I97 3 79 See Page 1 of this Section For TRUCK SERIEIS 100 500 SECTION 50 1 How to Find Frame Numbers YEAR Z M0oELxREsTR1cT1c PART NUMBER ZZ DESCRIPTION grr 5B KiQ CROSS MEMBQ fRAME TO RADIATOR SUPPORT AIsq jlg g yL8A339 73 l l F500 C7TZ 58000 B 1 50CQ 2 Refer to grouggg 8 swig REINFORCEMIEEQAME TO RAoiAToR SUPPOR5 IEpgJjsg so Ea 6 FRAME ASSY HOW T0 FIND FRAMIE NlUMBEQiitS 1 USE FRAME MODEL APPLICATION CHART Truck models are listed alphabetically beginning on page 3 Use the sicle rail type see illustrations on page 2 and Remarks to select a frame for the wheelbase desired Read all explanatory notes carefully as frame modification may be necessary 2 USE MEASUREMENTS AND PIERCED HOLE a Determine the Side Rail Type see illustration on page Zi b Locate side rail pierced hole to determine Steel Type c Measure dimensions A to H and refer to Iclentificatlon Ihari on page 3 to determine frame section modulus O d Refer to Model Application Chart beginning on page 3 to locate frame required Explanatory notes will advise if further modification is necessary 3 USE SECTION MODULUS a Frames can be identified by the section modulus and F E5 I which are shown in the Truck Data Book b Because of service substitutions the section moclulus of the service frame may be higher than that of the original frame c Section modulus is also shown in the Model Application Chart beginning on page 3 to aid in frame selection O Frame section modulus is the engineering l erm that indicates for comparative purposes the relative of two or more frames of the same supported length shape ancl material All other things being equal the frame with the largest section modulus will have the greatest strength and stiffness i e the ability to more effectively resist sagging under full loads lt takes into account frame depth flange width and material thickness P S I jg g pounds of yield strength r ggugig yy h Oc E ber 1986 i oE vRisnr ieee i FORD Mow TiTEut i Micri AN c0MRAr iv New Issue