APPENDIX E ELECTRICAL, HYDRAULIC, AND PNEUMATIC DIAGRAMS

TM 9-2320-285-24-2

APPENDIX E

ELECTRICAL, HYDRAULIC, AND PNEUMATIC DIAGRAMS

Section I. INTRODUCTION

E-1. GENERAL

This appendix contains hydraulic diagrams, a pneumatic diagram, and an electrical diagram. Also included in this

appendix is a description of how to use the electrical diagram as an aid to troubleshooting (section II). Section III contains

the diagrams (figures E-2 thru E-7).

E-2. DIAGRAMS

The hydraulic diagrams are located in figures E-2 thru E-5. Figure E-3 shows the hydraulic oil flow when the fifth wheel is

raised. Figure E-4 shows the hydraulic oil flow when the fifth wheel is lowered. The pneumatic diagram is located in figure

E-6, and the electrical diagram is located in figure E-7.

Section II. HOW TO USE ELECTRICAL SCHEMATIC

AS AN AID TO TROUBLESHOOTING

E-3. OVERVIEW

a. Figure E-7, your Electrical Diagram, is designed to help you understand the electrical circuits associated with this

vehicle. It is generally referred to as a "schematic" and uses "symbols" to represent real components. It is not drawn to

scale (as in a blueprint) nor does the location of the symbols represent actual location of components in the vehicle. It is a

simple "picture" of how the circuits and components are connected together.

b. To quickly find a malfunction or trouble in the electrical system and repair it requires an understanding of how the

system operates and a method for checking it out. "Troubleshooting" provides the "method" for check out procedures and

your technical manual (Troubleshooting tables and schematics) provides the "operating principles".

E-4. TROUBLESHOOTING

Troubleshooting is the systematic (step-by-step) isolation of a malfunction or trouble to the faulty component, harness

connector, or wire. It is a guide that helps develop a routine or "way" of finding troubles in any electrical system or circuit.

As you become more familiar with this vehicle and gain experience, you will find ways to shorten these procedures and

decrease down time. BEFORE you attempt to make any repairs or checks, do the following:

E-1