Sauer Danfoss 51 Series Service Manual page 63

Bent Axis Variable Displacement Motors
Minor Repair and Replacement - Variable Motor (Continued)
Install the pilot piston pin in the multi-function block.
Install the outer (thin) shuttle piston plug with the large
chamfer toward the shuttle valve bore. Install the
shuttle spool into its bore and install the inner (thick)
plug with the large chamfer toward the shuttle valve
bore.
Position the valve housing (with O-ring) on the multi-
function block.
Install the pilot piston into the housing and over the
pin. The end of the piston with the cross drilled hole
should engage the pin.
Install the small spring in the outer end of the pilot
piston.
Install the control cover and gasket. Align the control
assembly with the multi-function block and install the
four (4) screws.
Torque the control screws to 6.4 Nm (4.7 ft•lbsf).
50 - 13
51000097
Fig. 50-63 - Pilot
Piston Pin Installed
51000099
Fig. 50-65 - Install
Control Housing
51000101
Fig. 50-67 - Install
Spring
Series 51
51000098
Fig. 50-64 - Install
Shuttle Spool and
Plugs
51000100
Fig. 50-66 - Install
Pilot Piston
51000102
Fig. 50-68 - Install
Cover, Gasket, and
Screws
63