Lincoln Electric SAE-300 HE, Руководство по обслуживанию, Страница: 70 / 84

LINCOLN ELECTRIC SAE-300® HE Service Manual
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that these marks be precisely aligned during reassembly. See Figure F.27 .
NOTE: If these drill marks cannot be found, the positions of the rocker and exciter bracket should be
clearly marked so these parts can be precisely aligned when the machine is reassembled.
10. Loosen the rocker clamping screw, but do not remove it.
11. Using a hoist, or other appropriate means to support the weight of the exciter frame assembly,
12. Remove the four screws securing the exciter end bracket to the generator frame.
13. Carefully pry the exciter stator/end bracket assembly away from the generator frame.
NOTE:
The welding generator brush holder and rocker assembly will also be removed.
REPLACEMENT PROCEDURE
1. During reassembly, anti-seize compound should be applied to the screw threads.
2. Inspect the mating surfaces of the generator frame and the exciter bracket assembly. These
surfaces must mate together completely so it is very important that the surfaces are completely
clean and undamaged. The bearing and bearing housing should also be clean and undamaged.
Be sure that the rocker assembly is placed on the bearing housing with the locking screw positioned
on top.
3. Place some bearing grease in the bearing housing. Chevron SRI or equivalent is recommended.
4. Mount the exciter stator/end bracket assembly to the welding generator frame. Carefully line up
the drill spot between the two mating parts. Carefully and evenly tighten the four mounting bolts.
5. Check the armature air gap. At the smallest point, the gap should be wide enough to allow a .035”
thick Ч” wide feeler gage to fit between the armature and st ator through the entire length.
6. Position the rocker tightly against the hub, align the drill mark and tighten the rocker lock screw to
70 to 75 Inch-Lbs. DO NOT OVERTIGHTEN.
7. Be certain that the brush holders are properly positioned and parallel with the commutator. See
the commutator and brush service procedure.
8. Attach the heavy generator leads to the brush holders. Use the notes made during disassembly to
assure that the leads are connected and routed correctly. See Wiring Diagram.
9. If the original brushes are used, install them in the same positions that they had been. Form the
braided brush leads so they will not interfere with the travel of the brushes as they wear.
10. Reverse the removal procedure to finish reassembling the machine.
11. Replace all the tie wraps that had been removed during disassembly.
12. Replace and connect the battery. Connect the positive cables first, followed by the negative cables.
13. Connect the fuel line and fill the tank. The fuel system may require bleeding. See the engine
instruction manual for more information on the fuel system bleeding procedure.
14. Start the engine and seat the brushes using a commutator stone. See the Welding Generator Brush
And Commutator Inspection And Service Procedure .
15. Replace the brush and exciter sheet metal covers.
16. Replace the roof and doors.
17. Perform the Retest After Repair Procedure .