ELECTRICAL COMPONENTS: PEDAL-START
GAS VEHICLE
Starter/Generator
20
-
+
2m
20
m
200
m
2k
200
200
200
200
20
2
200
m
500
20k
200k
2000
k
1000
OFF
WAVETEK
5XL
V
V
V
A
!
!
COM
200nA
MAX
1000 ---
750V
FUSED
1
3
2
1. 200 Ohms Setting 2. Commutator 3. Armature Shaft
497
Figure 20-11
Armature Ground Test
VISUAL INSPECTION OF FIELD COILS
If the insulation on the field coils appears blackened or charred, the serviceability of the coils is questionable. Burned
or scorched coil insulation indicates the starter/generator has overheated due to overloads or grounded or shorted coil
windings. Be sure the insulators are tight in the housing.
STARTER/GENERATOR REWORK
Any rework must be performed by a qualified technician. Starter/generator service specifications are listed in
the following table.
_
ITEM
SERVICE LIMIT
Commutator diameter (minimum)
1.60 in. (41 mm)
Concentric with armature shaft within
0.002 in. (0.051 mm)
Minimum commutator diameter for reslotting
1.65 in. (42 mm)
Undercut (Commutator must have a minimum diameter of 1.65 in (42 mm) for
reslotting):
0.050 in. (1.3 mm)
Dielectric strength
500 VAC for one minute
Armature insulation resistance
0.2M (ohms) at 500 VDC
Starter field coil resistance
0.006 to 0.01 ohms
Generator field coil resistance
4.5 to 5.5 ohms
STARTER/GENERATOR ASSEMBLY
1.
Slide the bearing retainer (32) onto the output end of the armature shaft (33)
.
2017 Carryall 500 and 700 Maintenance and Service Manual
Page 20-9
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