TM-9-2815-200-35
ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED ,12 - CYLINDER , ASSEMBLY ;MODELS AVDS-1790-2M (2815-856-4996), AVDS-1790-2A AND AVDS-1790-2AM (2815-856-9005)
TECHNICAL MANUAL; DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
TM-9-2815-200-35 - Page 83 of 779
CHAPTER 4
REPLACEMENT OF ENGINE ACCESSORIES, COMPONENT S
AND RELATED SERVICE OPERATION S
Section l. GENERAL
4-1.
Purpose
a .
This chapte r
of the manual cover s
replacement of engine accessories, and remova l
and replacement of components related to in -
spection, adjustment and service operation s
allocated to Direct Support maintenance per -
sonnel. Some accessories, engine components o r
service operations can be accomplished whil e
engine is installed in vehicle, but is dependen t
upon how accessible the item is. Engines which
have been removed from the vehicle for ac -
cessor y
replacement should be thoroughl y
cleaned before replacement of accessory is at -
tempted. Refer to pertinent technical manual s
for instructions on the removal or installation o f
the power plant and separation of the trans -
mission from the engine .
4-2.
Removal and Installation In-
structions
a. Illustrations.
The illustration sequence s
provided in the following subparagraphs depic t
the procedure for removal or installation of a
particular item or an adjustment and servic e
operation. When necessary, illustration s
covering variations between engine models ar e
included to clarify any differences in disassembly
or assembly procedures .
b. Tables.
This chapter has been grouped into
sections. Each section has a contents table fo r
easy reference for removing, cleaning, testing ,
installing and adjustment procedures require d
for a given operation and are listed by figur e
number under an appropriate heading in th e
table .
c.
Instructions.
The step-by-step procedure to
be followed for removal, installation, ad -
justment, or service operation is listed im -
mediately following each illustration .
d. Parts Identification.
Callouts will be used
to point out related parts involved in the removal
operation being performed. Callouts no t
mentioned in the instructions are related t o
subsequent installation procedures or are used a s
reference to other pertinent operations per -
formed in this technical manual .
Note.
Parts mentioned in the instructions tha t
accompany the operational sequence letters wil l
be called out separately on the illustration only
when required to further clarify the instructions ,
e. Special Instructions .
(1 )
“Notes and Cautions”.
Instructiona l
“Notes” or “Cautions” accompany some of th e
illustrations and are used to further define the
instructions ,
eliminate procedures that migh t
result in the equipment being damaged, or injury
to personnel .
(2)
Cleanliness.
Extreme care must b e
exercised to insure that dust and dirt, even i n
minute quantities, does not enter the engine .
Plug or cover all fuel and oil line connections to
prevent entry of dirt. Clean parts thoroughly and
coat all surfaces of bearings, shafts and contac t
surfaces with engine oil (OE). Surface must be
protected from dirt after oiling .
(3)
Gaskets.
Always use new gaskets an d
preformed packings when reinstalling engin e
components .
(4)
Torque tightening attaching hardware .
All hardware must be torque tightened t o
specified limits.
When a torque value is no t
specified in the text or on an illustration, refer to
Standard Torque Values, para 6-7. Specia l
torque values are specified in the text and / o r
illustrations. Refer also to Special Torqu e
Values, para 6-7 .
Note.
Do not vary from torque specified .
Under-torquing will result in premature failur e
of studs and bolts. Over-torquing can result in
yielding of bolts and studs .
(5)
Safety devices.
All bolts and nuts mus t
be secured with lock washers, lock nuts, ta b
washers, locking wire or cotter pins, as specified.
4-1
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