8.6
Pressure tests in the vibration circuit
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8.6
Pressure tests in the vibration circuit
Special tools
Hydraulic test case
!
Caution
Perform measurements at operating tempera-
ture of the hydraulic oil (40 °C).
1. Drive the front drum of the machine on an elastic
base (rubber buffers) (Fig. 1) and block the rear
drum additionally with suitable chocks.
2. Connect a 600 bar pressure gauge to the pres-
sure test port on the vibration valve (Fig. 2).
3. Start the engine and shift the throttle lever to max.
speed position.
4. Switch the vibration on (Fig. 3).
Nominal value:
Start-up pressure = see technical data.
Operating pressure = see technical data
Evaluation of test:
i
Note
If starting pressure is not reached, check the vi-
bration control valve block.
If the starting pressure is reached, but the operat-
ing pressure is too low, you should also check the
leakage quantity of the vibration motors.
If the operating pressure is too high, the bearings
for both vibrator shafts must be checked.
Fig. 1
Fig. 2
Fig. 3
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