11
10001921 REV AC
July 2019
When running chain “out”, the same principal should be adopted but
this time with the “dead” end side of the hoist facing up. Again, this
will prevent twists causing chain jam.
When using Lodestar hoists with 2 chain falls (for example
on Model R or RR) you should check for twists in the chain.
The best way to check for this condition is to run the lower hook up
(without load) to within about 24 inches (600mm) of the hoist when
any twists will become apparent, if the chain has been properly
installed a twist can only occur if the lower block has been capsized
between the strands of chain – reverse capsize to remove twists.
• Before moving a truss use a verbal warning such as “truss
moving”. Always “bump” the hoists before lifting or lowering.
This will do 2 things:
– It will act as a warning to people around that the rig is about
to move should they not have heard your warning.
– Any problem with rigging or reeving will show up in this
“bumping through” – always leave enough chain to “bump”
without running out of chain.
• Always have one person in charge of moving the rig, but as
many “spotters” as necessary to watch any hoists the main
person cannot see.
• When replacing the hoist in the road case, the chain should
be run to the lower limit then operated in the up direction
for about 6 (152 mm) to 8 (203 mm) inches. This should be
done because:
– The ceiling height may be lower in this venue than the
next. If you run all the chain out, this assures enough chain
for the rigger to hit the point in the next venue regardless of
the height.
– Running off the lower limit prevents any damage to the
micro switch due to vibration as the hoist travels to the
next venue.
Allowing the load to bear against the hook latch and/or hook tip
can result in loss of load.
TO AVOID INJURY:
Do not allow the load and/or attachments to bear against the hook
latch and/or hook tip. Apply load to hook bowl or saddle only.
11. Take up a slack load chain carefully and start load easily to
avoid shock and jerking of hoist load chain. If there is any
evidence of overloading, immediately lower the load and
remove the excess load.
12. When lifting, raise the load only enough to clear the floor
or support and check to be sure that the attachments to
the hook and load are firmly seated. Continue lift only after
you are assured the load is free of all obstructions.
13. Do not allow the load to swing or twist while hoisting.
14. Never operate the hoist when flammable materials or vapors
are present. Electrical devices produce arcs or sparks that can
cause a fire or explosion.
15.
STAY ALERT!
Watch what you are doing and use common
sense. Do not use the hoist when you are tired, distracted
or under the influence of drugs, alcohol or medication causing
diminished control
INSPECTION
To maintain continuous and satisfactory operation, a regular
inspection procedure must be initiated to replace worn or damaged
parts before they become unsafe. Inspection intervals must be
determined by the individual application and are based on the type
of service to which the hoist will be subjected.
The type of service to which the hoist is subjected can be classified
as "Severe, "Normal", "Stand-by", "Rental", or "Out of Service".
Stand-by Service:
Hoist operates 25 or fewer days a year,
but at least once.
Rental Service:
Hoist is operated on an irregular schedule
determined by rental use.
Out of Service:
Hoist does not operate for a period of a
year or longer.
Normal Service:
Hoist operates 200 or fewer days a year,
but more than 25.
Severe Service:
Hoist operates in excess of 200 days a year.
Two classes of inspection - frequent and periodic - must
be performed.
Frequent Inspections:
These inspections are visual examinations
by the operator or other designated personnel. Records of such
inspections are not required. The frequent inspections are to be
performed monthly for normal service, weekly to monthly for heavy
service, and daily to weekly for severe service, and they should
include those items listed in Table 4.
Periodic Inspections:
These inspections are visual inspections of
external conditions by an appointed person. Records of periodic
inspections are to be kept for continuing evaluation of the condition
of the hoist. Periodic inspections are to be performed yearly for
normal service, semi-annually for heavy service and quarterly for
severe service, and they are to include those items listed in Table 4.
CAUTION: Any deficiencies found during inspections are to
be corrected before the hoist is returned to service. Also, the
external conditions may show the need for disassembly to
permit a more detailed inspection, which, in turn, may require
the use of nondestructive type testing.
PREVENTIVE MAINTENANCE
In addition to the above inspection procedure, a preventive
maintenance program should be established to prolong the useful
life of the hoist and maintain its reliability and continued safe use.
The program should include the periodic and frequent inspections
with particular attention being paid to the lubrication of the
various components using the recommended lubricants (see
online resources).
HOOK INSPECTION
Hooks damaged from chemicals, deformations or cracks, or any
visibly apparent bend or twist from the plane of the unbent hook,
excessive opening or seat wear must be replaced. Also, hooks
that are opened and allow the latch to not engage the tip must be
replaced. Any hook that is twisted or has excessive throat opening
indicates abuse or overloading of the unit. Inspect other load
sustaining parts, hook block screws, load pins and hook block
bodies for damage.
On latch type hooks, check to make sure that the latch is not
damaged or bent and that it operates properly with sufficient spring
pressure to keep the latch tightly against the tip of the hook and
allow the latch to spring back to the tip when released. If the latch
does not operate properly, it should be replaced. See Figure 12 to
determine when the hook must be replaced.
SUSPENSION BOLTS SHOULD BE REPLACED ANY TIME THE
SUSPENSION IS REMOVED FROM THE HOIST.
