Troubleshooting & repair, Stator/rotor removal and replacement (continued) – Lincoln Electric POWER-ARC 4000 SVM103-A User Manual
Page 74
POWER-ARC 4000
TROUBLESHOOTING & REPAIR
F-33
STATOR/ROTOR REMOVAL AND REPLACEMENT (continued)
FIGURE F.12 - CHECKING ROTOR-STATOR AIR GAP
ROTOR
STATOR
FEELER GAUGE
6. Install the bottom two end bracket thru-
bolts.
Note: The flat washer goes on the top right
hand thru-bolt for the green ground wire.
7. Tap the end bracket with the mallet as
necessary to position it. Tighten the bolts
to 22 - 25 ft lbs. Alternate tightening in
order to pull the assembly together even-
ly. As you tighten, look through the brush
housing access door and watch the bear-
ing to judge end bracket movement and
alignment.
8. Check the rotor-stator air gap with the
long .010 feeler gauge. The measurement
is taken through the brush holder access
door; see Figure F12. Turn the engine
with the recoil starter rope slightly so that
the rotor “iron” is up to take the measure-
ment. (The rotor has two flat sides, which
are not measured for air gap.) Slide in the
gauge. Then rotate the shaft 180 degrees
and measure again. If the gauge does not
clear, loosen the four end bracket thru-
bolts, reposition the end bracket, retight-
en the bolts, and recheck the air gap.
Repeat until the proper .010 minimum air
gap is achieved.
9. Tighten the end bracket support nuts and
lock washers. Remove the 2 X 4 engine
support.
10. Reinstall the brush holder assembly.
Refer to the topic “BRUSH REMOVAL
AND REPLACEMENT” in this section of
the manual.
11. Slide the control box back into place. Pull
the stator and ground wire up through.
12. Remove the control panel (2 screws) and
reconnect the output terminal leads (W1,
W2). Install a new cable tie to hold the
leads together. Reconnect the stator
wire/harness molex coupling. Install the 6
screws that hold the control panel to the
box.
13. Connect the engine flywheel alternator
coupling.
14. Lift the control box and screw in the rub-
ber mountings. Set the control box onto
the mountings.
15. Install the front left hand washer and nut
that anchors the control box to the stator
frame. Position the reactor and install the
remaining washers and nuts.
16. Check all terminal connections for clear-
ance, grounding, and tightness.
17. Replace the top cover to the control box
and tighten the 4 nuts.
18. Conduct the “RETEST AFTER REPAIR”
procedure, the following topic in this sec-
tion of the manual.