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Hägglunds Fusion Drive system
| Commissioning
Bosch Rexroth AB, RE 15345-WA Version 11.2022,
STEP 5
Check:
•
Unusual noises or vibrations.
•
Function of the safety equipment.
•
Temp in tank and closed loop. Check also that the cooler control is stable. If not,
investigate water supply, controls, air-oil cooler, etc.
•
Leakage points.
• Pump compensator pressure control and pressure sensors. At delivery, these
pressure levels are set according to the order specific hydraulic diagram and
normally no readjustment will be necessary. Pump compensator pressure can be
checked by closing the valve on the high pressure leg and stroke the pump until
the pressure is indicated on the control system display or on an optional gauge.
STEP 6
After test
•
Correct any faults discovered at the points above.
•
Check the filter indicator. It might be necessary to change filter elements due
to particles from the piping. When changing filter elements carefully follow the
instructions in
to avoid dirt into the system. If there still is dirt
in the system, additional flushing is necessary in order to prevent premature
failure of system components.
•
Check all connections, screws etc. and tighten if necessary.
8.4 Pump settings and adjustments
8.4.1 Variable displacement pump
Charge pressure level, high pressure relief valves and pressure compensator are
set from factory and there is normally no need for readjustment. Always check the
pressure levels in the attached order specific Hägglunds Fusion documentation.
Setting of pressures on the pump must be performed by skilled service personnel
familiar with the functions and risks involved with the pump. The pressures
shall be set during operation of electric motor and with the system at operating
temperature. Note that pressures can change with different viscosities
1. Checking and adjust charge pressure
Carry out checking and adjustment at operating temperature. The charge
pressure shall be measured at port G.
Size 28 - 56
Note!
If the checked values differ from the original settings, please contact your
Bosch Rexroth representative in terms of adjusting the settings
Size 71 -125
To adjust the charge pressure the pump shall be in neutral position (zero
displacement). Release the lock nut, and adjust the charge pressure to the
necessary level by turning the setting screw. The charge pressure shall normally
be set to 25 bar (363 psi)
