Model 6210 Maintenance Manual
Section 4.Scheduled Maintenance Fork Inspection
Fork Inspection
2. Multiply these numbers by 0.005 for maximum allowable deviation.
The following tools are required to perform fork inspection: •
Fork Wear Caliper (P/N 922-369)
•
Tape Measure or Ruler
•
24 in. Framing Square
•
4 ft. Level
Surface Inspection Remove the forks from the carriage. Visually inspect all fork surfaces for signs of damage, including, but not limited to: cracks
•
excessive wear
•
excessive heat
•
deformation
•
unauthorized modifications
• Height of shank _____ x 0.005 = ______ 3. Place a straight edge on the blade of the fork, 2 in. (51 mm) away from the heel of the fork. Measure any deviation and compare to the number calculated in step 2 for length of blade.
Do the following when performing Scheduled Maintenance.
•
• Length of blade _____ x 0.005 = ______
4. Place a straight edge on the shank of the fork, 2 in. (51 mm) away from the heel of the fork. Measure any deviation and compare to the number calculated in step 2 for height of shank. 5. If either maximum deviation number is exceeded, remove the fork from service.
Fork Angle NOTE: This measurement can be done with the forks on or removed from the carriage. 1. Place the fork caliper on the blade. Make sure that the two extruded points are touching the blade of the fork. See Figure 4-3.
Pay special attention to the heel and welds attaching mounting components. If any damage is found, remove the fork from service.
Straightness of Blade and Shank NOTE: This measurement can be done with the forks on or removed from the carriage.
2. Now open and move the caliper so the two extruded points are touching the shank. See Figure 4-3. Figure 4-3.
Fork Angle
ForkArmWearCaliperGuide_2.sv g
Shank
1. Measure the length of the blade and the height of the shank. See Figure 4-2. Figure 4-2.
Measuring Fork Blade and Shank forkFacts1.svg
Indicator Lines Shank
Blade
Blade
Publication: 1146947, Revised: 12 Jan 2017
4-9
