Terex crawler mechanics in here please

Hi, Russ.
Your post said "32-40". I suspect that it may be an 82-40, which I thought had the 8V-71 donk in them. Then again, it may have had a re-power somewhere along the way. I can't tell you about whether or not the water pump would be right or wrong but your comment that it no longer has the original radiator has me wondering. The old Autocar rad. would have been designed to do its work with a pretty stiff head wind helping the fan to get air through it. The "Terrible-X" does not have the stiff head wind and so that radiator may not have enough cooling capacity for that application.

Beyond that, check all your water lines for blockages and check that the rad. is clear inside and free of dirt, dust, leaves, etc., in the fins.

Funny thing about those old Euclid and "Terrible-X" crawlers - I can't remember EVER hearing that somebody managed to spear a radiator while clearing with one.

BTW, DON'T ever run it out of fuel. There might be a 'life lesson' in there if you do. (????????????????????)

Just mt 0.02.

I would say that it's your radiator. Does it have a shroud around fan to make sure all the air goes through the radiator?

I owned and ran several TEREX dozers and over heating was never a problem.

Long story but I'll try to keep it short. I bought a nice 82-20B(one of those as is, where is deals) from the TEREX dealer that would overheat when run hard. I found out from the mechanics it had been shipped from Oklahoma east to be sold because they didn't think we had as hot of weather as Oklahoma. We cleaned the radiator until you could eat off of it and it still ran hot. My man was taking things off to remove the radiator when I noticed the fan blade was on backwards. Turned the blade around and it never ran hot again....that tractor was a steal.

Stand behind the dozer, rev engine full blast, if it doesn't blow the hat off your head, you have a problem of not enough air through the radiator. Check your belts and pulleys for slippage and if it doesn't have a reversible fan, make sure the curve of the fan blade is turned the right direction. It should not run hot.

I should have mentioned this, I know better.
Nothing but the engine is getting warm. Not the radiator, nor the cooling lines to or from the radiator. That is why we suspect no circulation. Supposedly, the cooling lines were flushed, checked for flow and the radiator was sent to the shop to be cleaned and checked out before the engine was installed.
My nephew pulled the oil cooler yesterday to check for obstructions, as that is the first thing to see the water from the water pump, and it is clean. Today he will check to make sure that the water pump impeller is not slipping on the pump shaft. The thermostats have been removed.
Also you folks were right, it is an 82-40.
My nephew is the 4th tech to try to figure this problem out. So it is quite the guessing game to try and figure out what has or has not been done in the past.
Thanks for your time,
Russ

[quote="Russ"]I should have mentioned this, I know better.
Nothing but the engine is getting warm. Not the radiator, nor the cooling lines to or from the radiator. That is why we suspect no circulation. Supposedly, the cooling lines were flushed, checked for flow and the radiator was sent to the shop to be cleaned and checked out before the engine was installed.
My nephew pulled the oil cooler yesterday to check for obstructions, as that is the first thing to see the water from the water pump, and it is clean. Today he will check to make sure that the water pump impeller is not slipping on the pump shaft. The thermostats have been removed.
Also you folks were right, it is an 82-40.
My nephew is the 4th tech to try to figure this problem out. So it is quite the guessing game to try and figure out what has or has not been done in the past.
Thanks for your time,
Russ[/quote]
Hhmmmm.....let me tell you a little story about a DETROIT overheating.

Went to an auction back in the late 70's. Just went for entertainment because to be honest, I was broke as a convict and could hardly afford a hotdog. They sold a very low hour CLARK scraper for $8,000 with a 6V71 in it that rubber and machine looked like new. Myself and another contractor friend both commented that we should have gotten a number and bought that machine. But as we talked others began to tell us about the scraper. Seemed everyone there but us and the new owner knew the history of the machine.

Well, a couple of weeks later I was at a mechanics shop that did some work on my old CATs for me. He hated any other equipment that wasn't CAT but a good customer of his had bought the CLARK scraper. It had been to the dealer twice and an independent mechanic once in it's very short lifetime for a cracked head on the right side of the engine. The old gentleman that did some work for me on my CATs had found the problem. The heads did not have the usual water manifold pipes on the heads that DETROITs in heavy equipment usually have. It was set up more like a 6V71 found in some trucks. There were large "freeze" plugs on each end of each head that allowed for plumbing to be bolted on either end or for use on other DETROIT engine sizes and configurations.......it had most likely come from the factory with the "freeze" plug "NOT" removed and each time the head had been replaced the mechanics had failed to remove that "freeze" plug and therefore no water circulated on that side.....The old CAT mechanic put a head on the right side after knocking out the freeze plug and it never gave any more problems......his customer had stolen himself an almost new scraper.

NOW, you stated you had just put an engine in the dozer. Look at your 8V71, if it doesn't have a water manifold serving 4 cylinders on each side, it's configured probably for a truck and may run hot. The heads will be made in two ways. One way, they will have little plates bolted over the hole where a water manifold pipe would normally bolt and it should have these on the 8V71 in and 82-40 dozer. If it has these plates in place then you need to remove them and get the water manifold pipes and plumb the engine accordingly......but some heads were molded solid at these points and did not have the plates bolted over the holes. This type head was usually found in trucks and you cannot put a water manifold on that type head.....you need the proper heads and plumbing.

old 3t
Thanks for the reply. I will send this info onto my nephew.

[quote="Russ"]old 3t
Thanks for the reply. I will send this info onto my nephew.[/quote]

OK, I'm back. Had to drive a few miles to look at how the last 82-40 I owned was plumbed.

Sitting in the drivers seat, the large end of the water manifold pipes should be pointed toward the rear. The 2 pipes, one from each side, should be going into a large can or canister found on the left side of dozer. If the canister can be taken apart, then it may have a water filter in it that needs checking, if not, don't worry about it. Hot water flows out of the bottom of the canister into a large metal pipe that runs to the left side of the transmission and into the transmission oil cooler. Check this cooler but I never had one to fail or stop up. From the top of the transmission cooler another metal pipe goes to the top of the radiator. I would take that pipe loose from the radiator and crank the engine up for a few seconds to make sure I had good flow at that point. With the thermostats out you should have one heck of a good flow. The water pumps are small on a DETROIT but they pump a lot of water.

The cooler water flows out the bottom of the radiator on the right hand side and to the front of the engine into the engine oil cooler and water pump.

DETROITs will run right hand or left hand rotation. I know for a fact that the fuel supply pumps had to be for the right rotation(left or right hand rotation) or they wouldn't run right. Bought a little EUCLID S-7 once and that was the problem with it. It would pump fuel but not enough to hold proper pressure on the injectors. I can't remember if the water pumps also had to be for right or left rotation engines so you might should check with someone that knows about that. If there are different water pumps for different rotations and you have the wrong rotation water pump on the machine, it may pump some water but not enough to do the job.

I gave this latest info to my nephew and he will check the water filter and trans oil cooler. And also check for water flow at the radiator and the rotation of the water pump.
Thank you for all your trouble to go and look at your tractor for us.
I will keep you informed of his progress.
Russ

Put a 3408 in it and be done! lol

You say the thermostats have been taken out? Are they the type which close the by-pass line when they open? like many other diesel engines are., Its a long way to the radiator on the Terex, perhaps the water is taking the easiest route which is round the by-pass?