Danfoss S42 P Installation Guide

Service Kit Instructions
Series 42
Control bias spring upgrade
Removal of the control spool spring
1. Clean the external surfaces of the pump.
2. Remove the control spool bore plug (item D032)
with a 5/16 in internal hex wrench.
3. Remove the control spool bias spring (item D91).
Installing the Upgrade Bias Spring
4.
Assemble the spring guide (item D92) to one end
of the upgrade spring (item D91).
5. Install the spring and guide assembly into the
control spool bore noting proper orientation.
6. Install the new control spool bore plug (item
D032) using a 7/8 in wrench and torque to [40-95
Nm (30-70 ft• lbf)].
Final Adjustments
8. If the control neutral needs adjustment, refer to
BLN-10093 for proper procedure.
Spring Identification
Free Length
I.D.
D91
Old Spring
2.8 in
0.495 in
New Spring
3.35 in
0.433 in
D92
D032
D91
From
D
D032
To
© Danfoss, 2013
BLN-10159 • Rev AA • September 2013
1

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