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LEVER HOIST INSPECTION & MANUALS
2016-05-11

LEVER HOIST INSPECTION & MANUALS

 

 

SAFETY INSTRUCTIONS

 

The equipment should only be operated and maintained by a competent person
Do not exceed the rated capacity of the lever hoist
Do not use the load chain as a sling
Do not extend the operating lever
Do not use undue effort to operate the lever hoist
Do not leave suspended loads unattended
Do not use for lifting people
Ensure suspension and anchorage points are adequate for the full load being lifted.
Keep anybody out of the place under the loading.

 

 

IN SERVICE INSPECTION & MAINTENANCE

 

Ensure the lever hoist is inspected regularly by a competent person.
Keep the load chain lubricated and free from debris.
Cheek the operation of the brakes.
Before use check for the following defects: wear damage to hooks, damage to chain i.e. distorted links.
Bent links, stretched links, corroded links.

 

 

OPERATION

 

lifting:
Select "UP" position on selection switch, ratchet handle to lift load.

Lowering:
Select "DN" position on selection switch, ratchet handle to lower load.

 

 

Pre-use Inspection

 

The operator shall perform a pre-use inspection, if any deficiencies are found the equipment will be taken out of
service and the supervisor notified.

 

1. Visually inspect all load chains for  gross damage that may be a hazard.
2. Hoist is properly secured.
3. The load does not exceed the load limit on the warning label.
4. Check that motions are smooth and regular with no hesitations, vibration, binding, unusual noise, or other 

5.
irregularity.
Chain is not kinked or damaged.

 

 

Annual Inspection

 

The Annual inspection may be performed with the hoist in its normal location and do not require the hoist to be
dismantled. Covers and other items normally supplied to allow inspection of components should be opened or
removed for these inspections.

 

  Inspection Items
1. Operating mechanisms checked for maladjustment and listened to for unusual sounds that may indicate
problems.
2. Tightness of bolts, nuts, and rivets.
3. Excessive wear, corrosion, cracks, or distorted parts in the following:

 

  • load blocks

  • suspension housings

  • hand chain wheels

  • chain attachments

  • clevises

  • yokes

  • suspension bolts

  • shafts

  • gears

  • bearings

  • pins

  • rollers

  • locking and clamping devices 

 

4. Damage or excessive wear on hook-retaining nuts or collars and pins and welds or rivets used to secure the retaining members.
5. Excessive wear or damage on load sprockets, idler sprockets, hand chain wheel, and drums or sheaves shall be checked for damage or excessive wear.
6. Hand chain-operated hoists checked for evidence of worn, glazed, or oil-contaminated friction disks; worn
pawls, cams, or ratchets; and corroded, stretched, or broken pawl springs in braking mechanism.
7. Evidence of damage to supporting structure or trolley.
8. Presence of legible warning labels .
9. End connections load chains shall be checked for evidence of wear, corrosion, cracks, damage, or distortion.
10.Welded link hoist chain
11.Hooks

 

Welded Chain Inspection

 

1. The hoist shall be tested under load in lifting and lowering directions and the operation of the chain and
sprockets shall be observed. The chain should feed smoothly into and away from the sprockets.
2. If the chain binds, jumps, or is noisy, it shall first be checked to ensure that it is clean and properly
lubricated. If the trouble persists, the chain and mating parts shall be inspected for wear, distortion,
or other damage.
3. The chain shall be examined visually for gouges, nicks, weld spatter, corrosion, and distorted links.
4. The chain shall then be slackened and the adjacent links moved to one side to inspect for wear at the
contact points.
5. The chain should be measured according to the hoist manufacturer's instructions. If instructions are
not available, the process shall continue as follows. 

 

  • An unworn, unstretched length of the chain shall be selected (e.g., at the slack end).

  • The chain shall be suspended vertically under tension and, using a calliper-type gage, the outside
    length of any convenient number of links shall be measured (approximately 12 to 24 inches overall).

  • The same number of links in the used sections shall be measured and the percentage increase in
    length shall be calculated.

 

 

Hook Inspection

 

1. Cracks, nicks, or gouges.
2. Latch engagement, damaged or malfunctioning latch (if provided) .
3. Hook attachment and securing means.
4. Deformation. Any bending or twisting exceeding 10 degrees from the plane of the unbent hook.
5. Throat Opening. Any distortion causing an increase in throat opening exceeding 15 percent.
6. Wear. Any wear exceeding 10 percent of the original section dimension of the hook or its load pin.