Storage :- Store in cool dry place away from any hazardous
atmosphere, oil, mist, vapor etc.
Commutator :- Keep clean & protect from carbon deposition,
dirt, any Other depositions like water etc. Cleaning by
dry cloth / thermocol (dry) piece. Check excessive wear
out of commutator.
Brushes :- Regular / periodic checking of brushes. Replace
brushes after 60 % consumption of its length.
Bearings :- Check for smooth running
TROUBLE
SHOOTING (TACHO) :
Problem
faced
Area
concerned
Corrective
action
No output from tacho
Armature
Brush & commutator
Connecting wires
Check armature resistance for continuity.
Check brush contact with commutator.
Check wiring.
Tacho
mechanically
jam
Bearing
Check for bearing
jam, replace if necessary.
Check for any other damage / breakage.
Variation in output from
Tacho
Brushes
Commutator
Armature
Check seating of brush, replace if
necessary.
Check / Clean commutatorCheck wiring & other contact
points.
Check armature for short / open windings. Repair or
replace the armature.
Lateral Play in shaft
Bearing
Bearing housing
Check for bearing status Check bearing
housing flange / end cover replacement may be required.
