TM-9-2815-224-34-P
ENGINE, DIESEL:8-CYLINDER TURBOCHARGED, DETROIT DIESEL CORPORATION MODEL 8V92TA
DIRECT SUPPORT AND GENERAL SUPPORT MAINTENACE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST
JANUARY 1988
TM-9-2815-224-34-P - Page 531 of 554
TM9-2815-224-34&P
APPENDIX
E
TORQUE
LIMITS
IE-1.
GENERAL.
This section
provides
general
torque
limits for screws
used on the M977 series
vehicles.
Special
torque
limits are indicated
in the maintenance
procedures
for applicable
components.
The
general
torque
limits given
in this appendix
shall be used when
specific
torque
limits are not indicated
in
the maintenance
procedure.
These
general
torque
limits cannot
be applied
to screws
that retain
rubber
components.
The rubber
components
will be damaged
before
the torque
limit is reached.
If a special
torque
limit is not given
in the maintenance
instructions,
tighten
the screw
or nut until it touches
the metal
bracket
then tighten
it one more
turn.
IE-2.
TORQUE LIMITS.
Table E-1 lists dry torque
limits. Dry torque
limits are used on screws
that do
not have
lubricants
applied
to the threads.
Table E-2 lists wet torque
limits.
Wet torque
limits are used on
screws
that have
high pressure
lubricants
applied
to the threads.
IE-3.
HOW TO USETORQUE TABLE:I
(3)
Under the heading
SIZE, look down
the left hand
column
until you find the diameter
of the screw
you
are installing
(there
will usually
be two
lines
beginning
with the same size).
(4)
In the second
column
under
SIZE, find the number
of
threads
per inch that matches
the number
of threads
you counted
in step (2). (Not required
for metric
screws. )
CAPSCREW
HEAD
MARKINGS
(1)
(2)
Measure
the diameter
of the
screw
you are installing.
Count
inch.
TA357026
the number
of threads
per
Manufacturer’s marks
Metric screwsare of three
may vary. Theseare all
grades: 8.8,
10.9, and 12.9.
SAE Grade 5 (3-line).
Grades & Manufacturer’s marks
appear on the screw head.
(5)
To find the grade screw
you are installing,
match
the
markings
on the head to the correct
picture
of
CAPSCREW
HEAD MARKINGS
on the torque
table.
(6)
Look
down
the column
under
the picture
you found
in step (5) until you find the torque
limit (in lb-ft or
N•m for
the diameter
and threads
per inch of the
screw
you are installing.
E-1
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