Service Manual and
Axial Piston Motors Series 20
Repair Instructions
L1003443
• Rev BA • Jun 2014
20
Changing the valve manifold assembly
Disassembly and Assembly
The valve manifold assembly can be removed
from the motor and replaced in its entirety. The
following procedure shows removal of the entire
manifold from the motor before performing
fur ther disassembly.
The three (3) ports are sealed with O-rings and
the two (2) adjacent ports also have back-up
rings on top of the O-rings. These are rectangular
in cross-section and slightly cupped on one side
where they mate with the O-rings.
Remove the six (6) hex. cap screws and lift the
manifold off the motor end cap.
The O-ring should be placed in the port with the
full counterbore. The O-rings and back-up rings
fit in the ports with the machined grooves. The
O-ring should be installed first and then the
back-up ring.
Resume re-assembly procedure.
Torque spanner
1 2
10
3
6 5
3 4 6 5
3 4 5+6
Minor Repairs (continued)
