Hc Edc Control; Control Neutral Adjustment - Danfoss Series 40 M46 Service Manual

Service Manual
Series 40 M46 Variable Pumps
Adjustments

HC EDC Control

© Danfoss | September 2017
6. Stop prime mover and remove previously installed gauges. Plug ports M4, M5. Torque to 37 N•m [27
lbf•ft]
EDC / HDC control adjustment

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.
Adjustment screw
5/32 in
Lock nut
9/16 in
P106 643
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