Danfoss H1 P: Your Reliable Hydraulic Pump for Demanding Applications
The Danfoss H1 P pump is a high-performance hydraulic pump designed for demanding applications in various industries. With its robust construction and advanced engineering, this pump delivers exceptional reliability and efficiency.
Key Features:
- Pressure Limiter: Precisely controls system pressure to prevent overpressure and protect your equipment.
- Adjustable Pressure Setting: Allows you to customize the pressure output based on your specific application requirements.
- High-Pressure Capability: Delivers up to 600 bar (10,000 psi) of pressure, making it ideal for high-pressure hydraulic systems.
Danfoss H1 P: Your Reliable Hydraulic Pump for Demanding Applications
The Danfoss H1 P pump is a high-performance hydraulic pump designed for demanding applications in various industries. With its robust construction and advanced engineering, this pump delivers exceptional reliability and efficiency.
Key Features:
- Pressure Limiter: Precisely controls system pressure to prevent overpressure and protect your equipment.
- Adjustable Pressure Setting: Allows you to customize the pressure output based on your specific application requirements.
- High-Pressure Capability: Delivers up to 600 bar (10,000 psi) of pressure, making it ideal for high-pressure hydraulic systems.
REMOVAL OF PRESSURE
LIMITER
1. Clean pump externally with clean solvent to
remove debris.
2. Using a 22 mm wrench, remove the pressure
limiter. (L100)
1. Lubricate the external O-ring (L020) using
petrolium jelly.
2. Install the new pressure limiter. Using a 22 mm
socket, torque to 63-77 N•m [46-57 lbf•ft].
INSTALLATION OF
PRESSURE LIMITER
PRESSURE LIMITER
ADJUSTMENT
To adjust the pressure limiter setting, the motor output shaft must be locked. Lock the vehicle’s
brackes or rigidly fix the work function so it cannot rotate.
1. Install a 600 bar [10,000 psi] pressure gage in the high pressure gauge ports (MA and MB).
Install a 50 bar [1000 psi] pressure gauge in the pump charge pressure gauge port (M3).
22 mm
63-77 N•m [46-57 lbf•ft]
L100
L020
2. Start the prime mover and operate at normal speed.
3. Use a 17 mm wrench to loosen the locking nut,
4. Use a 5 mm internal hex wrench to turn the pressure adjusting screw.
5. The factory preset pressure limiter setting is shown on the model code located on the serial
number plate. It is referenced to charge pressure. The pressure limiter setting is the difference
between the high and low pressure sides of the system loop. Activate the control input so
that pressure increases in the high pressure side of the closed circuit to the pressure limiter
pressure setting. The pressure limiter setting is reached when the pressure stops increasing
and remains steady (as shown on the gauges).
S ystem pressure gauge po rt MB
(on bottom)
5 mm
Pressure limiter
locking nut
17 mm
P104 465E
12 N•m [8.9 lbf.ft]
System pressure gauge po rt MA
0 - 600 bar [0 - 10,000 psi]
1/4 inch
20-27 N•m [15-20 lbf•ft]
0 - 600 bar [0 - 10,000 psi]
20-27 N•m [15-20 lbf•ft}
Charge pressure gauge po rt M3
0 - 50 bar [0 - 1000 psi]
20-27 N•m [15-20 lbf•ft]
HPR V va lv e
Pressure limiter
adjusting screw
1/4 inch
1/4 inch
Warning
Unintended movement of
the machine or mechanism
may cause injury to the
technician or bystanders.
To protect against unin-
tended movement, secure
the machine or disable/
disconnect the machanism
while servicing.
© Danfoss, 2013 BLN-10278 • Rev AC • September 2013 1
Service Kit Instructions
H1 pump
Pressure limiter replacement procedure
PRESSURE LIMITER
ADJUSTMENT
Po rt B
System
pressure
Po rt A
System
pressure
Co unterclockwise rotation
Pressure limiter valves
Co ntrols
Po rt B
Co ntrols
Po rt A
Po rt B
System
pressure
Po rt A
System
pressure
Clockwise rotation
Pr essure limiter valves
Co ntrols
Po rt A
Co ntrols
Po rt B
P106 250E
6.
Return the pump to its neutral (zero flow) position and adjust the pressure limiter setting by
rotating the pressure adjusting screw with the internal hex wrench. Clockwise rotation of the
pressure adjustment screw will increase the pressure setting, and counterclockwise rotation
will decrease the pressure setting. Each complete rotation of the pressure adjusting screw
changes the pressure 150 bar [2176 psi].
7. Verify the pressure setting by actuating the control input so that the pump again developes
pressure in the high pressure circuit. Check pressure difference. Allow the pump to return to
its neutral position. The pressure in the high pressure circuit should return to the charge pres-
sure setting. Repeat step 6 until desired setting is reached.
8. While holding the pressure adjusting screw stationary, torque lock nut to 12 N•m [8.9 lbf•ft].
Do not overtorque.
9. Shut down the prime mover. Remove gauges and install gauge port plugs. Replace the plas-
tic dust plugs (if used).
The pressure limiter setting
must be set at 30-50 bar
[435-725 psi] below the high
pressure relief valve setting.
refer to the pump order code
to find the pressure limiter
valve and high pressure
relief valve option and
setting for your pump.
© Danfoss, 2013 BLN-10278 • Rev AC • September 2013 2
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1
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2
Danfoss H1 P: Your Reliable Hydraulic Pump for Demanding Applications
The Danfoss H1 P pump is a high-performance hydraulic pump designed for demanding applications in various industries. With its robust construction and advanced engineering, this pump delivers exceptional reliability and efficiency.
Key Features:
- Pressure Limiter: Precisely controls system pressure to prevent overpressure and protect your equipment.
- Adjustable Pressure Setting: Allows you to customize the pressure output based on your specific application requirements.
- High-Pressure Capability: Delivers up to 600 bar (10,000 psi) of pressure, making it ideal for high-pressure hydraulic systems.
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