Harrington Hoists and Cranes MR Trolley - (MR2) - Manual (Page 33)

3.6 Pre-operational Checks and Trial Operation
3.6.1 Refer to the trolley's Nameplate and record the Code, Lot and Serial Number in the space provided on
the cover of this manual.
3.6.2 Refer to the hoist's owner's manual and perform all pre-operational checks for the hoist.
3.6.3 Perform pre-operational checks for the trolley:


Confirm the adequacy of the rated capacity for all slings, chains, wire ropes
and all other lifting attachments before use. Inspect all load suspension members for damage prior
to use and replace or repair all damaged parts.
 Ensure that trolley is properly installed on the beam, and stops for the trolley are correctly
positioned and securely installed on the beam.
 Ensure that all nuts, bolts and split pins (cotter pins) are sufficiently fastened.
 Pull down on the Pendant and ensure that the Cord Strain Relief Cable takes the force, not the
Pendant Cord.


Check supply voltage before everyday use. If the voltage varies more than
10% of the rated value, electrical devices may not function normally.
3.6.4 Confirm proper operation.
 Before operating read and become familiar with Section 4 - Operation.
 Before operating ensure that the hoist (and trolley) meets the Inspection, Testing and Maintenance
requirements of ANSI/ASME B30.16.
 Before operating ensure that nothing will interfere with the full range of the hoist’s (and trolley’s)
operation.
3.6.5 Proceed with trial operation to confirm proper operation.
 Verify that the controls agree with hoist direction. Make sure that depression of the Up button lifts
the load chain and hook and depression of the Down button lowers the load chain and hook. If the
load chain and hook does not move in the correct direction when the push buttons are pushed, the
power supply is phased incorrectly. In this case, turn off the power source or breaker switch then
reverse any two of the three wires at the power source. The hook will then move in accordance
with the directions of the push button.
 Operate the trolley though it's full range of motion. Make sure the trolley runs smoothly and does
not bind. Check the power supply and festoon system for proper operation
 Perform inspections per Section 5.3, “Frequent Inspections”.
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