best oil for six-pots

The place to discuss all matters relating to David Brown Tractors. You will need to register your user name before you can post. If you have already registered could you please make sure that your location details have been completed. Go to My Account in the Main Menu on the left, and then go into "Edit Your Information" and complete your location details. Give the Country (and State/Province if you wish) if outside the U.K. County if within the U.K. Location details helps other members if you need spares, technical advice, or the nearest practical help.

DISCLAIMER -

David Brown Tractor Club Ltd
Forum/website Disclaimer

1. This [forum/website/chat room] and the advice and opinions expressed herein is not a solution for mechanical, electrical, valuations, other problems, breakdowns or issues experienced in relation to the vehicles referenced.

2. If reliance is thought to be placed on any of the information guidance or input provided such information will be expressly confirmed as appropriate to be relied upon.

3. In the absence of any such confirmation no reliance should be suggested or inferred.

4. Members must not disclose information to 3rd parties in anticipation that reliance will be given by non-members.

5. Non-members must not purport to give advice on behalf of David Brown Tractor Club.

6. If you or someone you know is experiencing difficulties or repeated breakdowns you must seek assistance for an appropriately qualified expert who holds themselves out as such.

7. Any comments are free of charge and made or posted on an ex gratia basis. No member or non-member may advertise their professional services

Any user inactive for more than 3 months will automatically be deactivated, please contact admin@dbtc.co.uk if you would like to be reactivated.

Please be aware that your user name and entered location can be seen by all members. We only store information you have entered which is your email address and username, your IP is also stored, we have no access to private passwords.

If you do not agree with your information being stored, please do not register an account, If you wish to unsubscribe at any time please email admin@dbtc.co.uk giving your username.

Amended 27/10/18

Moderators: Segrie61, admin

raymondjtownend
Posts: 478
Joined: Fri Dec 30, 2005 4:47 pm
Location: nr.skipton north yorkshire

best oil for six-pots

Post by raymondjtownend » Tue May 15, 2012 10:10 pm

which is the best engine oil for six potter is it super universal or 20w50 need to change the oil which is or what is the best engine oil -- none turbo 1690

Eric_T
Posts: 1408
Joined: Sat Dec 31, 2005 11:57 am
Location: North Wales

Re: RE: best oil for six-pots

Post by Eric_T » Tue May 15, 2012 10:17 pm

cambs1594 wrote:Im running this one on 15w40 super universal, but no doubt someone will come on here and say its wrong, ive got 40psi on hot tickover, and 60-65psi at full revs :)
What does the book say? What Oil pressure should you get in a 6 Cylinder DB engine?

User avatar
tomwill
Posts: 483
Joined: Fri Jul 23, 2010 8:33 pm
Location: Australia.

RE: Re: RE: best oil for six-pots

Post by tomwill » Wed May 16, 2012 11:49 am

I used Castrol MP plus which is 20w 30, However i have changed to Nulon 15w40 i use that in my 1594, 1412, 885 and Mercedes truck.I am not sure if that oil is available in the UK.The 1690 engine oil pressure i am sure is 50 psi hot at 2000 rpm.Cheers Tom Williams DBTC AUST

User avatar
bigdavesproule
Posts: 314
Joined: Tue Jan 12, 2010 10:49 pm
Location: Castlederg, Co. Tyrone

RE: Re: RE: best oil for six-pots

Post by bigdavesproule » Wed May 16, 2012 12:49 pm

1594 that i tested at nevilles was around 45 - 50 hot at idle if i can remember correctly
dave

Eric_T
Posts: 1408
Joined: Sat Dec 31, 2005 11:57 am
Location: North Wales

Re: RE: Re: RE: best oil for six-pots

Post by Eric_T » Wed May 16, 2012 12:56 pm

bigdavesproule wrote:1594 that i tested at nevilles was around 45 - 50 hot at idle if i can remember correctly
dave
60+psi sounds too high to me... :?

User avatar
richbug
Posts: 1358
Joined: Mon Mar 22, 2010 5:32 pm
Location: Pennsylvania, United States of America

Re: RE: Re: RE: best oil for six-pots

Post by richbug » Wed May 16, 2012 3:12 pm

Eric_T wrote:
60+psi sounds too high to me... :?

Too high is when they burst the oil filter. Some of our real Cases will register 100 plus when cold. Back in the 80s we had one brand of filters blow on start-up.

Never built a 6, but the 4s I have done all register 60+ when rebuilt to the book with a fresh crank, and bearings.

The only 4 here that won't keep 40 hot at idle only has half a thrust bearing, but has been running like that for 25 years(holds 10-12 at hot idle, 40 above 1400rpms).
Users: 780, 1210 Bottle Opener, 1494 4wd open station with 74L, 990, 1394, 1194 High Clearance, another 1394, 1194 LCG, 1290 with 56L, 900, 885 with LS8, 885, 1190

1200, 900 projects, 780,

Parts: 3800, 1200, 1394, 1412, 1490, 770, 885, 990SEL, Red 990I,

User avatar
Madders
Posts: 2433
Joined: Tue Feb 28, 2006 9:52 pm
Location: Holmfirth

6 pot oil

Post by Madders » Wed May 16, 2012 8:15 pm

Heyup Raymond

the book says super uni for 15 and 1690 so go with it chap!
45lb pressur - 3.1 bar if you prefer.

you coming on Sunday??

