1. Using a 5 mm internal hex wrench, remove the six cap screws (D250)
2. Remove the control module and gasket (D150) and discard the gasket.
3. If necessary, remove orifices (F100) using a 3 mm internal hex wrench.
Tag and number the orifices for reinstallation.
4. If screen (D084) is clogged, use a hook to remove retaining ring (D098) and screen.
5. Remove and discard screen (D084).
EDC Control Installation
Inspect the machined surfaces on the control and top of the pump. If you find any nicks or scratches,
replace the component.
Ensure you install dowel pins (D300) in housing before installing control.
1. Install a new gasket (D150).
2. If you removed screen (D084), install a new one with the mesh facing outward.
Remove plug on top of control to ensure the swashplate feedback pin is properly positioned in the
center of the control module when installing control.
Proper screen orientation
P106 618E
D084
D084
Incorrect screen
orientation
Correct screen
orientation
3. If previously removed, install orifices using a 3 mm internal hex wrench and torque to 2.5 N•m [1.8
lbf•ft].
4. Install the control module and six cap screws (D250).
5. Using a 5 mm internal hex wrench, torque the cap screws (D250) to 13.3 N•m [9.8 lbf•ft].
Torque sequence
2
3
4
5
6
1
Control Solenoids Repair
1. Disconnect electrical connection and remove the three cap screws (D050) using a 4 mm internal hex
wrench.
2. Remove the solenoid (D025) and O-ring (D025A). Discard the O-ring.
3. If necessary, remove the coil using a 12 point 26 mm socket.
Inspect the machined surfaces on the control and top of the pump. If you find any nicks or scratches,
replace the component.
4. Lubricate new O-ring (D025A) using petroleum jelly and install.
Service Manual
H1P 069—H1P 280 Axial Piston Single Pumps
Minor Repair
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©
Danfoss | January 2021
AX152886482551en-000601