mikeeyre74 289 #1 Posted March 22, 2015 (edited) Hey fellas! New guy here.. just picked up a '77 B-80 with the 8hp Kohler. It needs a bit of work, but it's solid. My dad bought one similar to this when I was a kid and its the first tractor I ever drove, I think. In any case, I'm having a bit of an issue with one weird thing on it.. On the PTO lever, there's a tab welded on that makes contact with the little ball safety switch thing, to make sure you have the PTO disengaged when starting the tractor. I get that, it's cool. On that tab, opposite the end that depresses the switch, the tab extends out the other way, and there's a hole drilled into it. Two questions: 1) what is the purpose of that tab with the hole? 2) That same tab with the hole is hitting the bolt head that holds the dashboard part up on top of the column where the steering wheel comes out. It makes it so that you can't fully pull the PTO lever bacl to put the "brakes" on the PTO pulley. Can that tab simply be cut off to fix "the issue" or, as in question #1, does it serves some purpose? If so, how do I get it so that tab doesn't hit the bolt? I had to shim the PTO lever shaft towards the right side of the tractor while sitting on it, by putting a washer behind the C-Clip on the left hand side of the lever, to make it depress the ball safety switch, because otherwise, it wasn't making full contact and the tractor wouldn't start unless I pulled sideways on the lever to press the switch in. that seems wrong to me, so I shimmed it.. and made a problem for myself to boot! And advice? Mike Edited March 22, 2015 by mikeeyre74 Share this post Link to post Share on other sites
KC9KAS 4,744 #2 Posted March 22, 2015 Sorry I can't help, as my B-80 is a 1975 and I don't have that safety switch....maybe the PO removed it. But, , and Someone will be along to answer your question. Share this post Link to post Share on other sites
groundhog47 347 #3 Posted March 22, 2015 (edited) This isn't your answer but to Here's a parts diagram, thanks Admin (for manual): In attached drawing 35 is a shim, 30 spacer, 31 bushing, 34 washer, 32 e ring if your set up hasn't been modified the other tab (with hole) is for the pto engage rod. Hope this helps Edited March 22, 2015 by groundhog47 Share this post Link to post Share on other sites
WH nut 553 #4 Posted March 23, 2015 How about a picture so we can see what you are talking about? Share this post Link to post Share on other sites
mikeeyre74 289 #5 Posted March 23, 2015 If I could figure out how, I would! Oh! Well now, there it is! I tried that yesterday and it didn't work...but that's the tab with the hole in it, anyway. The PTO lever goes in the OTHER tab welded on to the shaft.. the opposite side of the tab I'm pointing at there in the picture is what makes contact with the PTO safety switch. Share this post Link to post Share on other sites
WH nut 553 #6 Posted March 23, 2015 Im going to have to go out and look at my B80s to see what that's all about Share this post Link to post Share on other sites
groundhog47 347 #7 Posted March 23, 2015 (edited) Gee, that is strange. If you had that hole welded closed does it appear it woud work? May even try a short carriage head bolt and grind round head flatter and use a thin nut on outside. Like WH nut I'll hafta look at the C-120 which is same setup by IPL. Of thee types don't recall seeing a hole in any at switch contact point. Just found a pic of one on ebay (posting ad not permitted) with hole, but hole or tab is 180 deg diff. Is your operator handle pointing up or down? The one on ebay is listed as 103881 but looks like tabs are equi centered on rod and are same part welded on at different "clock" rotation. Could you pan out a bit on pic and place selector in "PTO engaged" position? Edited March 23, 2015 by groundhog47 Share this post Link to post Share on other sites
WH nut 553 #8 Posted March 23, 2015 I checked mine and the extra hole does nothing. The switch should contact just above the hole Share this post Link to post Share on other sites
mikeeyre74 289 #9 Posted March 23, 2015 (edited) It's the opposite side of that tab with the hole that makes the PTO switch close.. not the side with the hole itself. I just can't figure out why its there, and because it IS there, it's causing me interference issues with the bolts that hold the dash in place. I'm just concerned that if I cut it off, I'll regret it later! I think I attached this pic correctly. Here, you can see the extra "tab" with the hole just behind the tab nearest the handle on the PTO lever that actuates the PTO clutch. You can see the tab with the hole and the interference on the bolt head right above it, and you can see the safety switch for the PTO itself where the "good side" without the hole in the tab makes the connection there. Does this make more sense now? Mike Edited March 23, 2015 by mikeeyre74 Share this post Link to post Share on other sites
