Harrington Hoists and Cranes MR Trolley - (MR2) - Manual (Page 40)

5.7 Inspection Methods and Criteria
5.7.1 This section covers the inspection of specific items. The list of items in this section is based on those
listed in ANSI/ASME B30.16 for Frequent and Periodic Inspection. In accordance with ANSI/ASME
B30.16, these inspections are not intended to involve disassembly of the trolley. Rather, disassembly
for further inspection would be required if frequent or periodic inspection results so indicate. Such
disassembly and further inspection should only be performed by a qualified person trained in the
disassembly and re-assembly of the trolley.
Table 5-3 Trolley Inspection Methods and Criteria
Item Method Criteria Action
Functional operating
mechanisms. Visual, Auditory Mechanisms should be properly adjusted and
should not produce unusual sounds when
operated. Repair or replace
as required.
Braking System
Operation Function Trolley must come to a smooth stop within 10% of
its traveling speed when the pendant button is
released. Repair or replace
as required.
Housing and
Mechanical
Components Visual, Auditory,
Vibration,
Function Trolley components including, suspension shafts,
track wheels, track wheel axles, clevises,
connection yokes, suspension bolts, shafts, gears,
bearings, pins, rollers, and bumpers should be free
of cracks, distortion, significant wear and
corrosion. Evidence of same can be detected
visually or via detection of unusual sounds or
vibration during operation. Replace.
Side Plates Visual Must be free of significant deformation Replace.
Bolts, Nuts, Snap
Rings, and Split Pins Visual, Check
with Proper Tool Bolts, nuts, snap rings and split pins should not be
loose. Tighten or replace
as required.
Track Wheel - Tread Visual, Measure Diameter of the inside and outside tread surface
should not be less than the discard value shown in
Table 5-4. Replace.
Track Wheel - Gear Visual Teeth should not be cracked, damaged, or
excessively worn. Replace.
Side Rollers - Wear Visual, Measure Diameter should not be less than the discard value
shown in Table 5-5. Replace.
Suspension Shaft Visual, Measure Suspension shaft should not be bent. Diameter
should not be worn by 10% or more. Replace.
Motor Brake Visual, Measure Brake lining dimension “A” should not be less than
discard value listed in Table 5-6. Refer to Section
6.3 for gaining access to motor brake and
inspection procedures. Braking surfaces should
be clean, free of grease/oil and should not be
glazed. Replace.
Contactor Contacts Visual Contacts should be free of significant pitting or
deterioration. Replace
VFD
(Dual Speed only) Visual, Function There should be no fault codes (Reference
Section 3.5.) Replace as
needed.
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