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
irregularity. |
| 5. |
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. |
|
