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 303 of 779
Note.
The special coil screw lock inserter tools
listed in special tool table 2-1 must be used when
installing the self-locking thread type inserts .
These special inserters are further identified by
painted areas marked either with a red handle or
a red stripe around the body .
1. Thread new insert (A) into the threaded guide of
inserter -5120-797-2407 by slowly turning the pilot
until insert is flush with the end of the tool.
2. Insert the pilot of the screw thread inserter (B) - 5120-
797-2407 into the threaded hole in cylinder, with face
of the inserter resting solidly against the casting as
shown.
3. Slowly turn handle (C) of pilot clockwise until no
further resistance is felt. The insert will then be flush
with cylinder casting. Remove inserter.
Figure 6-3. Installing helical-coil threade d
insert in cylinder assembly using scre w
thread inserter-5120-797-2407 .
6-6. Assembly
a. General.
Extreme care must be exercised in
all assembly operations to insure satisfactor y
engine performance. General rules for assembly
are outlined below. Step-by-step procedures fo r
assembling the various components are covered
in the paragraph relating to the specific com -
ponent .
b. Precautionary Rules .
(1) Cleanliness is essential in all assembly
operations. Dirt and dust, even in minut e
quantities, are abrasive. Parts must be cleaned as
specified and kept clean. Wrap or cover part s
and components when assembly procedures ar e
mot immediately completed .
(2) Coat all bearings, shafts, and all contact
surface s
with engin e
oil
(OE)
to
insure
lubrication of parts during initial engine starting.
(3) Always use new gaskets and preformed
packings when assembling engine .
(4) Use flat washers under all lockwashers ,
nuts and bolts to protect aluminum surfaces .
(5) Most bolts, cap screws, and nuts mus t
be secured with lockwashers, tab washers ,
locking wire ,
or cotter pins, depending o n
method of locking specified .
(6) Whenever a locking method is no t
specified for bolts and cap screws, the mid-grip
helical-coil threaded inserts into which the bolt s
or screws are threaded serve as the lockin g
device .
(7) It is also important that all hardware be
tightened to the specified torque. Refer to torque
specifications, paragraph 6-7 .
6-7. Torque Specification s
a. Standard Torques for Studs and Bolts .
Apply a light film of anti-seize thread compound
FSN 9150-663-1770 to stud, bolt, cap scre w
threads, and contact face of nuts, bolt heads, and
cap screws. Avoid excessive amounts of com -
pound in blind tapped holes .
Size
Torque
(dia. in.)
(lb-in.)
1/4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75-100
5/16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..150-175
3/8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..275-325
7/16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..400-450
1/2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..550-600
9/16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..800-850
b. Special Torques for Studs and Bolts.
Appl y
a light film of anti-seize thread compound FS N
9150-663-1770 to stud, bolt, cap screw threads ,
and contact face of nuts, bolt heads, and ca p
screws (except as noted). Avoid excessiv e
amounts of compound in blind tapped holes .
Crankcase Tie-rod Bolts . . . . . . . . . . .
..640
Main Bearing Stud . . . . . . . . . . . . .
..450
Crankcase Main Bearing Stud Nut s
(Procedure) :
(1) Tighten all nuts to . . . . . . . .
.500
(2)
Tighten
all
nuts
to
.
.
.
.
700-825
(3) Check stud stretch, it must be 0.019 -
0.022 in .
6-9
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