PAR 63-65
CHAPTER 4
TROUBLESHOOTING
Section I. GENERAL
6 3 . P U R P O SE
N o t e: Information in this chapter
i s f o r u s e b y O r d n a n c e m a i n t e-
n a n c e p e r s o n n e l , i n c o n j u n c t i o n
with and as a supplement to the
troubleshooting section in the ap-
plicable TM-20 manual. It provides
continuation of instructions where
a remedy in the Unit level mainte-
nance manual refers to Ordnance
m a i n t e n a n c e p e r s o n n e l f o r c o r-
rective action.
Operation of a deadlined vehicle without
a preliminary examination can cause fur-
ther damage to a disabled component and
possible injury to personnel. By careful
inspection and troubleshooting, such dam-
age and injury can be avoided. In addition,
the causes of faulty operation of a vehicle
o r c o m p o n e n t c a n o f t e n b e d e t e r m i n ed
without extensive disassembly.
64. GENERAL INSTRUCTIONS AND
P R O C E D U R E S
Note:
This
chapter
contains
inspection
a nd
troubleshooting
procedures to be performed while
a d i s a b l e d c o m p o n e n t i s s t i ll
mounted in the vehicle as well as
after it has been removed.
a . T h e i n s p e c t i o n s m a d e w h i l e t he
component is mounted in the vehicle are,
for the most part, visual and are to be
performed before attempting to operate
the vehicle. The object of these inspec-
t i o n s i s t o d e t e r m i n e t h e c o n d i t i o n of
these components and, if found defective,
to take precautions to prevent any further
damage.
b . T h e t r o u b l e s h o o t i n g p e r f o r m e d
while the component is mounted in the
vehicle is that which is beyond the scope
o f t h e u s i n g o r g a n i z a t i o n.
C h e c k t he
troubleshooting section of the applicable
TM-20 manual, then proceed as outlined
in this chapter.
c . If the component alone is received
by the Ordnance establishment, inspection
is performed to verify the diagnosis made
when the component was in the vehicle, to
uncover further defects, or to determine
malfunctions. This inspection is particu-
l a r l y i m p o r t a n t b e c a u s e i t i s o f t e n t he
only means of determining the malfunction
w i t h o u t c o m p l e t e l y d i s a s s e m b l i n g t h e
component.
Section II. TROUBLESHOOTING PROCEDURES
65. OPERATING CHARACTERISTICS
a . C o n s t r u c t i o n F e a t u r e s . R e f e r to
p a r s . 8 t h r o u g h 2 7 f o r d e s c r i p t i o n a n d
T o p e r f o r m e f f e c t i v e t r o u b l e s h o o t-
operation of transmission components.
ing, the mechanic must have a thorough
k n o w l e d g e o f t h e c o n s t r u c t i o n f e a t u r es
b . F u n c t i o n s o f C o m p o n e n t s . R e f er
a n d o p e r a t i n g c h a r a c t e r i s t i c s
of
the
to pars. 28 through 58 for explanations of
power train. Particular attention should
p o w e r t r a i n h y d r a u l i c o p e r a t i o n s a nd
b e a c c o r d e d t o t h e s u b j e c t s o u t l i n e d
power flow through the power train com-
b e l o w .
ponents.
Change 2 69
|
|