gassing freely and the gravity ceases to rise for three successive readings taken at hourly intervals. Do not stop charging short of the fully charged state, even if it requires charging for 24 hours or more. A battery which is badly sulphated may not take a charge or will require more charging time than a normal battery.
charge the battery and repeat the test. Likewise if all cell readings are less than 1.95 volts, charge the battery and repeat the test.
6. If cell readings are 1.95 volts or more and vary more than 0.5 volt, replace the battery. 7. A battery that is in good condition should be charged until a hydrometer reading of 1.2301.275 is obtained.
3. A fast charger has the ability to quickly "boost" a battery without removing it from the tractor. However, a high rate charger may be used, to quickly "boost" a hattery. A hid.h rate charge must always be followed by slow chargind. for a length of time necessary to bring the battery to fun charge. Follow the instructions provided by the manufacturer of the fast charger being used.
8. Connect the secondary wire to the coil if it was previously disconnected.
E. Charging the Battery 1. Wash all dirt from the battery and clean its terminals before placing it on charge. Do not allow dirt to enter the cells. Bring the liquid level in the cells up to the fill ring. Allow the battery to warm up before adding water as the level will rise as it warms.
NOTE: ' Charging batteries at u high rate causes the temperature 01 tlte electrolyte to ri.se ami may cultfJe violent gassing 01 the electrolyte, unless the equipment is provided with an automatic time limiting or temperature limiting device to protect the battery electrolyte Irom exceeding a temperature of 125 0 F. and gassing excessively.
2. Slow charging is the only method which will iuIIy charge a battery. Slow charging should be at a rate of 3 to 4 amperes for a sufficient length of time to funy charge the battery. The battery is fully charged when the cells are all
GENERATOR AND CHARGING CIRCUIT The charging circuit consists of the battery, generator, generator regulator, charge indicator light and the necessary wiring. A shunt wound two pole type generator provides the electrical energy necessary to keep the battery fully charged. Generator output is controlled by a two unit regulator consisting of the cutout relay and a voltage current regulator. Before attempting any repairs in the charging circuit, make certain that the fan belt is properly adjusted and that terminal connections are tight, then perform the following tests to determine which unit is at fault:
3. Connect the other ammeter lead to the terminal of the armature wire as shown in Figure 3. 4. Start the engine and gradually increase the engine speed to 1500 rpm while observing the ammeter. The generator output should reach or exceed 20 amperes.
GENERATOR A. Generator Output Test 1. Disconnect the armature (red) wire from the terminal on the generator. Connect a jumper wire across the armature and field terminals as shown in Figure 3. 2. Connect the negative lead of an 0 -75 ammeter to the generator armature terminal (six-volt system only).
NOTE: On twelve volt systems, connect the ammeter positive lead to the generator armatitre terminal.
Figure 3- Generator OUfput Test Connections
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