Maintenance
137
C3M2-OM-EN-02
Tip
Shank
Blade
Heel
Positioning
Lock (If Fitted)
Hook
Hook
Fork Overview
Straightness of Blade and Shank
Check the straightness of the upper face of each blade and the front face of each
shank. If the deviation from straightness exceeds 0.5% of the length of the blade and/or
the height of the shank, respectively withdraw the fork from service.
!
Cracks
Visually examine the forks for surface cracks. Pay special attention to:
Fork heel
Welds that attach mounting components to the fork blank
Forks with surface cracks should not be returned to service.
Fork Angle
Check the angle between the front vertical face of each fork and the load face of each
shank. If the deviation exceeds 3° from the original specification withdraw the fork from
service.
Difference in Height between Fork Tips
Check the difference in height between tips of the forks with the forks mounted on the
fork carriage. If the difference in tip heights exceeds 3% of the length of the blade, the
forks should be removed from service.
Positioning Lock (If Applicable)
Check the positioning lock on each fork to make sure it functions properly. If any
problems are noted, repair or replace the fork.
Forks on trucks with optional hydraulic fork positioning do not have positioning locks.
Wear
Two different areas of the fork and fork attachment should be checked for wear.
Fork Blade and Shank – Check each fork blade and shank for wear, pay
special attention to the area surrounding the heel of the fork. If the thickness is
reduced to 90% of the original thickness, remove the fork from service.
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