Lincoln Electric SVM175-A 36TROUBLESHOOTING & REPAIRF-36, Engine Alternator Test, Test Procedure

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F-36TROUBLESHOOTING & REPAIRF-36

ENGINE ALTERNATOR TEST (continued)

FIGURE F.8 – LEAD LOCAIONS

BATTERY

209 IGNITION

TEST PROCEDURE		210	OIL PRESSURE SWITCH
		8.	Make sure the idle switch is still in the “high”
1.	Turn the engine off.		position, start the engine, and allow it to run
		9.	at high idle speed for about 15 to 30 seconds.
2.	Open the engine access door and check the		Place the negative meter probe on a good
	voltage at the battery terminals. It should be		chassis ground, or the negative battery termi-
3.	approximately 12 volts DC.		nal. Place the positive meter probe on the
	Attach the meter leads to the battery termi-		battery terminal on the back of the alternator.
	nals, being careful to position them so they		(Lead #209) See Figure F.8. See Wiring
	stay clear of moving parts while the engine is	10.	Diagram.
4.	running.		The meter should read about 13.7 to 14.2
	Place the idle switch in the “HIGH IDLE” posi-	11.	VDC.
	tion, start the engine, and allow it to run at		Move the positive probe to the IGN terminal
5.	high idle speed for about 15 to 30 seconds.		on the back of the alternator. (Lead @210C)
	The meter should read about 13.7 to 14.2	12.	See Figure F8.
6.	VDC.		The meter should read about 13.7 to 14.2
	If the meter reads correctly the engine alter-	13.	VDC.
	nator is producing adequate power to charge		If the meter reads correctly, check the con-
6.	the battery and this test is complete.		nections between the alternator and the bat-
	If the voltage is significantly higher than the		tery. See wiring diagram.
	above values, the alternator is not properly	14.	If the voltage at both of the above test points
	regulating the battery charging voltage and
	should be replaced. If the voltage reads the		reads the same or less than the battery volt-
	same or less than the measurement taken		age measurement taken when the engine
	when the engine was not running, proceed		was not running, the alternator is defective.
	with the following tests.	15.	Repair or replace it.
7.	Turn off the engine, disconnect the meter		If battery voltage is present at the battery ter-
			minal of the alternator, but not at the “IGN”
	from the battery, and open the engine access		terminal; check the run/stop switch and the
	door on the left side of the machine.		wiring connecting the “IGN” terminal to the
			switch. See Figure F8.
	RANGER 305D