TM 5-3805-262-20
CHAPTER 5
ELECTRICAL SYSTEM MAINTENANCE
CHAPTER OVERVIEW
This chapter contains the information youll need to maintain the:
* Alternator and Drive Belts
* S t a r t er
* Instrument Panels
* Return-to-dig and Bucket Height Switches
* Auxiliary Steering Electrical System
* Light Systems
* Sending Units and Warning Switches
* Batteries and Cables
* Wiring Harnesses
It gives you information on how to repair or replace the components that
are within the scope of organizational maintenance.
Para
Alternator Drive Belts
Maintenance . . . . . . . . . . . . . . . . . . . 5-1
Inspection . . . . . . . . . . . . . . . . . . . . 5-1a
Replacement . . . . . . . . . . . . . . . . . . . 5-1b
Alternator Maintenance . . . . . . . . . . . 5-2
Testing . . . . . . . . . . . . . . . . . . . . . . .
Replacement . . . . . . . . . . . . . . . . . . .
Starter Maintenance . . . . . . . . . . . . . .
Starter . . . . . . . . . . . . . . . . . . . . . . .
Circuit Breakers and Relays . . .
Instrument Panels Maintenance . . . .
Left-hand Instrument Panel . . . .
Right-hand Instrument Panel . . .
Hourmeter/Tachometer . . . . . . . . . .
Return-to-dig and Bucket Height
Switches Maintenance . . . . . . . . . .
A u x i l i a r y S t e e r i n g E l e c t r i c al
System Maintenance . . . . . . . . . . . .
Relay Socket Assembly . . . . . . . . .
Auxiliary Steering Cables
and Harness . . . . . . . . . . . . . . . . .
Light Systems Maintenance . . . . . . . .
Front Flood and Driving Lights
Blackout Driving Light . . . . . . . .
5-2a
5-2b
5-3
5-3a
5 -3b
5-4
5-4a
5-4b
5-4c
5-5
5-6
5-6a
5-6b
5-7
5-7a
5-7b
P a ra
Rear Flood Lights . . . . . . . . . . . . .
5-7c
Stop and Tail Lights . . . . . . . . . . 5-7d
Blackout Stop and Tail Lights . 5-7e
Sending Units and Warning
Switches Maintenance . . . . . . . . . . 5-8
Engine Oil Pressure Switch . . . . 5-8a
Fuel Level Sending Unit . . . . . . . 5-8b
Water Temperature Sending
Unit . . . . . . . . . . . . . . . . . . . . . . . . 5-8c
Converter Temperature
Sending Unit . . . . . . . . . . . . . . . . 5-8d
Clutch Pressure Switch . . . . . . . . 5-8e
Neutral Start Switch . . . . . . . . . . 5-8f
Air Pressure Sender . . . . . . . . . . . 5-8g
Batteries and Cables Maintenance . 5-9
Batteries . . . . . . . . . . . . . . . . . . . . . 5-9a
Slave Receptacle . . . . . . . . . . . . . . 5-9b
Battery Cables . . . . . . . . . . . . . . . . 5-9c
Wiring Harnesses Maintenance . . . . . 5-10
Front Wiring Harness . . . . . . . . . . 5-10a
Rear Wiring Harness . . . . . . . . . . . 5-10b
Blackout Lights Wiring Harness 5-10c
Cab Upper Wiring Harness . . . . . . 5-10d
Cab Lower Wiring Harness . . . . . . 5-10e
Cab Console Wiring Harness . . . . 5-10f
5-1
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