Komatsu D20A-6 ?

/ Komatsu D20A-6 ?
  • Thread Starter
#41  
This is how they look installed:



They look much better now:



Last one:



Thanks for checking this out,

Larry
 
/ Komatsu D20A-6 ?
  • Thread Starter
#42  
Track Roller Replacement:
After acquiring the Dozer, I ordered and received a set of shop manuals, I went over every square inch of the machine to check wear limits.

Overall it's in excellent condition. The only things that are warn past their limits are the track rollers. I did quite a bit of searching for the lowest price on replacement parts, and found new OEM Rollers from someone that wanted to get rid of them. The price fit what I was willing to pay. I think the price was near or below cost, so I felt they were a bargain.

Here is an overall picture of what needs to be replaced. (Click on the thumbnail pictures for a full size image)


I figured that if the rollers are replaced now, the life of the track links will be greatly extended, thus reducing overall maintenance costs. A little preventive maintenance now will save big time in the long run.

This is a close up of the top track rollers, they will be real easy to replace:



The track links are like new - don't let a little surface rust & over painted chipped paint fool you. They are well within the wear limits, and the link bushings? (the part that is driven by the sprocket) show no signs of wear.



A picture of one bottom roller near the drive sprocket. The Drive sprocket is also in great condition:



Rob (3RRL) and his lovely wife Loretta, came to visit Esther and I. We flew the two of them out here, first because they are my friends and second in appreciation for Rob making me the gear box for my back blade project. Rob & I speak live on a regular basis. I mentioned to him what I was up to with the dozer and he graciously offered to help me replace them during their visit. It's not often that superman comes to visit you, so I better take full advantage of his Power, knowledge, and skills - Rob will be lifting the Dozer off the ground while I replace the rollers. ;)


Larry
 
/ Komatsu D20A-6 ?
  • Thread Starter
#43  
Here are a couple of pictures of Rob helping me remove the old track rollers. First we had to get the dozer completely off the ground. Using the hydraulics, I lifted the front blade off the ground to make the Dozer front heavy, then we used a 3 ton floor jack to lift up the rear of the dozer. After blocking up the rear with 6X8 blocks. Rob started to remove the outside rear rock guards so that we could remove the rear track rollers. Some of the bolts were frozen so we used a torch to heat them up for removal.



After getting the rear tilted up and blocked, Rob lifted up the front of the Dozer with one hand ;) - he didn't even break a sweat.




Larry
 
/ Komatsu D20A-6 ?
  • Thread Starter
#44  
What we really did to lift the Dozer, was use the front blade hydraulics, By lowering the blade, we were able to lift the dozer completely off the ground. After getting the front of the dozer up in the air we blocked up the front, then lowered the blade again for extra safety. It went pretty smooth and exactly accordingly to plan.

We placed a couple of sheets of plywood under the dozer for better working conditions:



This is Rob replacing one of the top rollers:



Rob & I worked together as a Dozer mechanic team. I crawled under the Dozer (in the cool shade) while Rob worked out in the hot sun. :rolleyes:

In order to remove the rollers, the track tension had to be relieved, we did that by loosening a nut that lets grease out of a cylinder. That cylinder pushes against an idler pulley holding the tracks tight. When we got the tracks loosened up we were able to remove all the bolts and track rollers.

Rob really busted his butt helping me get the rollers replaced. He held the new rollers into position while I started the threads of the bolts. Together we tightened them up. I could not have done this without his help - it was a two man project for sure and I am so thankful he was there to help me out.

Larry
 
/ Komatsu D20A-6 ?
  • Thread Starter
#45  
While Rob and I were hard at work on the Dozer, Loretta and Esther were hanging out sitting on the FEL bucket of my tractor "Goldie". They were really yucking it up having a great time.



After we finished with the track rollers, Rob took the Dozer out for a test drive:



I think Rob has more photos of this project, and I am hoping he posts them along with his version of what it took to get this done. He always tells an interesting story.

