Combines Rotor Gearbox

[Dan]

Very likely just the seal and my bet is you can handle repair. I believe it was '94 when torque sensors were held on with one very long threaded bolt instead of a pressed together assemble held onto gearbox shaft with a nut. If your machine is new enough to have bolt than remove belt and then bolt untill spring is relaxed. Sheaves will be last thing to pull from shaft. Wear sleeve for seal it threaded so you can insert bolt and easily remove wear sleeve with pliers which will give you plenty of room to pry out seal. Install new seal and oring for wear sleeve. Make sure shaft has very near zero endplay. Pay very close attention to torque sensor going together properly (cams not butting together,spines lined up) and get it good and tight and you'll be good to go. If unsure get help. Also be sure to check spring length and cams for scoring especially if any belt problems have occured. Cams can sometimes be polished if scored and cams in last approx. 10 years have been very precisely ground. Good luck

 

[Captain]

You should check the end play on the shaft as well. Most

 

[JoeSixPack]

Can that end play be taken up with the gearbox on the machineIJ Say take the pulley off pry the seal out and a thicker snap ringIJ There is no leak but some play, put a bar against the pulley and can feel some prying against the belt tensionIJ How about how much play is alrightIJ

 

[RamRod]

Thanks guys for the tips. Will probably get at it this week. RR

 

[Dan]

Used to find shafts loose all the time but in the last 10ish years they have been very good at holding endplay at near zero. I believe cups are sized to bore better than they used to be thus less cup movement against snap ring. When cups could move around they would wear snapring and surface of cup that wears against snapring. So you see it isn't so much that bearings are wearing but more so cups wearing against snap rings. Not saying it isn't a good idea to check endplay from time to time but it hasn't been much of a problem on fairly recent gearboxes. We find more often that input seal will start to leak after switching to synthetic oil but as easy as it was to replace seal we figure it worth the switch. Thanks for your tips.

 

[Dan]

Yes play can be taken up on machine. Good idea to have torque sensor cams and spring checked when sensor is removed. I believe book will call for .002 to .005" endplay on these shafts so if you can fell play it is likely to much. We set endplay at point that next larger snapring can't be installed without tapping it into groove. Oh and to make job easier on the old N5's threw R70's we pull torque senser away from gearbox to point it hits cross brace between grain tank and clean grain elevator. At that point we cut away enough material from brace to allow torque sensor to come off. You don't lose enough material from brace to make any difference but we will put filler back in to make it look neat. Catch you later