HEAVY DUTY ALTERNATORS
screw in the access hole. If the above procedures have
no effect on the output voltage, the regulator or alternator
is defective. Perform TROUBLESHOOTING procedures
to find cause of problem.
Remove pulley nut, pulley, fan, key and spacer.
Use a suitable puller to avoid damage to the
shaft and threads.
Remove four screws and carefully lift regulator
free of housing. Remove red and black leads
from regulator, noting their position to facilitate
reassembly (See Figure 6).
Figure 6 - Removing Regulator.
Remove nuts and washers from "IGN." terminal.
Loosen inner nut, which will allow blue regulator
lead to be withdrawn from under head of
terminal screw. Remove regulator (See Figure
Lift brush and spring assemblies out of housing.
Remove three self locking nuts and through
Remove rotor and drive end housing assembly
from stator and slip ring end housing assembly.
If drive end housing binds on stator, loosen by
tapping gently on mounting ear with fibre
hammer. Be sure that drive end housing
separates from stator and that stator remains
attached to slip ring end housing to avoid
damage to stator leads (See Figure 7).
Remove three nuts which secure stator leads to
terminals and remove stator.
Figure 7 - Removing Drive End Housing and Rotor.
Remove nuts from positive and negative output
terminal bolts and remove the bolts. Note the
location of the red and black regulator leads on
the heat sinks (See Figure 8).
Figure 8 - Heat Sinks and Capacitor.
Remove three hex head screws and remove
capacitor connected between the heat sinks
(See Figure 8).
Remove regulator housing. Note location of
gasket which seals brush compartment (See
CTS-4043A - Chapter II - Page 5