Check oil pressure of hydraulic system for semitrailers

AR55.30-W-0040J

Check oil pressure of hydraulic system for semitrailers

13.09.2016

Model

963, 964 with engine 473.9

with rear cooling system

1

Tester

2

Measuring hose

3

Measurement fitting

 Danger !

Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure.Risk of poisoning from swallowing hydraulic fluid.

Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses.

AS00.00-Z-0013-01A

 Danger !

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A



Check

1

Connect test equipment (1) with measuring hose (2) to measurement fitting (3)

 Measuring hose

*442589009000

 Tester

*625589012100

2

Start engine with engaged parking brake

3

Read off oil pressure at idle speed on test equipment (1)

Hydraulic system oil pressure for semitrailer

*BE55.30-N-1001-01B

4

Switch on hydraulic system for semi-trailer by pressing switch

 The oil pressure rises to operating pressure.

5

Read off oil pressure at idle speed on test equipment (1)

 The operating pressure for the hydraulic system for semi-trailer can be read off on the hydraulic connections label.

Hydraulic system oil pressure for semitrailer

*BE55.30-N-1001-01B

If the oil pressure deviation is too large.



Check hydraulic pump for trailer hydraulics, replace if necessary.

6

Switch off hydraulic system for semi-trailer

7

Switch off engine and disconnect test equipment (1) with measuring hose (2) from measurement fitting (3)

Check values

Number

Designation

Model 963, 964 with engine 473.9
with rear cooling system

BE55.30-N-1001-01B

Hydraulic system oil pressure for semitrailer

at idle speed

Hydraulic system switched off

bar

15

Hydraulic system switched on

bar

250 bzw. 280