TM-5-2330-378-14-P
SEMITRAILER, LOWBED: 40 TON CONSTRUCTION EQUIPMENT TRANSPORTER M870 AND M870A1
TECHNICAL MANUAL; OPERATOR'S, UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)
JUNE 1999
TM-5-2330-378-14-P - Page 485 of 524
TM 5-2330-378-14&P
APPENDIXH
TORQUE VALUES FOR THREADED FASTENERS
Paragraph
Page
Number
Paragraph Title
Number
H-1
General
.....................................................................................................................................
H-1
H-2
Torque
Limits .
...........................................................................................................................
H-1
H-3
How To Use Torque Table
.......................................................................................................
H-1
H-4
Tightening
Metal Fasteners
......................................................................................................
H-3
H-5
Fastener
Size and Thread Pattern
...........................................................................................
H-4
H-6
Fastener
Grade
........................................................................................................................
H-5
H-1.
GENERAL.
This appendix
provides general torque limits for screws used on the M870 and M870Al
semitrailers.
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 correct 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.
H-2. TORQUE LIMITS.
Table H-1 (p. H-2) listsdrytorque
limits, which are used on screwsthatdo
not have lubricants applied tothreads.
Table
H-2 (p. H-3) lists wet torque limits, which are used on screws that have high-pressure
lubricants applied to threads.
H-3.
HOW TO USE TORQUE TABLE.
1
Measure the diameter of the screw to be
installed.
2.
Count the number of threads per inch or
use a pitch gage.
3.
Under the heading SIZE in Table H-1, look
down the left-hand
column
until the
diameter of screw to be installed is found
(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 counted in step 2.
H-1
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