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17
INSPECTION
WARNING
• All new, altered or modified equipment should be
inspected and tested by personnel instructed in safety,
operation and maintenance of this equipment to ensure
safe operation at rated specifications before placing
equipment in service.
• Never use a hoist that inspection indicates is damaged.
Frequent and periodic inspections should be performed on
equipment in regular service. Frequent inspections are
visual examinations performed by operators or personnel
trained in safety and operation of this equipment and
include observations made during routine hoist operation.
Periodic inspections are thorough inspections conducted by
personnel trained in the safety, operation and maintenance
of this equipment.
The states inspection intervals depend upon the nature of
the critical components of the equipment and the severity of
usage. The inspection intervals recommended in this
manual are based on intermittent operation of the hoist
eight hours each day, five days per week, in an environment
relatively free of dust, moisture and corrosive fumes. If the
hoist is operated almost continuously or more than the eight
hours each day, more frequent inspections will be required.
Careful inspection on a regular basis will reveal potentially
dangerous conditions while still in the early stages,
allowing corrective action to be taken before the condition
becomes dangerous.
Deficiencies revealed through inspection, or noted during
operation, must be reported to designated personnel
instructed in safety, operation and maintenance of this
equipment. A determination as to whether a condition
constitutes a safety hazard must be made, and the correction
of noted safety hazards accomplished and documented by
written report before placing the equipment in service.
Records and Reports
Inspection records, listing all points requiring periodic
inspection should be maintained for all load bearing
equipment.
Written reports, based on severity of service, should be
made on the condition of critical parts as a method of
documenting periodic inspections. These reports should be
dated, signed by the person who performed the inspection,
and kept on file where they are readily available for review.
Load Chain Reports
Records should be maintained documenting the condition
of load chain removed from service as part of a long-range
load chain inspection program. Accurate records will
establish a relationship between visual observations noted
during frequent inspections and the actual condition of the
load chain as determined by periodic inspection methods.
Frequent Inspection
On hoists in continuous service, frequent inspections should
be made by operators at the beginning of each shift. In
addition, visual inspections should be conducted during
regular service for any damage or evidence of malfunction.
1. OPERATION. Check for visual signs or abnormal noises
(grinding, etc.) which could indicate a potential
problem. Make sure all controls function properly and
return to neutral when released. Check chain feed
through the hoist and bottom block. If chain binds,
jumps, is excessively noisy or "clicks," clean and
lubricate the chain. If the problem persists, replace the
chain. Do not operate the hoist until all problems have
been corrected.
2. UPPER AND LOWER LIMIT DEVICE. Test operation
with no load slowly in both extremes of travel. Upward
travel must stop when the stop buffer on the bottom
block hits hoist limit switch. Downward travel must
stop when the stop buffer attached to the end of the
unloaded load chain decreases and activates the limit
switch.
3. HOOKS. Check for wear or damage, increased throat
width, bent shank or twisting of hook. Replace hooks
which exceed the throat opening discard width or which
exceed a 10° twist. If the hook latch snaps past the tip of
the hook, the hook is sprung and must be replaced.
Check hook support bearings for lubrication or damage.
Ensure that they swivel easily and smoothly.
4. HOOK LATCH. Make sure hook latch is present and
operating. Replace if necessary.
CAUTION
• Do not use hoist if hook latch is missing or damaged.
5. CONTROLS. During operation of the hoist, verify that
response to pendant is quick and smooth. See that the
controls return to neutral when released. If hoist responds
slowly or movement is unsatisfactory, do not operate the
hoist until all problems have been corrected.
6. AIR SYSTEM. Visually inspect all connections, fittings,
hoses and components for indication of air leaks. Repair
any air leaks found. Check and clean the filter.
7. LOAD CHAIN. Examine each of the links for bending,
cracks in weld areas or shoulders, traverse nicks and
gouges, weld splatter, corrosion pits, striation (minute
parallel lines) and chain wear, including bearing surfaces
between chain links. Replace a chain that fails any of the
inspections. Check chain lubrication and lubricate if
necessary. Refer to "Load Chain" in the "LUBRICATION"
section.
NOTICE
• The full extent of load chain wear cannot be
determined by visual inspection. At any indication of
load chain wear, inspect the chain and chain wheel in
accordance with instructions in "Periodic Inspection."
8. LOAD CHAIN REEVING. Ensure welds on standing
links are away from load sheave. Reinstall chain if
necessary. Make sure chain is not capsized, twisted or
kinked.