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8.4 Initial start up procedure
Important
• Follow section 2: Safety instructions.
• Make sure the driven system and driven machine is ready to run.
• Warn all personel in the area that the system will be started.
• Never operate the Drive Unit with defective instruments or control elements.
• Keep inflammable materials away from the Drive Unit.
• During start-up period, the hydraulic system will be cleaned from built-in dirt
particles, therefore keep an eye on the filter indicator during the entire start up
procedure.
STEP 1
Immediately before starting
• Check that the prescribed steps in section 8.1: Before commissioning have been
carried out.
• Check fluid level in the tank and refill to the nominal level, see 8.2: Filling up the
system with hydraulic fluid
• Check if any components need filling with clean hydraulic fluid, i.e. motor case.
• Check safety equipment.
• Make sure that all valves on the suction, pressure and inlet side of the pump, as
well as any valves on drain lines, are open.
• Check that cooling water is connected and turned on if a water-oil cooler is used.
• For adjustments and settings on the control system (if any) see special
instruction in attached order specific Hägglunds DUc documentation.
STEP 2
Start with unloaded pump at short intervals
Starting of the Drive Unit shall be carried out with a completely unloaded pump in
short intervals.
Wrong direction of rotation of the pump
Pump will be damaged. System contaminated
▶ Make sure that the pump has the correct direction of rotation. The correct
direction of rotation is marked with a sign placed under the electric motor, see
Fig. 55: Direction of rotation.
Rotating parts!
Risk of injury.
▶ Do not touch rotating parts inside the inspection hole (see Fig. 55: Direction of
rotation.or in the zone of rotating parts.
• When the hydraulic fluid is cold some restarts may be needed to raise the charge
pressure.
• Check the charge pressure level and confirm with data and settings on attached
order specific Hägglunds DUc documentation.
• If OK, the pump may be allowed to come on stroke and introduce flow into the
unloaded hydraulic system. Check that the charge pressure is still OK.
Commissioning | Hägglunds DUc Drive unit
CAUTION
RE 15326-WA, Version 06.2020, Bosch Rexroth AB
59/88
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