TL33 Work Platform 4-18
REASSEMBLY
1. Install new brushes and be sure they are free in the
holder. Install brush with the lead wires positioned as
when received.
2. Place commutator cover on a work bench with brush
assembly facing upward.
3. Place the bearing spring into the bearing bore.
4. Take a complete armature assembly, including
bearings, and insert commutator end bearing into the
bearing bore.
Note: Do not re-use bearings which have been removed
from armature shaft. Keep assembly in a vertical position.
Use extreme care not to damage armature with bearing
pullers. New bearings should be installed by pressing
inner race of bearing onto proper position on armature
shaft.
5. Set the brushes to final position and lock with springs.
6. Place the complete stator down over the vertical
armature, and into position on the commutator cover.
7. The stator assembly must be placed in a definite
relationship with the commutator covers in order to
obtain a neutral brush setting. There is a match-mark
on both items. These two marks must line up exactly.
Rotate until they do.
8. Assemble the pulley end cover in the proper
relationship. Insert mounting bolts and tighten
alternately to ensure a good mechanical alignment.
9. Spin the shaft by hand to see if it is free. Be sure motor
leads (if used) are not touching together. If the leads
are touching, a generator action will give the effect of
friction in the motor. A no-load test can now be
performed. At rated voltage, observe the no-load
current. It should be less than 20% of the nameplate
full load current. Anything higher indicates:
• Brushes are not on neutral setting
(check matchmarks for exact alignment)
• Faulty armature
Every 500 working hours
Brushes - Check the wear, the correct seating, and
the regularity of the working surface.
Springs - They should not be burned or damaged,
and they must apply a constant and equal
pressure on the brushes.
Commutator - The surface must be clean and regular
without grooving or burning.
Every 1000 working hours
Bearings- All the bearings are fitted with a double
shield and lubricated with high temperature
grease.
Check for leaks, vibration and noise. If
necessary replace with bearings of
Identical type.
Seals - Check that hydraulic seals are in perfect
condition.
Screws - Check that all nuts, particularly the cable nuts
and screws are tight.
General - Check that foreign bodies or dirt have not
entered the motor.
Check that the ventilation holes are clean and
not obstructed.
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