AMH MA005 Manual Del Usaurio página 4

Records and Reports
Some form of inspection record should be maintained for each hoist, listing all points requiring periodic
inspection. A written report should be made monthly on the condition of the critical parts of each hoist.
These reports should be dated, signed by the person who performed the inspection, and kept on file
where they are readily available for review.
Frequent Inspection
On a hoist in continuous service, frequent inspection should be made at the beginning of each shift. In
addition, visual inspections should be conducted during regular service for any damage or evidence of
malfunction.
1. OPERATION. Check for visual or abnormal noises which could indicate a potential problem. Do
not operate a hoist unless the load chain feeds through the hoist and hook block smoothly. Listen
for "clicking", binding or malfunctioning. The clicking sound of the pawl on the ratchet gear is
normal when a load is being raised. If chain binds, jumps, or is excessively noisy, clean and
lubricate the chain. If problem persists, return the hoist to your nearest repair center. Do not
operate the hoist until all problems have been corrected. Check that hand chain moves freely and
without binding or excessive drag. Hook should stop moving when hand chain stops moving.
2. HOOK LATCH. Check operation of the hook latch. Replace if broken or missing.
3. 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 1 (ref. Dwg.
H-01) or exceed a 10° twist (ref. Dwg. H-01). If th e 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.
4. 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. Replace a chain that fails any of the
inspections. Check lubrication and lubricate if necessary. See 'Load Chain'under LUBRICATION."
5. LOAD CHAIN REEVING. Make sure welds on standing links are away from load sheave reference
(Dwg. C-02). 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, capscrews, 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-02). Always use a genuine AMH replacement chain.
MAN-AMH-MA02
HEAVY
semi-annually
- 4
SEVERE
quarterly
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