Section 06: ELECTRICAL
PA1553
35
5.1 TWIN BOSCH ALTERNATORS
INSTALLATION
If the alternators needed to be removed, reinstall
as follows. Refer to figure 20 for installation and
to figure 21 for tightening specifications:
1. Install alternator mounting bracket (1, figure
20) to the gear case. Use the four flanged
phosphor alloy bolts on the pulley end of the
bracket and the flanged nuts at the
transmission end of the bracket;
2. Bolt the alternators to the bracket using the
three inch bolt at the top of the upper
alternator (2, fig 20) and flanged bolts at the
other mounting bosses (3 and 4, figure 20).
Tighten the bolts in the sliding sleeves (4,
figure 20) last as they will adjust to prevent
breaking the alternator mounting bosses
upon final tightening. Repeat for the second
alternator;
3. On the drive shafts of both alternators,
install key, pulley, spring washer and nut.
Tighten to 220 Lbf-ft (300 Nm);
NOTE
Final tightening of the pulleys can be
performed once the belt is installed. This will
help keep the pulley from turning when
tightening.
4. Install the snubber bracket (5, fig. 20) using
three flanged bolts. Do not tighten the
adjustment bolts on the snubber until after
final tightening;
5. Install the compressor belt idler pulley (6,
fig. 20) as shown. A stud inserts into one of
the mounting holes of the pulley assembly.
Fasten this one using a nut and bolts for the
other two.
6. DELCO ALTERNATOR
The 24 volt charging system consists of a belt
driven, oil-cooled, brushless alternator, a 24 volt
voltage regulator, an alternator relay and a 12
volt system that includes a 12 volt, 100 amp
equalizer. The components used in this system
are described under the applicable headings
hereafter.