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ELECTRICAL COMPONENTS: 850 GASOLINE VEHICLE
Starter/Generator
Page 14-8
2007-2008 XRT 800, 810 and 850 Maintenance and Service Manual
14
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.
Figure 14-12 Armature Ground Test
ITEM
SERVICE LIMIT
Commutator diameter (minimum)
1.535 in. (39 mm)
Concentric with armature shaft
within
0.002 in. (0.051 mm)
Limit depth of cut when
machining commutator
0.007 in. (0.2 mm)
If undercut of segment insulator
is less than 0.016 inch
(0.406 mm), then it should be
undercut to:
0.031 in. (0.8 mm)
Dielectric strength
500 VAC for one minute
Armature insulation resistance
0.2M ohms at 500 VDC
Starter field coil resistance
0.006-0.01 ohms
Generator field coil resistance
4.5-5.5 ohms
COMMUTATOR
ARMATURE
ARMATURE SHAFT
200 (OHM) SETTING
-
+
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
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