Download  Print this page

Alternator Inspection - Kawasaki ZR-7S Service Manual

Hide thumbs

Advertisement

Charging System
Alternator Inspection
There are three types of alternator failures: short circuit,
open circuit, and demagnetized rotor. If there is a short or
open circuit in the coil, the output decreases, or is at zero.
A
rotor
could become demagnetized if it is dropped, struck,
left apart from the stator, or simply through aging, leading
to reduced output.
• Measure the alternator's no-load output voltage in the fol·
lowing sequence:
OTum the ignition switch OFF.
ORemove the left side cover (see Frame chapter)
ORemove the alternator lead connector [A].
OConnect the hand tester as shown in Table 1.
Table 1. Alternator No-Load Output Voltage
Connecting terminal
Standard
Tester
Tester positive
Tester negative
@4000
Range
(+)
terminal
(-) terminal
r/min (rpm)
AC250V
One yellow lead
Another yellow
35 V or
lead
more
OStart the engine.
OMaintain the engine speed at 4 000 r/min (rpm).
OMeasure the voltage (total 3 times).
*If the measurement is considerably lower than the stan-
dard, stop the engine, and inspect the stator coil.
• Measure the stator coil resistance.
OConnect the hand tester as shown in Table 2.
Table 2. Alternator No-Load Output Voltage
Connecting terminal
Tester
Tester positive
Tester negative
Standard
Range
(+)
terminal
(-) terminal
x
1 0
One yellow lead
Another yellow
0.1 - 0.8 0
lead
ORead the measurement (total 3 tImes).
*11 the measurement is greater than the standard, replace
the stator.
• Set the hand tester to x 1
n
range and connect it between
the respective yellow wire in the female connector of the
alternator and the frame to measure the resistance.
*11 the tester reads a value other than infinity (00), replace
the stator.
*If the output voltage is out of standard even if the stator
coil and wires appear normal, replace the alternator rotor.
ELECTRICAL SYSTEM 14-27

Advertisement

Table of Contents

   Also See for Kawasaki ZR-7S

Comments to this Manuals

Symbols: 0
Latest comments: