7 - 18
HYDRAULIC PRESSURE SETTINGS
CASE TRAINING CENTER
AUGUST 2000
CS99B580
A: Locking pin
B: Forward
5. Lock the travel on the side to be checked by
positioning the locking pin between the sprocket
and the undercarriage as shown above.
6. With the engine at full speed, select mode "S".
7. Operate the travel control of the hydraulic motor to
be checked and measure the quantity of oil which
leaves the drain during 1 min.
8. Repeat Steps 1 to 7 to check the other motor.
9. Compare the quantities of oil collected; if the
difference between the two motors is greater than
1 L/min, repair or change the which has output the
greatest quantity of oil.
NOTE: The maximum is about 5 L/min per motor.
Checking the swing motor for leaks
Tools required
1 receptacle with a capacity of 10 litres
1 hose
1 plug
Checking for leaks
(With the hydraulic oil between 45 and 55°C)
1. Disconnect the swing solenoid valve connector
(green).
2. Display the diagnostic screen "CHK1".
3. Start the engine and select the mode "S".
4. Switch on the swing brake control on the
instrument panel (indicator lamp ON).
5. Slowly operate the swing control lever and
gradually increase the engine speed to full speed
to ensure that the swing is locked.
6. Shut down the engine.
7. Press the breather to release pressure in the
hydraulic reservoir.
CD00E192
8. Disconnect the hydraulic motor drain hose and
plug it.
9. Use a hose to connect the drain port to the
receptacle.
10. Start the engine at full speed in mode "S", operate
the swing control to right or left and measure the
quantity of oil which flows out of the drain hole
during 1 min.
11. Since the quantity of oil can vary depending on
the test point used, repeat the measurement (Step
10) with the upperstructure at 90°, then at 180°.
NOTE: The maximum permitted is about 4 L/min.
A
B
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