. Rotate the motor shaft and check for play between the shaft and cylinder block. Any play indicates
that the synchronizing shaft rollers are not installed correctly.
2. Install the end cap assembly and valve segment so the spindle engages the bearing in the cylinder
block.
C
Caution
Do not allow the pistons or synchronizing shaft rollers to fall out of position.
3. Install screws (G32) and (G34) to retain the end cap assembly to the motor.
Install the screws in their proper locations to ensure adequate thread engagement. The internal
spring (in the motor shaft) will hold the end cap away from the housing a short distance.
11009449 • Rev BA • December 2014
B05
B50
G60
B50
G32
see page 30
G34
End cap
(typical side port
configuration shown)