Displacement Limiter Adjustment Data (continued)
Displacement Locknut wrench size and
torque
Adjusting screw
wrench size
Approximate displacement change per
revolution of adjusting screw
210
22 mm - 80 N•m [59 lbf-ft]
6 mm
17.4 cm
3
/turn [1.06 in
3
/turn]
250
22 mm - 80 N•m [59 lbf-ft]
6 mm
20.7 cm
3
/turn [1.26 in
3
/turn]
Control Neutral Adjustment
All functions of the Electric Displacement Control (EDC), are preset at the factory. If necessary, adjust the
pump to neutral with the pump running on a test stand or on the vehicle/machine with the prime mover
operating. If adjustment fails to give satisfactory results, you may need to replace the control or coils. See
Minor repair for details.
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.
1. Install a 50 bar [1000 psi] gauge in each of the two servo gauge ports (M4 and M5). Disconnect the
external control input (electrical connections) from the control. Start the prime mover and operate at
normal speed.
2. Use a 4mm internal hex wrench to hold the neutral adjusting screw (D015) stationary while loosening
the locknut (D060) with a 13mm wrench.
3. Observe pressure gauges. If necessary, turn adjusting screw (D015) to reduce pressure differential.
EDC adjustment is very sensitive. Be sure to hold the hex wrench steady while loosening the locknut.
Total adjustment is less than 120 degrees.
Control Adjustment
Locknut 13 mm
Adjusting screw
4 mm
P104 970
12 N•m [9 lbf•ft]
Servo pressure gauge port M5
Servo pressure gauge port M4
0 - 50 bar [0 - 1000 psi]
1/8 in
5 N•m [4 lbf•ft]
0 - 50 bar [0 - 1000 psi]
1/8 in
5 N•m [4 lbf•ft]
4. Rotate the neutral adjusting screw (D015) clockwise until the pressure increases on the gauge. Note
the angular position of the wrench. Then rotate the neutral adjusting screw counterclockwise until
the pressure increases by an equal amount on the other gauge. Again note the angular position of
the wrench.
Service Manual
H1 Pumps 069/078, 089/100, 115/130, 147/165, 210/250
Adjustments
36 |
©
Danfoss | May 2018
520L0848 | AX00000087en-US0308