How to restore a neglected M6800 Kubota back to "WOW".

   / How to restore a neglected M6800 Kubota back to "WOW". #1  

sixdogs

Super Star Member
Joined
Dec 8, 2007
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Location
Ohio
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Kubota M7040, Kubota MX5100, Deere 790 TLB, Farmall Super C
This is post one of three.

Here's how I restore a neglected tractor, or piece of equipment back to impressive condition and with a minimum of effort and while maintaining it's originality and manufacturer integrity. It's easy-peasy. First, you change as little as possible and only clean, repair, detail or improve what is already there. No customization or add-ons or do-dah stuff or anything like that. The goal is to make it look like it did when it left the factory and now has reasonable wear and tear on it.

Below is a photo of an M6800 Kubota I recently bought an auction. It sat outside for 14 years (!)--ugh--but only had 400 hours on it. It had a big plus of hydraulic shuttle shift, draft control, adjustable link ends, deluxe seat, loader and rear weights. Most important, it was owned by a meticulous 95 year old guy that changed the fluids and maintained it while only mowing grass with it. Best of all, he drilled no holes, added no whip aerials or fog horns or crap that would be hard to repair. Plus, he had the insight to at least tarp the seat. This is my kind of raw material and I bought it. I've wanted an M6800 for years.


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Here it is. Pretty sad and some buyers were scared off by it's apparent condition. I did my research first.

After getting it home, I assessed things and decided the tires were nice enough that I could buy new tires and swap the old ones for a partial credit to the tire shop. This works great for me and the net cost is then bearable plus I upgrade to a better tire. First I pressure washed and scrubbed everything squeaky clean. It actually shined up a lot. Then I took off the loader, blocked up the tractor in the barn, took the tires off and anything else that looked shaky. Oh, the rear tires were loaded so you can imagine that effort. The wife "helped".




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I wire brushed a little and Windex/paper toweled the smooth surfaces of the front axle and removed any bolts or parts that were plated or needed more attention. Just detailing. Then I rattle can sprayed (OEM ONLY) the front axle and related parts and put it back together. It doesn't have to be perfect but NO OVERSPRAY EVER!





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I ordered a set of Firestone SAT II 23 degree long bar/long bar tires because they are durable, quality and work great in dirt. Plus they look nice. I had the shop dismantle the tires so I could separate the wheels from the centers and paint things correctly (OEM ONLY). No paint on the bolts, because that would look obvious, I just sprayed those with oil. Most anything not painted gets sprayed with oil to stop rust and create a patina as things age. My stuff stays out of the weather.




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Then on to the back axle. I disassembled many parts and rattle can (OEM ONLY) sprayed them separately--just like the factory. ZERO overspray is allowed and detail must be perfect. Mask with blue painter's tape. No bolts were sprayed unless they came that way from the factory. The other bolts might have had the threads chased and then sprayed with oil from a can with a straw tip. Works great with the straw.




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Then I started to assemble the basics. It may look nice from 20' but it's not.



But wait; there's more plus it's on to the loader in the next post. I'll post those pics in a couple minutes. Stay tuned.
 
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   / How to restore a neglected M6800 Kubota back to "WOW". #2  
Re: How to restore a neglected tractor back to "WOW".

Looks great so far, lots of cleaning and touch up effort.
 
   / How to restore a neglected M6800 Kubota back to "WOW".
  • Thread Starter
#3  
Re: How to restore a neglected tractor back to "WOW".

Post two

Next I removed the loader frame brackets with my Harbor Freight rolling shop crane/engine hoist earlier and spray painted (OEM ONLY) outside on my Harbor Freight free tarp with the higher quality Harbor Freight HVLP spray gun. Then it was on to detailing the engine. You know the drill. Piece of cake. Bolts, unless factory painted got sprayed with oil.

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I'll change the fluids later.
Also, I pulled all the loader pins out, cleaned the holes and wiped the pins clean and new grease. One was nasty--did thread on it--so replaced it. Others looked like new.





