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HYDRAULIC PRESSURE SETTINGS
CASE TRAINING CENTER
AUGUST 2000
Pilot system secondary relief valve
(H)
Test
1. Connect a 0-100 bar pressure gauge to pressure
test point P3.
2. With the engine at full speed, select mode "S".
3. Move the pilot cancellation lever to its low
position.
4. With the swing and travel attachment controls in
neutral, read the value on the pressure gauge:
The value should be 39±1 bar (3.9±0.1 MPa).
Adjustment
1. Loosen the lock nut and turn the valve adjusting
screw (H) until 39±1 bar (3.9±0.1 MPa) is
reached.
2. Tighten the lock nut while holding the adjusting
screw in position.
3. When the adjusting screw has been tightened,
check the pressure again and make sure there are
no leaks.
Checking the pilot accumulator
Raise the boom completely and extend the dipper.
Shut down the engine, with the starter key switch on
"ON".
Operate the boom lowering or dipper retracting control
several times consecutively.
The pressure in the accumulator should enable the
boom lowering or dipper retracting function to be
performed about six times.
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