Larry
 
/ Komatsu D20A-6 ? #46  
Indeed I have more pictures.
We had such a great time at Larry's place that Loretta and I spent the first minutes loading up the pictures and going over each one as soon as we got home. There are many we have from the 6 day 5 night all expenses paid vacation at Larry and Esther's place. I will start by adding to Larry's thread of working on his bulldozer. Man, is that thing ever neat! It has so much power and is a blast to drive. Here are some photos where Larry left off.

Larry let me do the easy part while he did the hard part from under the crawler. Look closely in the shade and you will see Larry.



Larry had everything laid out for the replacement of the rollers. Those suckers are heavy at about 35 lbs each. But first was to get them all off, once he had jacked up the dozer. It was very solid on the 6 x 12 posts he made to hold it up.

 
/ Komatsu D20A-6 ? #47  
These are some really neat pictures I got of Larry.
While I was screwing around trying to take the bolts off, Larry had to heat some up to get the stubborn ones out. Then he crawled underneath to make room for the rear rollers to come out. He had to use his cutting torch to remove about 1/4" from the interior rock guards just so his bolts could come out. Wrenching from the outside was a lot easier than from underneath where Larry was working.



Here he is starting to cut some of the metal away to get 2 bolts out. You'd think it would be easier than this, but it was needed.



A closer view of Larry cutting under the crawler's belly.



It was about 90° that day but very hot in the brilliant Sun. I could tell Larry had no concept of what a vacation should be like. He does this on a regular basis at his place. Larry and Esther live about 12 miles from the nearest highway in a secluded Meadow surrounded by Pinion and Juniper trees. He has to monitor everything himself from water, toilets, electricity ... you name it....and that was AFTER he built it all himself.

I knew better than to leave my work clothes at home. I'm surprised I only lost about 12 pounds.:) Of course I made it up every night with a huge dinner and snacks after that. Sorry about leaving your pantry kinda bare Larry.
 
/ Komatsu D20A-6 ? #48  
OK so now you can see that the rollers are almost off and we are making progress.
Look again closely. Under the dozer in the shadow is Larry getting all the inside bolts loose. Just 2 more rollers on the bottom to get off now. Whew, what a job!



We still needed to get the top rollers off too. But this was a lot easier than the bottoms.

 
/ Komatsu D20A-6 ? #49  
This is when we were still installing the bottom rollers. Larry was under the crawler and I on the outside. The two of us would hold the roller in place while while trying to get the bolts started.
- Add lock washer and washer to each bolt.
- Add LockTite to each bolt.
- Hold and lift the roller into position.
- Try to start each bolt
- Larry wrenches from the inside while I wrench from the outside.
- Then torque the bolts to about a billion pounds.



It went surprisingly good once we got all the bolts wire-wheeled and clean. Here are all the rollers installed, top and bottom.
The tracks are ready to be greased, which tightens them onto the rollers. I am impressed with the knowledge Larry has of working on, maintaining and operating his bulldozer.



Here is Larry going over every bolt with his super torque cheater bar to be sure all the bolts were tight.



The work was pretty hard for an old guy like me, so we took smoke breaks about every 15 or 20 minutes and to cool off in the shade.
I told Larry, "Man, all this hard work and exercise is bad for my smoking":confused:
 
/ Komatsu D20A-6 ? #50  
I knew to keep my mouth shut if I ever wanted to drive that dozer, so I did my best to keep the smart *** remarks to a minimum. And it paid off.
Larry finally let me drive the dozer around. It is way cool!



And he even let Loretta drive the bulldozer. She enjoyed this very much.



After driving the bulldozer and seeing what it can do herself. Loretta might have a different point of view about getting one for ourselves?
OK...NOT.
In postings to follow, I will show some photos of the road work Larry did on that thing. I'll put a link to that thread in here and also a link to the rest of the vacation we had at Larry's house (as soon as I start those threads).
Anyway, it was great to see the new rollers on the dozer ready for a grueling workout later.
I'll post more through the week but I have to soak in some Epsom salt right now and change the bandages from my vacation.
 
