5.4 Trial run
(1) Before proceeding
Review the previous sections of the manual to be sure that each step was completed properly and that all parts
are attached securely.
For example :
(a) Whether the electric chain hoist is properly installed to the trolley. (See, Fig.6-7)
(b) Whether the stopper of the trolley on the beam is correctly positioned.
(c) Whether the bolts, nuts, and split pins are all sufficiently fastened.
(d) Whether the push button cord wire supports the force if the pendant is pulled.
(e) Whether the cable support is firmly installed to the cable support arm.
ALWAYS turn off the power source or breaker switch before performing any mechanical or electrical maintenance on the
equipment.
(2) Check lifting
Connect the main switch supplying power to the equipment. Push the push button switch and if the
hook does not move in the correct direction, the power supply is phased incorrectly. In this case, turn off the
power source or breaker switch and then reverse any two of the three power supply wires at the hoists power
source. The hook will then move in accordance with the directions of the push button.
(3) Check traversing
Verify that the controls agree with trolley direction. Make sure the trolly runs smoothly and attach the E/W or
N/S direction labels to the buttons.
(4) Check limit switch function
Refer to the name plate AB or AC, written "Upper Limit" or "Upper/Lower Limit", which is attached on the
hoist to make sure which types limit switch is equipped with the hoist. No name plate means no limit switch.
(a) Upper limit switch
Hold down the button until the bottom hook activates the upper limit switch, and make sure if the
hoist stops at the upper limit position.
(b) Upper and lower limit switch
Hold down the button until the bottom hook activates the limit switch, and make sure if the hoist
stops at the upper limit position. Then hold down the button until the bottom hook reaches the lower
limit position to activate the limit switch, and make sure if the hoist stops. In both cases, make sure that the
chain spring is compressed with enough clearance.
(5) Check the lift and lower brake functions
Lift up a suitable load. Push the or and or buttons on the push button switch to
raise or lower the hook a few times. Make certain the brake stops the motor immediately when releasing the
buttons.
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