Kalmar DRD450-80S4X, Maintenance Manual

Page: 157 / 600

UDRF01.04GB
Maintenance manual DRF 400–450
7 Load handling – 7.2.3 Pressure reducer 9
7.2.3 Pressure reducer
page –
Pressure reducer, checking servo pressure
1 Operate and warm up the machine so that the hydraulic oil
reaches operating temperature, at least 50
°
C.
2 Machine in service position, see section B Safety .
3 Depressurize the hydraulic systems, see section B Safety .
4 Turn the start key to position 0.
5 Connect a pressure gauge (0–25 MPa) to the test outlet on the
pressure reducer.
6 Start the engine and check the servo pressure. Compare with
pressure plate.
Turn the steering wheel or activate a load handling function to
activate the hydraulic oil pumps. The servo pressure is higher
than the stand-by pressure of the hydraulic oil pumps.
7 Depressurize the hydraulic and brake systems, see section B
Safety , Hydraulic and brake systems, depressurizing .
8 Remove the pressure gauge and fit the protective cap on the
pressure check connection.
W A R N I N G
Hot, pressurized oil.
Personal injury, burn injury, rash or irritation.
Always depressurize the hydraulic systems before
starting to work on the hydraulic systems. Avoid
skin contact with the oil, use protective gloves.
MPa MPa
MPa
MPa
MPa MPa
MPa
MPa
MPa
MPa
920643.0024
001029
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