Optional Threshold Adjustment - Hydraulic Proportional Controls - Danfoss H1B 060 Service Manual

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cm3
Adjustments
Optional threshold adjustment – Hydraulic proportional controls
36 | © Danfoss | August 2018
Adjusting threshold on test stand
1. Connect flow meter to A or B system port. Refer to
locations.
2. Connect a variable pressure supply to X1 port (0-50 bar).
Threshold is the pressure at which the motor starts to change from maximum to minimum
displacement.
3. Run prime mover at operating speed.
Threshold adjustment
adjusting
screw
6 mm
4. Adjust control pressure to pressure listed in model code. Note flow reading.
5. If adjustment is necessary, remove nut (B0180). Using a 6mm internal hex wrench, turn adjusting
screw clockwise or counterclockwise until flow starts to change from maximum. Test your adjustment
by lowering the pressure, then increasing the pressure until the displacement starts to change.
Readjust the setting if necessary.
6. When threshold is adjusted correctly, stop prime mover, install nut (B0180), and install motor on
vehicle. Run vehicle and test for proper motor operation.
Adjusting threshold on a machine or test stand without flow meter
1. Install 600 bar [10,000 psi] gauges to ports M5 and M4. Connect a variable pressure supply to X1 port
(0-50 bar).
2. Raise wheels off ground, or disconnect the work function.
W
Warning
Unintended movement of the machine or mechanism may cause injury to the technician or
bystanders. To protect against unintended movement, secure the machine or disable/disconnect the
mechanism while servicing.
3. Run prime mover at operating speed. Stroke the pump to get some rotation of motor shaft.
4. Increase X1 pressure until M4 pressure becomes 1/2 of the M5 pressure. Check the X1 pressure at this
point.
5. If adjustment is necessary, remove nut (B0180). Turn the adjusting screw until the X1 pressure
matches the model code setting.
6. When threshold is adjusted correctly, stop prime mover, install nut (B0180). Run vehicle and test for
proper motor operation.
7. Remove from test stand.
Ports and Gauge Information
Locking nut
(B0180)
19 mm
45 N•m
[32 lbf•ft]
on page 26 for port
AX00000025en-US0504