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steve(ill) 
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Joined: 11 Sep 2009
Location: illinois
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 Topic: Batwing mower gear box
Posted: 26 Nov 2022 at 9:41pm |
Just acquired an older 15 ft double wing mower.. The gear box on the two wings does hot have a square shaft sliding inside a tube to drive the input.. It has a square drive shaft that goes THRU the gear box and out the back end. As you raise and lower the wing, the drive shaft slides THRU the gear box as needed... Never seen this before... No name on the box or the batwing... Anyone know what this mower is, or who made the gearbox ?
Edited by steve(ill) - 26 Nov 2022 at 9:43pm
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Ky.Allis
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Joined: 31 Jan 2010
Location: Kentucky
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Posted: 26 Nov 2022 at 9:51pm |
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It's a Woods batwing. They made them like that for years. Pretty sure Woods made their own gearboxes on those. It's a mod. MD 315 or HD 315. Both these models had (3) 5' sections. If the center section is wider with 4' wings, then it's probably a mod. B 315
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Mikez
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Posted: 26 Nov 2022 at 10:08pm |
Yup it’s a woods hd315. We have one like that
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steve(ill)
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Posted: 26 Nov 2022 at 10:11pm |
Thanks Steve... you got me in the right direction... The box output shaft ( blades) wiggles up and down a small amount.. less than 1/16 .... was trying to figure out how to adjust if possible.. or maybe not too bad for now ?
Guy had all kinds of problems with the hitch and pto shaft drive in the front.. I though he had cobbled it all up......... just looked on the internet and it showed a B315 and the hitch and pto shaft look just like mine.... The FRONT shaft to the tractor is maybe 2 ft long and SOLID.. does not extend.. Connects to a extendable shaft back to the FRONT gear box.. The TOWER where they meet rotates fore and aft and has a carrier bearing for the back shaft..... HOW is that suppose to work with the front shaft SOLID ? Looks like it was original ...i dont like that design..... here it is on the internet.
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Mikez
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Posted: 26 Nov 2022 at 10:29pm |
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Yes the short shaft is solid. The long shaft that goes to gear box is the one that extends. Ours the carrier bearing in that tower just has a single pin holding it between the two supports and it allows it to swing as shaft extends an retracts. Make sure the two brackets are straight so that carrier bearing can swing in there. We fond the top bolt with spacer that ties the two tower brackets together, was to tight and caused carrier bearing to bind. Put a washer with spacer and works good now.
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Mikez
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Posted: 26 Nov 2022 at 10:32pm |
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Hard to see with you shields there. There should be a bolt an spacer at top to keep the two brackets spaced in a way the carrier bearing can swing freely
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steve(ill)
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Posted: 26 Nov 2022 at 10:33pm |
OK Mike... this one the tower is all beat to crap.. Drags bad........ I really dont like that design with the front shaft so short to the tractor.... Thinking about moving the carrier bearing back 18 inches and mounting to a tower that does not move. Then make the FRONT shaft 18 inches longer and have a telescope tube for it to extend.... Rear shaft has to extend a little as you raise the tongue up and down..
Might work OK if everything was just right as you said.... I just dont like that design with the short , solid shaft..
the photo above is not mine.. got the photo off the internet.. The tower i have looks like it went thru the war.. got in a fight with a sledge hammer and lost.. Bent / twisted / extra weld brackets on it..
Edited by steve(ill) - 26 Nov 2022 at 10:35pm
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Like them all, but love the "B"s.
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Ky.Allis
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Posted: 26 Nov 2022 at 10:38pm |
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Believe me, it works. I had a B320 (20') made exactly the same. Bought it new in 1974 and sold it 3 years ago when I sold my farm. In all that time, I never replaced a single U-joint or any other part of the driveline. Just kept it greased and stored inside. Keeping all the sliding shafts greased good is critical. The wiggle in the blades is normal, but if it gets worse, they make shims that go on the top side of the crossbar the blades are mounted on. In 1974, I paid $3,000 for mine and used it 45 years, then sold it for the same as I paid for it new. My Dad always said it was the best piece of equipment we ever bought and it mowed thousands of acres over the years. The "H" frame the carrier bearing is mounted on moves fore and aft as you mow, so there's no need for that section to telescope.
Edited by Ky.Allis - 26 Nov 2022 at 10:42pm
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steve(ill)
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Posted: 26 Nov 2022 at 10:51pm |
OK.... you guys have almost talked me into it... I would need to make a new tower and install in place of the old one.. Its too far gone.. Front shaft just seems too short, but if you have that kind of luck, i will do it your way. ... NEW PARTS, original design..
Thats good to know on the gear box wiggle.. I didnt want to get into them this year. Sone just got the thing 2 days ago... Winter project for me to get ready.
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Like them all, but love the "B"s.
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DiyDave
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Posted: 27 Nov 2022 at 4:39am |
NH balers had a similar set up, the front shaft short and fixed, the longer shaft (to the flywheel) telescoped. as others have said, lubrication prevents wear... 
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SteveM C/IL
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Location: Shelbyville IL
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Posted: 27 Nov 2022 at 9:37pm |
My Woods 72 has similar. Solid short up front,carrier brg which pivots not swings in tower and slip shaft from carrier to gear box. When turning the tower and shield over shaft move fore and aft while the shaft telescopes ahead of gear box. Dad bought it 40? years ago?
I'm pretty sure AC pto equipment (all crop combine,rake etc) had a short solid front shaft and slipped downstream. Don't think a slip in that short shaft would be good idea. With the short front shaft and drawbar length correct, it works like a CV joint when turning.
Edited by SteveM C/IL - 27 Nov 2022 at 9:42pm
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farmboy520
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Posted: 28 Nov 2022 at 8:28am |
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I had a HD315 for a number of years. I didn't have the best of luck with the wing u-joints. It seemed every year I would have one break. I was using my 7010 on it. Always greased everything like it called for or better.
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On the farm: Agco Allis 9695, 7060, 7010, R66, Farmall H, and Farmall F20 (Great Grandpa's)
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