Service Manual

325/328 Excavator
Operation and Maintenance Manual 74
ELECTRICAL SYSTEM
Description
Figure PM-29
The Excavator has a 12 volt, negative ground electrical
system. The electrical system is protected by fuses
located under the right side cover of the Excavator
(Item 1) [Figure PM-29]. The fuses will protect the
electrical system when there is an electrical overload. The
reason for the overload must be found before starting the
engine again.
The battery cables must be clean and tight. Check the
electrolyte level in the battery. Add distilled water as
needed. Remove acid or corrosion from the battery and
cables with a sodium bicarbonate and water solution.
Put Battery Saver P/N 6664458 or grease on the battery
terminals and cable ends to prevent corrosion.
WARNING
Batteries contain acid which burns eyes and skin on
contact. Wear goggles, protective clothing and rubber
gloves to keep acid off body.
In case of acid contact, wash immediately with water.
In case of eye contact get prompt medical attention
and wash eye with clean, cool water for at least 15
minutes.
If electrolyte is taken internally drink large quantities
of water or milk! DO NOT induce vomiting. Get
prompt medical attention.
W-2065-1296
Fuse And Relay Location
A sticker is inside the cover to show location and amp
ratings.
Remove the cover to check or replace the fuses and
relays.
Figure PM-30
The location and sizes are shown below and
[Figure PM-30].
Always replace fuses using the same type and capacity.
P-49427
1
REF DESCRIPTION AMP REF DESCRIPTION AMP
1 Not Used - - 11 Lights 20
2 Heater 25 12 ACC Plug 15
3 Ignition 5
4 Fuel Solenoid 25
5 Wiper 5
6 Switch Power 20
7 Alternator/Heater 25
8ACD 25
9 Controller 25
10 ACD 25
REF DESCRIPTION
E Switch Power
F Fuel Solenoid
G Lights
H Glow Plug
JStarter
B-19812