User Manual

P/N: 192047082 (REV AA) 627NH January 2018
14
INSPECTION
To maintain continuous and satisfactory operation, a regular
inspection procedure must be initiated to replace worn or
damaged parts before they become unsafe. Inspection intervals
must be determined by the individual application and are based
on the type of service to which the hoist will be subjected.
The type of service to which the hoist is subjected can be
classied as “Normal”, “Heavy”, or “Severe”.
Normal Service:
Involves operation with randomly distributed loads within
the rated load limit, or uniform loads less than 65 percent
of rated load for not more than 25 percent of the time.
Heavy Service:
Involves operating the hoist within the rated load limit which
exceeds normal service.
Severe Service:
Normal or heavy service with abnormal operating conditions
or constant exposure to the elements of nature.
Two classes of inspection - frequent and periodic - must
be performed.
Frequent Inspections:
These inspections are visual examinations by the operator
or other designated personnel. Records of such inspections
are not required. The frequent inspections are to be
performed monthly for normal service, weekly to monthly
for heavy service, and daily to weekly for severe service,
and they should include those items listed in Table 7.
Periodic Inspections:
These inspections are visual inspections of external
conditions by an appointed person. Records of periodic
inspections are to be kept for continuing evaluation of the
condition of the hoist.
Periodic inspections are to be performed yearly for normal
service, semi-annually for heavy service and quarterly for severe
service, and they are to include those items listed in Table 8.
CAUTION: Any deficiencies found during inspections are to
be corrected before the hoist is returned to service. Also,
the external conditions may show the need for disassembly
to permit a more detailed inspection, which, in turn, may
require the use of nondestructive type testing
PREVENTATIVE MAINTENANCE
In addition to the above inspection procedure, a preventive
maintenance program should be established to prolong
the useful life of the hoist and maintain its reliability and
continued safe use. The program should include the periodic
and frequent inspections with particular attention being paid
to the lubrication of the various components using
the recommended lubricants (see page 57).
SUSPENSION INSPECTION CRITERIA
BRACKETS - Replace any brackets found to be
cracked or distorted.
BOLTS - If the suspension is removed for any
reason, including inspection, the suspension bolts
should be replaced.
NYLON THREAD LOCKING NUTS - It is not necessary
to replace the nylon thread locking nuts each time the
suspension bolts are replaced as long as new bolts with the
locking patch are being used. It is recommend that the nylon
thread locking nuts are replaced each time the hoist is torn
down to allow these nuts to be replaced.
HOOK REMOVAL CRITERIA
Based on B30-10 Hooks shall be removed from service if
damage such as the following is visible and shall only be
returned to service when approved by a qualied person:
a. Missing or illegible rated load identication or illegible
hook manufacturers’ identication or secondary
manufacturer’s identication.
b. Excessive pitting or corrosion.
c. Cracks, nicks, or gouges.
d. Wear--any wear exceeding 10% of the original section
dimension of the hook or its load pin.
e. Deformation--any visibly apparent bend or twist from
the plane of the unbent hook.
f. Throat opening-any distortion causing an increase in
the throat opening of 5% not to exceed ¼” (6mm).
g. Inability to lock - any self-locking hook that does
no lock.
h. Inoperative latch any damaged latch or malfunctioning
latch that does not close the hook’s throat.
i. Thread wear, damage, or corrosion.
j. Evidence of excessive heat exposure or
unauthorized welding.
k. Evidence of unauthorized alterations such as drilling,
machining, grinding, or other modications.
Figure 9. Hook Inspection
Table 6. Hook Inspection Dimensions
Models
Latch Type Hook Latchlok
®
Hook
"A" Max "B" Min "A" Max "B" Min
A, AA, B, C & F
1.19"
(30.2mm)
.91"
(23.1mm)
1.48"
(37.7mm)
.75"
(18.8mm)
E & H
1.31"
(33.3mm)
1.08"
(27.5mm)
1.48"
(37.7mm)
.75"
(18.8mm)
"A" MAX.
A
A
"B" MIN
"A" MAX
B
B
"B" MIN
Section A-A Section B-B