Lincoln Electric Welder Ranger 330MPX

- Shut off power to the machine

- Using a T-30 Torx bit, remove the 8 screws securing the casevback and remove the case back

- Using a 5/8” socket and impact wrench, remove the rotor through bolt and then remove the rear alternator fan. Note there isvLoctite on the rotor through bolt - Remove leads 200 and 219 from the brush holder

- Using a 10mm wrench, remove the two screws securing the brush holder assembly. Lift the brush holder assembly up and then out

- Examine the brushes for chips, cracks or excess or uneven wear. The brush should be at least 1⁄4” long. Verify the brush springs are operating and are not stuck. Replace the brush assembly as needed. Inspect the rotor slip rings for grooves or excess wear

- Reassemble the brush holder assemble and tighten the bolts to 41 in-lbs

- Connect leads 200 and 219 to the brush holder;

- Loosen the cover retaining knob and remove the cover

- Remove the pre-cleaner from the paper element

- Wash the pre-cleaner in warm water with detergent. Rinse the pre-cleaner thoroughly until all traces of detergent are removed. Squeeze out excess water (do not wring). Allow the pre-cleaner to dry

- Reinstall the pre-cleaner over the paper element

- Reinstall the air cleaner cover. Secure the cover with the cover retaining knob

- Loosen the cover retaining knob and remove the cover

- Remove the pre-cleaner from the paper element

- Clean any dirt from around the spark plug base

- Use a plug wrench to remove the spark plug

- Visually inspect the spark plug. Discard them if the insulator is cracked or chipped. Clean the spark plug with a wire brush if it is to be reused

- Measure the plug gap with a feeler gauge. Correct as necessary by bending the side electrode

- Check that the spark plug washer is in good condition and thread the spark plug in by hand to prevent cross-threading

- After the spark plug is seated, tighten with a spark plug wrench to compress the washer

- If installing a new spark plug, tighten 1/2 turn after the spark plug seats to compress the washer

- If reinstalling a used spark plug, tighten 1/8 - 1⁄4 turn after the spark plug seats to compress the washer

- Check the fuel filter for water accumulation or sediment

- Replace the fuel filter if it is found with excessive water accumulation or sediment;