13. Check for proper fluid level in the reservoir.
14. Increase engine speed to normal operating rpm to further purge residual air from the system, when
adequate charge pressure is established (as shown in model code).
15. Shut off the engine.
16. Connect pump control signal.
17. Start engine, checking to be certain pump remains in neutral. Run engine at normal operating speed
and carefully check for forward and reverse control operation.
18. Continue to cycle between forward and reverse for at least five minutes to bleed all air and flush
system contaminants out of the system loop.
Normal charge pressure fluctuation may occur during forward and reverse operation.
19. Check that the reservoir is full and remove charge pressure gauge.
The pump is now ready for an operation.
Service Manual
H1P 069—H1P 250 Axial Piston Single Pumps
Initial Startup Procedures
©
Danfoss | September 2020 AX152886482551en-000504 | 29
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