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240 Harvester Feller/
Buncher
ELECTRICAL SYSTEM MAINTENANCE CONTINUED...
CHECKING ALTERNATOR OUTPUTCHECKING ALTERNATOR OUTPUT
CHECKING ALTERNATOR OUTPUTCHECKING ALTERNATOR OUTPUT
CHECKING ALTERNATOR OUTPUT
1. Disconnect negative battery cable.
2. Remove wire from "BAT" connector on alternator and fasten it to one connector of an ammeter. Fasten other
connector of ammeter to "BAT" connector of alternator.
3. Connect battery cable again.
4. Remove hot wire from electric solenoid on fuel injection pump and turn engine with starter for approximately
30 seconds to cause a partial discharge of battery.
5. Install hot wire on electrical solenoid and start engine and run at full engine RPM.
6. The ammeter reading must be within 10 percent of rated amperage marked on alternator case.
7. If reading is correct, alternator is good. If reading is more or less than 10 percent of rated amperage, check
regulator.
CHECKING THE REGULATORCHECKING THE REGULATOR
CHECKING THE REGULATORCHECKING THE REGULATOR
CHECKING THE REGULATOR
1. Use steps 1 through 5 of "Checking Alternator
Output".
2. Put a small screwdriver in test hole. See Figure 3.
3. If the ammeter reading is not within 10 percent of
rated amperage (marked on alternator case),
regulator may be damaged. Check diode trio,
rectifier, stator, or rotor.
Damage to alternator can occur if:
- battery connections are not connected properly.
- wires from alternator are grounded.
- engine is operated with battery cables disconnected.
- cables are connected when using a fast charger or when welding on the loader.
(Remove both cables from the battery.)
- extra battery cables (booster cables) are connected wrong.
Battery does not hold it's charge. 1, 2, 3, 4, 5
Alternator will not charge. 1, 2, 5
Starter will not turn the engine. 2, 3, 4, 6, 7, 8
PROBLEMPROBLEM
PROBLEMPROBLEM
PROBLEM
CAUSECAUSE
CAUSECAUSE
CAUSE
KEY TO CORRECT THE CAUSEKEY TO CORRECT THE CAUSE
KEY TO CORRECT THE CAUSEKEY TO CORRECT THE CAUSE
KEY TO CORRECT THE CAUSE
1. Alternator belt is loose or damaged.
2. Battery connections are dirty of loose.
3. Battery is damaged.
4. The ground connection is not making a good contact.
5. The alternator is damaged.
6. The engine is locked.
7. The starter has damage.
8. The wiring or the solenoid is damaged.
TROUBLE SHOOTING THE ELECTRICAL SYSTEMTROUBLE SHOOTING THE ELECTRICAL SYSTEM
TROUBLE SHOOTING THE ELECTRICAL SYSTEMTROUBLE SHOOTING THE ELECTRICAL SYSTEM
TROUBLE SHOOTING THE ELECTRICAL SYSTEM
The following trouble shooting chart is provided as an assistance in locating and correcting problems which are most
common.
AlternatorAlternator
AlternatorAlternator
Alternator
No. 2No. 2
No. 2No. 2
No. 2
terminalterminal
terminalterminal
terminal
No. 1No. 1
No. 1No. 1
No. 1
terminalterminal
terminalterminal
terminal
"BAT""BAT"
"BAT""BAT"
"BAT"
terminalterminal
terminalterminal
terminal
TestTest
TestTest
Test
HoleHole
HoleHole
Hole
Figure 3Figure 3
Figure 3Figure 3
Figure 3
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