Harrington Hoists and Cranes SMR Trolley - Manual (Page 33)

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6.0 Maintenance & Handling
6.1 Lubrication
6.1.1 Lubricate the following trolley components with NLGI (National Lubricating Grease Institute) #2 or
equivalent grease.
6.1.2 Track Wheel Gear – Clean and re-grease the Track Wheel gears and motor output pinion every three
months (more frequently for heavier usage or severe conditions). Do not use an excessive amount of
grease and avoid getting any grease on the running surfaces of the Track Wheels or the beam.
6.1.3 Gear Box – The reduction gearing in the motor should be cleaned and lubricated at least once per year
for normal usage. Clean and lubricate the reduction gear assembly more frequently for heavier usage
or severe conditions. Gain access to the gears by removing the four bolts that mount the motor
assembly to the trolley Side Plate. Make sure to properly orient and reuse the neoprene gasket
between the motor and Side Plate.
6.1.4 Suspension Pins, Bolts and Shafts – Grease at least twice per year for normal usage (more frequently
for heavier usage or severe conditions).
6.2 Brake
6.2.1 The trolley motor brake is NOT adjustable.
6.2.2 Motor Brake Removal – Remove the four Bolts that attach the Motor Cover to the Motor Frame.
Carefully remove the Motor Cover, brake components, and Stator.
6.2.3 Brake Lining Inspection – The brake lining is designed for a long life and should provide years of
trouble-free service. If the brake lining is being inspected due to excessive trolley drift during operation
(see
Section 5.7 ), disassemble the motor brake and inspect all motor brake parts. Braking surfaces
should be clean, free of grease/oil and should not be glazed. Replace the Brake Drum and/or Motor
Cover if necessary. For normal inspections, the Brake Lining and Motor Cover wear should be
measured as follows.
1) Refer to Table 5-6.
2) Measure the distance "A" using calipers and a straight edge. Make sure the Brake Drum is square
against the Motor Cover. Place the straight edge across the edge of the Brake Drum and measure
from the straight edge to the mounting face of the Motor Cover.
3) Compare the measurement with the values listed in Table 5-6. Replace the Brake Drum and/or
Motor Cover if the "A" measurement is smaller than the discard limit.
6.2.4 Motor Brake Installation - After the brake is inspected, carefully place the Stator and brake components
into the Motor Frame. Be sure to reseal the Motor Cover to Motor Frame surface using a small bead of
liquid (hi-temperature) sealant. Install the Motor Cover attachment bolts.
6.3 Storage
6.3.1 The storage location should be clean and dry.
6.3.2 Care should be take to not damage any of the electrical power cords or fittings.
6.4 Outdoor Installation
6.4.1 For trolley and hoist installations that are outdoors, the trolley and hoist should be covered and
protected from the weather when not in use.
6.4.2 Possibility of corrosion on components of the trolley increases for installations where salt air and high
humidity are present. The trolley may require more frequent lubrication. Make frequent and regular
inspections of the unit's condition and operation.