/ Komatsu D20A-6 ? #53  
I am glad you enjoy your little dozer. I have been contemplating for two years weather to purchase one or not. I nave had 3 small dozers. Case 350, Mf 200b and a Allice Chalmers HD4 which I still have. But all these dozers are over 25 years old. I was wondering who was going to wear out first, the old HD4, made in the early 60's or me made in the early 40's. Well I the the HD won out. I have been thinking getting one that it not so hard on the arms. I had looked around for about two years, considering the little Komatsu or the Bd2 Mitsubishi. I talked to several dealers who sold both dozers, and most said that there are about 4 to 1 of the Komatsu to the Mitbushi. But most said they felt the Mits. were better built, better engine, and eaiser to work on, but harder to get parts. And for the same dollar spent I could get a newer Mit. and in better shape than the Komatsu for the same dollar. So here goes. I just purchased a 1998 BD2J. I bought it sight unseen. It was on E-Bay but did not bring the reserve, so I called the fellow and made a deal. So this Thur. after my doctors appointment. (I think he is going to break the news that I have the big C, well life has to goes on). My wife and I will be heading from Ohio to Okla. City to pick it up. Nothing like having two dozers on hand. I will probably sell the HD4. (unless I dont like the Mitsubishi) Any one who knows any thing about the BD2J. Give me some input. Does any one happen to have a owners, and repair manuel they want to sell or copy and send me or know where I can get one cheap. I am sure I will be back on here asking any one if you know where I can get parts.
 
/ Komatsu D20A-6 ? #54  
John, congratulations on the dozer purchase, and good luck on the Dr. visit. Let us know the outcome of both.
 
/ Komatsu D20A-6 ? #55  
Well I guess I am the owner of a Mitsubishi BD2J, like it or not. My appt. with the doc. was canceled. We left Tues evening about 8pm Okla City. I drove till about 2 am and pulled into a rest area past Terre Hute Ind and slept for a couple of hours. The next day was a long haul across Mo and Okla. We arrived at the destination avout 8PM Wed. evening. After calling the dealer and getting permission to drop my trailer, we found a motel. The next morning after some much needed rest, we drove to the dealer and examined the dozer. I had purchased it sight un seen. (which I will never do again or reccmond). But all in all I guess it was pretty well what I expected. He had several other small dozers for sale and I am sure glad I didnt buy one of them. They sure can look good in pictures on E-Bay but when you see them in person, they are pretty rough. After the paper work, we headed back about 10 AM. Every thing went smooth and it was going to seem like a long boreing trip back home. On the Turner Turnpike about 30 mi east of Tulsa, had a blow out on the trailer. (no problem I thought) I had thrown in a spare tire for the trailer. I was driving a Ford 350 with a mechanics utility box on the back, pulling my skid steer trailer, rated at 14,000 gvw. Some how my jack and lug wrench was not in the truck. So I had to hobble about 5 miles to the next exit and pulled into a U-Hual dealer. He loaned me a jack and lug wrench. (lost about two hours of travel time) Back on the turn pike and about 20 miles up the road, the other tire blew. I knew I was in deep doo -doo then because thease tires are 16.5 and they are almost non existant. I had 3 more good tires on rims back at the shop, plus 2 16" tires on rims which I was wating to change over to. But using it locally I just never got around to it. We had to drive about 15 mi on a flat. The left lane was closed for repaving, so that made it harry driving on the berm avoding all the traffic, finally a man working for the turn pike came along and told me I could move into the left lane and drive there. That relived some of the stress. Finally a Exit. A gas station. Nearest town was about 15 miles away, they let me drop the trailer. Go to the nearest town and fined a tire store. No 16.5 tires. He called a big tire store about 20 mi away. They had only one in stock. I wanted to buy two, one for a spare. He said he would remain open till we got there. After $158. less, I had a tire, went and bought a lug wrench at Auto Zone ( had 4 of them at home) wen back to the trailer, unloaded the dozer and it tipped the trailer up high enough I could change the tire without a jack. Back on the road again (4 hours lost) we drove to Springfield Mo. and got a motel about mid night, next morning, I inspected all the tires and they all looked good. On our way again, about 30 mi from Rolla, bam, the spare I put on yesterday blew. A wrecker operator on the I-44 said the next town exit was about 3 mi. I drove there. unhooked the trailer, and went to the nearest town. I didnt even try to buy a 16.5. I asked where was the nearest salvage yard, went there and bought 2 used wheels and rims off a Ford pu. 16" $158, went back and installed one and back on the road. I wanted to beat the 5 oclock traffic in St. Louis. I have had two Ford 350 and both leave something to be desired in braking ability when loaded. Though I have brakes on all 4 trailer wheels. Its still unerving in traffic trying to make a panic stop when some one pulls in front of you. We made it through St. Louis without incident, on to almost Ohio boarder in Richmond Ind. Pull over at a rest area, sleep two hours, and back on the road again. We got home about about 7:30 AM. My body feels like it has been run over. I am getting too old for this, I keep telling myself. So now, getting the Mitsubish checked over and fixing all the little things, lights, etc. Does any one know the crossover number of the fuel, oil and air filter to a NAPA number or other. Let me know. After getting this one ready I guess I will sell the Allis.
 
