2. Straightness of fork blade and fork back: Verify the straightness of the upper fork
blade side and the fork back front. If the deviation from a straight line is more
than 0.5% of the fork blade length and/or the fork back height, the fork must not
be commissioned again until it has been appropriately repaired.
3. Fork angle (between the top of the fork blade and the fork back side facing the
load): Every fork deviating by more than 3 degrees from the genuine specifica-
tion must not be recommissioned. The rejected fork must be realigned and
tested.
4. Difference in fork tip height: Verify the height difference of a fork pair attached to
the fork carriage. If the fork tip height difference is more than 3% of the fork
blade length, the fork must not be commissioned again until it has been appropri-
ately repaired.
5. Position lock (if present in the original configuration): Check that the position lock
is in the proper condition and functions correctly. If any fault has been detected,
the fork must not be commissioned again until it has been appropriately
repaired.
6. Wear:
– Fork blade and fork back: Fork blade and fork back, in particular the area of the
fork stop must be thoroughly inspected for wear. The fork must not be commis-
sioned again if the thickness is less than 90% of the original thickness (fork
back).
– Position hook (if present in the genuine configuration): The load-bearing sur-
face of the upper hook and the retaining surfaces of both hooks must be in-
spected for wear, cracks or other local deformations. In case of deformations
resulting in too great a play between fork and fork carrier, the fork must not be
commissioned again until it has been appropriately repaired.
7. Legibility of marking (when originally provided): If the fork marking is not clearly
legible, it shall be renewed per instructions from original supplier.
Repair and inspection:
– Repair: The decision whether or not a fork may be repaired for further use and the
repair itself are restricted to the fork manufacturer or an expert of equivalent com-
petence. Repair of superficial cracks or wear by forging is not recommended. Nec-
essary repairs requiring a realignment must be followed by the stipulated
appropriate heat treatment of forks.
– Test load: After repair, except the repair or replacement of the position lock and/or
the identification plate, a fork may be commissioned again only if it has been suc-
cessfully subjected to the manufacturer tests as per ASME B56.1-2003; however,
the test load must be the capacity as indicated on the fork.
G 5