SERVICE REPAIR (Eur)
S2.00XM S2.25XM S2.50XM S3.00XM S3.20XM [D187]
This section has a description and the repair procedures
for the alternator with a voltage regulator as part of the
When using an arc welder, always disconnect the
ground lead from the lift truck battery to prevent
alternator or battery damage. Attach the welding
ground clamp as close to the weld area as possible to
prevent welding current from damaging the
The diodes and resistors in the electrical system can
be damaged if the following cautions are not
• Do not disconnect the battery when the engine
is running. The voltage surge can damage the
diodes and resistors in the electrical system.
• Do not disconnect an electric wire before the
engine is stopped and the switches are “OFF”.
• Do not cause a short–circuit by connecting the
electric wires to the wrong terminals. Make
sure a correct identification is made of the wire
before it is connected.
• Make sure a battery is the correct voltage and
polarity before it is connected.
• Do not check for current flow by making a
spark because the electronic components can
NOTE: Information on alternators manufactured out-
side the United States is in the SRM (service repair
manual) sections for lift trucks that use those alterna-
(See FIGURE 1. and FIGURE 2.)
NOTE: For this SRM section, the alternators are in two
groups, Type A and Type B. The two types are very simi-
lar, but the Type A alternators have a set of three diodes
(diode set) as well as the diode bridge. The Type B alter-
nator has zener diodes as part of the diodes in the diode
bridge. This alternator does not have a diode set, but
does have an additional fan inside the rear housing. The
basic operation of both types is very similar.
The alternator generates an alternating current when the
engine is running. The alternator is either ON or OFF.
The alternator generates maximum current when it i