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welding an axle shaft on mtd mower?

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deanop

05-11-2005 07:28:16

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i was wondering if i could weld a broken shaft on my mtd mower (i'ts the l.h. axle shaft of the transaxle. if its possible should i arc weld or gas weld? and what kind of rod to use...i don't know what the shaft is made of...thanks

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Redmud

05-12-2005 06:15:13

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Re: welding an axle shaft on mtd mower? in reply to deanop, 05-11-2005 07:28:16

I would check with local backyard mower repairman. most have a large stock of junk riding mowers, and when they send them to the scrapyard, most still have the transaxle attached. And don't just look at MTD mowers for that axle.

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Davis In SC

05-11-2005 18:21:42

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Re: welding an axle shaft on mtd mower? in reply to deanop, 05-11-2005 07:28:16

Is there enough room & clearance to put a bored sleeve over both pieces & then weld the ends ??? Just a thought ..... .

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T_Bone

05-12-2005 04:04:29

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Re: welding an axle shaft on mtd mower? in reply to Davis In SC, 05-11-2005 18:21:42

Hi Dean,

Not knowing more info, shaft size and location of break, Davis has a good idea.

If trying to butt joint weld, I would probably would grind both sides to a "V" blunt point then aneal both pieces (heat dull red then let air cool) then use a piece of angle iron for a holding jig, then weld, then let cool (removes stress), then reheat to 500� and quinch in oil(adds temper).

As long as you keep the weld clean (remove all slag) between each pass then stick welding would not be a problem. A 3/32" electrode size would work best using higher than normal amperage as I'm betting your in the 1/2" to 5/8" shaft size.

T_Bone

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deanop

05-11-2005 18:04:23

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Re: welding an axle shaft on mtd mower? in reply to deanop, 05-11-2005 07:28:16

thank you for replies....its just an old rider i got for nothin...i'll let ya know what worked/didn't/or if i buy new..

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PJW

05-11-2005 17:35:23

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Re: welding an axle shaft on mtd mower? in reply to deanop, 05-11-2005 07:28:16

If you know someone with a lathe have them face off the damaged section. Drill / ream (or bore) a hole in each end and press a rod connecting both parts. Bevel the damage area and arc weld. Turn the weld clean on the lathe and straighten. I have used this process to weld and repair crankshafts.

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paul

05-11-2005 15:24:19

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Re: welding an axle shaft on mtd mower? in reply to deanop, 05-11-2005 07:28:16

I was thinking a mounted mower, & currious what kind - but the brain finally kicked in and you are saying a MTD riding lawn mower!!!!! Oy. This rain has to stop, my brain is as grey as the weather the past week.....

--->Paul

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Dieselrider

05-12-2005 04:21:50

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Re: welding an axle shaft on mtd mower? in reply to paul, 05-11-2005 15:24:19

Hey Paul, send some of that rain on through to PA will ya? The governor must have passed an ordinance against rain. Everything gets to the border and breaks up. We could use some water.

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MAC,IL

05-11-2005 14:37:50

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Re: welding an axle shaft on mtd mower? in reply to deanop, 05-11-2005 07:28:16

Possibly, but it has to be straight, else you will probably do more harm than good. I would opt for a different axle.

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9NJoe

05-11-2005 13:01:01

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Re: welding an axle shaft on mtd mower? in reply to deanop, 05-11-2005 07:28:16

Dean,

I would try to obtain a new shaft. They are quite common. Failing that, I would try to TIG weld it. but keep in mind, there is a LOT of force on that puppy. Bevel cut it so you get good penetration. Dont forget there are axle seals there too so TIG it and maybe it will keep them from melting. They are mild steel so it should be easy to weld.

Joe

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pperry

05-11-2005 19:15:33

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Re: welding an axle shaft on mtd mower? in reply to 9NJoe, 05-11-2005 13:01:01

first did you fix the promblom that caused it to break

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