Harrington Hoists and Cranes Series 3 End Truck - Manual (Page 41)

Table 5-3 Inspections Methods and Criteria
Crane
Component
Item Method Criteria Action
End Truck 6. End truck
Track wheel (Underhung
End Trucks) Measure. Diameter must not be less than "when
worn" value in Table 5-4. And, for
geared and motorized end trucks the
diameter of the drive wheels on the left
end truck must not be different from
the diameter of the drive wheels on
the right end truck by more than the
value in Table 5-5.
Flange dimension (for geared and
motorized end trucks only) must not
be less than "when worn" in Table 5-4.
Replace.
Track Wheel (Top
Running End Trucks) Measure Diameter must not be less than "when
worn" value in Table5-4. And for
geared and motorized end trucks the
diameter of the drive wheel on the left
end truck must not be different for the
diameter of the drive wheel on the
right end truck by more than the value
in Table 5-5. Replace.
Track Wheel Gear Teeth
(geared and motorized
end trucks only) Visual Teeth should not be cracked,
damaged, or excessively worn. Replace.
Missing or incorrectly
positioned snap rings Check visually No snap rings must be missing or out
of position. Replace or re-install as
necessary.
Guide roller wear Measure. Roller diameter must not be less than
the "when worn" value in Table 5-6. Replace.
Lubrication Check visually. The track wheel teeth and teeth of the
pinion L must be sufficiently lubed. Grease where necessary.
Bolts/fasteners Check tightness or
torque. Bolts and fasteners must be
sufficiently tight. Tighten where necessary.
Gear Motor 7. Gear Motor
Bolts Check tightness or
torque. Bolts should be sufficiently tight. Tighten where necessary.
Outer appearance Check visually. No cracks or other damage should be
detected Replace parts where
necessary.
Damage to bearings Try turning by
hand. Bearings should turn smoothly. Replace parts where
necessary.
Braking Start and stop the
crane. The crane must come to a smooth
stop within 10% of its traveling speed
when the brakes are applied. Adjust the left and right
motor brakes. Refer to
Section 7.
Replace parts where
necessary.
Lubrication Overhaul and
check visually. Parts must be sufficiently lubricated. Grease or degrease where
necessary.
Refer to Section 7 Lubricated parts must not be overly
dirty or contaminated with foreign
matter. Replace parts where
necessary.
Motor Brake Measure Brake disc wear should be less than
discard (Table 5-7). If wear is beyond discard
limit, replace.
41