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 42 of 779
the disassembly of the engine into subassemblies.
Chapter 6 gives information for cleaning, in-
spection, handling of parts and general repair
procedures including overhaul standards, and
the disassembly and assembly of the various
engine subassemblies and components.
d. Chapter 7.
This chapter covers the
assembly of the engine from subassemblies, and
provides pertinent assembly information
peculiar to the engine, including installation of
accessories.
e. Chapter 8.
This chapter outlines the test
and adjustment procedures required to insure
that an engine has been properly repaired. Also
included in this chapter is the information
relating to the engine container. Complete in-
structions concerning the removal or installation
of the engine, repair of the container and engine
preservation and storage have been covered.
f. Appendixes and Indexes.
( 1 ) Following Chapter 8 is an alphabetical
index for maintenance services outlined in the
manual. This index provides a rapid reference to
a paragraph and figure in accordance with the
subject operation.
(2) Appendix A provides a list of
publications which are related to the materiel or
its maintenance.
(3) Appendix B contains an introduction, a
list of parts and special tools, and a Federal
Stock Number index.
(4) At the back of Appendix B of the
manual are fold-out illustrations which provide
rapid reference for repair parts identification.
These illustrations are numerically keyed to the
items in the repair parts text, and also include
alphabetical keys for points of measurement for
the maintenance manual overhaul standards.
1-4. Organizational, Direct Support,
General Support, and Depot Maintenance
Allocation
Refer to the pertinent maintenance allocation
chart in
the Organizational
Maintenance
Manuals (para 1-2).
1-5. Forms, Records and Reports
For listings of all authorized forms, refer to the
current issue of DA PAM 310-2. TM 38-750
contains instructions on the use of forms for
records and reports. Authorized forms for units
maintaining this materiel are listed in Appendix
A.
Section II — DESCRIPTION
1-6. Differences Between Engine Models
a.
Engineering improvements were developed
on the AVDS-1790 series engines to improve
engine performance and reliability.
b.
The following engine models are available
in the field :
( 1 ) AVDS-1790-2-M. This original AVDS-
1790 series engine developed for the M60
vehicle had engine oil pan, Part No. 10865039.
In order to use the engine in other vehicles, the
oil pan had to be redesigned. Because engine
interchangeability was affected it was necessary
to change the engine model when the new oil pan
was installed on the engine. AVDS-1790-2-M
engines with the new oil pan are identified as
AVDS-1790-2-AM models.
(2) AVDS-1790-2-AM. This was an
original AVDS-1790 series engine with a new
engine oil pan,
Part No. 10912261, which
permitted the engine to be used as a replacement
engine
in
certain gasoline engine powered
vehicles. The oil pan change was the only dif-
ference between this engine model and the
AVDS-1790-2-M model.
(3) AVDS-1790-2A. The AVDS-1790
series engines,
having the new oil pan and
numerous other changes to improve engine
performance and reliability, is identified as the
AVDS-1790-2A model. Basically all models of
the engine are similar except for the oil pan, and
other improvements which are as follows:
(a) Secondary fuel / water separator filter
unit (fig. 1-6) replaced the conventional dual
replaceable element type filter (fig. 1-3) in late
production. All engines produced with secondary
fuel filter shall be updated to water separator
filter unit at time of engine overhaul.
(b) Relocated oil temperature and
pressure transmitters and switches to the front of
the engine for ease of maintenance.
(c) Optional splined or diaphragm type
fuel injection pump drive coupling.
(d) Flexible fuel injector nozzle fuel
return lines replaced rigid steel tubes to improve
service life.
1-2
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