Caterpillar Caterpillar Forklift EC15N EC15N

1. Inspect the body bore cut-in where gears wipe into the body.

2. The body can only be reused if the cut-in is bright and polished in appearance and the depth does not exceed .08 mm.

3. The body should be replaced if the surface is scored, has a matte appearance, or shows signs that the tips of the gears have dug in and torn away the surface material.

4. The body should be inspected to ensure that there is no superficial damage which may adversely affect performance or sealing. Pay particular attention to the port threads and body O-ring seal recesses.

1. The inner surfaces should be inspected to ensure that there is no unusual wear or scoring in the regions where the body O-rings and bush seals contact, which could result in external leakage.

2. Check the shaft seal recess for scoring or damage that could result in oil leakage around the outer diameter of the shaft seal. A replacement shaft seal can be refitted with Loctite hydraulic sealant to overcome slight damage in this area.

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. 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)]

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. 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;