oil pressure

This forum is about the Fordson Dexta, Super Dexta and Petrol Dexta.
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sky blue
True Blue
Posts: 297
Joined: Sun May 06, 2012 9:20 am
Location: Ireland

oil pressure

Post by sky blue »

have just put an oil pressure guage on tractor instead of light
,now when i run tractor pressure is at 50 but when i drop rev to idle the pressur dropes
down to around about10/15when i rev tractor rev will go up to 50again
, im thinking this is normal could someone confirm this or should it be higher than 15 at idle , there is no blow
on breather tube and nothing coming from dip stick hole hot or cold, im thinking i should have just left oil light on
instead of bloody guage, :cry:

Bensdexta
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Joined: Mon Sep 15, 2008 12:59 pm
Location: N Wales

Re: oil pressure

Post by Bensdexta »

What grade oil are you using?

Consensus on here is that for UK we should be using 30W (and not multigrade).

Have a search on here for oil pressure, particularly for Brian's posts, as he has made quite a study on oils for our old ladies.
Bensdexta - 1961 working for a living!

sky blue
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Posts: 297
Joined: Sun May 06, 2012 9:20 am
Location: Ireland

Re: oil pressure

Post by sky blue »

thanks for the reply bensdexta, im using 30 weight monograde iwas using morriss but
was unable to get it last oil change and used classic car oil 30 w thinking this was the same,
i have tried the oil pressure in search but nothing seem to relate to my problem, ineed to know
after a good work out with engine good and hot at least 3hrs of constant work
[ what is the oil pressure reading at idle] on others tractors
i know with light it will come on at 7p, so this only relates to those using
a gauge with the numbers,

shawnee
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Posts: 49
Joined: Sat Nov 20, 2010 11:44 pm
Location: Georgia

Re: oil pressure

Post by shawnee »

rod bearings, main bearings, oil pump, remember it is a 50 years + tractor, I put a gauge on mine, normally it drops to 40 pounds at idle

sky blue
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Posts: 297
Joined: Sun May 06, 2012 9:20 am
Location: Ireland

Re: oil pressure

Post by sky blue »

thanks shanwnee for your reply ,anyone eles have the same pressure at idle after hard work
would be intersting to know for peace of mind

:

shawnee
Not Quite Blue Yet
Posts: 49
Joined: Sat Nov 20, 2010 11:44 pm
Location: Georgia

Re: oil pressure

Post by shawnee »

I have been using 30w and adding some of lucas oil additive. The operating manual states 40 pounds of oil pressure

sky blue
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Posts: 297
Joined: Sun May 06, 2012 9:20 am
Location: Ireland

Re: oil pressure

Post by sky blue »

what is your tick over set at shawnee i am thinking along the lines
that my tick over rev might be set low or am i clutching at straws.

sky blue
True Blue
Posts: 297
Joined: Sun May 06, 2012 9:20 am
Location: Ireland

Re: oil pressure

Post by sky blue »

just an up date on oil pressure, i changed the oil as bensdexta had had sugested
i had 30w classic for petrol cars, as this was all
i could find in my part of the world in 30w, in her, ihad a 20 liter drum of 15/40 for disel machinery it had caterpillar lable
,[ i know] this had come from an auction in scotland i had got this from a dealer a couple of year ago but never used it
so ithought id give it a go , well little old blue seems to love it the oil pressure is at 50 on startup, after a good hard work out
shes holds at 50 and at idle tick over at 8 shes at 30psi , i have been working her hard for past week or so and she is at the same, hope
this holds like this :clap: ,just googled the cat site the oil if anyone is intersted is caterpillar deo 15/40 / 3E9848 20L DRUM,

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