mitsubishi 210d

[porta mill]

I have a mitsubishi 120d the front wheels are not driving so I guess the shere pins are broke . does any one have a clue where they are , becides the obvious on the drive shft some where. or any other suggestions on other easy places to start if they are not broke .

thank you
ANY HELP WOULD BE APPRECIATED

 

[Kernopelli]

I own a different model but it is probably similar enough to tell you where to look. If memory serves me correctly there is only one shear pin. At the juncture of the drive shaft/ front differential there is a round metal case that covers the drive shaft. It is a two piece case that is bolted together, you will need to take that off and inspect the pin (it will be obvious where it goes at this point).
If that is OK, there is a square metal case that is bolted together at the back end of the shaft, take the bottom piece off and look for obvious problems there.
If it is neither of these, I would guess you will need to start looking for problems with the 4x4 engagement lever and then inside the trans case, which is actually pretty straightforward to get into from the top and check the internals for problems.

 

[oliver28472]

If it's like my S-470, your front driveshaft will have a spline yoke that slips on the front differential pinion shaft. That yoke is held in place by a pin that goes through the yoke and shaft. The yoke has a little groove in it that an o-ring fits in to hold the pin in place. If you are lucky, the o-ring may have rotted away and let the pin fall out and it will be in the two piece sheet metal cover. I replaced my o-ring with a small piece of wire.

 

[PILOON]

Don't believe that there are shear pins in the FWD drive train.

The drive shaft comes out of transmission splined, downwards to a U-joint system and into the front differential where it is also splined to allow for movement.

Maybe in the FWD lever engagement arm and that would be easy to determine as the lever would be real sloppy (like no resistance when moved in and out of 4wd) if that is the case there is probably a shaft key that may be sheared.
That is a 'maybe possible' as one often gets his feet tangled in those levers and if you wear size 12's (like me) you know what I mean!

Another possibility is a bent shifting fork.(inside of transmission)

There would be a Ujoint (shrowded) up near the front Differential, but if a U-joint is broken it will be noisy and you will know it.

Scarey is perhaps a ring gear or pinion failure (again noisy probably crunching noises).

Give a few more clues, like noises and where from etc etc.

Been there, but I had a scrapped ring gear (all gear bolts sheared away and literally dropped the ring gear)

 

[porta mill]

thanks for all the input havent had the time this week to go look at the tractor yet . but i will saw if I ingague the 4wd lever. I can tell it is doing something in the trans no noise but i notice a differance. I had the front wheels off the ground and the back wheels were spinning and the diff lock was ingagued the front wheels were spinning but when I reached down I was able to stop the front tire from spinning . I know that was not a smart thing to do but noticed the frount wheels were not digging in when the back was that is what led me to this post

 

[oliver28472]

I'm rethinking my post a little and what I said is still correct. But if that pin fell out of the splined yoke it would not be a problem until the yoke slides off the shaft. If that happened there would be enough noise to cause you to investigate. What I'm saying is the pin is probably still there.

 

[PILOON]

thanks for all the input havent had the time this week to go look at the tractor yet . but i will saw if I ingague the 4wd lever. I can tell it is doing something in the trans no noise but i notice a differance. I had the front wheels off the ground and the back wheels were spinning and the diff lock was ingagued the front wheels were spinning but when I reached down I was able to stop the front tire from spinning . I know that was not a smart thing to do but noticed the frount wheels were not digging in when the back was that is what led me to this post

OOps, you scare me!

Sounds like when my ring gear bolts sheared.
The pinion still turned the ring gear but with all the 8 bolts sheared the ring gear simply would turn on the cage when under load.
Like you when jacked off of the ground the front wheels did turn but the slightest friction (like hand grabbing) would stop rotation.

On the upside, if there are no noises you might salvage the gears.
In my case I had some broken teeth and needed to replace the gears--Ouch, costly! (quotes ran from $400-1600)

Another user reported that he had that same failure more than once

Mitsu uses bent metal tabs to lock the ring gear bolts and they had worked loose.

My solution was to drill the heads and safety wire them as well as using locktite on the threads and for an extra precaution I used higher grade bolts.

Both the other fellow and myself do a lot of front loader usage, probably more suitable to skid steer work.

If that is your case as well, you need lots of rear weight otherwise the front drive train is taking all the strains as the front is basically ' front assisted' and not nearly as strong as the rear drive!

Today when using the FEL I generally load mainly with 2 wheel drive 'attack' at the pile and finessing (curling as I lift) the bucket to fill it.

I used to move and place a 10 wheeler load of crushed stone in less than an hour per load. (like surfacing a driveway from a 10 wheeler dumped pile or spreading gravel for a foundation floor or top-soiling a lawn= really bobcat chores)

Good luck, and keep us informed!