failure at less than rated capacity. When in doubt, use
the next larger capacity of CM Lodestar Hoist.
Do not use this or any other overhead materials
handling equipment for lifting persons.
Stand clear of all loads and avoid moving a load
over the heads of other personnel. Warn
personnel of your intention to move a load in
Do not leave the load suspended in the air
Permit only qualified personnel to operate unit.
Do not wrap the load chain around the load and
hook onto itself as a choker chain. Doing this
will result in:
The loss of the swivel effect of the hook
which could mean twisted chain and a
jammed lift wheel.
The upper limit switch is by-passed and the
load could hit the hoist.
The chain could be damaged at the hook.
On two part reeved hoists, check for twists in
the load chain. A twist can occur if the lower
hook block has been capsized between the
strands of chain. Reverse the capsize to
SECTION C- MAINTENANCE
operation, a regular inspection procedure must be
initiated so that worn or damaged parts can be replaced
before they become unsafe. The intervals of inspection
must be determined by the individual application based
upon the type of service to which the hoist will be
subjected and the nature of the critical components and
the degree of their exposure to wear, deterioration or
malfunction. The inspection of hoists is divided into two
general classifications designated as "frequent" and
The type of service to which the hoist is
subjected can be classified as "Normal", "Heavy", and
Normal Service: Normal service is defined as
that service which involves operation with randomly
distributed loads within the rated load limit, or uniform
loads up to 65 percent of rated load, for not more than
25 percent of a single work shift.
Heavy Service: Heavy service is defined as
that service within the "rated load limit which exceeds
Severe Service: Severe service is defined as
that service which involves normal or heavy service with
abnormal operating conditions.
Below is the recommended, maximum intervals
of inspection. When the unit is subjected to extra heavy
usage or dusty, gritty, moist or other adverse
atmospheric conditions, shorter time intervals must be
assigned. During the Periodic Inspection, inspection
must be made of all parts for wear, corrosion effect, or
damage, in addition to those specifically mentioned.
Minimum Inspection Schedule
designated personnel and records of such
inspections are not required. For Normal,
Heavy and Severe Service, the frequent
inspections are to be performed daily or monthly
and shall include the following items:
Brake for evidence of slippage daily.
Limit switches for proper operation monthly
(refer to page 5).
Load chain for lubricant, wear, damaged links or
foreign matter daily (refer to page 14)
Hooks for damage, cracks, twists, excessive
opening, latch engagement and latch operation
monthly (refer to page d)
deficiencies noted are to be corrected before the
hoist is put into service.
These inspections are visual inspections of
external conditions by an appointed person and records
of periodic inspections are to be kept to provide the
basis for continuing evaluation of the condition of the
hoist. For Normal and Heavy Service, the periodic
inspections are to be performed yearly with the hoist in
place. For Severe Service, the periodic inspections are
to be performed quarterly.
Periodic Inspections are to include those items
listed under frequent inspections as well as the
Inspect the loose end link, loose end screw and
dead end block on double reeved units.
Replace the loose end link if it has opened and
check the operation of lower limit switch.
Check that the loose end screw is tight and the
pin seated at the dead end of chain.
Inspect the upper suspension adapter making
sure it is fully seated in the recess and that both
cap screws are tight. If a condition of loose
screws persists, replace the self-locking nuts in
Inspect contactor and selector relay (two speed
unit) for burnt or pitted contacts and loose o
terminals. Replace when required.
On single phase units (without a contactor) and
two speed units, check operation of the control
station switching arm that it pivots freely and
does not stick in either position.