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Terex 82-40

Russ

Member
Joined
May 20, 2007
Messages
16
Location
Payette Idaho
Hello,
Can anyone tell me if the engine water pump on a 82-40 is different than the water pump that is used in a truck engine application? I mean different as in higher gpm, and able to work against a higher head pressure as the radiator on the 82-40 is behind the operator verses right in front of the engine as in a truck application.
Thank you for your time,
Russ
 

Russ

Member
Joined
May 20, 2007
Messages
16
Location
Payette Idaho
the pump housing itself is different but the kit or guts of the pump is the same

That is what I needed to know. My nephew is working on an 82-40 that has an engine replacement and there is no coolant flow to the radiator. I thought maybe it had the wrong water pump on it. He has pulled the engine oil cooler looking for an obstruction, but it was clean. The radiator (he was told) has been sent to the shop for cleaning, and the coolant pipes had been check for flow prior to the engine being installed.
The thermostats have been removed. So we will have to look further.
How does he tell if the water pump has the correct rotation impeller installed in it?

Thanks,
Russ
 

greeniron

Well-Known Member
Joined
Jun 3, 2007
Messages
85
Location
Australia
Russ , the thermostats need to be installed in the radiator tank or the water flow will bypass the radiator through the bypass pipe which joins the top and bottom pipes together
also you won`t see to much water flow in the radiator because the top tank is split in two i think from memory
sometimes the water pump impeller comes loose because it`s not tight enough on the tapped shaft , you can check this by removing the front cover plate from the pump housing
you say this is a replacement engine , is it a rebuilt or a running s/hand replacement also what happened to the original engine if it need replacing
 

Russ

Member
Joined
May 20, 2007
Messages
16
Location
Payette Idaho
greeniron,
The engine replacement happened 4 years ago, long before my nephew got involved with this dozer. The radiator, he has been told, is out of an Autocar Truck.
The bottom line is that nothing in the cooling system is getting the least bit warm other that the engine block.
 

powerjoke

Senior Member
Joined
Aug 2, 2009
Messages
1,125
Location
Missouri
Occupation
owner/operator/estimator/mechanic/grunt/ditchdigge
Too bad you didn't post a little sooner , I woulda gave you one we scrapped one out last week

Pj
 

greeniron

Well-Known Member
Joined
Jun 3, 2007
Messages
85
Location
Australia
Russ , received PM , put some pic`s up so as to give a clearer picture of what`s been done to the poor girl .
how long dose it take to get the green girl hot/boiling since your nephew been trying to get her going and how long has he run her for ?????
you say warm , how hot is warm by the temp gauge at the motor ??????????
there`s a lot to this story that`s not been told yet that pic`s will tell us
 

Russ

Member
Joined
May 20, 2007
Messages
16
Location
Payette Idaho
The temps were taken using an infrared temp sensing tool. The dozer was started and allowed to warm up to check the temps. I don't believe they moved the tractor. The engine temp was reading in the low 200 F. The radiator was at the ambient air temp of 60 F.
The tractor is on the east coast of the USA and I am in Idaho, a couple of thousand miles away.
 

Meangreen

Active Member
Joined
Dec 15, 2008
Messages
38
Location
South Carolina
The temps were taken using an infrared temp sensing tool. The dozer was started and allowed to warm up to check the temps. I don't believe they moved the tractor. The engine temp was reading in the low 200 F. The radiator was at the ambient air temp of 60 F.
The tractor is on the east coast of the USA and I am in Idaho, a couple of thousand miles away.
I'm on the east coast, where is the dozer located?
 

Russ

Member
Joined
May 20, 2007
Messages
16
Location
Payette Idaho
The dozer is about 2 miles north of Chester Ma.
My nephew has been told the water pump housing(in order to be the correct water pump for a dozer) needs to have both outlet pipes pointed downwards.
Is that correct?
 

Russ

Member
Joined
May 20, 2007
Messages
16
Location
Payette Idaho
The dozer is about 2 miles north of Chester Ma.
My nephew has been told the water pump housing(in order to be the correct water pump for a dozer) needs to have both outlet pipes pointed downwards.
Is that correct?

This post should read "both inlet and outlet pipes"
 

Meangreen

Active Member
Joined
Dec 15, 2008
Messages
38
Location
South Carolina
Here's how it should be.....

Two large pipes enter the bottom of the water pump housing....one from the radiator and the other going to the oil cooler.

Then a large (2"??? dia. but short) 45 degree elbow water pipe out of the top of the oil cooler goes into the side of the engine block. The water pump and oil cooler can go on either side of the engine block. There may or may not be a plate bolted over that water opening to the block on the opposite side of the block away from the pump and cooler. That opening may also have a freeze plug in it. I would pull that 45 degree elbow pipe on top of the oil cooler off and make sure that the freeze plug has been knocked out of the block so water can flow into and thru the block.

Also a small flex pipe (1/4" hose? pipe) out of the top of the water pump into the small end of water manifold on the right side of engine. Another small flex pipe from the side of that head on the right to small end of water manifold pipe on the left side and a short pipe from that head to small end of manifold on the left side.
 
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