Electric Displacement Control/Hydraulic Displacement Control Neutral Adjustment; Measured Data; Procedure - Danfoss Series 40 M46 Service Manual

Service Manual
Series 40 M46 Variable Pumps
Adjustments

Electric Displacement Control/Hydraulic Displacement Control Neutral Adjustment

24 | © Danfoss | September 2017
opposite direction until the other servo pressure gage indicates an increase in pressure. Note position
of bracket. Rotate neutral bracket half way between the two positions.
5. Holding the neutral adjustment bracket in place, use a 3/8 in. hex wrench to tighten screw (1210).
Torque to 14 N•m [10 lbf•ft].
6. Shut down prime mover and remove previously installed gauges. Plug ports M4, M5. Torque to 37
N•m [27 lbf•ft]
Manual displacement control bracket adjustment
1210
Neutral bracket
With the pump properly plumbed, primed, and mounted on a vehicle or test stand, use this procedure to
adjust the pump displacement control to neutral position. If pump is on a vehicle, block the wheels to
prevent movement.

Measured data

•
Servo pressure at M4
•
Servo pressure at M5
•
Pressure differential between M4 and M5 (optional)

Procedure

1. Attach 20 bar [300 psi] gauge to each servo gage port.
2. Use a 5/32in. internal hex wrench to hold the adjusting screw in place and a 1/2 hex wrench, loosen
locknut.
3. Start prime mover and slowly accelerate to normal opperating rpm.
4. Rotate adjustment screw until one of the servo pressure gages indicates an increase in pressure. Note
position of screw. Rotate adjustment screw in opposite direction until the other servo pressure gage
indicates an increase in pressure. Note position of screw. Rotate adjustment screw halfway between
the two positions.
5. While holding the neutral adjustment screw in place, tighten locknut. Torque to 3 N•m [27 lbf•in].
3/8 in
P106 631E
11026743 | AX00000027en-US0202