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