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F-70

F-70

TROUBLESHOOTING AND REPAIR

STATOR RESISTANCE TEST (continued)

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TEST PROCEDURE

1.With the engine off, disconnect the negative bat- tery cable. Make sure that there is nothing plugged into the 115V and 230V receptacles.

2.Using the 5/16” nut driver, open up the control panel and tilt out. Remove the control board cover.

3.Refer to the “Case Cover Removal” section and remove left side engine and stator cover panels, and the front shroud.

4.Pull the sleeving back, and disconnect all weld leads (W1-W6) from the SCR/Diode weld bridge using the 7/16” nut driver and crescent wrench.

5.Locate the point at which the capacitor bank leads are bolted to the T1,T2 & T3 leads coming from the stator and L10953-1 exciter module. Pull the sleeving back and disconnect the three bolted exciter connections using a 7/16” nut dri- ver and crescent wrench.

6.Disconnect J2 from the control board.

7.Using an Ohmmeter check for continuity between each weld lead (W1-W6) to the T1 exciter lead. There should be no continuity between these leads.

8.Check for continuity from the weld leads to the J2 plug pins 1 & 2 at the control board. There should be no continuity between these leads.

See Figure F.31.

9.Check for continuity from the weld leads to frame ground. There should be no continuity between these leads.

10.Check for continuity from J2 pins 1 & 4 to the T1 exciter lead. There should be no continuity between these leads.

11.Check for continuity from J2 pins 1 & 4 to frame ground. There should be no continuity between these leads.

12.Construct the circuit shown below. See Figure F.32.

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Figure F.32

V1

 

J50

 

 

S1

1 OHM

 

 

 

300 W

 

 

12V

VOLTAGE LEADS MUST

 

STATOR

 

WINDING

CAR

V2

BE TO THE WINDING

UNDER

BATTERY

SIDE OF THIS CONNECTION

 

 

 

TEST

 

 

 

J51

COMMANDER 400

Page 124
Image 124
Lincoln Electric SVM133-B service manual Stator Resistance Test

SVM133-B specifications

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