SERVICE MANUAL
INTRODUCTION
Introduction
TORQUE - TENSION VALUES FOR STANDARD FASTENERS
This chart provides tightening torque for general purpose
applications using original equipment standard hardware
as listed in the Parts Catalog for the application Involved.
DO NOT SUBSTITUTE. Original equipment standard
hardware is defined as IH Type 8, coarse thread bolts
and nuts and thru hardened flat washers (Rockwell "C"
38-45), all phosphate coated and assembled without
supplemental lubrication (as received condition).
The torques shown below also apply to the following:
1. Phosphate coated bolts used In tapped holes
In steel or gray Iron.
2. Phosphate coated bolts used with phosphate
coated prevailing torque nuts (nuts with distorted
threads or plastic Inserts).
3. Phosphate coated bolts used with copper
plated weld nuts.
Markings on bolt heads or nuts indicate material grade
ONLY and are NOT to be used to determine required
torque.
Nominal
Thread
Standard Torque 10%
Diameter
N•m
Ibf-ft
1/4
10
7
5/18
19
14
3/8
32
24
7/16
51
38
1/2
80
60
9/18
110
80
5/8
155
115
3/4
270
200
7/8
440
320
1
650
480
1-1/8
800
590
1-1/4
1100
830
1-3/8
1500
1100
1-1/2
1900
1400
1-3/4
3100
2300
2
4600
3400
SPECIAL TORQUES
Each application has some non-standard torques which are necessary for proper
component function. These are listed under "SPECIAL TORQUES" shown elsewhere in
this manual. Typical examples are hose clamps, non-rigid joints (gaskets), non-ferrous
fasteners or tapped holes, spanner nuts, fine thread fasteners, jam nuts, and cases
where loading or distortion are critical factors.
CGES-185-3
PRINTED IN UNITED STATES OF AMERICA
Page 11
SERVICE MANUAL
