Long 360 Series User Manual

The end shield (Fig. D.l/6) is a light alloy
diecasting. This shield accommodates a double
ball bearing, sealed inside and secured by a plate
(25)
which is retained by three screws (16). The
projection on the shield is provided with a hole;
which houses a steel bushing that the mounting
bolt goes through. The bushing is aimed to take
up any play that exists between alternator pro-
jection and bracket when installing the alter·
nator on the engine.
FIG. D.l/6 END SHIELD
16. Attaching screws; 25. Securing plate;
26. Bearing
The bracket shield (Fig. D.l/7a) is made up
of a
light alloy casting. On this shield are mounted
the rectifying unit and the brush holder
assembly.
The
rectifying unit consists of six silicon rectify.
ing diodes; three positive diodes (13, Fig. D.l/13)
and three negative
diodes (11) disposed in such a
way
to make a 3-phase rectifier bridge. The
positive diodes are pressed into a holder (12) in·
sulated against the ground and connected to B
plus terminal (18).
The negative diodes are also pressed into an
aluminum alloy holder (10) which is connected to
the minus-terminal (D, Fig. D.l/3). The D-Terminal
is grounded.
The positive diodes are marked in red, the
negative
diodes are marked in black letters.
The
diode holders. besides serving as support or
housing. also serve as a cooler to disperse the
heat
produced during operation.
The
diode and phase terminals are intercon-
nected through three screws (16) on a bracket
made of plastic material (7. Fig. D.l/14).
FIG. D.l/7 BRACKET SHIELD
FIG. D.l/7a BRACKET SHIELD AND DIODE
HOLDER UNIT
a. D •. ode holder unit; 30. Bracket shield
A centrifugal fan (23) installed on the shaft bet·
ween
pulley (1) and end shield (24) assures the in·
ternal
cooling of the alternator. The cooling air is
drawn in through the holes of the diode holder
shield, diode holders and rotor (Fig. 0.1114) and
the radiant surfaces for heat dissipation.
Electncal System· 190

Long 360 Series Specifications

General

Brand	Long
Model	360 Series
Category	Tractor
Language	English