SECTION I. INTRODUCTION
OSV has A3 engine and TX200-4/4A transmission.
If testing OSV, refer to TM 9-2350-366 series.
This chapter tells you
how to install
the complete powerplant
or the engine
the powerplant test stand. Task will instruct you on how to connect the engine and how to start it. You
should clean, inspect, check for leaks, and obey warnings from this TB and from the applicable Technical
Manuals (TM 9-2350-277-20 Series for the M113A3 FOV, TM 9-2350-261-20 Series for the M113A2 FOV,
TM 9-2350-247-20 Series for the M548A1 & M548A3, TM 9-2815-205-34 for all 6V53 engines, TM 9-2520-
254-34 for TX 100-1 transmissions, and TM 9-2520-272-34&P for X200-4 & 4A transmissions). Be sure to
read all warnings, cautions, and notes in this TB. They help you avoid harm to yourself, other personnel, and
equipment. They also tell you things you should know about the task.
Severe equipment damage will always result and personal injury
can occur if the wrong voltage regulator is used.
Always disconnect the batteries' ground cable(s) before removing
or connecting cables to the regulator to avoid personal injury or
equipment damage from the high amperage supplied by the
used in the M113A2 FOV. Late models M577A2s and M1068s have
connections to the 200-amp regulator if the engine is equipped
The 200-amp voltage regulator, NSN: 2920-01-174-1574 is used in
all M113A3/M548A3 FOVs. Do not make connections to the 100-
amp regulator if the engine is equipped with a 200-amp
Pin C of the regulator connector is the positive battery lead on
the 200-amp regulator and pin C on the 100-amp regulator is the
negative battery lead. Ensure that you have the right regulator
for the application. If the regulator is not identified, do not use it.
Using the wrong regulator will damage the alternator, engine
wiring harness, the powerplant test stand's wiring harness, and
powerplant test stand's regulator.