TM-9-2320-280-34
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
JANUARY 1996
TM-9-2320-280-34 - Page 58 of 1258
TM 9-2320-280-34
CHAPTER 3
ENGINE MAINTENANCE
SECTION I.
GENERAL ENGINE MAINTENANCE
3-1.
INTRODUCTION
This chapter contains instructions for replacement and repair of 6.2 L and 6.5 L engine components at the
Direct Support maintenance level. Some subassemblies and parts must be removed before engine
components
can be accessed. They are referenced to other paragraphs of this manual or TM 9-2320-280-20.
3-2.
GENERAL ENGINE MAINTENANCE TASK SUMMARY
TASK
PAGE
PARA.
PROCEDURES
NO.
3-3.
Engine Mount and Insulator Maintenance
3-2
3-4.
Left Cylinder Head Repair
3-8
3-5.
Right Cylinder Head Replacement
3-12
3-6.
Crankshaft Pulley Replacement
3-14
3-7.
Torsional Damper Replacement
3-15
3-8.
Rocker Arm Shafts and Pushrods Replacement
3-17
3-9.
Hydraulic Valve Lifter Replacement
3-18
3-10.
Timing Chain Cover, Timing Chain, and
3-20
Drive Sprockets Maintenance
3-11.
Left Rocker Arm Cover Maintenance
3-24
3-12.
Right Rocker Arm Cover Maintenance
3-26
3-13.
Front Cover Oil Seal Replacement
3-28
3-14.
Oil Pump Drive Replacement
3-29
3-15.
Rear Main Oil Seal Replacement
3-30
3-16.
Oil Pump Maintenance
3-34
3-17.
Intake Manifold Maintenance
3-36
3-18.
Glow Plug Tip Removal (Damaged or Broken)
3-38
3-19.
Engine Injection Pump Timing
3-40
3-20.
Engine Run-In
3-44
3-1
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