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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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283 diesel Fuel system questions/problems

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tractorman4840

03-19-2006 21:06:46




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I have resently finished putting a 283 Waukesha out of a 1655 into a 1800 C. In the 1655 the fuel was gravity flow. To me it seems like it should have a lift pump in the 1800. It runs now but I have heard that it is bad for the injection pump to have to suck fuel. Also, where do you get pumps for these engines(assuming the cam has a lobe for it). Another thing this engine wet stacks, it runs good but has some blue/white smoke. Seems to have a slight miss at certain lower midrange RPMs, sounds good otherwise. One more thing it leaks at one of the pencil bolts that comes out of the injection pump. I replaced the steel washers but it still leaks, what else is there to cause a leak there? The 283 is suppossed to have only 600 hours on it since rebuild but it did sit for 1.5 years before I installed it in the 1800. Any help would be appreciated. I am ready to wrap this project up. Thanks.

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ejr-IA.

03-20-2006 10:11:46




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 Re: 283 diesel Fuel system questions/problems in reply to tractorman4840, 03-19-2006 21:06:46  
That slight miss you have can be caused by that leaking copper washers on the injection lines on the pump,just like pulling a spark wire on a gas engine.The banjo fitting could have a crack in it also causeing the keak.



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tractorman4840

03-20-2006 17:37:50




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 Re: 283 diesel Fuel system questions/problems in reply to ejr-IA., 03-20-2006 10:11:46  
The leak I am speaking of is on the high pressure line where it comes out of the pump. It leaks at the banjo fitting. Is the dealer the best place to get the lift pump or is there a good after market source. My usual sources have failed me in finding a pump. Thanks for the help.



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J.Schwiebert

03-20-2006 18:16:21




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 Re: 283 diesel Fuel system questions/problems in reply to tractorman4840, 03-20-2006 17:37:50  
Did you replace both gaskets and what did you torque it to? Did you take the short line and inspect the condition of it where it seals?



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tractorman4840

03-20-2006 19:36:38




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 Re: 283 diesel Fuel system questions/problems in reply to J.Schwiebert, 03-20-2006 18:16:21  
I replaced both washer seals, I looked at everything and see nothing that would cause a leak. The fuel seeps out around the washer seals. All the seats where it joins together look good. I did not use a torque wrench but it is tight as can get with a short wrench.



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J. Schwiebert

03-21-2006 16:23:47




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 Re: 283 diesel Fuel system questions/problems in reply to tractorman4840, 03-20-2006 19:36:38  
I read your post and i grinned. I remember those days. You though you had done an A-1 job and then one seaps. They have a definate torque value. I will not be able to look it up untill Thursday so if you need the information call your local fuel shop. You will also need to replace the washers too.



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J. Schwiebert

03-20-2006 04:36:00




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 Re: 283 diesel Fuel system questions/problems in reply to tractorman4840, 03-19-2006 21:06:46  
WFE-2 has explained it. When Oliver first went to the Roosa Master fuel systems from the Bosch a lift pump was not used. It was not too long and it was reinstalled just like on The Bosch. The purpose of the lift pump is to be a charge pump and keep the transfer pump on the Roosa pump full and to make sure fuel is flowing throught the fuel filters.It also cuts down on waer on the vane type transfer pump. Short on time right now so will not explain it in more detail, but I hope you get the picture. Questions?

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WFE 2

03-20-2006 04:23:44




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 Re: 283 diesel Fuel system questions/problems in reply to tractorman4840, 03-19-2006 21:06:46  
The 1655 should have had a lift pump on the right side of the motor, as well as a cam lobe to drive it. There, fuel is then sent to the filters and on to the injection pump on the left side. As to the miss, these short stroke engines won't run as smoothly as your Oliver gassers will at idle. If your idle is set down to 750-800 rpm, there will be some "hunting". They tend to smooth out around 900-1000 rpm. Wet stacking is yet another characteristic of diesels, these in particular; they like to be warm and will run best that way if compression is in order. What do you mean by "pencil bolt" at the pump? The nozzles are commonly called pencil injectors, but where are you seeing the leak at the pump (one of the high pressure lines)? Good luck with the project; the 283 D.I. is a good motor.

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tractorman4840

03-19-2006 21:18:13




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 Re: 283 diesel Fuel system questions/problems in reply to tractorman4840, 03-19-2006 21:06:46  
I forgot to mention that this tractor fires right up with no trouble even when it is in the 30's or so.



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