Wood BatWing 315 gear box teardown

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   Son got a 315 about a year ago and i came on here to get info for repairs.. Welded up the frame, new drive shafts, U-Joints, tires , cleaned and painted.... They used it to cut 25 acres a couple times this summer... Now i am going to disassemble one wing gear box and replace the bearings.
Blade / hub unit came off easy.. Nice design. Got the box out no problem  ( this is the one that has the square drive shaft thru the center of the box).. Took side plate off and pulled the bevel gear and shaft.  The PINION is looks and wiggles up and down 1/8 inch. Pulled the seal off the end and i can see the sleeve that sets up against the bearing. I was ASSUMING i would find an adjustment nut to set the bearing preload ???  Nothing there... Pounded on shaft and it does not want to move ?   What holds the lower bearing #16 UP into the hosing ?  How do i get the shaft  #15 OUT ??  It appears you just POUND HARDER... but how do you adjust the bearings ?

#20 is the seal, #21 is a washer and #22 is a sheet metal dust cover..

Edited by steve(ill) - 09 Nov 2023 at 4:13pm

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 85458	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Topic: Wood BatWing 315 gear box teardown Posted: 09 Nov 2023 at 4:11pm
	Son got a 315 about a year ago and i came on here to get info for repairs.. Welded up the frame, new drive shafts, U-Joints, tires , cleaned and painted.... They used it to cut 25 acres a couple times this summer... Now i am going to disassemble one wing gear box and replace the bearings. Blade / hub unit came off easy.. Nice design. Got the box out no problem ( this is the one that has the square drive shaft thru the center of the box).. Took side plate off and pulled the bevel gear and shaft. The PINION is looks and wiggles up and down 1/8 inch. Pulled the seal off the end and i can see the sleeve that sets up against the bearing. I was ASSUMING i would find an adjustment nut to set the bearing preload ??? Nothing there... Pounded on shaft and it does not want to move ? What holds the lower bearing #16 UP into the hosing ? How do i get the shaft #15 OUT ?? It appears you just POUND HARDER... but how do you adjust the bearings ? #20 is the seal, #21 is a washer and #22 is a sheet metal dust cover.. Edited by steve(ill) - 09 Nov 2023 at 4:13pm
	Like them all, but love the "B"s.

Sponsored Links

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 85458	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 09 Nov 2023 at 4:18pm
	last year
	Like them all, but love the "B"s.

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 85458	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 09 Nov 2023 at 8:09pm
	MAN... i cant find NOTHING on line about the gearbox or how to assemble it... Its obvious that nothing on the box photo above is holding the bearings / preload to any point.. So i looked at the BLADE/ HUB and there appears to be a couple SHIMS on the mounting bolt ??? Im wondering if you put loctite on the sleeve below the bearing and tap it in so you have a few thousands clearance and let it dry............. install on mower and then slide the blade hub on the bottom until it TOUCHES the sleeve above ??... Then measure the stand out and add shims to get to ZERO.... and the HUB holds the sleeve and bearing into place ( with the original loctite ??? That is ODD way to do it...... If thats the case, then i should be able to HEAT the sleeve and then pound the shaft upward into the housing ??? Just dont want to break anything.. Just wondering if anyone has see this before or done this ?.... #121 , 122 look like shims ?
	Like them all, but love the "B"s.

SteveM C/IL Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 8467	Post Options Post Reply Quote SteveM C/IL Report Post Thanks(0) Quote Reply Posted: 10 Nov 2023 at 8:54am
	Just replaced the housing on a 72in model this summer. Same kind of construction. There are some shims for brg play as you think. I think it took light press work to remove/install the output shaft through the brgs.

steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 85458	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 10 Nov 2023 at 12:42pm
	YEA... i got it apart.. Thought maybe shock load would be better than a press... I heated the seal sleeve and then put a brass plate on the end of shaft and smacked it 10 times HARD with a 5 pound hammer... Then measured and it move 1/4 inch...... So i kept that up... about 50 WHACKS later and its off....... Measured the bearing and shaft and about .001 interference fit ....... Will buy new bearings and seals... Guess they should be heated to slide on the shaft and pushed into position... The DONT move easy !.
	Like them all, but love the "B"s.

DaveKamp Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Apr 2010 Location: LeClaire, Ia Points: 5957	Post Options Post Reply Quote DaveKamp Report Post Thanks(0) Quote Reply Posted: 18 Nov 2023 at 1:01am
	I wouldn't put any significant heat (i.e. not a flame or induction coil) on anything for that... at 0.001" interference, I'd just make sure surfaces were clean and lightly oiled, engagement was straight, and press it. If I was REALLY concerned, mebbie I'd put the inner component in the freezer... but not much more. I'd probably put a little dychem on the teeth and rotate it, check tooth interface issues. The gearbox's circumstance will naturally self-heat in operation, and it has a very generous operating tolerance, so what it feels like at room (shop) temperature, and what it experiences in the field are significantly different. I don't think there's enough criticality in there that they would've felt inclined to publish a tech document on it... or they just say "Call your dealer", right?
	Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.