3 SERVICE IGNITION SYSTEM AND MAKE NECESSARY REPAIRS a Replace brittle or damaged spark plug wires Ij Install all wires to proper spark plug b Tighten all ignition system connections c Replace or repair any wires that are frayed loose or damaged d Remove distributor cap clean cap and inspect for cracks carbon tracks and burned or corroded terminals Replace cap where necessary e Clean rotor and inspect for damage or deterioration Replace rotor where necessary f Check the distributor centrifugal advance mechanism by turning the distributor rotor to see if the springs return it to its retarded posi tion If the rotor does not return readily the distributor must be disassembled and the cause of the trouble corrected g Check to see that the vacuum spark control operates freely by turning the movable breaker plate to see if the spring returns it to the re f tarded position Any stiffness in the operation of the vacuum spark control will affect the ignition timing Correct any interference or binding III condition noted h Examine distributor points and clean or replace if necessary I Contact points with an overall gray color and only slight roughness or pitting need not be replaced Dirty points should be cleaned with a clean point file Use only a few strokes of a clean fine cut contact file The file should not be used on other metals and should not be allowed to become greasy or dirty Never use emery cloth or sandpaper to clean contact points since particles will embed and cause arcing and rapid burning o f points Do not attempt to remove all roughness nor dress the point surfaces down smooth Merely remove scale or dirt Replace points that are burned or badly pitted Where burned or badly pitted points are encountered the ignition system and engine should be checked to determine the cause of trouble so it can be eliminated Unless the condition causing point burning or pitting is corrected new points will provide no better 1 service than the old points See Ignition System Section 9 for an analyses of point burning or pitting i Adjust distributor contact point gap to 019 new points or 016 used points using a feeler gauge or dial indicator fig 7 3 Breaker arm rubbing block should be on extreme top of cam lobe during adjustment NOTE Contact points should be cleaned before adjusting with a feeler gouge if they have been in service PRIMARY TERMINAL HOLD DOWN SCREW OUR ADJUST CAM ANGLE SETTING OR POINT OPENING HO 7 3 Pelnf AdlvshMnl Check alignment of distributor points with points closed fig 4 Align new points where necessary but do not attempt to align used points Instead replace used points where serious misalignment is observed LATERAL PROPER MISALIGNMENT LATERAL ALIGNMENT 1 a o v nl Iv n CORRECT LATERAL MISAL13N1AENT oY SENDING FIXED CONTACT SUPPORT slE YEE 3W 4RE 9lSEE I LYg R Fig 7 1 AliRew f d hi M