• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print

Home > Ordnance Documents and other related manuals > > Test Equipment - OD161680049
Trailer Receptacle - OD161680048
Batteries and Charging System. - OD161680050

Troubleshoot The High Mobility Multi- Purpose Wheeled Vehicle (HMMWV)
Page Navigation
  39    40    41    42    43  44  45    46    47    48    49  

TROUBLESHOOTING THE HMMWV - OD1616 - LESSON 1/TASK 2
(15) Glow Plugs.  Diesel engines of the prechamber design, like the
HMMWV, require a preheating glow plug extending into the prechamber
to aid in starting when cold.
These are located in the cylinder
head,  below  each  injector  nozzle.
When  the  RUN/START  switch  is
placed in the RUN position, the glow plugs are energized and air in
the prechamber is heated to approximately 1400 F.
In 0 F weather
the glow plugs will preheat the prechamber in six seconds; the engine
will then start more easily.
Glow Plug Controller.  The glow plugs in the HMMWV are controlled by
a fast-start control system.  The controller, located in the coolant
outlet manifold, is a thermal model of the glow plugs and turns the
glow plugs on and off by monitoring engine coolant temperature.
3.
Test Equipment
Multimeter.
At the unit level, there is only one piece of test
equipment  used  to  troubleshoot  the  electrical  system;  that  test
equipment is the multimeter.  In the paragraphs that follow, we will
discuss the TS352 B/U multimeter (figure 1 on page 46).
The TS352
B/U is the most commonly found multimeter in the automotive unit
maintenance number 1 and 2 common tool sets.
It is of military
design and is an important and useful piece of test equipment.
It
can be used to perform voltage, resistance, and continuity checks on
the electrical system of the HMMWV.
For the sake of this subcourse, it is assumed that the student is
familiar with the care and usage of the multimeter.  Therefore, this
information  will  not  be  repeated  here.
However,  additional
information concerning the multimeter can be obtained in TM 11-6625-
365-15.
4.
Electrical System Troubleshooting
a.
Electrical  System  Troubleshooting  Procedures.
The  following
paragraphs provide the information necessary to diagnose and correct
malfunctions of the electrical system.
Because of its complexity,
the  electrical  system  is  divided  into  the  following  functional
systems:
43






Western Governors University

< Previous Page
Index ^
Next Page >

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.