HD 6 Gasket

Well got a couple projects going on at same time lol. who doesnt? well working on the allis chalmers hd6 and it needs a head gasket. now the question is where can i get a new top end gasket set? it has the old non turbo buda engine in it. will have to look again but believe engine tag reads hd 6 b 344. any advice to where to find one would be appreciated.

if for some reason norm cant help you can try minnpar

My HD6G was using coolant. As I was cleaning the top of the block to replace the gasket I noticed that one of the sleeves was loose. When I removed it I found it was cracked at the top of the ring travel. It came out in 2 pieces. That was my coolant leak, not the gasket. I put an in frame rebuild kit in it.

KH: From Allis Chalmers Service Manual for HD6 crawler tractor prior to s/n 1332 -

When you park it for the rebuild, think about how you are going to deal with the oil pan. I always put the track on timber at least 4 inch thick.

The 7000 motor is much better than the HD344. Some of the surplus motors were rebuilt before they were sold at auction. The motor fits directly. Some accessories may have to be taken from the HD344. You may have to cut the hood for the new exhaust position. The cast iron exhaust manifold on the 7000 motor is a prize part. It will be less expensive to transplant rather than rebuild.

There were different pistons used to match the various injectors that were used over the years, but gaskets may be universal. Would have to look in my parts books

Books say; Prior to tractor# 13322 (Buda) Head Gasket - 4349764.
For tractors 13322 and up with 6000 engine the old orange books say the gasket is 4349936. The later yellow books say its 4349883. Just a superseding of numbers I think, same gasket. Included for that same gasket are the 7000 turbo engines.
Maybe someone more knowledgeable than me can chime in and say whether the later gaskets can be used on the Budas.
I have not applied the Fiat Allis prefix to the numbers


Edited by Mactractor - 09 Feb 2015 at 7:29pm

I have a 7G that had trans issues, I transplanted and now have the old one to tear into to see if can fix it back up. Seals for shifting oil were completely gone and leaking into the case, probably the biggest issue save smoking the clutch packs.

I had bad luck with the Buda engine company. My information was that they purchased Buda and had no idea what they purchased. I tried for over a year to get a head gasket from them but they never delivered it.
I was able to get the rebuild kit including head gasket from Syracuse Crank & Machine (800) 437 3609 Please post if you have any luck with the Buda engine company

The HD6 motor is a Buda. Allis Chalmers purchased Buda after having a problem with Detroit Diesel. The Buda motors were improved by AC. Replacing an HD344 with an Allis 7000 turbocharged motor is a good idea.
It looks as if the Buda motor company has not improved with time.

guys what they told me was there were minor changes as the head being the biggest change. i was told the head gasket will work for all 3 changes in the motor. and that the bottom end block is same. the difference there in bottom end is the buda has the 5 rings on a piston and the newer motors have a 4 ring piston. and liners/sleeves are the same throughout. they sell a conversion gasket set to put a 6000 series top end on your lower short block. this is some of the stuff Greg at kwik parts explained to me. greg and his wife started the company after Cooks closed there stores when old man cook passed. they took there knowledge and are putting it to use helping all us allis people. another good place to call for knowledge is zimmerman tractor in versailes missouri they part out old allis equipment everyday and rebuild or transplant newer motors in them and can help alot. if kwik parts couldnt have helped me zimmerman were going to be converting to a newer style engine for me. thank you all for your assistance with this hd6 so i can bring it back to life. i may have some minor details to ask like torque questions on bolts and so on. but after this project i will be pulling a hd10 w out of the woods where it has sat for 28 years to try and ressurect it.

thats why i put what he said cause by looking at the motor it sure looks like alot more to change over then what was mentioned. well i must have a late 344 cause my gen is run off belt. anyways i ordered the parts to fix the motor. just going to keep it all the same. and then after the 10 we will see whats wrong with the 7g's tranny. hate to part out good machines when undercarriage is in excellent condition on a machine its hard to tear one down. seems underside is more expensive to get fixed then anything between tracks is. 

Where did you get your engine kit from? I'm having a hard time finding one. Thanks.

DMiller wrote: I have a 7G that had trans issues, I transplanted and now have the old one to tear into to see if can fix it back up. Seals for shifting oil were completely gone and leaking into the case, probably the biggest issue save smoking the clutch packs.

   DMiller, did you ever find a source for the 7G trans seals, the ones in the distribution blocks?