Electric Chain Hoists (Single Brake)
Model NECH
PAGE: 46
NECH-0214
ACI Hoist & Crane | 2721 NE 4th Ave Pompano Beach, FL 33064| 954.367.6116
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Utilize the following steps to correct trolley motor phasing:
3.
Interchange any two lines supplying power to the trolley motor only.
DO NOT
reverse main power leads to
the hoist as this will also affect the phasing of the hoist motor.
4.
Re-energize the power supply to the hoist.
5.
Re-check the trolley travel for correct trolley motion. If the direction of the trolley travel matches the direction
marking of the trolley control device button activated (example, the trolley travel direction is EAST when the
trolley EAST control device button is activated), the trolley motor is properly phased. If the direction of the
trolley travel does not match with the direction marking of the trolley control device button activated, then the
trolley motor is improperly phased and must be corrected by repeating steps 1 through 5.
iii.
Operate hoist in the raising and lowering directions, without a load on the hook, and stop motion
to check operation of the motor brake. The hook drift should not exceed ¼ inch in either direction.
If the hook drift exceeds ¼ inch, the motor brake requires adjustment. Refer to the motor brake
section of this manual for instructions on motor brake adjustment.
6.9.3
Load Test
All hoists in which load suspension parts have been altered, replaced or repaired
SHALL
be dynamically tested by the
owner/user before being placed in operational service. The load test shall be conducted under the direction of a
designated person and a record of the test should be made. The test load applied to the hoist shall be at least equal to
the rated load capacity of the hoist, or greater as approved by the hoist manufacturer. Functions to be performed during
the load test include:
•
Operation of control devices.
•
Lifting and lowering.
•
Operation of brakes.
Load test procedures are as follows:
1.
Attach the test load to the hoist hook. The test load
SHALL
be at least equal to the rated load capacity of the
hoist. ACI will authorize the use of a hoist test load equal to 125% of the rated load capacity of the hoist for
load test purposes only.
2.
Before lifting the load, operate the hoist in the lifting direction to take any slack out of the hoist load chain.
3.
Lift the load a few inches and stop the hoist. If brakes stop and hold the load, continue lifting and lowering
the load several feet, stopping the hoist several times in each direction to check that the hoist braking system
stops and holds the load.
4.
If the hoist braking system stops and holds the load, the hoist operates in accordance with the control
devices and no unusual sounds are present during operation, the hoist is ready to be released for operating
purposes.
5.
If the hoist braking system does not stop and hold the load, the hoist does not operate in accordance with
the control devices or any unusual sounds are present during operation, the hoist is not ready to be released
for operating purposes; and corrective action must be taken.
1.
Disconnect the power supply, lockout and tagout the disconnecting means
before reconnecting (reversing) power lines to trolley.
2.
Only a qualified person should reconnect the power lines to the trolley.
