Danfoss H1 P Installation guide

Brand: Danfoss

Model: H1 P

Type: Installation guide

Danfoss H1 P: A high-performance pump designed for demanding hydraulic applications, offering precise pressure control, efficient operation, and reliable performance. With its robust construction and advanced engineering, the Danfoss H1 P ensures exceptional durability and longevity. Its compact design allows for easy installation and maintenance, making it suitable for various industrial and mobile applications. Trust Danfoss H1 P for your hydraulic needs, where precision, efficiency, and reliability are paramount.

CHARGE PRESSURE

RELIEF VALVE REMOVAL

1. Clean pump externally with clean solvent to

remove debris.

2. Using a 24mm wrench, remove the charge

pressure relief valve. (V010)

1. Lubricate the external O-ring (V024) using

petroleum jelly.

2. Install the new charge pressure relief valve.

Using a 24mm socket, torque to 47-57 N•m

[35-42 lbf•ft]

CHARGE PRESSURE

RELIEF VALVE

INSTALLATION

CHARGE PRESSURE

RELIEF VALVE

ADJUSTMENT

1. Install a 50 bar [1000 psi] pressure gage in charge pressure gauge port M3 (next to the adjust-

ment screw). Install a 10 bar [100 psi] gauge at one of the case drain pressure ports L1, L2,

L3, or L4. Operate the system with the pump in neutral (zero displacement) when measuring

charge pressure.

2. The table shows the acceptable pump charge pressure range for some nominal charge relief

valve settings (refer to the model code located on the serial number plate). These pressures

assume 1800 pump rpm and a reservoir temperature of 50°C (120°F), and are referenced to

case pressure.

3. Adjust valve. Clockwise rotation of the adjusting screw increases the setting, and counter-

clockwise rotation decreases the setting (at a rate of approximately 2.7 bar [39 psi] per turn).

4. Torque locknut to 36-44 N•m [26-33 lbf•ft] using a 19mm socket.

5. When desired cha

rge pressure is achieved, remove the gauges and plug the ports.

Charge pressure ranges

Model code Measured charge pressure*

20 bar [290 psi] ± 1.5 bar [21.8 psi]

24 bar [348 psi] ± 1.5 bar [21.8 psi]

26 bar [377 psi] ± 1.5 bar [21.8 psi]

30 bar [345 psi] ± 1.5 bar [21.8 psi]

* This is the actual charge pressure port

gauge reading minus the case pressure

port gauge reading. Factory set at 1800

min

-1

(rpm) with a reservoir temperature

of 50° C (120° F)

Listed pressures assume a

pump speed of 1800 rpm. At

higher pump speeds (with

higher charge ﬂows) the

charge pressure will rise over

the rated settings.

V024

V010

47-57 N•m

[35-42 lbf•ft]

24mm

36-44 N•m

[26-33 lbf•ft]

19mm

Locknut

6mm

Adjusting screw

Charge pressure gauge port M3

0 - 50 bar [0 - 1000 psi]

1/4 inch

20-27 N•m [15-20 lbf•ft]

Case drain port L2

0 - 10 bar [0 - 100 psi]

9/16 inch

96-136 N•m [70-100 lbf•ft]

11139819 • Rev AB • September 2013

Service Kit Instructions

H1 pump charge pressure relief valve

Replacement procedure

Danfoss H1 P Installation guide

Danfoss H1 P Installation guide

Danfoss H1 P Installation guide

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