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6
(3) Operate “UP” button briefly to determine
direction of hook travel.
(4) If hook raises when “UP” button is
depressed, phasing is correct.
(5) If hook lowers when “UP” button is
depressed, hoist is “Reverse Phased.”
TURN AND LOCK POWER OFF and
check the pushbutton wiring. If the
pushbutton was wired properly, correct the
problem by interchanging any two leads at
power source
connection. Do not change
internal wiring of hoist.
c) Check Limit Switch Operation.
(1) A block operated upper limit stop is
furnished as standard equipment on all
Yale “Global King” hoists. This limit stop is
factory set to stop the lower block at the
safest high position, guarding against over
travel and possible damage to hoist. No
adjustment can be made. However, the
hoist should be tested by jogging the lower
block against the limit weight to be sure
the limit switch is functioning properly.
When lower block lifts the limit weight, the
hoist will automatically stop. If lower block
coasts through the limit switch when lifting
a reversing switch will automatically close
and reverse direction of motion to
lowering.
WARNING
Damage to the hoist, a dropped load, and
injury may result if limit switches fail due
to improper use.
TO AVOID INJURY:
UNDER NORMAL OPERATING CONDITIONS,
STOP HOIST TRAVEL BEFORE ENGAGING
LIMIT SWITCHES. LIMIT SWITCHES ARE
SAFETY DEVICES AND SHOULD NOT BE
USED AS NORMAL OPERATING CONTROL.
WARNING
Some hoists may be shipped with the
electrical controls loose (disconnected)
and will not have the upper and lower
limit switches connected. DO NOT
OPERATE HOIST UNTIL LIMIT SWITCH-
ES ARE PROPERLY CONNECTED AND
ADJUSTED. Failure to do so may allow
hoist to be operated beyond proper travel
limits, which can cause load to drop,
resulting in damage to equipment or
injury.
(2) A geared rotary type upper and lower limit
switch is also provided as standard. This
switch is adjustable and although roughly
preset by the factory, it should be adjusted
at time of installation to the desired high
and low limits of lower block travel. Refer
to SECTION VII, Paragraph 7-3.
d) Check Lower Block and Hoisting Cable.
Depress “DOWN” push button and run lower
block to its lowest position. No less than two
wraps shall remain on the drum with the
loaded hook in its lowest position. Also
check to see that the lower block and rope
do not twist excessively. If it does twist to
the extent that two ropes rub against each
other, disengage the swaged rope end from
the frame anchor and twist the rope four or
five turns in a direction opposite to that
which the block turns. Reconnect rope to the
frame anchor, holding firmly to eliminate
rope twisting back to its original position.
Operate hoist up and down a few times. If
lower block still rotates excessively repeat
process until twisting is corrected.
e) Lubricate Hoisting Cable.
For longer cable
life, it is recommended that the cable be
lubricated at time of installation by applying
a heavy coating of lubricant CL (Paragraph
4-7) as outlined in SECTION IV, Paragraph
4-3.
f) When first using the hoist and trolley,
operate with lighter loads through full travel
before applying maximum load.
SECTION III – OPERATION
3-1. GENERAL. Operation of Yale “Global King”
hoists is controlled by a convenient pendant push
button station. With it, the hoist can be controlled to
give fast lifting and lowering; or controlled to lift or
lower the load in small increments, providing
accurate spotting. The push button station has a
built-in interlock to prevent depressing opposing
buttons simultaneously.
When first using the hoist, break in by operating
under lighter loads to full travel before applying
maximum load.
3-2. PUSH BUTTON OPERATION.
a) Depress push button marked “UP” to raise
load.
b) Depress push button marked “DOWN” to
lower load.
c) Depress push button marked “RIGHT” to
traverse one direction.