Table 2-1. Troubleshooting-Continued

Table 2-1. Troubleshooting-Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2. Check power steering pump pressure.

If pressure is less than 900-1100 psi (63. 2 - 77. 3 kg/cm' ) repair or replace pump.

Step 3. Check for defective steering valve.

Repair or replace defective steering valve.

12.

STEERING WHEEL ROTATES CONTINUOUSLY.

Step 1. Check for dirt in hydraulic system.

Drain, flush and refill system if necessary (LO10-3930-631-12).

Step 2. Check for defective steering valve.

Repair or replace defective steering valve.

13.

CARRIAGE DOES NOT LIFT OR LOWER WHEN ACTUATED.

Step 1. Check for defective control valve switch.

Replace defective switch.

Step 2. Check hydraulic pump motor operation.

Repair or replace motor if not operating.

Step 3. Check hydraulic pump for proper operation.

Repair or replace hydraulic pump if not operating properly.

Step 4. Check for damaged or defective hydraulic lift cylinders.

Repair or replace damaged or defective cylinders.

Step 5. Check for damaged or defective mast assembly.

Repair or replace defective or damaged mast assembly.

Step 6. Check for damaged or defective control valve.

Repair or replace damaged or defective control valve.

14.

MAST DOES NOT TILT WHIEN ACTUATED.

Step 1. Check for defective control valve switch.

Replace defective switch.

Step 2. Check hydraulic pump motor operation.

Repair or replace motor if not operating.

Step 3. Check hydraulic pump for proper operation.

Repair or replace pump if not operating properly.

Step 4. Check for damaged or defective tilt cylinders.

Repair damaged or defective tilt cylinders.

Step 5. Check for damaged or defective control valve.

Repair or replace damaged control valve.

15.

CARRIAGE DOES NOT SIDE SHIFT WHEN ACTUATED.

Step 1. Check for defective control valve switch.

Replace defective control valve switch.

Step 2. Check hydraulic pump motor operation.

Repair or replace motor if not operation.

Step 3. Check hydraulic pump for proper operation.

Repair or replace pump if not operating properly.

Step 4. Check for damaged or defective side shift cylinder.

Repair defective side shift cylinder.

Step 5. Check for damaged or defective side shift carriage.

Repair damaged or defective carriage.

Step 6. Check for damaged or defective control valve.

Repair or replace damaged or defective control valve.

Note. Tests and inspections of the electrical control components are covered in Chapter 9, Section II.

Section III. GENERAL MAINTENANCE

stopped by this operation. This is for the protection of all

2-5. General

maintenance personnel. After disconnecting battery

a. As the fork lift truck is electrically powered,

receptacle, turn on master switch and depress horn

certain precautions must be followed.

button to discharge capacitors.

b. The principal caution to observe is disconnection

of the battery receptacle before attempting any repairs to

the electrical system. All electrical current to the vehicle

components is

2-3