Lincoln Electric SVM135-B service manual #551 #550, Black, #551 +, White

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F-52	TROUBLESHOOTING AND REPAIR		F-52
	DRIVE MOTOR TEST (continued)
	FIGURE F.12 — DRIVE MOTOR TEST.
	#551	#550
	4	1
	J3
	6	3
	#550 (-)
	BLACK
	#551 (+)
	WHITE

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PROCEDURE

1.Remove input power to wire feed unit.

2.Using the 3/8 in. nutdriver, remove the cover from the wire feeder.

3.Locate the two quick connectors in the two motor armature leads. Refer to Figure F.12. Do NOT disconnect the leads.

4.Apply the correct input power (from the Power Wave 455 control cable) to the wire feeder. Activate the gun trigger and with the motor running check at the quick connectors [#551 White (+) to #550 Black (-)] for approximately 1 VDC to 32 VDC dependent upon motor speed. The motor speed should vary with changes in motor armature voltage.

5.If the correct voltages are NOT present at the motor leads, check the associat- ed leads between the motor and plug J3 on the control board. If the leads are OK, the control board may be faulty.

6.If the correct voltages are present at the motor armature leads and the motor does not run and vary speed with changes in armature voltage, the motor or gear box may be faulty. See Gear

Box and Drive Motor Removal and Replacement.

7.Install the wire feeder cover using the 3/8 in. nutdriver.

POWER WAVE 455/POWER FEED 10