When installing the alternator rotor, align the rotor mark
[A] with the left crankcase projection [B].
Apply molybdenum disulfide oil solution to the threads
and seating surface of the alternator rotor bolt.
Install the washer.
Confirm the alternator rotor fit or not to the crankshaft
before tightening it with specified torque.
Install the rotor bolt and tighten it with 69 N·m (7.0 kgf·m,
51 ft·lb) of torque.
Remove the rotor bolt and washer.
Check the tightening torque with M20 bolt [A] in the fly-
wheel puller assembly.
Special Tool - Flywheel Puller Assembly, M38 × 1.5/M35 ×
If the rotor is not pulled out with 20 N·m (2.0 kgf·m, 15
ft·lb) of drawing torque, it is installed correctly.
If the rotor is pulled out with under 20 N·m (2.0 kgf·m, 15
ft·lb) of drawing torque, clean off any oil dirt or flaw of the
crankshaft and rotor tapered portion, and dry them with
a clean cloth. Then, confirm that it is not pulled out with
Tighten the alternator rotor bolt [A] while holding the alter-
nator rotor steady with the rotor holder [B].
Special Tools - Grip [C]: 57001-1591
Rotor Holder: 57001-1674
The rotor holder is prevented from turning by using the
suitable M10 bolt [D] and footpeg bracket bolt hole.
Torque - Alternator Rotor Bolt: 160 N·m (16.3 kgf·m, 118
Install the alternator cover (see Alternator Cover Installa-
There are three types of alternator failures: short, open
(lead burned out), or loss in rotor magnetism. A short or
open in one of the stator coil lead will result in either a low
output, or no output at all. A loss in rotor magnetism, which
may be caused by dropping or hitting the alternator, by leav-
ing it near an electromagnetic field, or just by aging, will re-
sult in low output.
ELECTRICAL SYSTEM 16-45