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Next I used a strong cleaner on the paint and then cleared/waxed it again. I used plastic restorer on the grill and got a new grill emblem that was difficult to get to stay stuck. No sheet metal was painted because it would look painted and I would never get the new decals factory perfect. All other decals were replaced if needed. The steps and related parts were removed and painted but not the bolts because they came plated. Oil spray on them.

The fellow cut the exhaust stack to put on a rain flapper (thankfully) so I had to deal with that. To do that plus replace some missing heat insulation under the hood, I had to remove it and that took three people because it was awkward. I washed the back of the instrument panel and waxed floor panels and painted only the visible edges under the mats. Detail, detail, detail. Underneath, I sprayed oil on anything that looked like rust. The hood had a dent on one side that I just pounded out. A professional repair would be obvious and wrong. Hey; tractors get dents.




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Then I started taping loader points, took pictures of where decals went and taped the ones that stayed. Detail.





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Then I wire wheeled the decals off and any or most rusty stuff and sort of taped it. I don't want an auto quality finish because it never had an auto quality finish. Next was the bucket.



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The hard part was handling the bucket without scratching it. I decided to not paint the bottom because I ran short of paint plus how many bucket bottoms with 400 hours have paint on them after 14 years? Not this one.




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Now I'm feeling better. Some decals not on. More in a minute
 
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   / How to restore a neglected M6800 Kubota back to "WOW". #4  
Re: How to restore a neglected tractor back to "WOW".

'dogs, you obviously "have the touch" and the patience to do this kind of work. You are going to wind up with a basically new tractor with only 400 hours on it. It will be interesting to see your finished product.

14 years of weathering "begone"..:)
 
   / How to restore a neglected M6800 Kubota back to "WOW". #5  
Re: How to restore a neglected tractor back to "WOW".

Very nice work sir, let me know when you catch up on your projects, I'll drop off my '97 555E as it's looking pretty old!
 
   / How to restore a neglected M6800 Kubota back to "WOW". #6  
Re: How to restore a neglected tractor back to "WOW".

This looks great! It's always fun to follow your painting projects.
 
   / How to restore a neglected M6800 Kubota back to "WOW".
  • Thread Starter
#7  
Re: How to restore a neglected tractor back to "WOW".

Part three of three


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Here's the dent I pounded out. It's not perfect and I didn't want it to be. It looks honest because it is. No painting of the sheet metal.




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Looking better. Where's that dent now? Still there but eye is drawn elsewhere.




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Added a work light because I had it. Bought years ago and never used.




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Here's that fixed exhaust stack. Excuse TBN-induced sideways pic. I wanted an OEM stack but wanted my $200 :)eek:)more so I discovered that a piece of hot rod mandrel bend exhaust tubing was a tight slip fit. Can't tell even if up close unless you know.


There's plenty more I didn't mention or photo because it's all basic detailing. Oh, there was a crack in the rear fender so I carefully fixed with epoxy. The headlights were fogged inside. I changed all the fluids and had to flush the cooling system multiple times plus will do cooling again next summer. The wheel weights were painted and put back on with my engine hoist/shop crane thing.

The M6800 Kubota is often referred to as the best tractor they ever made. Probably not the best but lots of HP and features in a sweet little package.

Tractor is already dirty and field dusty and people have remarked it's just like new. "You sure were lucky to find one in such nice shape". Yeah, guess I was. :dog:
 
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   / How to restore a neglected M6800 Kubota back to "WOW". #8  
Re: How to restore a neglected tractor back to "WOW".

Tractor is already dirty and field dusty and people have remarked it's just like new. "You sure were lucky to find one in such nice shape". Yeah, guess I was.

If they only knew.:)
 
   / How to restore a neglected M6800 Kubota back to "WOW".
  • Thread Starter
#9  
Re: How to restore a neglected tractor back to "WOW".

Very nice work sir, let me know when you catch up on your projects, I'll drop off my '97 555E as it's looking pretty old!

That 555E is a TLB, right? If so, you can drop it off..:D. It might take me a couple of years because I have some projects to do with it first but I'll eventually get around to it...maybe...:laughing:
 
   / How to restore a neglected M6800 Kubota back to "WOW". #10  
Re: How to restore a neglected tractor back to "WOW".

Congrats. That's one great find and an excellent refurb job.

Good luck
 

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