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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Super 88 D

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Chris in Mo.

03-19-2007 19:55:33




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I have a super 88 diesel that wont start without a sniff of ether,evenafter it is warmed up.Starter is freshly rebuilt and cranking speed seems good. Thanks.




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rrlund

03-21-2007 06:30:17




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 Re: Super 88 D in reply to Chris in Mo., 03-19-2007 19:55:33  
I suggested this on Larry Harsins site. He said I was right,it was probably the primary pump. Another thing that I've noticed when they go bad is that if you are going down the road and throttle back to pull in to a driveway or something,they will have a slight sputter and lope.



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J Schwiebert

03-21-2007 07:01:36




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 Re: Super 88 D in reply to rrlund, 03-21-2007 06:30:17  
There are also 2 little check valves in that pump. When the little springs that hold them on there seat break, they will act that way. You can also pressure check the low side. Also listen to see if you can here the plunger in the Bosch pump squeck as you try to start it. J.



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AB

03-20-2007 19:55:10




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 Re: Super 88 D in reply to Chris in Mo., 03-19-2007 19:55:33  
I have the same problem on one of my 88's. I've learned to live with it for now. Just a sniff of either and she'll start. The engine dynos good, no blow by, no smoke, lift pump has a new kit, good compression.. Just can't make my self buy a rebuilt injector pump for the little bit that I use the tractor. I'm also not convinced that the head isn't the problem also. Dad says they weren't the easiest to start even when fairly new.

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rrlund

03-20-2007 08:04:57




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 Re: Super 88 D in reply to Chris in Mo., 03-19-2007 19:55:33  
I think you asked this on Larrys site too didn't you? I've had this problem in the past too and it was the primary fuel pump. It wasn't pushing the fuel through the filters and pushing the fuel in to the injector pump. I assume the injector pump was starving for fuel or trying to pull the fuel.Anyway,rebuilt primary pump solved the problem.



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Tramway Guy

03-20-2007 05:37:35




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 Re: Super 88 D in reply to Chris in Mo., 03-19-2007 19:55:33  
Do you get any smoke when you try to start it? If not, it is probably the hydraulic head in the injection pump.



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dad's88

03-19-2007 22:35:18




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 Re: Super 88 D in reply to Chris in Mo., 03-19-2007 19:55:33  
If intake valve recession is too low they will start hard. For some reason rebuild shops have wrong spec on this. They show something like .035-.050. I showed them factory shop manual, it's .005-.015 (I think), and made them do it over. I know this condition can make them hard to start. Could also be worn hyd head on inj pump or other fuel system problems, bad rings, valves etc. ie: low compression.

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