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Removal of Radiator on D4 Dozer

Removal of Radiator on D4 Dozer

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Dozerman51
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Hello All,
What is the proper way to remove the Radiator from a D4/7U Dozer serial#15195 equipped with a Model 44 hydraulic system, surge tank and belly pan. We have removed the hood and surge tank, lower engine panels, bug screen and Hydraulic tank unit guard. It is equipped with dual hook ups at the rear of the seat tank. Two of the hydraulic lines run from the 44 hydraulic unit run under the right plate steel fender through holes on the fender support and then take a 90 degree turn at the back of the seat tank and end up halfway across the back of the seat tank. The lines that run from the front of the diverter valve to the hydraulic tank unit need to be removed right? The problem for us are the two lines that run from the hydraulic tank unit under the fender to the tank. I was thinking that we could disconnect these at the Hydraulic tank unit and rotate them up and out of the way of the radiator. Problem is they run one on top of the other and the holes in the fender support they run through is too small to allow them to rotate. Any advice, help greatly appreciated.👋
Regards,
Joe Giraud
40' D2/3J#4103
41 Dodge WC-12 4x4 Military Pick-up
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Mon, Nov 25, 2013 10:25 AM
Old Magnet
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Seems your problem is having the lines run through and below the plate fenders. Normal routing is on top of the fenders where removal would not be a problem.

Might be enough room with the lines disconnected to slip the radiator sideways for removal.
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Mon, Nov 25, 2013 10:54 PM
Dozerman51
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Reply to Old Magnet:
Seems your problem is having the lines run through and below the plate fenders. Normal routing is on top of the fenders where removal would not be a problem.

Might be enough room with the lines disconnected to slip the radiator sideways for removal.
Hi Pete,
We were thinking the same thing, but what about the oil cooler lines? We can disconnect them at the oil cooler, hopefully there is enough room to get them off the oil cooler. How do you disconnect the hydraulic unit from the crankshaft? Do we have to remove the belly pan to have room to remove the inner lower radiator support bolts? looks like we do. What a PITA!
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Tue, Nov 26, 2013 12:59 AM
Old Magnet
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Reply to Dozerman51:
Hi Pete,
We were thinking the same thing, but what about the oil cooler lines? We can disconnect them at the oil cooler, hopefully there is enough room to get them off the oil cooler. How do you disconnect the hydraulic unit from the crankshaft? Do we have to remove the belly pan to have room to remove the inner lower radiator support bolts? looks like we do. What a PITA!
Oil cooler lines should not be a problem to remove, only takes a small amount of movement to get the fitting uncoupled. The #44 unit just slides off the splined shaft when you move it forward.
Probably will have to remove the belly pan to get decent access to the mounting bolts.

Also most likely will need to disconnect the #44 pump drives shaft from the crankshaft pulley to do the sideways shift of the radiator removal...not normally required if you remove straight forward.
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Tue, Nov 26, 2013 1:22 AM
rjh-md
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Reply to Old Magnet:
Oil cooler lines should not be a problem to remove, only takes a small amount of movement to get the fitting uncoupled. The #44 unit just slides off the splined shaft when you move it forward.
Probably will have to remove the belly pan to get decent access to the mounting bolts.

Also most likely will need to disconnect the #44 pump drives shaft from the crankshaft pulley to do the sideways shift of the radiator removal...not normally required if you remove straight forward.
How about installing a wooden block under the right side under the fuel tank to support it ,and then losen the right side fender bolts to let it drop on the tracks tie the fender against the inside of the track or tilt it out,and slide it forward on the track ?
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Tue, Nov 26, 2013 8:16 AM
Dozerman51
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Reply to rjh-md:
How about installing a wooden block under the right side under the fuel tank to support it ,and then losen the right side fender bolts to let it drop on the tracks tie the fender against the inside of the track or tilt it out,and slide it forward on the track ?
Thanks for all the advice guys.
Old Magnet, Wow, that wil be a real PTIA to remove the drive shaft.:jaw
Tjh-md, we thought about that too. We would have have to disconnect the lines that cross the dash also. Either way we do it, it's a lot more work than we originally planned on. I would guess that Cat improved on the routing of the lines on later model D4 Dozers.
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Tue, Nov 26, 2013 8:34 AM
Rome K/G
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Reply to Dozerman51:
Thanks for all the advice guys.
Old Magnet, Wow, that wil be a real PTIA to remove the drive shaft.:jaw
Tjh-md, we thought about that too. We would have have to disconnect the lines that cross the dash also. Either way we do it, it's a lot more work than we originally planned on. I would guess that Cat improved on the routing of the lines on later model D4 Dozers.
Or you can go to a construction auction and a buy a $20k machine and not worry about that old PITA!!!! lol
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Tue, Nov 26, 2013 9:57 AM
Dozerman51
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Reply to Rome K/G:
Or you can go to a construction auction and a buy a $20k machine and not worry about that old PITA!!!! lol
I think we'll just try and repair the PITA thank you.😆
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Tue, Nov 26, 2013 12:06 PM
Dozerman51
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Reply to Dozerman51:
I think we'll just try and repair the PITA thank you.😆
What about removing the top tank, unbolting the lower tank bolts and lifting the oil cooler and radiator core up and out? Is this possible?
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Thu, Dec 12, 2013 1:32 AM
Rome K/G
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Reply to Dozerman51:
What about removing the top tank, unbolting the lower tank bolts and lifting the oil cooler and radiator core up and out? Is this possible?
Ya you would have to remove the side brackets also pretty tight to work in though.
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Thu, Dec 12, 2013 9:28 AM
8C 361
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Reply to Dozerman51:
What about removing the top tank, unbolting the lower tank bolts and lifting the oil cooler and radiator core up and out? Is this possible?


Unless you have need to remove the bottom tank this is the way to go. I did one that way not long ago.
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Thu, Dec 12, 2013 3:12 PM
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