5. Activate the control input until pressure in the high side of the system loop stops rising. This pressure
is the PL setting.
6. Return the pump to neutral and adjust the PL setting using an internal hex wrench.
Wrench size is in the diagram on the previous page.
7. Turn the adjusting screw clockwise to increase the PL setting, counter clockwise to decrease it.
The adjustment is very sensitive. Change per turn is 90 bar [1305 psi].
The model code on the serial plate gives the factory setting of the PL (Pressure Limiter). The PL setting
is referenced to charge pressure. Subtract charge pressure from system pressure gauge readings to
compute the effective PL setting.
The model code on the serial plate gives the factory setting of the PL (Pressure Limiter). The PL setting is
referenced to charge pressure. Subtract charge pressure from system pressure gauge readings to
compute the effective PL setting.
8. Repeat steps 4. and 5. until you reach the desired PL setting.
9. After adjustment, torque the locknut (L024) to 12 N•m [9 lbf•ft].
C
Caution
Do not over torque.
10. Shut down the prime mover.
11. Remove gauges and replace plugs.
Engaging the Bypass Function
It is possible to damage the drive motor(s) by operating in bypass mode without charge pressure.
Move the vehicle/machine at a speed not more than 20% of maximum for a duration not exceeding 3
minutes.
Use this procedure to bypass the pump to allow moving the vehicle/machine short distances when you
cannot start the prime mover.
Engaging the Bypass Function
70 N•m
[52 lbf•ft]
P106 651E
HPRV
22 mm
1. To open the HPRVs (L150), rotate three revolutions counterclockwise using a hex wrench.
C
Caution
Do not rotate more than 3 revolutions, leakage will result.
2. Rotate them clockwise until seated to close the HPRVs.
See the following table for torque values:
Service Manual
H1P 045/053/060/068 Axial Piston Single Pumps
Adjustments
38 |
©
Danfoss | June 2020
AX152886481964en-000405