Maintenance
Hydraulic System
74 9831/3200-3 74
• Never allow the torsional forces transmitted from the hoses to unscrew/screw together the couplings.
• Never use a coupling as a plug.
• Do not connect and disconnect with pressure in the line unless the coupling type is specifically designed
to do so.
Connecting Quick Release Couplings
1. Remove any residual hydraulic pressure trapped in the service line hose.
2. Wipe the two faces of the male and female couplings and make sure they are clean.
3. Make sure that ball in the female coupling is located in one of its slots.
4. Connect the male coupling into the female coupling.
5. Where applicable, rotate the sleeve half a turn and make sure that the locking ball does not align with
the slot.
Figure 46.
C Ball D Slot
E Sleeve
Disconnecting Quick Release Couplings
1. Remove any residual hydraulic pressure trapped in the service line hose.
2. Where applicable, align the slot with ball.
3. Pull back the sleeve to release the coupling.
Oil
Check (Level)
1. Make the machine safe with the platform lowered.
Refer to: Maintenance Positions (Page 58).
2. Look at the hydraulic fluid in the sight hole. If the hydraulic fluid is cloudy, water or air is the system. Water or
air is in the system can damage the hydraulic pump. Contact your JCB dealer if the hydraulic fluid is cloudy.
Refer to: Service Points (Page 61).
3. If necessary, add the recommended hydraulic fluid.
3.1. Open the hydraulic filler cap.
3.2. Use a suitable container to add the hydraulic fluid through the filler port.
3.3. Check the level of hydraulic fluid.
3.4. Close the filler cap.
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