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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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310-New bearings or not

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Formerly PaMike

03-12-2006 07:15:59




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I have my 1755 apart for trans work, so I figured I would drop the oil pan and take a look. It has the old style rod bolts, so I will update them. I pulled a rod bearing and plastigauged it. It shows .0025 clearance,which is the max the manual recommends. I showed the bearing to an experianced IH mechanic. He says it looks fine and he would recommend just puting it back together and running it. I only use the tractor 100 hours a year for mainly loader work. The only thing that conserns me is my oil pressure at Pto speed is only 25 psi.Should I put bearings in or let it go?

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DBoll

03-13-2006 05:19:12




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 Re: 310-New bearings or not in reply to Formerly PaMike, 03-12-2006 07:15:59  
I hate the sound of a detroit and I am not about to listen to on all day!



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tom upton

03-13-2006 20:17:05




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 Re: 310-New bearings or not in reply to DBoll, 03-13-2006 05:19:12  
DBoll: To each his own. I personaly would rather listen to the sweet sound of a detroit than the sound of a 310 going Ka boom!!!
I do agree with you that the Perkins in the 1850 is a great engine , but you cant beat a detroit.



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RAB

03-12-2006 13:12:03




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 Re: 310-New bearings or not in reply to Formerly PaMike, 03-12-2006 07:15:59  
Hi, whoever you are now,
Most important is ovality of crank-pins. You may have that clearance on the tight or loose side!
Can the oil pressure be upped with the pressure relief valve by adjustment or overhaul?
Are the tolerances in the pump correct?
While new bearings may be the ideal situation, if those are put back exactly in their previous positions, then you have changed nothing and if they were perfect, new ones may be no better on an old crank.
Mains are another area to check..... Where do you stop. A pressure oil test might make a mess, but might give you an idea of condition along the crank if you are that worried.
Was the two piece small end bushings not an important update item on that engine?
Your idle oil pressure may be an item for concern, but 25psi is enough for plain bearings with modern oils of the correct grades and ratings.
310 engines came in different ratings and apparently the problems increased as the HP increased - like turboed engines were decidely borderline - at least before the updates.
Regards, RAB

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WFE 2

03-12-2006 11:05:01




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 Re: 310-New bearings or not in reply to Formerly PaMike, 03-12-2006 07:15:59  
Yes, I'd install new bearing shells for what relatively little it will cost. While you're down there, take a micrometer and mike the rod journals to see where they are. Compare them with the size of bearing shells you're installing and make sure your clearances will be acceptable with the installation of the new shells.



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Formerly PaMike

03-12-2006 12:06:50




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 Re: 310-New bearings or not in reply to WFE 2, 03-12-2006 11:05:01  
Good advise, I didnt even think of miking the journals. Thats almost easier than plastigauge. I didnt pull a main cap but I guess I probably ought to slide them in too. Is there any place on the net to buy infectors? One of mine broke on the way out, so I need to pick up one. Thanks



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WFE 2

03-12-2006 17:35:12




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 Re: 310-New bearings or not in reply to Formerly PaMike, 03-12-2006 12:06:50  
Assuming you mean an injector (nozzle), any repuatable diesel shop will have them or have access to them. Make sure you tell them to set it for the correct cracking pressure (they need to know the tractor in which it will be installed) so that way all you have to do is install it when it arrives.



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DBoll

03-12-2006 08:04:14




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 Re: 310-New bearings or not in reply to Formerly PaMike, 03-12-2006 07:15:59  
I ran a 1955 for 17 years doing tillage ect. with less than desirable oil pressure, it ran 25psi hot, I replaced the rod and main brgs, cam bushings, wrist pin bushing and rebuilt the oil pump, the crank had been turned to the max and I couldn't locate a good used one to turn and the mains were on the loose side. After gaining no pressure I dropped the pan, deepened it to get another gallon of oil in it and put tapered shim stock under the mains and got the pressure up to 35 hot. Knowing the 310 isn't built like an IH dsl. I would roll in new inserts even if no copper is showing. The 310 is a nice running engine and economical but not over built. The only Oliver I would own bigger than 80hp would be an 1850dsl.

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tom upton

03-12-2006 19:20:38




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 Re: 310-New bearings or not in reply to DBoll, 03-12-2006 08:04:14  
To DBoll: Just a question about your Last comment. Have you ever operated a 1900 or 1950 GM ?



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Bison

03-12-2006 21:23:10




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 Re: 310-New bearings or not in reply to tom upton, 03-12-2006 19:20:38  
I have a 1855 with a 453 GM in it .
I overhauled the engine right after i bought it.
Spend 2 grand on it in parts. I got 500 hrs on it now. Runs like a charm , cheap on fuel but awfully noisy. Supposed to be 105 hp , but my other 1855 with the 310 in it is way stronger



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