eep UNIVERSAL SERIES SERVICE MANUAL H E A B The only test requlred of the ignition ballast re A sistor is a continuity check Characteristics of the bailast produce wide variations in resistance with L W Bn changes in ballast temperature Therefore check ic i i i l Q 1 ii i ing voltage drop across the ballast would be mis r Z il L L leading lrilr l L ia if r e i r r lg Y CElLIltll0I lI Never make a connection that connects r e the baillalst across the battery as this will burn the F L r ballast resistor winding lr ll r gr H 1 S ark F lu s l E lr l l lp 9 ff f l Clean and gap spark plugs as described in Par C 4 V i V Inspect them for excessive burning and erosion of I ele c trodes blistering of porcelain at the firing tip A i blaclk deposits or fouling These conditions indicate 12746 that the plugs have not been operating at the cor Flo H is vAcUuM llDvANci2 jEfE iflfratllre MECHANISM lDl1 LCOl lNcl f e Prolonged idling just before removing and gjjjgglxgjvgigijs checki ng the plugs should be avoided as it may l eVacuum Pull Rod I U l LlC false lIrl dlC3tl i l 1S Spark plug operating temperatures may have been TO aellhsl hreaker Pelhl earll dwsll ahrl Sel llm too hot too cold or normal as described mg Ol enema ral er te Pars CAO ml Cell aa At too hot a temperature the tip of the insulator will show dark spots and blisters after fairly short H 3l CON r V 6 Engine service As high temperature operation is con The sealed coil does not require any special service tinued the whole insulator nose will discolor show other than keeping the terminals and wire connec ing fused and blistered deposits near the electrode tions clean and tight as well as considerable erosion and burning of the The positive l terminal of the coil is connected electrodees After extreme service the porcelain it to the ignition switch through the ballast resistor self may be fused cracked and blistered at the tip and is also connected directly to the starter sole The electrodes will show extreme erosion and burn noid to by pass the resistance during cranking of ing and possibly even surhace cracking rliniggarlvc terminal ir connected to the N f Mh ra k j g a fS ft i plugs distributor The secondary high tension terminal ftl l frllrjly Shen S rVl f a ll may be caused by Water is connected by a short cable to the center terminal lE lEEZ El llrl E gEl lEE li3Q m in the distributor Cap lb At too cold a temperature plug operation in Always make certain the coil wires are connected the early stages will result in a dull black sooting TO the pygpgy Cgi teymiiiaiig to eiqgurg Correct of the plug This condition frequently is found in Cgi pO 3yity new vehicles during the break in period and is no T i ndi ation of trouble in this case As the condition Note The lghltleh Cell ahel lhallaslr reslslhr hlhsr pr g r esses black deposits of oil and carbon build ba of the Same hlahhraelllrer Ballast reslsrers up on the base of the shell and on the insulator ahel lghltlhh Pells Or Ohe rrlahllraelhrer are lhler until in extreme cases the space between insulator ehahgeable Wlth bath hhlts hr llle Ol her and shell may be almost completely Hlled Excessive i electrode erosion will seldom be founld in cases of cold plug operation These indications can be pro H 32 Ballast Reslstor duced by the use of an excessively rich air fuel V 6 Ehglhe mixture and the carburetor should be checked if An ignition ballast resistor is in series with the this condition is suspected Fouling will also be primary winding of the coil The ballast resistor caused by leaking rings or intake valve guides that helps regulate the flow of primary current through permit excessive oil to reach the combustion out the speed range At low speeds whe n the con chambers The use of a hotter plug will help burn tacts remain closed longer the ballast heats and away some of this fouling but the mechanical con increases in resistance thereby limiting the flow of dition of the engine should be corrected Prlmary iurr r Ar higher l rl Wh rr th Orl In normal temperature operation the plug will talits r Yn 1i l0S d Or h0rr r l rlO lS of time rh accugmulate grayish tan to reddish brown deposits ballast cools and thereby le aSes in r S iSta c with fairly uniform discoloration of the insulator to allow more primary current and reduce the fall nose and slight localized electrode erosion If the off in availablii voltage During Staffing lZh resistor insulator shows any blotcbes blisters irregular dis compensates for the lowered battery voltage re coloration etc look for hot plug symptoms I oo sulting from the starter load and permits an in hot or too cold plug operation may be caused by crease in primary current resulting in a higher the use of plugs of other than the specified heat secondary voltage for starting rating but if the plugs are as specified a hotter or 187