Installation Instructions

81700·82100·82400 WSM,11770
II Alternator
9 ELECTRICAL SYSTEM
Stator
1. Measure the resistance with an ohmmeter across each lead
of the stator coi I.
2. If the measurement is not within factory specification,
replace it.
3. Check the continuity across each stator coil lead and core
with an ohmmeter.
4. If infinity is not indicated, replace it.
0109F317
Resistance
Factory spec. Less than 1.0 ohms
C095F153
C095F154
C095F155
Rotor
1. Measure the resistance across the slip rings.
2. If the resistance is not the factory specification, replace it.
3. Check the continuity across the slip ring and core with a an
ohmmeter.
4. If infinity is not indicated, replace it.
Ie--R_e_si_st_an_c_e I_F_ac_t_or_y_sp_e_c_. 1_2_.9_o_h_m_s _
Slip Ring
1. Check the slip ring for score.
2. If scored, correct with an sand paper or on a lathe.
3. Measure the outside diameter of slip ring with a vernier
caliper.
4. Ifthe measurement exceeds the allowable limit, replace it.
Factory spec.
14.4 mm
0.567 in.
Slip ring
0.0.
12.8mm
Allowable
limit
0.504 in.
Brush Wear
1. Measure the length of brush with a vernier caliper.
2. Ifthe measurement is less than allowable limit, replace it.
3. Make sure that the brush moves smoothly.
4. If the brush is defective, replace it.
Factory spec.
10.5mm
0.413 in.
8rush length
8.4mm
Allowable limit
0.331 in.
C144F037
Rectifier
1. Check the continuity across each diode of rectifier with an
ohmmeter.
2. The rectifier is normal if the diode in the rectifier conducts in
one direction and does
not conduct in the reverse direction.
II IMPORTANT
• Do not use a 500 V megger for measuring because it will
destroy the rectifier.
9-S19