Farm Equipment - D262 Info

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D262 Info

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Category: Allis Chalmers
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=13332
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Topic: D262 Info

Posted By: Jim Allen
Subject: D262 Info
Date Posted: 03 Jun 2010 at 1:18pm

Trying to learn a little about the AC line of the '60s, specifically the D19, but haven't been able to get some technical questions answered for a story I'm working on for Diesel World magazine and I hope maybe some of you can help.

1) When AC bought Buda, they were still using the Lanova cell design. When did that change? As far as I can see, all the D-Series were direct injected. Most of my reference material (which is fairly general in nature) doesn't specify.

2) What was different about the D19's turbo diesel versus the non turbo 262? All I can see on the paper I have handy is a lower compression ratio. No doubt pump calibration and injectors were different? Anything else?

3) Has anyone had a boost gauge on a D19, or know what sort of boost pressure they ran? A local guy told me about 5 psi, which sounds about right, but you tell me?

4) I've been told that it's not hard to crank the D19 up to about 90-100 horses. Would everyone agree with that? Would suspect that might have adverse effects on reliability.

5) Is it true that D19s have been excluded in some pulling classes(currently or n the past) , or bumped up a class, due to being turbocharged?

6) It looks like valve size was reduced at some point on the D262 to reduce cylinder head cracking. Was this done only on the turbo heads or all of them?

Many thanks!

Replies:

Posted By: Sandknob
Date Posted: 03 Jun 2010 at 1:37pm

The only info I know of the questions you asked is #1.

The D series diesels were Lanova cell design until the D21 came out. It is the only D series that was direct injected. The only D series diesels were the D15, D17, D19 and D21 (oh and the ED40 from overseas that was shipped over here). Sorry I could not be of more help.

Adam

Posted By: Charlie175
Date Posted: 03 Jun 2010 at 2:23pm

I have heard many times that D-19's are not allowed to pull because of the Turbo

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Charlie

'48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD

Posted By: Calvin Schmidt
Date Posted: 03 Jun 2010 at 3:58pm

The D series tractors all used the Lavona cell system with the exception of the D-21.

The D-17 Series iv was the last Allis tractor to use the Lavona system.

The D-19 diesel had mainly head gasket problems at the best of times. I'm sure relaibility would go down hill quickly if the pump was turned up. D-19 diesel was the first tractor to have a turbo as standard equipment. D-17's have a 262 non turbo engine.

D-19's all had the same block and head design (not sure about valve size). D-17 series III( I think) and for sure D-17 series iv have the D-19 block and head design with the water pump on the block.

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Nothing is impossible if it is properly financed

Posted By: skipwelte
Date Posted: 03 Jun 2010 at 4:35pm

Bout 4 - 5 lbs turbo boost is all. Pretty much the pistons were diff between late D17 and D19s, there were a lot of small changes in the cyl head-all to make em last longer. Course the pump was a little different, but I think the injectors were the same. Lots of manufactures used that same injector tip. HTH

Posted By: Matt (Jordan,MN)
Date Posted: 03 Jun 2010 at 5:48pm

There is two series of 262 diesels that were in the D19. The first ones or "A" series were about the same engine as the non turbo 262. The later or "B" series had different pistons, camshaft , head, and injectors. They changed the valve and injection pump timming so they would start easier. They also put in smaller injector tips so that there was more iron in the head to reduce heat cracking buy the injector. As for vavle size it might have been changed too. There is a serial number break on exhaust valves.

Posted By: Brian Jasper co. Ia
Date Posted: 03 Jun 2010 at 8:55pm

I can't remember the man's name, but I was talking to someone at The Orange Spectacular in Hutchinson Mn one year and he claimed he had a D19 running 90hp and it was holding together. He did say proper warm up and cool down were paramount to the engine surviving, as was NOT lugging it. I believe he said he melted one set of energy cells in the head.

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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford

Posted By: Jim Allen
Date Posted: 04 Jun 2010 at 7:27am

Interesting! I have read that Lanova cell engines are about the hardest diesels to "tweak." That would be as true for the factory as for an owner some 50 years down the road.

Anyway, it's been interesting to delve into the world of AC tractors a little, which are new to me. There are quite a lot of them around here, though green and red have muddied the orange a bit.

Posted By: jeff n
Date Posted: 04 Jun 2010 at 7:32am

I have one it has over 100hp and i pull 7&9,000# it dose good in the 7 and ok in the 9. The only problem is the head gasket had to replace it 1 time in 2 years.