Section 4.Scheduled Maintenance
Model 6210 Maintenance Manual
Fork Inspection 3. When all four extruded points are in contact with the fork, gently remove the caliper and note the reading on the indicator line, located right above the hinge pin. See Figure 4-3.
Figure 4-4.
Measuring Fork Tip Height Fork Inspection.jpg
Forks
4. If the deviation is greater than 3° of the original angle, remove the fork from service. NOTE: Most forks are manufactured with a 90° angle; therefore, a reading greater than 93° or less than 87° is unacceptable. However, there are some forks that are purposely manufactured to angles greater than or less than 90°.
Level
Fork Tip Height 1. With the truck parked on a level surface and the forks on the carriage, measure the length of the blade. See Figure 4-2. • For forks 42 in. (106.7 cm) or less, max. deviation is 0.25 in. (6.3 mm). • If length of fork is >42 in. (106.7 cm), multiply length of blade by 0.03. Blade length _____in. x 0.03 = _____in. This is the maximum deviation. 2. Elevate the forks approximately 4 ft. (1.2 m) off the floor. 3. Place a 4 ft. level across the tips of the forks. See Figure 4-4. 4. Raise one end of the level to make it level. See Figure 4-4. 5. Measure the distance from the tip of the fork. See Figure 4-4.
Distance from tip of fork
Tips
6. Compare this measurement to the maximum deviation. 7. If the maximum deviation number is exceeded, remove the fork from service.
Positioning Locks (if applicable) 1. With the forks on the carriage, visually inspect the positioning locks for damage. 2. Test the positioning locks to verify they work correctly. 3. If the positioning locks are damaged or do not work correctly, remove the fork from service.
Wear Fork Blade and Shank 1. Remove the forks from the carriage. 2. Approximately half way up the shank, set the front teeth of the jaws of the caliper on the shank. Make sure the caliper is held square across the shank to get an accurate reading. The caliper is now set to measure fork blade wear. Carefully remove the caliper from the shank. See Figure 4-5.
4-10
Publication: 1146947, Revised: 12 Jan 2017
