Section for komatsu d20,21 and similar grey market dozers

[darinray]

Originally Posted by K5Cruz

I had a seal blow on one of my blade angle cylinders today, and one of my lift cylinders has a leaking seal. Where is the best place to find the seals and is this something I can do myself without any special tooling? I've never rebuilt any cylinders before, and advice?

I have a source for those.. contact this guy at dmm@inbox.as

[darinray]

Originally Posted by johnmoore

Can anyone please tell me what the bearing number is for a final drive on a
D20P5 is. I have called everywhere and nobody can tell me. Mine is wore off so I can't read them.

What bearing are you talking about? Do you have a part number from Komatsu?

Darin

[darinray]

Originally Posted by Ron

I have a d20 that is leaking hydraulic oil out of the top of the blade control valve (the up / down / tilt) and it's getting to the point it is hard to feed. It looks like an O ring should fix it, but I can't get the rod(?) out of the valve body. Does anyone have any suggestions?

What machine do you have? D20 dash what? There are seals that will need replacing to fix the problem and am not real sure why you can't get the spool out of the valve body. Did you take the bottom cups off and remove these pieces? By rights you don't need to take the spool out of the body to change the lower and upper seals... you just need to remove the linkages on top and disconnect the spring below.

Darin

[Ron]

Originally Posted by darinray

What machine do you have? D20 dash what? There are seals that will need replacing to fix the problem and am not real sure why you can't get the spool out of the valve body. Did you take the bottom cups off and remove these pieces? By rights you don't need to take the spool out of the body to change the lower and upper seals... you just need to remove the linkages on top and disconnect the spring below.

Darin

It is a d20-6. I've taken the linkage and a cap type thing loose from the top. I haven't taken anything off of the bottom. What is the spool? Is that the piece that connects to the lever? How to get the spring out?

[johnmoore]

Originally Posted by darinray

What bearing are you talking about? Do you have a part number from Komatsu?

Darin

The one right behind the sprocket. The part number one place gave me is 06030-22215. I assume this is the part number, I told them I couldn't read mine off of the part and I don't have a manual to it. The bearing company I called said they could cross refference if I could get the number off the bearing.

[darinray]

Originally Posted by Ron

It is a d20-6. I've taken the linkage and a cap type thing loose from the top. I haven't taken anything off of the bottom. What is the spool? Is that the piece that connects to the lever? How to get the spring out?

The spool is the piece that goes through the valve body regulating the flow to the appropriate circuit. You need to IF changing the bottom seals remove the bottom cap and then remove the bolt holding the spring to the spool. Feel free to contact me and I can walk you through the process and get you the copy of teh parts book and or service manual.

Darin

[darinray]

Originally Posted by johnmoore

The one right behind the sprocket. The part number one place gave me is 06030-22215. I assume this is the part number, I told them I couldn't read mine off of the part and I don't have a manual to it. The bearing company I called said they could cross refference if I could get the number off the bearing.

Oh I see. Yeah that one is expensive but I guess what isn't. Sorry to say I don't have the number off that one. With the cost of these final drives and you want to be sure you get teh exact replacement brg sometimes is easiest to just order it from the dealer (Komatsu). If you find out a replacement one do share here. Good luck

Darin

[Ron]

Thanks Darin. You're great to help like you do!

[Danny B]

K5Cruz
I saw you are in OK. If you are closer to Tulsa than Dallas, I would recommend Crown Products in Tulsa. My brother in law works for Cat in Tulsa, he told me about them a couple of years ago. We have saved a chunk of money with these guys. Fixed a cylinder for a John Deere baler about a week ago for $5.35.

As the other guys, you have to disassemble and clean up the parts. They will measure and find parts, and will usually put parts on cylinder for you.

I have only had one they could not fix. Odd parts on Ford tractor.