seen” JORDAN SERIES “7° DELCO SYSTEM AMMETER JORDAN SERIES M (1920). SERIAL NOS. 10,001 UP DELCO GENERATING, STARTING AND LIGHTING SYSTEM DELCO IGNITION Sea en Type SJW-B, 6 volt, 94 ampere-hour. The negative (—) terminal IGNITION. air = No. 2159. Distributor Model No. 5207, Breaker contacts separ- ate | inch. They are made of tungsten. When the condition of the contacts affects the ignition, remove and resurface with fine emery cloth or against the flat side of an emery wheel, finishing on a hard oil stone. Oiling:—Put 4 or 5 drops of light engine oil in each ignition unit oilers eve weeks. If the track of the rotor button in the distributor head is not eal pal: ished, apply a small amount of vaseline with a soft cloth. If the car is driven more than 500 miles in two weeks, these attentions must be given every 500 miles. Timing :—Breaker contacts begin to separate when the top dead center mark on the flywheel is 2% inches past the indicator, spark control ie and breaker assembly in the fully retarded position. eae hey Se firing order is 1-5-3-6-2-4. Fa wah 7 4 Ba plug gaps are .025 to .030 inch. sTRreR Me I No. 164, Starter 1s connected to the engine through a set of reduction gears and a Bendix drive. Starter cranks the engine at 125 R.P.M., taking 180 am- eres. Lock torque is 28 Ib. ft., current being 450-500 amperes at 2.75 volts. OILING.—Put 5 or 6 drops of light engine oil in each of the starter bearing oilers every month. Remove the grease plug in the reduction gear case and inject soft cup grease every six months. GENERATOR. Model No. 165. Rotation is counter-clockwise, looking at the commu- tator end. Generator current regulation is by the third brush system. Maximum charging rate is 11-15 amperes, reached at 1200 R.P.M. of the armature or 16-20 miles per hour. Amperes Generator Data R.P.M. 2000 Charging rate is : Yayied by the adjustment of the third brush setting. To move the third brush, loosen the three screws holding the bearing retainer plate on the commutator end and shift the plate. Move in a counter-clockwise direction to in- crease the charging rate, or in the opposite sa ig to decrease the charging rate. Tighten the adjusting screws ead reseat the brush after making the ad- justment. » we charging rate must not exceed 16 amperes. Oiling: —Put 4 or 5 drops of light engine oil in each of the generator bearing oilers every two weeks. If the car is driven more than 500 miles in two weeks, the oil- ing must be done every 500 miles. RELAY:—Relay is mounted on the generator frame. Relay closes at 550-600 R.P.M. of the armature or 7-8 miles per hour, and opens at 500-550 R.P.M. of the arma- ture or 5-6 miles per hour. Relay contacts separate .046 to .062 inch. Air ga between the relay armature and coil core is .020 to .035 inch, contacts abiad: I. pide relay connect a voltmeter between the positive (+) generator brush round Then #1 slowly speed up the generator and adjust the relay spring ten- a turning the thumb nut until the contacts close when the voltmeter indi- cates 7.5 volts. Clean relay contacts by drawing unglazed paper between them. If badly burned or pitted, resurface with well worn No. 00 sandpaper. Remove all rit. Adjust before again putting into service. LAMPS.—Head lamps are 6-8 volt, 18 cp. Dimmer lamps are 6-8 volt, 4 cp. Dash and tail lamns are 6-8 volt. 3 co. CIRCUIT BREAKER.—A vibrating circuit breaker takes the place of fuses. It requires a current of 25 amperes to start this device vibrating. While vibrating, the current is 3 te 5 amperes.