Yamaha F350B - Checking the PTT Motor; Disassembling the PTT Motor; Removing the Reservoir

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PTT motor
Removing the reservoir
Before removing the reservoir, make sure
that the PTT rams are fully extended. Other-
wise, fluid could be expelled forcefully from
the PTT unit due to internal pressure.
Disassembling the PTT motor
1. Remove:
• Stator “1”
When removing or installing the armature
along with the motor base assembly, se-
cure the end of the armature shaft using a
pair of pliers. Otherwise, the armature
could separate from the motor base assem-
bly due to the magnetic force of the stator
and damage the brushes.
Checking the PTT motor
1. Check:
• Commutator
Dirty  Clean using 600-grit sandpaper
and compressed air.
2. Measure:
• Commutator diameter “a”
Out of specification  Replace the arma-
ture.
3. Measure:
• Commutator undercut “a”
Out of specification  Replace the arma-
ture.
4. Check:
• Armature continuity
Out of specification  Replace the arma-
ture assembly.
1
Standard commutator diameter
23.00 mm (0.9055 in)
Wear limit
22.00 mm (0.8661 in)
Standard commutator undercut
1.50 mm (0.0591 in)
Wear limit
1.00 mm (0.0394 in)
a
a