Periodic Inspections; Hook Inspection - Columbus McKinnon CM 653 Serie Manual Del Equipo

INSPECT HOIST
Before each use and at specified intervals
as directed in the inspection section.
use as directed above. Failure to do so
may cause injury to you or others.
1. DO NOT exceed capacity shown
on nameplate.
2. DO NOT use to lift people or
loads over people.
3. DO NOT use unless the hoist's
frame and chain form a straight
line between hooks.
4. DO NOT use if the frame is in
contact with any object.
5. DO NOT use if the unit is damaged
or malfunctions.
6. DO NOT use extension on lever.
use hand power only.
7. DO NOT use if chain is twisted,
kinked or damaged.
MAINTENANCE
INSPECTION
To maintain continuous and satisfactory
operation, a regular inspection
procedure must be initiated so that
worn or damaged parts can be
replaced before they become unsafe.
The intervals of inspection must be
determined by the individual application
and are based upon the type of service
to which the hoist is subjected. The
intervals indicated as follows are based
on normal service.
The inspections are divided into two
general classifications designated as
"frequent" and "periodic".
FREQUENT INSPECTIONS
These inspections are usually visual
examinations by the operator. Frequent
inspections are to be performed daily or
before each use and they are to include:
1. Braking mechanism for evidence
of slippage.
2. operation of the directional lever
for free movement.
3. Load chain for lubricant, wear,
damaged links or foreign material.
4. Hooks for damage, cracks, twists,
latch engagement and latch operation.
SERIES 653

PERIODIC INSPECTIONS

These are visual inspections of external
and internal conditions by a designated
person making records to provide the
basis for continuing evaluation of the
condition of the hoist. The periodic
inspection should include those items
listed under frequent inspection as well
as the following:
1. Chain for excessive wear or stretch
(See Figures 6 and 7, page 6).
2. Worn, cracked or distorted parts such
as lower hook block, upper hook
block, upper hook pin, chain guide
rollers, bushings, lever, brake cover,
free chaining knob, directional pawl,
friction hub and lever ratchet.
3. inspect for wear on the tip of the
pawls, teeth of the ratchet, and
pockets of the liftwheel.
4. Loose or missing bolts, nuts,
pins or rivets.
5. inspect the brake components for
worn, glazed or contaminated friction
discs and scoring of the friction hub
and ratchet. Replace friction washers
if contaminated, glazed or if thickness
is less than 0.094 in. (2.4 mm).
6. Corroded, stretched or broken
pawl springs, directional lever
pawl spring and lever ratchet spring.
7. Hooks - dye penetrant, magnetic
particle or other suitable crack
detecting inspection should be
performed at least once a year,
if external conditions indicate
there has been unusual usage.
8. Nameplate and Warning Labels
for legibility and retension.
9. Chain stop in place and
properly secured.
Any deficiency should be corrected
before the hoist is returned to service.
Also, the external conditions may show
the need for more detailed inspection
which, in turn, may require the use of
non-destructive type testing.
Any parts deemed unserviceable are
to be replaced with new parts before
the hoist is returned to service. it is very
important that the unserviceable parts
are destroyed and properly disposed
of to prevent their possible future use
as a repair item.
When the unit is subjected to heavy
usage or dusty, gritty, moist or corrosive
atmospheric conditions, shorter time
periods must be assigned. inspection
must be made of all parts for unusual
wear, corrosion or damage, in addition
to those specifically mentioned in
the schedule.
5

HOOK INSPECTION

Hooks damaged from chemicals,
deformations or cracks, or that have
more than a 10° twist from the plane
of the unbent hook, excessive opening
or seat wear, must be replaced. Also,
hooks that are opened to the extent that
the latch does not engage the tip must
be replaced. Any hook that is twisted or
has excessive throat opening indicates
abuse or overloading of the hoist.
other load sustaining parts should be
inspected for damage.
depress
latch to
measure
throat
opening
Figure 5 - Hook inspection
Hoist Replace Hook When
Capacity Opening is Greater than:
(tons) (in.)
3/4 1-1/4
1 1-1/4
1-1/2 1-3/8
2 1-1/2
3 1-23/32
6 2-5/16
Check to assure the latch is not
damaged or bent and that it operates
properly. it should have sufficient spring
pressure to keep it tightly against the tip
of the hook and allow it to spring back to
the tip when released. if the latch does
not operate properly, replace the latch.
The chart above should be used
to determine when the hook must
wbe replaced.
LOAD CHAIN
Chain should feed smoothly into and
away from the hoist. if chain binds,
jumps or is noisy, first clean and
lubricate it (See Page 6). if trouble
persists, inspect chain and mating parts
for wear, distortion or other damage.
P/N 53855 (653-D) Rev AA may 2015