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DT436 oil pressure??

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Steven@nd

08-06-2002 19:55:23

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Got a 1460 Axial Flow combine with the DT436 engine in it and am wondering what the spec should be on oil pressure?

I have 40 pounds at full throttle when warmed up. Around 30 pounds at idle fully warmed up. When cold it goes up to 75 pounds.

It had Case IH straight 30 weight oil in it when I checked it, would 15W-40 help the pressure?

Just getting used to working on these big diesels, quite a bit different than my old H! Thanks!

Steven

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Steven@nd - thanks and more info

08-07-2002 19:51:08

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Re: DT436 oil pressure?? in reply to Steven@nd, 08-06-2002 19:55:23

Guess I should have stated that the machine has 2500 hours on it. Not many hours, but combines just never seem to run as long as tractors. We just bought it last year from the guy who had it new. Cenex oil since new changed every 75 hours.

We run CaseIH straight 30 oil. Don't need to worry about shutting fuel off if the engine goes crazy, electric solenoid shuts it off.

Thanks for the replies!

Steven

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kal

08-07-2002 19:37:15

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Re: DT436 oil pressure?? in reply to Steven@nd, 08-06-2002 19:55:23

Had an oil pressure problem on a new 1486 where I worked. IH field rep said 45 lbs was minimum at high idle for a worn out set of bearings.Have had pressure regulator cause low oil pressure to.

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RickB.

08-07-2002 17:43:51

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Re: DT436 oil pressure?? in reply to Steven@nd, 08-06-2002 19:55:23

An underhaul is a good idea. Depending on the vintage of the engine, it may benefit from a larger oil pump and suction tube. 436's have a habit of tossing #3rod out the side, knocking the shutoff linkage off the injection pump. They will sit there and run on 5 till they lock up, or someone has nads enough to get to the fuel shutoff.

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Hugh MacKay

08-07-2002 01:53:34

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Re: DT436 oil pressure?? in reply to Steven@nd, 08-06-2002 19:55:23

It's been awhile Steven, but I am thinking like KB. One thing my 1066 with DT414 did was always carry good oil presure, right to the day it needed a rebuild. Don't remember exactly figures but it was right in there with KB's 966.

If your lucky it could be just pump, if not you know the rest of the story. I don't think I would interupt combining season to check this out. Presures you report arn't that serious. I can't see the 15W-40 oil changing presure over 30W

One of big problems with something like a combine, engine doesn't get enough exercise rest of year. There is the big difference, you could do that with old 4 cylinder gassers. Run them in shed until next season and forget them. I don't think that will work with these big diesels.

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Steven@nd

08-07-2002 06:00:03

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Re: Re: DT436 oil pressure?? in reply to Hugh MacKay, 08-07-2002 01:53:34

Thanks guys, our 1086 has the DT414 and that runs good oil pressure all the time. The old IH mechanic claims that the DT436 and 466 engines never did have as much pressure.

I'm not going to worry about it this year, maybe next year and new oil pump and rods and mains.

Steven

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kev@ia

08-07-2002 08:57:43

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Re: Re: Re: DT436 oil pressure?? in reply to Steven@nd, 08-07-2002 06:00:03

Find a place that anaylizes oil samples, from the metals in the oil they can tell you whats failing.
This has saved us money more than once. Check where you get your oil as they might have a lead.
kev

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Dr. Evil

08-07-2002 10:16:51

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Re: Re: Re: Re: DT436 oil pressure?? in reply to kev@ia, 08-07-2002 08:57:43

Good idea... I run oil analysis on My PowerStroke diesel in My Pickup about every 10,000-12,000 miles. You need the number of hours/miles on the engine, same info on the oil being analyzed, brand & weight of oil and brand & size/model of engine. Test kits include a plastic jar and a lable to mail the sample too... takes maybe a half pint to pint of oil... and let the oil run for a while before You get the sample...Don't take the sample from the first drained oil or the last few drips.... and keep everything squeeky clean! They're testing for single digit parts per million and billion! A spec of rust or dust kills the test! And a couple days after You mail the sample You get the results back. Results will show metals and their amounts, fuel dilution, antifreeze dilution, soot... and a comments section about what is good or bad. ANY heavy duty truck service dealer, or construction equip. dealer should have them... $10-$12 typically.... I'm having FABCO in Green Bay WI., the local CAT dealer do mine. A search on BLACKSTONE LABS should get You another good place to have tests done. I've bought kits from FS Farm co-ops before too.

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K.B.

08-06-2002 20:17:39

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Re: DT436 oil pressure?? in reply to Steven@nd, 08-06-2002 19:55:23

Our 966's D-414 will run 75 pounds at any temp. at half throttle to full throttle on 30 wt., any less than half throttle, it runs about 60-70 pounds.

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