CHAPTER 19. ENGINE TUNE-UP

TM 9-2815-224-34&P

CHAPTER 19

ENGINE

TUNE-UP

Page

Para

Contents

19-1

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Exhaust Valve Clearance Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19-1

19-2

Engine Brake Retarder Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19-4

19-3

Fuel Injector Timing Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19-6

19-4

Governor Gap Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19-8

19-5

19-9

Injector Rack Control Lever Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19-6

Starting Aid Screw Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19-19

19-7

Throttle Delay Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19-21

19-8

Fuel Modulator Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19-22.1

19-8.1

Engine Speed Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19-22.4

19-9

19-27

Engine Speed Control Adjustment (M984) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19-10

19-31

19-11

EngineCompressionCheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section I. INTRODUCTION

19-1. GENERAL. This chapter covers tune-up instructions for the 8V92TA engine. Adjustments are given

for exhaust valve clearance, brake retarder adjustment, fuel injector timing, governor adjustments, injector rack

control lever, starting aid screw, throttle delay, engine speed adjustments, and compression check. The

subassemblies and parts which must be removed before engine tune-up will be referenced to other paragraphs

of this manual, TM 9-2320-279-10, TM 9-2320-279-20, or TM 9-2320-279-34.

Section II. ENGINE TUNE-UP ADJUSTMENTS

Engine Tune-Up Instructions

EXHAUST VALVE CLEARANCE ADJUSTMENT.

19-2.

This task covers:

a. Adjustment

b. Follow-on Maintenance

INITIAL SETUP

Equipment Condition

Models

Condition Description

TM or Para

All

TM 9-2320-279-10 Valve rocker covers

removed.

Test Equipment

None

Special Environmental Conditions

Special Tools

None

Gage, feeler 007958

General Safety Instructions

Supplies

None

Level of Maintenance

Personnel Required

Direct Support

MOS 63W, Wheel vehicle repairer (2)

References

None

19-1

Change 2