Doosan GC15S-5, Руководство по эксплуатации и техническому обслуживанию

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Maintenance section
95
12 Months Inspection
Forks should be inspected, at a minimum, every 12
months. If the truck is being used in a multi-shift or
heavy duty operation, they should be checked
every six months. See “Forks” in the “2000 Service
Hours or Yearly” in “Maintenance Intervals.”
Maintenance and Repair
1. Repair forks only in accordance with the
manufacturer’s recommendations.
Most repairs or modifications should be done
only by the original manufacturer of the forks or
an expert knowledgeable of the materials,
design, welding and heat treatment process.
2. The following repairs or modifications SHOULD
NOT be attempted.
•
Flame cutting holes or cutouts in fork
blades.
•
Welding on brackets or new mounting
hangers.
•
Repairing cracks or other damage by
welding.
•
Bending or resetting.
3. The following repairs MAY be performed.
•
Forks may be sanded or lightly ground, to
remove rust, corrosion or minor defects from
the surfaces.
•
Heel sections may be ground with a carbon
stone to remove minor surface cracks or
defects. Polish the inside radius of the heel
section to increase the fatigue life of the
fork. Always grind or polish in the direction
of the blade and shank length.
•
Repair or replace the positioning locks on
hook type forks.
•
Repair or replace most fork retention
devices used with other fork types.
4. A fork should be load tested before being
returned to service on completion of repairs
authorized and done in accordance with the
manufacturer’s recommendations.
Most manufacturers and standards require the
repaired fork to be tested with a load 2.5 times
the specified capacity and at the load center
marked on the fork arm.
With the fork restrained in the same manner as
its mounting on the lift truck, apply the test load
twice, gradually and without shock. Maintain
the test for 30 seconds each time.
Check the fork arm before and after the second
application of the test load. It shall not show
any permanent deformation.
Consult the fork manufacturer for further infor-
mation as may be applicable to the specific fork
involved.
Testing is not required for repairs to the
positioning lock or the markings.