Mads
[.................................[/size] Image

User avatar
Madders
Posts: 2433
Joined: Tue Feb 28, 2006 9:52 pm
Location: Holmfirth

RE: 6 pot oil

Post by Madders » Wed May 16, 2012 8:19 pm

just says 'at working pressure' in the ops. book
[.................................[/size] Image

User avatar
thomasven
Posts: 261
Joined: Fri May 09, 2008 8:44 pm
Location: Nr. Downham Market. Norfolk.
Contact:

RE: 6 pot oil

Post by thomasven » Wed May 16, 2012 8:42 pm

what sort of speed are you getting out of that tractor with it revving at 2750 as one of my mates is after a 100hp tractor that will do 20-25mph
1 880 selectamatic
1 1200 selectamatic
1 1210
1 25d (seized engine project tractor)

User avatar
6-POT-PHIL
Posts: 1345
Joined: Sat Dec 22, 2007 9:07 pm
Location: Huddersfield, W Yorks. (Home of David Brown Tractors)

Post by 6-POT-PHIL » Wed May 16, 2012 9:04 pm

15w/40 super uni is fine Raymond. Correct oil pressure is 40-45psi at 750rpm hot.

Phil :D
1961 850 Implematic Ex DB test tractor (now sold)
1960 950 Implematic
1970 990 12 speed Selectamatic
1976 996 Loader tractor
1987 'E' 1594 4WD Hydra-Shift
1985 'C' 1694 4WD Hydra-Shift
ImageImage

Six in line sounds mighty fine!!

User avatar
tomwill
Posts: 483
Joined: Fri Jul 23, 2010 8:33 pm
Location: Australia.

Post by tomwill » Thu May 17, 2012 7:17 am

Just looking at the service manual for the 1690, the recommended psi is max 50 at 1800rpm min 40 at 700 min 30.Cheers Tom Williams DBTC AUST

Eric_T
Posts: 1408
Joined: Sat Dec 31, 2005 11:57 am
Location: North Wales

Post by Eric_T » Thu May 17, 2012 8:21 am

tomwill wrote:Just looking at the service manual for the 1690, the recommended psi is max 50 at 1800rpm min 40 at 700 min 30.Cheers Tom Williams DBTC AUST
Hmmmm, if thats the case, 65psi is too high, high oil pressure can be as damaging as low.

Eric_T
Posts: 1408
Joined: Sat Dec 31, 2005 11:57 am
Location: North Wales

Post by Eric_T » Thu May 17, 2012 12:22 pm

cambs1594 wrote:
Hmmmm, if thats the case, 65psi is too high, high oil pressure can be as damaging as low.
Totally disagree with that, all it means is the engine is in good condition internally, dont forget the 60+ reading is at full revs, not 1800rpm, so basically, nothings wrong! High oil pressure will just get exhausted through the relief valve in the pump.or like Richbug said earlier, blow the filter off. I reallly cant see what all the fuss is over :roll:

Anyway, there is no way of decreasing the pressure, seems daft to have the pump dumping half its contents back into the sump. That engine hasnt ever had a spanner on it, 4000hrs just as it left Meltham, so thats how it was supposed to be set obviously
It does not mean that the engine is in good condition at all, it actually means that there is too much pressure in the engine oil system.

According to Tom Williams, the Service Manual says that there should be a maximum pressure of 50psi in the engine oil system.
You are quite correct that the oil will be exhausted through the Relief Valve, but should the valve be set to open at a pressure that’s too high, 65psi for example, the system will see a pressure its undersigned for. Should the tractor blow the filter off, I think that is something to be worries about, and that alone would suggest that the system pressure is too high, which could result in major engine damage.

I would suggest that the Relief Valve is adjustable, and although advised that no adjustment is needed, if you know it is overpressuring the system, I would suggest it would need rectifying through R.V. adjustment.
The pump will ‘dump half its contents back to the sump’ whatever pressure the R.V. is set to open at (providing the pump can create sufficient pressure to achieve the higher pressures)

Should your engine be developing higher pressures, when untouched, I would suggest that either the R.V. was incorrectly set at the factory, there is a fault on the R.V. itself, or there is a partial blockage in an oil gallery somewhere, causing the pressure to rise and the filter by pass to open.

Eric_T
Posts: 1408
Joined: Sat Dec 31, 2005 11:57 am
Location: North Wales

Post by Eric_T » Thu May 17, 2012 12:50 pm

cambs1594 wrote:yes maybe, but if the manual says "max 50 psi at 1800rpm" then by the time then engine speed had increased to 2600-2700rpm, then its going to be higher, it doesnt take much to work that out does it? If the relief valve was set up dodgy in the factory, then its been like it since new, and from how people talk on here, im in a minority having an engine which hasnt been apart. Ive rebuilt a lot of engines, and they all run around the 50-60 psi mark, which is where they should be i think. All i can say is, if it aint broke, dont fix it. Just have to agree to dissagre on this one i think.
Read Tom's post again.

David Brown Specify:

Maximum pressure at flight speed is 50 psi
Minimum pressure at 1800 rpm is 40 psi
Minimum pressure at 700 rpm is 30 psi

Did you check the engine oil pressure as it left the factory? Perhaps there is something that has arrived since that causes problems with the R.V. or is partially blocking an oilway.

User avatar
calvin
Posts: 490
Joined: Sun Apr 04, 2010 10:41 pm
Location: ireland / northern ireland

Post by calvin » Thu May 17, 2012 1:00 pm

my 990 holds between 58-62 psi when cold and drops back to 38-42 when warm with 15-40 shell oil

edit i think barcley williams told us he set the 6 pot oil pump at 55 psi and thats what the 1690 holds
3 pot , 4 pot and the MIGHTY 6 POTT!

Post Reply

Who is online

Users browsing this forum: db2d and 12 guests