2. Run load hook down to its lowest position. Place the slack end
of chain in chain container. Do not remove the chain stop.
3. Place chain container flush against housing with chain
stripper between top lugs. Insert long attachment pin and
replace retaining clip.
4. Feed the remainder of chain into container by operating
hoist in the “UP” direction to the top limit. This will permit the
chain to pile freely and prevent the chain from kinking, which
may occur if the chain is placed in the container by hand.
OPERATION
This hoist is designed for safe operation within the limits of its
rated capacity. It is controlled by the “UP” and “DOWN” buttons
of the pushbutton station. Two-speed models utilize 2-step
buttons, the first step for operating the slow speed and the
second for the fast speed. Although the Yale YJL is built with
many features to ensure safety, it is a requirement that a hoist
operator understands safe lifting practices. The following points
must be observed.
1. Do not overload the hoist.
2. Do not make extreme side pulls with the hoist.
3. Operate the hoist only in a hanging position with
adequate support.
4. Do not “sling” the load hook and chain around the load.
Use an approved sling.
5. Be sure there are no twists in the load chain as it travels
into the hoist housing. This condition should be constantly
checked on double chain hoists because it is possible for the
load block to be “capsized” or turned over one or more times.
6. Before raising a load, always check to see that it is held
securely in the hook or sling chains, etc. Raise the load
only until the load chain is taut and then double check the
rigging before continuing to raise the load.
7. Do not stand beneath a load! Do not move a load in such a
manner as to endanger personnel.
8. Don’t lower into areas where visibility is obscured unless
someone else is guiding the operation.
9. Use common sense at all times when operating a hoist.
10. Do not operate if direction of hook travel is not the same as
indicated on button being pushed.
11. Do not operate unless hook travel limit devices function.
Test without load each shift.
12. Do not operate when hoist is not centered over load.
13. Do not operate if chain is not seated properly in sprockets
or sheave grooves.
14. Do not operate damaged or malfunctioning hoist.
OVERLOAD LIMITING PROTECTION
This hoist is equipped with a factory-calibrated overload
limiting clutch that will permit the lifting of loads within its rated
capacity, but will prevent the lifting of damaging overloads while
the hoist is being operated. If the load being lifted exceeds the
lifting capability of the overload clutch, the hoist motor will
continue to run, causing overheating of both the clutch and
hoist motor. This condition should be avoided by immediately
releasing the “UP” button and reducing the load to within the
rated capacity of the hoist. See GEARING, page 10, for
additional instructions on this device.
MAINTENANCE
INSPECTIONS
A planned inspection routine should be established for this
hoist based upon frequency of use, severity of use, and
environmental conditions (Reference ASME Standard B30.16).
Some inspections should be made frequently (daily to monthly)
and others periodically (monthly to yearly). It is strongly
recommended that an Inspection and Maintenance Check List
and an Inspector’s Report, similar to those shown in Figures
10A and 10B, be used and filed for reference. All inspections
should be performed or overseen by a designated inspector.
Special inspections should be made following any significant
repairs or any operating occurrence leading one to suspect
that the hoist’s capability may have been impaired.
LOWERING WITHOUT POWER
If the power fails with a load suspended, the hoist will
automatically stop. In an emergency the load can be lowered
without power as follows:
1. DISCONNECT HOIST FROM POWER SUPPLY AND
REMOVE ELECTRICAL COVER.
2. Refer to Figure 5. Open disc brake manually by using two
screwdriver blades, one on each side of the brake at a point
close to the brake spring posts. Apply pressure to the
underside of the armature plate (points “X”) to close the
solenoid and release the brake.
3. Use several quick releases instead of holding brake open
continuously. Do not exceed normal lowering speed.
6
Do not allow screwdriver blades to touch rotating
friction disc “C”.
Do not use hoist to lift, support or otherwise
transport people.
Do not allow the load to descend rapidly. This causes
the motor to race and serious damage may result.
The overload limiting clutch is an emergency
protective device and should not be used to measure
the maximum load to be lifted, or to sense the
overload imposed by a constrained load. While the
overload limiting clutch will protect the hoist from
damaging overloads, it will not ensure that a load is
within the rated capacity of the hoist.
Do not allow load to come in contact with the chain
container. If this situation exists reset the “UP” limit
switch so that the hook block stops below the chain
container (See LIMIT SWITCH ADJUSTMENT, page 8).
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