arto98607
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Rear Axle Failure, Max 28, Service Manual Pages?
- Thread starter mike69440
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doneill127
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Deleted my post not my business
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mike69440
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- 1984 Kubota B7200D (Sold 2015,) 2005 L39 Kubota, 2006 RTV 900 1997 Komatsu PC75UU2E w/ Thumb & Blade, 2013 Mahindra Max28XL Shuttle
What you see is what you get.
the casting designers newer spoke to the casting engineer.
The other weak point is that the Axle lock dog in made from most likely 12L14 mild steel, So if you use it ,be very gentle and use only in an emergency, otherwise at best you are grinding metal chips in your hydraulic oil reservoir.
Thank you Mitsubishi/ Mahindra.
the casting designers newer spoke to the casting engineer.
The other weak point is that the Axle lock dog in made from most likely 12L14 mild steel, So if you use it ,be very gentle and use only in an emergency, otherwise at best you are grinding metal chips in your hydraulic oil reservoir.
Thank you Mitsubishi/ Mahindra.
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mike69440
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- 1984 Kubota B7200D (Sold 2015,) 2005 L39 Kubota, 2006 RTV 900 1997 Komatsu PC75UU2E w/ Thumb & Blade, 2013 Mahindra Max28XL Shuttle
Did same to my Kubota L39 with 4X the hours. L39 now has a leaky diverter valve but otherwise for a wimpy front axle and only 40 hp, incredible machine ( This was fixed in the L45 & L47) What a beast, as they should be for $70K
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mike69440
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Well I have a fix, will post info. If it works, the other side will same get reinforcement.
IF MITSUBUSHI Fixed the Axle lock, beefed up the bearing support of the casting and use roller bearings vs ball bearings in the axle and as far as i can see the Max26-Max28 would last forever. Shame the F__ed up a basically stout design. The axle housing is also too narrow as bearing spacing should be increased.
If you were pulling a plow and caught a root or a rock, this could happen to you.
IF MITSUBUSHI Fixed the Axle lock, beefed up the bearing support of the casting and use roller bearings vs ball bearings in the axle and as far as i can see the Max26-Max28 would last forever. Shame the F__ed up a basically stout design. The axle housing is also too narrow as bearing spacing should be increased.
If you were pulling a plow and caught a root or a rock, this could happen to you.
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mike69440
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At the Point I start to put it all back together.
Mitsubishi Max26/28 you need to go into it eyes wide open.
Max is 99% really heavy & well built. It is that 1% that gets you.
Heavier built and higher capacity than most tractors it size. if you can get it for thousands less, worth considering if only if you have need for a little beast, as the Max26/28 has some deficiencies.
Engineered with buy out spec'd generic parts, as opposed to Kubota vertical integration where they build everything in house, causes lapses in quality and engineering.
Shows up in electrical and hydraulics, fitting plastic paint, etc.
No excuse of the following either.
The differential casting is inherently weak in axle bearing support area, Phots show this.
Also the dog of the axle lock is made of mush metal.
Metal chips can get in the bearing. A shielded bearing or a bearing slinger would help.
I realize the Max28 is made by Mitsubishi and sold as a Mahindra and Cub Cadet.
Kind of explains why Toyota/Kubota is better car than Mitsubishi Auto or Tractor.
Not that Kubota doesn't screw up, but less likely given the company culture.
Note in photo what is tossing around the Max28.
Mitsubishi Max26/28 you need to go into it eyes wide open.
Max is 99% really heavy & well built. It is that 1% that gets you.
Heavier built and higher capacity than most tractors it size. if you can get it for thousands less, worth considering if only if you have need for a little beast, as the Max26/28 has some deficiencies.
Engineered with buy out spec'd generic parts, as opposed to Kubota vertical integration where they build everything in house, causes lapses in quality and engineering.
Shows up in electrical and hydraulics, fitting plastic paint, etc.
No excuse of the following either.
The differential casting is inherently weak in axle bearing support area, Phots show this.
Also the dog of the axle lock is made of mush metal.
Metal chips can get in the bearing. A shielded bearing or a bearing slinger would help.
I realize the Max28 is made by Mitsubishi and sold as a Mahindra and Cub Cadet.
Kind of explains why Toyota/Kubota is better car than Mitsubishi Auto or Tractor.
Not that Kubota doesn't screw up, but less likely given the company culture.
Note in photo what is tossing around the Max28.
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mike69440
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Looks like the max28xl rear end is almost identical to my 2415 that broke in almost the exact same spot.. How is this fix holding up for you? I just bought this tractor and did not know it was broken, I'm curious what caused it. You said you just hit a hole?
Mine also has the same axle lock as yours. How did you modify it so it won't act as a metal shaving dispenser?
Mine also has the same axle lock as yours. How did you modify it so it won't act as a metal shaving dispenser?
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mike69440
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That sucks you got stuck with a broken tractor. Bet the bill of sale said "As Is"
Regarding my repair, using 3 Lbs. of epoxy I suspect repair is stronger than original Cast Iron. Plus 10,000 psi compressive strength.
I added epoxy to both sides.
Tractor is not back together yet. It is going to tale a while. Heart surgery due on the 8th of September & parts not in yet.
Repair is a real pain.
In any case I polished the activation arm on the diff lock so it will not tear up the bearing surface and will try one of the following between the arm and the Dog sleeve.
(Part 13 and Part 20 of Fig 511)
www.mcmaster.com
or
www.mcmaster.com
However.
If you engage the diff lock, try to do it at a stop or rock it gently to lock.
Me bad. I was engaging in motion, and letting it grind till it engaged. This is not an Eaton locker by any means.
Regarding my repair, using 3 Lbs. of epoxy I suspect repair is stronger than original Cast Iron. Plus 10,000 psi compressive strength.
I added epoxy to both sides.
Tractor is not back together yet. It is going to tale a while. Heart surgery due on the 8th of September & parts not in yet.
Repair is a real pain.
In any case I polished the activation arm on the diff lock so it will not tear up the bearing surface and will try one of the following between the arm and the Dog sleeve.
(Part 13 and Part 20 of Fig 511)
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
McMaster-Carr
McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.
If you engage the diff lock, try to do it at a stop or rock it gently to lock.
Me bad. I was engaging in motion, and letting it grind till it engaged. This is not an Eaton locker by any means.
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mike69440
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There is a drain plug on the Diff housing to drain the oil from the Axle housing area. Suggest everyone drain the the side where the axle Lock is to see if there is metal in there?
Magnetic drain plug would not hurt here also.
The axle housing is cast aluminum. I would have thought this was the weak point, but not so. Still, as aluminum housing makes sense manufacturing and machining wise, maybe beef the casting up maybe 25-30%?
Spherical Roller bearings in the axle would be a last forever improvement over ball bearings.
Mahindra should pay me for my engineering knowledge.
Magnetic drain plug would not hurt here also.
The axle housing is cast aluminum. I would have thought this was the weak point, but not so. Still, as aluminum housing makes sense manufacturing and machining wise, maybe beef the casting up maybe 25-30%?
Spherical Roller bearings in the axle would be a last forever improvement over ball bearings.
Mahindra should pay me for my engineering knowledge.