7. Remove gages and replace plugs (M3, L1/L2). Using an 11/16 in. hex wrench, torque plug (M3) to 37
N•m [27 lbf•ft]. Using a 9/16 in. internal hex wrench, torque plug (L1/L2) to 115 N•m [85 lbf•ft].
Charge pressure adjustment
P106 634E
103
105
104
101
102
1 in.
M3
11/16 in
Charge pressure
gage port
Engaging the bypass function
Test the bypass function with the pump installed on the machine. The bypass function is engaged by
unscrewing the bypass valve. Do not open the bypass valve when the machine is operating.
1. To engage the bypass function, use a 5/8 in. hex wrench to unthread the bypass valve.Rotate the
bypass valve approximately three turns counterclockwise. Do not rotate more than 3 revolutions:
additional rotation permits external leakage.
2. To close the bypass valve, rotate the bypass valve clockwise until seated. Torque to 20 N•m [15 lbf•ft].
3. Vehicle/machine should move with bypass valve open. Close valve for normal operation.
C
Caution
Bypass valve is not a tow-valve. Damage to pump and motor is possible when operating without
charge pressure. Limit speed of movement to 20% of the vehicle/machine’s maximum for no longer
than 3 minutes.
Service Manual
Series 40 M46 Variable Pumps
Adjustments
©
Danfoss | September 2017
11026743 | AX00000027en-US0202 | 19