/ Komatsu D20A-6 ? #56  
Hi John-

Sounds like you had a rough trip back home. Glad you ended up making it despite your troubles.

Let us know how the Mitsubishi dozer works out. As I had posted earlier and you had replied, the BDJ2 or BDG2 or whatever they are are certainly some that I'm interested in.

Was the dealer you bought from the one that is in Noble, Oklahoma selling dozers on eBay (OT-Tractors I think). Just curious.

Good luck, take care. Thanks for the posting.
 
/ Komatsu D20A-6 ? #57  
Yes. Dozers can sure look on e-bay, but when you seen them in person, thats a differnt story
 
/ Komatsu D20A-6 ?
  • Thread Starter
#58  
Finally got around to installing a rear work light on the dozer.
I purchased a 6" Chrome off road H3 (Halogen) lamp from autozone, It's a 12 volt lamp, the dozer is 24 volt. Next was to find a 24 Volt H3 lamp, which I did find online for just a few bucks.
To mount the lamp, I rummaged around my scrap pile of odd metal pieces, and found a "Z" bracket with a hole already drilled in it, not only that, the hole was already the right size, no cutting, drilling, no machining of any kind, How could this be ?. So all I had to do was attach the lamp to the bracket, hold it up to the dozer to figure out where it best fit. After selecting a suitable location, I scraped off the paint & welded on the bracket. Then primed and painted with matching Komatsu Dozer yellow paint, custom made by the NAPA auto paint store.



Larry
 
/ Komatsu D20A-6 ?
  • Thread Starter
#59  
Here is the bracket with the lamp removed and primed. The center pic shows how well that NAPA paint matches. The final pic on the left is the completed lamp.




There was at one time a rear work light, but when I purchased the dozer it was long gone. The wire was still there, all I had to do was add a ground and a few push connectors to connect the new lamp. The headlight switch on the dozer is a three position, off, headlight, then headlights and rear work light. That switch still works great.
Between the headlights & rear work light, now I can doze 24/7 :D
Larry
 
/ Komatsu D20A-6 ? #60  
Larry,

Your lights look great. I'm gonna have to stop reading your threads, you're giving me too many ideas!!!!!!! If I didn't have to stop working because it was dark out, I would be out there forever. hahaha

Eddie
 

Marketplace Items

2019 FORD F-350 FLATBED (A60736)
2019 FORD F-350...
1998 REINKE TRAILER HEAVY HAUL TRAILER (A58214)
1998 REINKE...
2011 MAGNUM PRODUCTS LIGHT PLANT/TANK TRAILER (A58216)
2011 MAGNUM...
2017 Wacker Neuson LTV6 Towable Light Tower (A56857)
2017 Wacker Neuson...
1009 (A61166)
1009 (A61166)
2012 MACK GRANITE-GU713 (INOPERABLE) (A60736)
2012 MACK...
 
Top