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6.2.2 Hook Inspection
Hooks damaged from chemicals, deformations, cracks or which have a 10° twist from the hook’s unbent
plane must be replaced.
If the throat of the hook is deformed or has excessively opened enough to allow the latch to not engage with
the tip of the hook correctly, it must be replaced. Any hook that is twisted or has excessive opening indicates
abuse or overloading of the unit. Inspect other load sustaining parts, hook block screws, load pins and chain
block body for damage.
Check and inspect that the spring latch is not damaged or bent and that it operates properly with sufficient
spring pressure to keep the latch tightly closed against the tip of the hook and allow the latch to spring back
to the tip when released.
If the latch does not operate properly, it should be replaced. The check on the max hook opening allowed
see drawings and dimensions below.
6.2.3 Chain Bag Inspection
Chain bags should be inspected for signs of excessive wear and tear to the fabric of the bag and the
attachment loops. Damaged bags shall be replaced at all times.
Chain bags shall be filled to a maximum of 75% .
Chain bags shall be suspended by Quicklinks or Carabiners made according to DIN 56927 or equivalent
standard. They shall have a 5:1 safety factor as suitable for overhead suspension. Some bags are supplied
with a suitable rated captive spring hook. Only rated hooks supplied by RWM should be used.
Any attaching devices should also be inspected. Danged or worn devices should be discarded immediately
and replace.
6.3
PERIODICAL CONTROLS
The hoist must be tested as often as deemed necessary, based on usage logs, or at least once a year.
Testing should be carried out by an authorised expert. In case of heavy services or intensive use, the user
must carry out additional extraordinary testing based on his own risk evaluation. Periodic testing must be
carried out by the authorised RWM maintenance service engineer.
Testing shall consist of lifting a dynamic load in order to test the functioning and setting of the slip clutch and
the brake.
In addition, the slipping properties of the clutch and brake can be affected by, but not limited to, the position
of the pocket wheel, operation in extreme temperatures (above 65dgr. Celsius or below -10dgr. Celsius),
humidity or fluctuations in the friction material. This could lead different values of the clutch setting as seen
on the initial test report.
The clutch settings of the EXE RISE hoist are set at 120% of the nominal load to meet the German
standards for the use of hoists above people. Due to the nature of the clutches and the above conditions,
these settings can vary easily by +/- 10%... The testing shall be performed with a suspended load of 120% of
the maximum WLL. Other countries may have different regulations. However, clutch settings shall remain in
between 110% and 160% at all times (EN14992-2).
