Allowing the load to bear against the hook latch and/or
hook tip can result in loss of load.
Do not allow the load to bear against the hook latch
and/or hook tip. Apply load to hook bowl or saddle only.
13. Never operate the hoist when flammable materials or
vapors are present. Sharp contact between metal parts
can produce sparks that can cause a fire or explosion.
14. STAY ALERT! Watch what you are doing and use com-
mon sense. Do not use the hoist when you are tired,
distracted or under the influence of drugs, alcohol or
medication causing diminished control.
MAINTENANCE
INSPECTION
To maintain continuous and satisfactory operation, a regu-
lar 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 indi-
vidual application and are based upon the type of service to
which the hoist will be subjected. The inspection of hoists is
divided into two general classifications designated as "fre-
quent" and "periodic".
Frequent Inspections:
These inspections are visual examinations by the operator
or other designated personnel. The frequent inspections are
to be performed daily and shall include the following items:
a. Braking mechanisms for evidence of slippage-
daily.
b. Load Chain for lubricant, wear, damaged links
or foreign material-daily (See LOAD CHAIN, page 5).
Any deficiencies noted are to be corrected before the hoist
is returned to service.
Periodic Inspections:
These are inspections by an appointed person who makes
records of apparent external conditions to provide the basis
for a continuing evaluation. For normal service, the periodic
inspections are to be performed yearly and for heavy serv-
ice, the periodic inspections are to be performed semi-
annually.
Due to the construction of the hoist, it will be necessary to
partially disassemble the unit to perform the periodic
inspections. The periodic inspections are to include those
items listed under frequent inspections as well as the fol-
lowing:
a. Chain for excessive wear or stretch (See page 5).
b. Worn, cracked or distorted parts such as hook
blocks, hand chain guides, chain guide, stripper,
loose end connector, shafts, gears, bushings and
bearings.
4
WARNING
TO AVOID INJURY:
c. Inspect for wear on the tip of the driver, stops on
handwheel and pockets of the liftwheel and hand
wheel.
d. Loose or missing screws, nuts, pins or cotter pins.
e. Inspect brake components for worn, glazed or con-
taminated brake disc and scoring of the brake hub
and brake plate. If the thickness of the friction
washer is less than 1/32 inch, it should be replaced.
f. Replace missing or damaged warning labels.
g. Corroded, stretched or broken brake spring.
h. Hooks-dye penetrant, magnetic particle or other
suitable crack-detecting inspections should be per-
formed at least once a year, if external conditions
indicate there has been unusual usage.
Any deficiencies noted are to 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 nondestructive-type testing.
Any parts that are deemed unserviceable are to be
replaced with new CM
parts before the unit is returned to
®
service. It is very important that the unserviceable parts be
destroyed to prevent possible future use as a repair item
and properly disposed of.
Hook Inspection
Hooks damaged from chemicals, deformation or cracks, or
that have more than a 10
o
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 indi-
cated abuse or overloading of the hoist. Other load sus-
taining parts should be inspected for damage.
Check to assure the latch is not damaged or bent and that
it operates properly. It should have sufficient spring pres-
sure 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.
E
D
B
Figure 3 - Hook Inspection
H
oist
Critical Hook Dimensions (in.)
Capacity
(tons)
A
1/2
0.612
1
0.787
2
1.012
3
1.346
5
1.772
10
2.657
twist from the plane of the
C
A
B
C
D
0.393
1.062
0.390
0.213
0.730
1.250
0.531
0.230
0.843
1.500
0.670
0.319
0.967
1.732
0.769
0.349
1.181
1.850
1.102
0.472
1.575
2.677
1.378
0.669
E