CM 5310A, Руководство по эксплуатации, техническому обслуживанию и каталог запасных частей

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7
P/N: 192065084 Rev AA March 2020
(ENGLISH)
ENGLISH
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.
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 frequency
of periodic inspections is based upon usage as defined in ASME
B30.21. Periodic inspections should include those items
as well as the following:
1. Chain for excessive wear or stretch (See Figures 6 and 7, page 8).
2. Worn, cracked or distorted parts such as lower hook block,
upper hook block, upper hook pin, chain guide, bushings,
lever, brake cover, handwheel, 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
brake ratchet assembly if contaminated, glazed or if thickness
is less than 0.256 in. (6.5 mm) for 0.75 Tonne, 1 Tonne and 1.5
Tonne, 0.307 in. (7.8 mm) for 2 Tonne, 3 Tonne and 6 Tonne.
6. Corroded, stretched or broken pawl springs, directional lever
pawl spring and lever ratchet spring.
7. Hooks – Visual inspection based upon ASME B30.10
and ASME B30.21.
8. Nameplate and Warning Labels for legibility and retention.
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.
HOOK INSPECTION
Hooks damaged from chemicals, deformations or cracks, or that
have a twist from the plane of the unbent hook, excessive opening
or seat wear, must be replaced (see ASME B30.10). 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.
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 below should be used to determine when the hook must
be replaced.
a
h
b
Depress latch
to measure
throat opening
Figure 5 - Hook Inspection
Hoist
Capacity
(Tonnes)
Dimensions in. (mm)
"a" Std.
"a"
Max.
"b" Std. "b" Min. "h" Std. "h" Min.
0.75
1.06
(27)
1.17
(29.7)
.59
(15)
.56
(14.3)
.79
(20)
.75
(19)
1.0
1.14
(29)
1.25
(31.9)
.75
(19)
.71
(18.1)
.86
(22)
.82
(20.9)
1.5
1.26
(32)
1.38
(35.2)
.77
(19.5)
.73
(18.5)
1.03
(26.2)
.98
(24.9)
2.0
1.37
(35)
1.51
(38.5)
.86
(22)
.82
(20.9)
1.18
(30)
1.12
(28.5)
3.0
1.57
(40)
1.73
(44)
1.10
(28)
1.01
(26.6)
1.44
(36.6)
1.37
(34.8)
6.0
1.73
(44)
1.90
(48.4)
1.26
(32)
1.19
(30.4)
1.76
(44.8)
1.68
(42.6)
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 8).
If trouble persists, inspect chain and mating parts for wear,
distortion or other damage.
Weld
Wear In
These Areas
Figure 6 - Chain Inspection
CHAIN INSPECTION
First clean chain with a non-caustic/ nonacid type solvent
and make a link by link inspection for nicks, gouges, twisted links,
weld spatter, corrosion pits, striations (minute parallel lines),
cracks in weld areas, wear and stretching. Chain with any one
of these defects must be replaced.
Slack the portion of the chain that normally passes over the liftwheel.
Examine the interlink area for the point of maximum wear (polishing).