CM-ET Lodestar - Manual (Page 11)

CHECKING LIMIT SWITCH OPERATION IF HOIST IS
EQUIPPED
Operate hoist over the entire length of its rated lift, checking
upper and lower limit switches for correct operation as follows:
1. Press (UP) control and raise the lower hook until
top of hook block is about one foot (.30 M) below the
hoist.
2. Cautiously continue raising the hook until the upper
limit switch stops the upward motion. The upper limit
switch is set at the factory to stop the hook block 6
inches (152 mm) from the bottom of all hoists.
3. If adjustment is necessary, see page 12.
4. Press (DOWN) control and cautiously lower hook
until lower limit switch stops the downward motion.
Maintain a minimum of 24” (610 mm) of chain freely
hanging over the side of the hoist.
5. If adjustment is necessary, see page 12.
NOTE: If the hoist is equipped with a chain
container/bag, reset the upper and lower limit
switches as indicated on page 12.
Under no condition should the hook block or load
be permitted to come in contact with the chain
container/bag. If contact is made, the function of
the chain container can be interfered with and its
fasterners imperiled.
NOTE: When chain bag is filled to capacity the
bag must be no more than 75% filled.
GENERAL
1. The Protector is designed to allow the intermediate gear
to slip on an excessive overload. An overload is indicated
when the hoist will not raise the load. Also, some clutching
noise may be heard if the hoist is loaded beyond rated
capacity. Should this occur, immediately release the
(UP) control to stop the operation of the hoist. At this
point, the load should be reduced to the rated hoist capacity
or the hoist should be replaced with one of the proper
capacity. When the excessive load is removed, normal
hoist operation is automatically restored.
CAUTION: The Protector is susceptible to overheating
and wear when slipped for extended periods. Under no
circumstance should the clutch be allowed to slip for
more than a few seconds.
Due to the above, a hoist equipped with a Protector is not rec-
ommended for use in any application where there is a possi-
bility of adding to an already suspended load to the point of
overload. This includes dumbwaiter (*see below) installa-
tions, containers that are loaded in mid-air, etc.
(*) Refer to limitations on Page ii concerning dumbwaiter
applications.
Also, if a Lodestar Hoist with a Protector is used at unusual
extremes of ambient temperatures, above 66°C (150
0 F), or
below -9°C (15°F), changes in lubricant properties may per-
mit the hoist to raise larger loads than under normal operat-
ing conditions and presents possibility of damage or injury.
2. With hoists that are equipped with an adjustable screw
limit switch, the limit switch will automatically stop the
hook at any predetermined point when either hoisting or
lowering.
OPERATING INSTRUCTIONS
HOIST
1. Check to ensure that the load point is in line with the hoist
head.
2. WHEN APPLYING A LOAD, IT MUST BE DIRECTLY
IN LINE WITH HOIST. AVOID OFF-CENTER LOADING
OF ANY KIND.
3. 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.
4. Do not allow the load to swing or twist while hoisting.
5. Do not allow the load and/or attachments to bear against
the hook latch.
SAFETY PROCEDURES
For safety precautions and a list of Do’s and Do Not’s for safe
operation of hoists, refer to page i.
1. When preparing to lift a load, be sure that the attachments
to the hook are firmly seated in hook saddle. Avoid off
center loading of any kind, especially loading on the point
of hook.
2. 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.
3. Do not load hoist beyond the rated capacity shown on
hoist identification plate or on the hoist motor housing
cover, Models B, C & F and on hoist back frame cover,
Models J, L, R, LL & RR. Overload can cause immediate
failure of some load-carrying part or create a defect
causing subsequent failure at less than rated capacity.
When in doubt, use the next larger capacity of CM
Lodestar Hoist.
4. Do not use this or any other overhead materials handling
equipment for lifting persons.
5. Warn personnel of your intention to lift a load in the area.
Tie off the load with auxiliary chains or cables before
access to the area beneath the load is permitted.
6. Permit only competent personnel to operate unit.
7. Do not wrap the load chain around the load and hook onto
itself as a choker chain.
Doing this will result in:
a. The loss of the swivel effect of the hook which could
result in twisted chain and a jammed lift wheel.
b. The upper limit switch, if so equipped, is by-passed
and the load could hit the hoist.
c. The chain could be damaged at the hook.
8. Before lifting load, 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
remove twist.
W WA AR RN NIIN NG G
Allowing the hook block to run into the bottom of the hoist
when raising a load or allowing the chain to become taut
between the loose end screw and the frame when lowering
a load may break the chain and allow the load to drop.
T TO O A AV VO OIID D IIN NJ JU UR RY Y::
Do not allow the hook block to contact the bottom of the
hoist or the loose end chain to become taut.
V
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OPERATING INSTRUCTIONS
7