CAT Forklift GP20N

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

(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.

The following parts should be periodically changed as noted below.

These parts are made of materials which will deteriorate overtime. Further, it is difficult to determine visually whether or not they are still in good condition. Changing at proper intervals will reduce the risk of injury to the operator and damage to the truck.

4000 service hours or 2 years, whichever comes first:

• Rubber parts of power cylinder

• Hydraulic hoses of steering system

4000 to 8000 service hours or 2 to 4 years, whichever comes first:

(1) With the clearance A between the lining and drum set approximately to specification, pull the cable with spring with a finger as shown. The lever should turn the adjusting screw wheel by one notch and, when the cable is released, return to the original position.

(2) If the lever fails, or is slow, to turn the adjusting screw wheel, check the position of the lever relative to the toothed wheel. The lever’s actuating tip should touch the toothed wheel at approximately 7 to 9 mm (0.28 to 0.35 in.) below the centerline of the screw. If the lever contact is out of the range, the lever will not correctly engage with the toothed wheel, therefore failing or slow to turn the wheel.

(3) If the automatic adjuster fails to operate correctly, take the following actions.

(a) Ensure that the adjusting spring is correctly hooked to the primary shoe.

(d) Replace the adjusting screw.

Inspection after Installation Steering effort

(1) Pull the hand brake lever.

(2) Run the engine to warm the hydraulic oil to an operation temperature of 40 to 60 °C (104 to 140 °F)

(3) Attach a spring scale to the rim (or a spoke) of the steering wheel, and measure the steering effort required to turn the steering wheel clockwise or counterclockwise from the straight-ahead position.

Steering Valve Inspection after disassembly

(1) Check sliding areas between the sleeve and the housing and between the sleeve and the spool.

(a) Check for sliding movement in sub-assembly condition.

(b) If any defective movement is found, check sliding surfaces.

If any defect such as abnormal wear, scratch, burr or rust is found, replace the entire unit with a new one.;