Caterpillar Forklift EC30N

1. Check for oil leaks from the joint between adjacent valve housings sealed by O-ring.

2. Check for oil leaks from the scrapers sealed by O-rings.

3. Check for oil leaks from the screw connections.

It is not practical to check the control valve alone for internal leakage. The correct way to check the control valve in place under normal operating conditions follows.

The internal leakage to be checked includes leakage occurring at the lift spool, tilt spool, tilt lock valve, and check valves.

[Test oil temperature: approx. 50°C (122°F)]

1. Remove the floorplates and the front dashboard cover.

2. Tilt the mast to vertical position, lower the forks all the way, and relieve the pressure in the hydraulic lines.

4. Disconnect the wire leads to the valve switches.

5. Disconnect the hydraulic lines per the listed sequence solenoid, and lower switch.

6. Remove the 3 mounting bolts from the front of the dash.

7. Remove the valve from the truck;

Removal Start By: 1. Disconnect the battery from the truck.

2. Disconnect the hoses attached to the pump fittings.

3. Disconnect the power cables and wire leads from the pump motor.

4. Raise the truck enough to allow the pump and motor assembly to be removed from below the truck. Make sure that the truck is stable and secure in the raised position.

5. Secure the motor from above with a crane, hoist, or other adequate device, or support it at its center with a garage jack.

6. Remove the motor and pump assembly from the truck.

7. Remove the hydraulic fittings from the pump

1. To install, follow the reverse sequence of the disassembly procedure. Before installing hydraulic fittings in the pump, inspect all O-rings for damage or aging and replace them as required.

1. Check the bore wall for wear, grooving, scratch marks, and rusting.

1. Check for deflection in the manner shown.

2. Check for surface flaws such as grooving, scratch marks, rusting, and wear. The rod must be replaced if its threads show signs of stripping or any other damage.

1. Removing hose guard: With the lift bracket raised to the maximum height, remove each hose guard from the front side of the mast.

CAUTION: Be careful not to touch the lift control lever

2. Lowering lift bracket: Lower the lift bracket by carefully operating the lift control lever.

3. Disconnecting high-pressure hoses: Disconnect the high-pressure hoses at the joints indicated by arrows. Use a container to catch oil flowing out of the hoses.

1. Remove the set bolt at the top of each lift cylinder. Lift the inner mast to separate the cylinder rod ends. To lift the inner mast, clove-hitch a sling to the mast with protective wad.

NOTE; The rod end of either lift cylinder is shimadjusted to eliminate the difference in stroke between the cylinders. Before removing the stopper bolts, make a record of the number of shims and the cylinder to which the shims are fitted.