9-39
PTT motor
Checking the brush
1. Measure:
• Brush length
Below specification Replace the brush.
2. Check:
• Motor base assembly continuity
No continuity Replace.
3. Check:
• PTT motor base assembly
Cracked/damaged Replace the PTT
motor assembly.
Checking the reservoir
1. Check:
• Reservoir
Cracked/damaged Replace.
Checking the filter
1. Check:
•Filter
Dirt/residue Clean.
Clogged/damaged Replace.
Assembling the PTT motor
Do not apply grease or oil to the commuta-
tor of the armature.
1. Assemble:
• Motor base assembly
• Oil seal
• Washer
• Circuit breaker “1”
• Spring “2”
Armature continuity
“a” “b” “c” “d”
a. Standard brush length
b. Wear limit
Standard brush length
11.50 mm (0.4528 in)
Wear limit
6.5 mm (0.26 in)
a
b
c
d
b
a
Sb
Lg
a
b
c
d
e
f
Motor base assembly continuity
“a” “b” “c” “d” “e” “f”
1
1
1
1
2
2
2
2