Caterpillar Forklift GP18N

Apply a tester to terminal 1 and terminal 2 and measure the resistance value of the relay coil. Replace the coil with a new one if there is no continuity or the resistance value measured is outside the standard resistance value.

1. Measure the insulation resistance value between terminal 3 and terminal 4. Replace the contact with a new one if the measured insulation resistance value is not more than the value listed in the table below.

2. Apply the tester to terminal 3 and terminal 4.

3. When applying a voltage of 12 V ON and OFF across terminal 1 and terminal 2 under the above condition, check to see if the relay activates to cause continuity or not between terminal 3 and terminal 4. Replace the relay with a new one if it does not activate properly.

CAUTION: This part operates on DC 12 V (Gasoline/Dieselengine truck) power supply.

CAUTION: As the relay has an integrated diode between terminals, be careful about the polarity when inspecting. Replace the relay with a new one if an impact is given to it or if it is dropped.;

(1) Transmission oil level check

(a) Check the transmission fluid level with the level gauge.

(b) Start and run the engine at an idling speed for about 3 minutes, and then stop the engine.

(c) Wait for about 30 seconds after stopping the engine, and check the level.

(d) The checking procedure must be completed within 5 minutes after the engine has stopped.

(a) Warm up the engine to raise the temperature of the transmission oil.

Is the difference in S.G. between any two cells 0.020 or more?

Are there any faulty components, loosely connected cord or corroded connection?

Is the difference in S.G. large?

Has the voltage and S.G. stabilized and remained constant for more than 2 hours?

Is the S.G. adjusted to 1.280 to 1.265?

Is the difference in S.G. more than 0.040 and a low S.G. is found in certain cells only?

Specific gravity reading and state of charge

Measure the resistance value of the relay coil at terminal 3 and terminal 4

Is the measured resistance value within the standard resistance value?

Measure the insulation resistance value between terminal 1 and terminal 2

Is the measured insulation resistance value more than the value listed in the table?

Apply a tester to terminal 1 and terminal 2

Does the relay activate to cause continuity between terminal 1 and terminal 2 when applying a voltage of 12 V ON and OFF across terminal 3 and terminal 4?

Sign off on the glow relay inspection

Steering effort inspection after installation

Upload a photo of the spring scale attached to the steering wheel

Steering effort required to turn the steering wheel

Steering Valve Inspection after disassembly

Check for sliding movement in sub-assembly condition

Check sliding surfaces for defects

If any defect is found, replace the entire unit with a new one