bmsgaffer 2,052 #10 Posted March 23, 2015 (edited) Is your PTO lever vertical when its hitting that bolt? I believe the PTO brake should be adjusted so that you dont "apply" them. When you release the PTO to that vertical position the brake should be applied automatically. Hopefully Bob (rmaynard) will chime in here, he has had a few B series and will probably have the good answer. Edited March 23, 2015 by bmsgaffer Share this post Link to post Share on other sites
groundhog47 347 #11 Posted March 23, 2015 (edited) It's the opposite side of that tab with the hole that makes the PTO switch close.. not the side with the hole itself. I just can't figure out why its there, and because it IS there, it's causing me interference issues with the bolts that hold the dash in place. I'm just concerned that if I cut it off, I'll regret it later! I think I attached this pic correctly. Here, you can see the extra "tab" with the hole just behind the tab nearest the handle on the PTO lever that actuates the PTO clutch. You can see the tab with the hole and the interference on the bolt head right above it, and you can see the safety switch for the PTO itself where the "good side" without the hole in the tab makes the connection there. Does this make more sense now? Mike Ok great view, mine is same way and a 76 C plus one off a 74 C is same. I would sumize that both the inside and outside tab are same and to cut cost they just kept the same. In the pic the tab portion that would hit bolt if continued upward shold not need to go upward further anyway. As for putting on the brakes do you mean the brake on pto bell? That brake adjusts in or out to specific setting (in manual), and the adjustment on bell crank trunion should also be a specific setting. Ya prob already know all this. The main thing is "forward" engaged, "back" relax pto bell to swing outward with either internal pto bell spring or loop clevis but not to extend "out of range" of pto "off" switch. The opposite of switch tab may very well be intended as a stop/limit function, I'd keep it and continue with L-R play of shaft, adj brake, and pto disc clearances. In first pic it looks as if bushing #30 is missing, check all those 5 parts are there. http://www.wheelhorseforum.com/files/download/3570-tractor-1977-b-series-8-speed-da-om-wiring-803643r1pdf/ see page 19 of pdf (pg 17 in book)( Tractor 1977 B-Series OM Wiring #803643R1.pdf) from this avail download for pto and brake (pto) adj (Thanks to Garry for submitting) Edited March 23, 2015 by groundhog47 Share this post Link to post Share on other sites
WH nut 553 #12 Posted March 24, 2015 It's the opposite side of that tab with the hole that makes the PTO switch close.. not the side with the hole itself. I just can't figure out why its there, and because it IS there, it's causing me interference issues with the bolts that hold the dash in place. I'm just concerned that if I cut it off, I'll regret it later! I think I attached this pic correctly. Here, you can see the extra "tab" with the hole just behind the tab nearest the handle on the PTO lever that actuates the PTO clutch. You can see the tab with the hole and the interference on the bolt head right above it, and you can see the safety switch for the PTO itself where the "good side" without the hole in the tab makes the connection there. Does this make more sense now? Mike Mine is 180 degrees out from yours and its on right Share this post Link to post Share on other sites
Ed Kennell 41,406 #13 Posted March 24, 2015 Here are some pics of my C-120. PTO disengaged.... you can see the inner tab has depressed the safety switch and the other end of the tab with the hole acts as a stop against the bolt head. PTO engaged ... It appears you need to adjust the length of the rod to the PTO hoop cam plate. Share this post Link to post Share on other sites
mikeeyre74 289 #14 Posted March 25, 2015 I see what you mean there. I'll have to look in to that missing bushing #30 thing still, but maybe this can all be fixed with an adjustment on the "PTO bell" as it was called? Man, they think of everything, don't they! Mike Share this post Link to post Share on other sites
