Publicidad
Idiomas disponibles
Idiomas disponibles
Table 8-1 Hoist Inspection Methods and Criteria
Item
Method
Criteria
Shank and neck portions of the hook should
Hooks (bent shank or neck)
Visual
be free of deformations.
The latch should not be deformed. Attach-
ment of latch to hook should not be loose.
The latch spring should not be missing and
Visual,
Hooks (hook latches)
should not be weak. The latch movement
Function
should not be stiff – when depressed and
released the latch should snap smartly to its
closed position.
Bearing parts and surfaces should not show
significant wear. They should be free of dirt,
Visual,
Hooks (swivel bearing)
Function
grime, and deformations. The hook should
rotate freely with no roughness.
Should be free of rust, nicks, gouges, dents
and weld spatter. Links should not be de-
Load Chain (surface condition)
Visual
formed or show signs of abrasion. Surfaces,
where links bear on one another should be
free of significant wear.
The entire surface of each link should be
coated with lubricant, and free of dirt/grime.
Visual,
Load Chain (lubrication)
Auditory
The chain should not emit cracking noise
when hoisting a load.
The "G" dimension should not be greater than
the maximum value listed in Table 8-4. The
Load Chain (pitch and wire
Measure
diameter)
"E" dimension should not be less than the
minimum value listed in Table 8-4.
The chain should be reeved properly through
Load Chain (reeving)
Visual
load sheave. Chain, cushion rubbers, washers
and stoppers should be installed properly.
The container should not be damaged. Brack-
Chain Container
Visual
ets should not be deformed or missing.
Hoist components including load blocks, sus-
pension housing, chain attachments, clevises,
yokes, suspension bolts, shafts, gears, bear-
Visual,
ings, pins, and rollers should be free of cracks,
Housing and Mechanical
Auditory,
Components
Vibration,
distortion, significant wear, and corrosion.
Function
Evidence of same can be detected visually or
via detection of unusual sounds or vibration
during operation.
Visual, Check
Bolts, Nuts, and Rivets
with a proper
Bolts, nuts, and rivets should not be loose.
tool
The "B" dimension should not be less than the
Measure,
Motor Brushes
Visual
minimum value listed in Table 8-2
Cushion Rubber
Visual
Should be free of significant deformation
54
Action
Replace
Replace
Clean/Lubricate or replace as
required
Replace
Clean/Lubricate
Replace. Inspect Load Sheave
by qualified personnel
Reeve/ Install chain properly
Replace
Replace
Tighten or replace as required
Replace
Replace
Table 8-1 Hoist Inspection Methods and Criteria
Item
Method
Criteria
Contacts should be free of significant pitting or
Contractor Contacts
Visual
deterioration.
Depressing and releasing push buttons should
make and break contacts in switch contact
block and result in corresponding electrical
continuity or open circuit. Push buttons
Pendant (switches)
Function
should be interlocked either mechanically
or electrically to prevent simultaneous
energization of circuits for opposing motions.
Example: Up and Down
Wire connections to switches in pendant
Pendant (wiring)
Visual
should not be loose or damaged.
Pendant housing should be free of cracks and
Pendant (housing
Visual
mating surfaces of parts should seal without
gaps.
Pendant (labels)
Visual
Labels denoting functions should be legible.
The surface of cord should be free from nicks,
gouges, and abrasions. Each conductor in the
cord should have 100% electrical continuity
Visual,
Pendant (cord)
Electrical
even when cord is flexed back and forth.
Continuity
Pendant cord strain relief cable should absorb
the entire load associated with forces applied
to the pendant.
The label that indicates the capacity of the
Warning Labels
Visual
hoist should be legible and securely attached
to the hoist.
The label that indicates the capacity of the
Hoist Capacity Label
Visual
hoist should be legible and securely attached
to the hoist.
Action
Replace
Repair or replace as necessary
Tighten or repair
Replace
Replace
Replace
Replace
Replace
55
Publicidad
