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Another 310 fault

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Scott Green

12-21-2002 04:13:43




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I read all the post about bout the 310 problems.From what I read , vibration and heat are the big factor. I also see the remedys. We have an old time deisel machanic in our area , with a very good reputation(been retired for years). He has also worked on Oliver diesels. He claims the problem with the 310 was in the injector pump. The single cylinder pump didn't give each engine cylinder the same amount of fuel , which I'm assumeing would cause vibration. This diesel machanic claims he had seen a test on the oliver diesel injector pump. The test involved the pump , and six clear cylinder/test tubes. When the pump turned , it shot uneven amounts of fuel into each cylinder. This machanic also claims that other diesel engine companies also agreed with the pump being the problem. I would like to hear what you experts think about this. Have any of you ever seen this test performed? Was the same pump used on other oliver diesels without problems? If so , maybe the 310 simply had enough RPM's to break the camels back. Or , maybe the pump has nothing to do with the 310 problems. I would shure like to see opinions. Thanks , Scott

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Scott Green

12-21-2002 15:56:05




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 Re: another 310 fault in reply to Scott Green, 12-21-2002 04:13:43  
Thanks everyone. I didn't think it was in the pump. But , I wanted to hear it from others with experience. The person telling me what the machanic said , has absolutly "NO" experience with diesel pumps/engines. Yet stands by what the machanic had told him. Of course , he's also a John deere man.



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bob

12-21-2002 09:08:44




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 Re: another 310 fault in reply to Scott Green, 12-21-2002 04:13:43  
The roosa pumps was used on many appilcations. If this is true then more problems with other brands would have showen up. I have not done much with pumps ,but in my opion if you wnated uneven pump out put. You are more then likely to find it in the inline pumps. Due to the fact you have six plungers and the chance of one wearing out faster then the others is greater. In the roosa pump if the plunger weakens the all six will be weaker not one.

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WFE

12-21-2002 07:06:25




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 Re: another 310 fault in reply to Scott Green, 12-21-2002 04:13:43  
Well since I am probably the lone defender of the 310, I'll weigh in but I am certainly no expert. You are correct that heat (which in turn rapidly broke down the 310s inherently small oil capacity) and vibration (primarily from slightly out of balance crankshafts/rod weight differences/old or defective vibration dampners) were two of the usual culprits which took many engines before their time. I have never heard of any widespread problems with the Roosa-Master pump used on the 310s, other than the cup seals which can be finicky at times. I am, however, aware of the test your mechanic was talking about, and it is performed on injection pumps to ensure uniform delivery or to diagnose a problem associated with a weak plunger(s) bypassing fuel which would result in power loss when one or more cylinders receives less than the others at a particular governor setting. I am not sure how one injector plunger could deliver a significantly greater amont of fuel per stroke at a given governor setting, unless the cam was defective in the pump. I would also tend to believe that such a phenomenon might be audible, and the 310s I have been around run quite smoothly. Roosa-Master may have had a problem with a batch of pumps back in the day, but I can only assume they would have repaired or replaced them had they actually been linked to being the primary cause of an engine's failure. Not to doubt the experienced mechanic, but I don't know that it was a significant contributor to the failures commonly associated with the original 310s. There is also the possibility that a faulty injector nozzle through a poor spray pattern was diluting the lubricating oil with diesel fuel. My 1 1/2 cents.

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Dsl

12-21-2002 13:51:09




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 Re: Re: another 310 fault in reply to WFE, 12-21-2002 07:06:25  
Yer not the only one who likes 310's, WFE--I do, too. That dang Shep and his Cummins ... ;-)



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A.P.

12-22-2002 06:12:04




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 Re: Re: Re: another 310 fault in reply to Dsl, 12-21-2002 13:51:09  
Ad my name onto the list of 310 supporters. Ther are a few things I wished they had done differently with the 310 (a counter weighted crank and more room for stroking ;-) ) but over all I think it's an under rated engine. Then again the Cummins looks so nice as a replacement!

Any one want to properly dispose of "dangerous" 310's and parts can always ship us the parts. I guarentee they will be "disposed" of in an enviromentally friendly manner ;-).

A.P.

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WFE

12-21-2002 20:07:25




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 Re: Re: Re: another 310 fault in reply to Dsl, 12-21-2002 13:51:09  
Nice to know I'm not alone. Too bad Shep makes those Cummins conversions look so good! Have a good one guys.



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Shep.. HEY!!!

12-21-2002 14:32:43




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 Re: Re: Re: another 310 fault in reply to Dsl, 12-21-2002 13:51:09  
I resemble that remark :-)



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