Displacement Limiter Adjustment For Single Pumps - Danfoss H1P 045 Service Manual

Service Manual
H1P 045/053/060/068 Axial Piston Single Pumps
Adjustments

Displacement Limiter Adjustment for Single Pumps

40 | © Danfoss | June 2020
If your pump has displacement limiters, you will find them on either servo cover. You can limit forward
and reverse displacement independently.
Displacement limiters are not pre-set by the factory. We install them as far as possible without contacting
the servo piston. Limiting displacement requires clockwise adjustment of the limiting screw.
C
Caution
Before adjusting the displacement limiter, mark the position of the servo cylinder. Be sure the servo
cylinder does not turn when setting the displacement limiter locknut.
Displacement Limiter Adjustment
Limiting Screw
(see table)
Locknut
(see table)
1. Loosen the locknut.
2. Rotate the adjusting screw to achieve the desired maximum displacement.
3. Set the adjusting screw against the servo piston by feel before counting turns.
Refer to the table for change per turn. Clockwise rotation decreases displacement, counterclockwise
rotation increases it. Adjustment is possible from zero to maximum.
Approximate displacement change cm
045
5.1 [0.31]
4. After establishing the desired maximum displacement setting, hold the adjusting screw while
torquing the locknut to the value in the table below.
Displacement Limiter Adjustment Data
Frame
Locknut wrench size, torque
Adjusting screw wrench size
5. Test operation of the vehicle/machine to verify proper maximum speed of vehicle/work function.
P104 469E
3 3
[in ] per revolution
053 060
6.0 [0.37] 6.8 [0.41]
045/053
068
7.7 [0.47]
060/068
13 mm, 24 N•m [18 lb•ft]
4 mm
AX152886481964en-000405