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Howdy all, I'm going to look at a Bobcat 225 nt this Friday. The engine is not running. My larger concern is the welder/generator end. I'm thinking if I ohm out the rotor & stator and these tests come back good, I'll have a good project for resurection. I'll also make sure the slip rings are still firmly mounted to the rotor shaft. Could anyone tell me what these parts should return in an ohm's test? Or is there something else I can check to reasure this unit will weld and charge once I get the engine running? I don't want to bring it home if it's good money on a bad project.Thanks for any help! Hal
Reply:Hal,If I'm not mistaken you should see something in the realm of 3-4ohms across the rotor slip rings depending on the sensitivity of the meter. You don't want to see any continuity between either ring and the rotor shaft/laminations.As for the stator, you should see very low resistance between any pair of leads and, again, no continuity between any lead and ground with all leads disconnected (stator leads #50 & #52 connect to chassis ground #33).Your challenge is going to be getting the owner to let you 'poke around' inside the unit especially seeing as you'll have to disconnect a few leads to make your tests.MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110Save Second Base!
Reply:Duanne,Thanks for the help. Thats exactly the information I was looking for. I'll stick with the rotor ohm tests on site. I'll also be looking carefully at all the electronics I can find. Sometimes a bright flashlight and a mirror can show alot to the studios eye. Hal |
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发表于 2021-8-31 22:40:29