1. Loosen the locknut (E550).
Lock nut wrench size is 13 mm and torque is 23 N•m [17 lbf•ft] (for all tandem pumps).
2. Rotate the adjusting screw (E450).
Adjusting screw wrench size is 4 mm. Rotating the adjusting screw clockwise decreases the maximum
displacement of the pump while rotating the adjusting screw counterclockwise increases the
maximum displacement.
3. After establishing the desired maximum displacement setting, hold adjusting screw in place and
tighten the locknut.
Refer to the table for change per turn. Clockwise rotation decreases displacement, counterclockwise
rotation increases it. Adjustment is possible from zero to maximum.
Caution
Be sure servo cylinder does not rotate when displacement limiter locknut (E550) is torqued.
Approximate displacement change per revolution of adjusting screw
Unit 045 053 060 068
cm
3
[in
3
] 5.1 [0.311] 6.0 [0.366] 5.9 [0.360] 6.6 [0.403]
Service Manual
H1T 045/053, 060/068 Axial Piston Tandem Pumps
Adjustments
©
Danfoss | September 2020 AX152886481761en-000405 | 49
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