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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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770 diesel in a 1550

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OC4-3D

11-28-2020 11:08:48




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So it turns out my 1550 was born with a gas engine, and one of the previous owners swapped in a 770 diesel. “Pretty close to the same” but it looks like it was done in a hurry.

Hoping you guys will give me some advice regarding the radiator. It looks like it will be easier to fabri-cobble the 770 rad into the 1550 mounting, or better to try making a 1550 rad fit the 770 engine?

At the very least, I’ll need to lower the rad about 7/8” because right now the fan hits the shroud.

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chucksoliver77

11-29-2020 15:48:53




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 Re: 770 diesel in a 1550 in reply to OC4-3D, 11-28-2020 11:08:48  
I think if you put a water pump for 1550 on it your problem will be fixed correctly. I think the pump for a 550 is the same, I measured mine and the shaft is about 1" higher than the one on my 77. The 77-1555 blocks are the same size.



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rustyplow

11-29-2020 06:37:12




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 Re: 770 diesel in a 1550 in reply to OC4-3D, 11-28-2020 11:08:48  
Do some measuring for hood clearance. I put an 880 in a 1550. Ended up using a rad from a 1600 to get it sticking up out of the hood enough.



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SW3

11-28-2020 19:46:06




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 Re: 770 diesel in a 1550 in reply to OC4-3D, 11-28-2020 11:08:48  
I'd re-drill the radiator mounting holes in the sides of the brackets 7/8" lower.



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J.Wondergem

11-28-2020 17:16:11




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 Re: 770 diesel in a 1550 in reply to OC4-3D, 11-28-2020 11:08:48  
Cut out 7/8 inch at almost to the bottom of the radiator bracket, and weld it back together.



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Centerplate

11-28-2020 15:53:04




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 Re: 770 diesel in a 1550 in reply to OC4-3D, 11-28-2020 11:08:48  
I wonder if there is a water pump with the shaft higher up. Talk to Korves Oliver and ask Mark.

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<img src="/cvphotos/cvphoto64868.jpg">[/quote]



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J. Schwiebert

11-28-2020 17:14:33




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 Re: 770 diesel in a 1550 in reply to Centerplate, 11-28-2020 15:53:04  
There are several water pumps for 770's and they do not all have the same center line for the shaft. Does the tractor have a Hydra-power?



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Dieseltech

11-28-2020 14:04:10




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 Re: 770 diesel in a 1550 in reply to OC4-3D, 11-28-2020 11:08:48  
I'd drill the radiator mounting holes lower..



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