Brake Oil Pump - Kalmar DRF420-60S5 Maintenance Manual

8
page –
UDRF01.04GB
4 Brakes – 4.3.1 Brake oil pump
4.3.1
Brake oil pump, checking
Hot, pressurized oil.
Personal injury, burn injury, rash or irritation.
Always depressurize the hydraulic systems before
starting to work in the hydraulic systems. Avoid
skin contact with the oil, use protective gloves.
1 Operate and warm up the machine so that the oil in the brake
system reaches operating temperature, at least 50 °C.
2 Machine in service position, see section B Safety
3 Depressurize the brake and hydraulic systems, see section B
Safety.
4 Connect a pressure gauge (0–25 MPa) to the test outlet for
pump pressure on the accumulator charging valve.
5 Start the engine and let it idle.
6 Close the drain valve on the accumulator charging valve and
check the pump pressure during charging.
During charging, the pressure should increase to 19±0.5 MPa
before the accumulator charging valve switches to cooling.
When the accumulator charging valve shifts to cooling, the
pressure drops.
7 Check the pressure during cooling.
During cooling the pressure should be max. 1–1.5 MPa at
max. engine rpm.
8 Turn off the engine.
9 Depressurize the brake and hydraulic systems, see section B
Safety, Hydraulic and brake systems, depressurizing.
10 Remove the pressure gauge and fit the protective cap on the
pressure check connection.
11 Close the drain valve on the accumulator charging valve.
Maintenance manual DRF 400–450
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Brake oil pump

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