Hydraulic System Tests 3. Remove the hydraulic hose from the port (D, Fig. 533) at the base end of the tilt cylinder and cap or plug the hose.
3. Disconnect the hydraulic hose from rod end port (X, Fig. 534) of the lift cylinder to be tested. Cap or plug the hose.
IMPORTANT: Caps/plugs MUST BE able to with-
IMPORTANT: Caps/plugs MUST BE able to with-
stand full hydraulic pressure.
stand full hydraulic pressure.
D X
Fig. 534 – Lift Cylinder Rod End Port
Fig. 533 – Tilt Cylinder Base End Port
4. Connect a hose to cylinder port (D) and place the other end of the hose into a suitable container to allow the hydraulic oil to drain.
4. Connect a hose to the rod end port (X) and run the other end of the hose into a suitable container to allow the oil to drain.
5. Sit in the operator’s seat and start the engine. Have an assistant watch the hose in the container.
5. Sit in the operator’s seat and start the engine. Have an assistant watch the hose in the container.
6. Slightly move the right joystick to the left to slowly tilt the attachment hitch forward. If oil streams into the bucket, the cylinder seals require replacement.
6. Pull the right joystick (ISO pattern controls) back (ISO pattern controls), or push the left joystick to the left (D-H pattern controls) to raise the lift arm and extend both lift cylinders.
7. Remove caps/plugs and reconnect the hydraulic hose to the port (D) on the tilt cylinder base end. Tighten securely.
A small amount of oil will exit the hose initially, but if the seals in the cylinder are worn/damaged and leaking, oil will flow out of the hose. 7. Slowly lower the lift arm and shut off the engine.
Lift Cylinder Internal Leakage Test IMPORTANT: This procedure requires two peo-
8. Remove caps/plugs and reconnect the lift cylinder rod end hydraulic hose removed in step 3.
ple.
1. Lower the lift arm to the ground. 2. Complete the “Mandatory Safety Shutdown Procedure” on page 22.
9. Repeat steps 1-8 for the other lift cylinder.
IMPORTANT: To prevent contamination, ALWAYS clean the area around hydraulic fittings before disconnecting hydraulic hoses or tubes.
Printed in U.S.A.
295
50940165/C0718
