Section for komatsu d20,21 and similar grey market dozers - Page 51

darinray · 10-31-2009, 11:19 AM

Dang I thought I was waiting for a final list of parts because you said you needed more and was going to email me.

Oh well no sweat. I think you already got the rebuld kit and that is the only thing I was waiting on so I don't need any more info. I've sent your request for the crank out to some manufacturers and am waiting for reply. if I dont' hear back from them it normally means they can't help.

Talk to you again.

Darin

dewy-david · 10-31-2009, 01:28 PM

Hi all, I have a d21s 30180 front loader with normal grouser pads. I'm wonder what year is my machine? Are most wear parts available? My track chains and sprockets a well worn!

I just bought mine and I really like it. I'm doing a bit of clean up on the machine. The seat was all shredded and it was missing a few bits. I'm also making my ROPS. Runs strong and digs well. I need to clean up my pond area and clear brush.

darinray · 10-31-2009, 01:36 PM

Looks like you have a 1973 model. Yes I have those chains and sprockets for you and contact me for other wear parts then I can tell you if they are available or not.

I have most of the wear items here.

Darin

dewy-david · 11-01-2009, 10:52 AM

I'm wondering if I can weld the new sprockets on myself? Is it cast Iron or cast steel? Anyone weld their own?
David

OneWelder · 11-01-2009, 11:06 AM

Dewey- short answer is yes you can - cast steel -used to be a common practice but bolt ons became common place so there was no more real demand

dewy-david · 11-01-2009, 11:53 AM

I see they sell the weld on type on ebay. Is it best to split them in half and then weld them on? Would it be best to preheat them a bit with a torch prior to welding? I wonder which is the best way to cut the old gears off? Maybe with a hand grinder with a cutoff wheel?

Thanks!
David

darinray · 11-01-2009, 01:04 PM

Yeah i hvae both weld on ones one ebay and 1 piece bolt on sprockets on ebay. All you have to do is cut with torch or better yet plasma cutter and then prep...how much depends on your cut and then weld. Leave them together and don't split them it will just make it harder to do. My guy doesn't heat it up but I'm sure it wouldn't hurt.

Darin

OneWelder · 11-01-2009, 01:30 PM

good welding practice is to heat anything thicker than 1/4 " to get rid of moisture which could cause under-bead cracking or pin holing
does not need to be super hot- but you will see water come to surface then evaporate as the temp goes up

jjdow68 · 11-04-2009, 10:06 PM

Hello All
I am loving this forum. I have a D20a-6 I have broken my water pump and fan blade. Does anyone know where and for how much this will set me back to replace? Do they make a rebuild kit even if the shaft is broken? Thankfully it didn't harm the radiator. Look forward to reply. GREYMONAUTS UNIT!!!!!

donmaggi · 11-07-2009, 06:57 AM

Hello All
I have a gray market D20 that runs fine but will not disengage the left track when moving. When the left handle is pulled ( doesnt seem to go through clutch engagement & track release ) track just keeps pulling till the brakes are applied & eventually stalls engine. ANY IDEAS ???

darinray · 11-07-2009, 07:21 AM

Quote:

Originally Posted by jjdow68

Hello All
I am loving this forum. I have a D20a-6 I have broken my water pump and fan blade. Does anyone know where and for how much this will set me back to replace? Do they make a rebuild kit even if the shaft is broken? Thankfully it didn't harm the radiator. Look forward to reply. GREYMONAUTS UNIT!!!!!

Not sure if you fixed yours yet or not but I have teh fan blade for your unit $95 and the water pump you can get rebuilt from Komatsu and if interested I can get you a price Monday on a reman one. I think it's around $350 but not for sure.

Darin

darinray · 11-07-2009, 07:25 AM

Quote:

Originally Posted by donmaggi

Hello All
I have a gray market D20 that runs fine but will not disengage the left track when moving. When the left handle is pulled ( doesnt seem to go through clutch engagement & track release ) track just keeps pulling till the brakes are applied & eventually stalls engine. ANY IDEAS ???

Yeah it sounds like your clutches are frozen together and won't release.... OR you have no oil to your left cylinder for some reason that releases the clutches. I have the steering clutches and steel disc and that is what it probably will end up being when only one side doesn't work. Let me know.

Darin

Frank Dozer · 11-08-2009, 09:48 AM

Hi Dewy-David, I have a D21A-5 and also want to fabricate and install a ROPS. Have you done any preliminary type of design. I have a design in my head based on other D21s with ROPS. Let's put our thoughts on paper and arrive at a good design. After all, our lives might be at stake. Frank

Frank Dozer · 11-08-2009, 09:53 AM

Here's my D21A-5

Quote:

Originally Posted by Frank Dozer

Hi Dewy-David, I have a D21A-5 and also want to fabricate and install a ROPS. Have you done any preliminary type of design. I have a design in my head based on other D21s with ROPS. Let's put our thoughts on paper and arrive at a good design. After all, our lives might be at stake. Frank

oldhousehugger · 11-08-2009, 03:30 PM

FrankDozer,
It would be handy if someone with the measurements could make a picture in WORD of the bolt pattern of the 2 mounting points either side of the console and also at the rear. It would also be handy to have the bolt pattern on the rear of the transmission case where a ripper or other tool could be mounted was known. I have used the paper and pencil method of transfer forever but it would save time if someone has the templates already drawn.
John