Model 6210 Maintenance Manual
Section 4.Scheduled Maintenance Fork Inspection
Figure 4-5.
Measuring Fork Shank Fork Inspection.jpg
If there is greater than 10% wear of the fork arm, the fork has at least a 20% reduction in capacity. NOTE: The caliper is designed to measure forks up to 4 in. (100 mm). It is not to be used on full or lumber tapered forks. For these forks, you must know the original fork blade thickness and take a measurement of the fork arm thickness. If the difference in the measurement exceeds 10% of the original thickness, the fork must be removed from service. Fork Hooks 3. Measure 2 in. (50 mm) out from the heel of the fork. 4. Place the caliper over the flanks of the fork arm blade at this 2 in. (50 mm) point. See Figure 4-6. Figure 4-6.
Measuring Fork Blade Wear Fork Inspection.jpg
1. Remove the forks from the carriage. 2. Determine the fork mounting class. a. Measure the height of the carriage or the distance between the hooks. See Figure 4-7. Figure 4-7.
Determining Fork Mounting Class Fork Inspection.jpg
Distance between hooks
Carriage Height
b. Compare this measurement to the table below.
5. If the inside teeth of the caliper hit the fork, there is <10% wear. If the inside teeth pass freely over the fork arm, there is >10% wear and the fork must be removed from service.
Publication: 1146947, Revised: 12 Jan 2017
Fork Mounting Class
Distance Between Hooks in. (mm)
Carriage Height in. (mm)
1
12.05 (306)
13 (331)
2
15.04 (382)
16 (407)
3
18.78 (477)
20 (508)
4-11
