Danfoss H1 P Installation guide

Brand: Danfoss

Model: H1 P

Type: Installation guide

Danfoss H1 P pump offers reliable performance and precise control in various applications. With its advanced design, it ensures efficient operation and extended service life. The pump's robust construction and high-quality components make it suitable for demanding hydraulic systems. It provides accurate pressure regulation and efficient flow management, meeting the requirements of diverse industrial applications.

CHARGE PRESSURE

RELIEF VALVE REMOVAL

1. Clean pump externally with clean solvent to

remove debris.

2. Using a 1 inch wrench, remove the charge

pressure relief valve. (V10)

1. Lubricate the external O-rings using petroleum

jelly.

2. Install the new charge pressure relief valve.

Using a 1 inch socket, torque to 41-47 N•m [30-

35 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.

4. Torque locknut to 10 N•m [88.5 lbf•in] using a 3/4 inch socket.

5. When desired charge p

ressure 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.

V10

41-47 N•m

[30-35 lbf•ft]

1 inch

Adjusting screw

1/4 inch

Locknut

3/4 inch

Case drain port L2

10 N•m

[88.5 lbf•in]

0 - 10 bar [0 - 100 psi]

95-136 N•m [70-100 lbf•ft]

Charge pressure gauge port M3

0 - 50 bar [0 - 1000 psi]

20-27 N•m [15-20 lbf•ft]

1/4 inch

9/16 inch

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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