Job Packet / WeldKing / MAG251

Packet use

Use this packet when the complaint involves rough arc, wrong feed direction after board work, breaker trip on trigger, post-trigger wire behavior, or spool-gun-only failure.
Primary guide: MAG251 guide
Bench sheet: MAG251 bench test
Brand references: WeldKing local reference manifest, WeldKing fault-branch matrix

Intake snapshot

Item	Record
Serial or shop tag
Exact complaint
Wire type and size as found
Base gun or spool gun in use
Breaker or input source used
Feed direction on first trigger
Arc quality on first short weld

Likely parts and accessories to stage

Item	Why stage it early
Known-good plain-steel MIG gun and consumables	removes gun-side false faults quickly
Known-good clamp and lead set	current-path trouble still mimics machine faults
Spool gun and matching drive roll only if complaint requires it	keeps aluminum-only faults separate
Meter and probes	needed for gas-valve and output-ripple proving

Official parts-entry shortcuts

Use these after the bench evidence proves the complaint follows an external gun, spool-gun, or drive-roll branch.
Broad parts path: official MAG251 parts category
SpoolKing24D spool gun 07NS1000: official product page
MAG251 drive-roll family including 072611011 and 07NS1005: official category page

First branch decisions

If you see...	Stay in this branch first
Rough arc with obvious ripple feel	capacitor condition branch
Feed direction wrong after repair	board-install or motor-direction branch
No gas on trigger	gas-valve or control branch
Spool gun fails but base gun works	spool-gun and drive-roll branch
Breaker trips on trigger	utility or current-path branch

Local files to open first

assets/reference_doc/WeldKing/MAG251/mag251manualweb.pdf
workbook sheet MAG251 in assets/reference_doc/all_models/troubleshoot_notes.xlsx

Bench workflow

Capture whether the complaint follows the base gun or spool gun before opening the machine.
Run MAG251 bench test.
Prove one chart-correct plain-steel base-gun process first.
Retest the original branch only after baseline gas, feed, and arc are healthy.

Release signoff

Check	Result
Base MIG baseline restored	pass / fail
Gas command restored	pass / fail
Feed direction correct	pass / fail
Spool-gun branch restored if required	pass / fail
No abnormal run-on, ripple, or breaker trip after power cycle	pass / fail
Covers, grounds, and lead routing restored	pass / fail

Technician: __________ Date: __________