jd 350 dozer

[walter shea]

Just finished with repair on hyd pump shaft by putting new coupling on , moveing it up and welding coupling as suggjested by Roy S. blade is working now but theres a noise( hard to discribe the sound) that wasn t there before, mostly when lifting blade all the way up not hereing it when just idleing or tilting blade any ideas ?

 

[Roy Suomi]

Rattling noise or a buzzing noise???? Is the coupling welded so it's putting pressure on the pump internal parts [ preloaded??]...If so you might need to grind off the end of the coupling some so it doesn't pressure the pump shaft..Does the pump drive have a disconnect?? A lever on the engine oil filter side under the radiator?? Sometimes the pump disconnect isn't fully engaged or disengaged and might make a sizzling or light grinding noise...Usually they won't even move from corrosion of the lever shaft...