6. Maintain servo pressure differential between 1-2 bar [14-29 psi] during this step. Slowly thread the
servo cylinder on the M5 side in until the system pressure differential starts to decrease. Continue
turning the servo cylinder in until the system delta pressure results in no machine movement.
System delta pressure (ports MA to MB or MC to MD) between 3-4 bar typically does not cause
machine movement. If service of a pump is not performed on the machine, validation of machine
movement must be checked upon machine start up.
7. Repeat steps 1. to 5. but stroke the pump in the opposite direction by turning the eccentric screw in
the opposite direction, or by supplying current to solenoid C2 to complete setting neutral.
Reverse gauge locations (M4 for M5, MB for MA etc.) from those stated above since the pump is now
stroking the other direction.
8. Set neutral for the rear pump by repeating steps 1. to 6. on the rear pump. Remember that the rear
pump is a mirror image of the front pump and therefore the locations of the servo gauge ports
(M4/M5) and the control solenoids (C1/C2) are opposite.
9. Remove all gauges and replace gauge port plugs.
You can find wrench sizes and plug torques in thePlug Size and Torque Chart on page 77.
Service Manual
H1T 045/053, 060/068 Axial Piston Tandem Pumps
Adjustments
©
Danfoss | September 2020 AX152886481761en-000405 | 55
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