6D3-14 STARTING AND CHARGING SYSTEM
7. To remove the pulley, mount an 8mm Allen key in the vice
with the short end upwards, place a 24mm ring spanner on
the puley nut, position the internal hexagon of the rotor shaft
onto the Allen ken, loosen the nut and remove the pulley.
Note: the pulley has an integral boss which locks up against
the bearing,
therefore no thrust collar is provided.
8. Removing the rotor assembly. Remove the four retaining
screws from the drive end housing, withdraw the rotor
complete with the bearing.
Note: the rotor must not be pressed from the drive end housing
using a press as the bearing retaining plate and drive end
housing will be damaged or distorted. Parts removed in this
way must be replaced if the integrity of the generator is to be
maintained.
9. Remove the drive end bearing from the rotor shaft using a
chuck type puler, take care not to distort the fan assembly
during this process.
10.Remove the slipring end bearing using the same meghod
as in 9.
Clean
Thoroughly clean all components except the rotor and stator
with an approved cleaning agent. Ensure that all traced of oil
and dirt are removed. If an abrasive cleaner is used to remove
scale and paint from the housings take care not to abrade the
bearing and mounting spigot surfaces. The rotor and stator
must be cleaned with compressed air only, the use of solvents
could cause damage to the insulating materials.
Inspection
1. Rectifier assembly
The followoing test equipment is required.
The recitifier assembly is not repairable and must be replaced
if a faulty diode is detected during inspection.
(a) Adiode tester where the DC output at the test probes does
not exceed 14 volts or in the case of AC testers 12 volts
RMS. This is to ensue that when inspection rectifiers fitted
with zener power diodes the forward and reverse checks
are completer and are not masked by the diode turning on
due to the zener breakdown voltage.
(b) A zenere diode tester with a DC output in excess of 30
volts, the tester should also incorporate internal current
limiting set to 5 Ma. to prevent high currents during
inspection.
(c) Diodes can be destroyed during service due to high
temperature and overload, open circuits are usually a result
of excessive voltage.
To Next Page
Loading...
Need help?
General
