Komatsu 4D98 Series Shop Manual page 151

10. Alternator
Disassembly Procedures
1) Through bolt M5
Remove the M5 through bolt. Increase the
temperature at the center of the rear cover
by about 20°C using a soldering iron, in-
sert two flat-head screwdrivers between
the front cover and the stator core and
separate the assembly into the front side
(front cover and rotor) and the rear side
(rear cover and stator).
Note: Be careful not to damage the sta-
tor coil with the edges of the
screwdrivers.
2) Pulley nut
3) Pulley assembly
4) Rotor
Fix the rotor in a vice and remove the Ml5
(22 mm) pulley nut to separate the pulley,
front cover and rotor.
% Dimensions shown in ( ) indicate the
spanner sizes to be used.
5) Screw M4
6) Bearing retainer
7) Ball bearing
8) Front cover
Remove the M5 screw securing the bear-
ing retainer to separate the bearing re-
tainer, ball bearing and front cover.
9) Nuts M5 and M6
10) Rear cover
11) Lead wire assembly
Remove the M5 and M6 nuts securing the
diode and IC regulator. Press in the grom-
met and lead wire of the lead wire assem-
bly into the hole in the rear cover to sepa-
rate the stay and rear cover.
Fig. 1
Fig. 3
Fig. 4
1 o-5