Inspection Of Pt Motor - TOHATSU MFS 25D Service Manual

Bracket

16) Inspection of PT Motor

1. Measure the length of the brush.
Replace the motor assy if the specified value or less.
Brush Wear Limit a:
6 mm ( 0.236 in)
2. Check the electrical conductivity of the brush and circuit
breaker.
Replace the motor assy if there is no electrical conductivity.
• Do not pull the PT motor lead wires out of
the brush holder.
• Do not press the bimetal b with a strong
force as this will affect the operation of
the circuit breaker.
3. Measure the diameter of the commutator.
Replace the motor assy if the specified value or less.
Commutator Diameter Limit c:
18.5 mm (0.728 in)
4. Check the conductivity of the armature.
Replace the motor assy if outside the specified value.
Conductivity of Armature
Commutator Section
Commutator Section d
Armature Core Section e
Commutator Section d
Armature Shaft Section f
5. Check the brush holder for cracks or damage, and replace
the motor assy if necessary.
7-42
CAUTION
Conductivity
No conductivity
No conductivity
b
c
d
f
e
4st 25/30 2022