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b)
Initial test, of units returned to service after inactivity of more than one month, does not affect
the date of the next periodic test as previously scheduled.
c)
Visual inspection of parts to determine that they are free of corrosion, debris and can operate
as intended.
d)
All fasteners are in place and tight.
e)
All markings and the Warning Label, illustration (96) is on the unit and legible.
f)
Operation. Check for abnormal noises which could indicate a potential problem. The load
chain must travel through the hoist and hook block smoothly. Listen for "clicking", binding or
malfunctioning. The clicking sound of the pawl (22) on the ratchet disc (5) is normal when a
load is being raised. If chain binds, jumps, or is excessively noisy, clean and lubricate the
chain. Check that hand chain moves freely and without binding or excessive drag. Hook should
stop moving when hand chain stops moving.
g)
Hook latch. Check operation of the hook latch. Replace if broken or missing.
h)
Hooks. Check for wear or damage, increased throat width, bent shank or twisting of hook.
Replace hooks which exceed the throat opening discard width (15%) shown in Table H-01 or
exceed a 10° twist (ref. Dwg. H-01). If the hook latch snaps past the tip of the hook, the hook is
sprung and must be replaced. Check hooks swivel easily and smoothly. Repair or lubricate as
necessary
i)
CHAIN (ref. Dwg. C-01). Examine each of the links for bending, cracks in weld areas or
shoulders, transverse nicks and gouges, weld splatter, corrosion pits, striation (minute parallel
lines) and chain wear, including bearing surfaces between chain links. Check lubrication and
lubricate if necessary. See 'Load Chain' under LUBRICATION.
j)
LOAD CHAIN REEVING. Make sure welds on standing links are assembled away from the
driven chain wheel, reference (Dwg. C-04). Reinstall chain if necessary. Check that the last link
of the load chain is securely connected. Make sure chain is not capsized, twisted or kinked.
Adjust as required.
Periodic Inspection
Frequency of periodic inspection primarily depends on the severity of usage:
NORMAL
yearly
Disassembly may be required for HEAVY or SEVERE usage. Keep accumulative written records of
periodic inspections to provide a basis for continuing evaluation. Inspect all items in "Frequent
Inspection." Also inspect the following:
1. FASTENERS. Check rivets, cap screws, nuts, cotter pins and other fasteners on hooks, hoist body
and chain bucket, if used. Replace if missing and tighten or secure if loose.
2. ALL COMPONENTS. Inspect for wear, damage, distortion, deformation and cleanliness. If external
evidence indicates the need for additional inspection return the hoist to your nearest service repair
center.
3. HOOKS. Inspect hooks for cracks. Use magnetic particle or dye penetrant to check for cracks.
Inspect hook retaining parts. Tighten or repair, if necessary. Refer to applicable specifications for
additional hook inspection information.
4. CHAIN SHEAVES. Check for damage or excessive wear. If damage or wear is noted, return the hoist
to your nearest service repair center.
5. LOAD CHAIN. Measure the chain for stretching by measuring across five link sections all along the
chain (ref. Dwg. C-01). When any five links in the working length reach or exceed the discard length
shown in Table, replace the entire chain. Insure the load chain is installed with the weld side of the
standing links positioned away from the drive wheel in the hoist. If the chain is not installed correctly
then reinstall reference (Dwg. C-04). Always use a genuine AMH replacement chain.
6. BRAKES. Raise a load equal to the rated capacity of the hoist a few centimeters (inches) off the floor.
Verify hoist holds the load without drift. If drift occurs, contact your nearest service repair center for
repair information.
MAN-AMH-MA-07
HEAVY
semi-annually
- 4
SEVERE
quarterly
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