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

Home > Ordnance Documents and other related manuals > > Lesson 1, Practical Exercise - Answers
Practical Exercise 1 - Continued - OD16170059
Lesson 1, Practical Exercise - Answers - Continued

Troubleshoot Electrical System ( Glow Plugs And cold Start Advance on An
Page Navigation
  49    50    51    52    53  54  55    56    57  

TROUBLESHOOTING THE M998 ELECT SYST. - OD1617 - LESSON 1/PE 1
LESSON 1.
PRACTICAL EXERCISE - ANSWERS
Requirement
a.
The  electrical
system
on
the
HMMWV
is
made
up
of
fifteen
components.
b.
The six rules of troubleshooting are:
(1) Rule 1.  Question the operator to obtain any information that
might help in determining the cause of the malfunction.
(2) Rule 2.  Never overlook the chance that the problem could be
of  simple  origin.
The  problem  could  be  corrected  with  minor
adjustment.
(3) Rule 3.
Use all senses to observe and locate the trouble.
(4) Rule 4.  Use test instruments and gages to help you determine
and isolate the problem.
(5) Rule  5.
Always  isolate  the  system  where
the
malfunction
occurs and then locate the deffective component.
(6) Rule 6.  Use standard automotive theories and principles when
troubleshooting the systems covered.
c.
The specific gravity of the electrolyte should be below 1.250.
d.
Prior to disconnecting any connector from the protective control
box, the negative battery cable must first be disconnected.
When  the  engine  is  below  120  F  and  the
e.
rotary  switch  is
positioned to RUN, the WAIT-TO-START lamp lights,
then goes off (on
for up to fifteen seconds, depending on engine
temperature), the
engine then can be started, the glow plugs will
continue to cycle
(for up to 5 minutes), then stop cycling.
f.
When measuring glow plug resistance, the resistance should be
between 1.5 to 2.6 Ohms.
The engine temperature should be above 85 F.
g.
54






Western Governors University

< Previous Page
Index ^
Next Page >

Privacy Statement
Press Release
Contact

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