Engine Rebuild Guide, Break-In and Tune-Up CTM100 (06APR04) 02-010-21 P OWER T ECH 10.5 L & 12.5 L Diesel Engines 040604 PN=69 Check Electrical System CAUTION: Battery gas can explode. Keep sparks and flames away from batteries. Use a flashlight to check battery electrolyte level. –UN–23AUG88 Never check battery charge by placing a metal object across the posts. Use a voltmeter or hydrometer. TS204 Always remove grounded (-) battery clamp first and replace it last. Prevent Battery Explosions 1. Clean batteries and cables with damp cloth. If corrosion is present, remove it and wash terminals with a solution of ammonia or baking soda in water. Then flush area with clean water. 2.
Coat battery terminals and connectors with petroleum jelly mixed with baking soda to retard corrosion. 3. Test batteries. If batteries are not near full charge, try to find out why. 4. On low-maintenance batteries, check level of electrolyte in each cell of each battery. Level should be to bottom of filler neck. If water is needed, use clean, mineral-free water. If water must be added to batteries more often than every 250 hours, alternator may be overcharging. NOTE: Water cannot be added to maintenance-free batteries. 5. If batteries appear to be either undercharged or overcharged, check alternator and charging circuit. 6. Check tension of drive belts. See operator’s manual. 7.
Check operation of starter motor and gauges. NOTE: For test and repair of alternators and starter motors, see CTM77, Alternators and Starter Motors. RG,RG34710,1059 –19–23OCT97–1/1 02 010 21