Engine oil pressure

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dbiow
Posts: 77
Joined: Sat Apr 30, 2016 4:20 pm
Location: Isle of Wight

Engine oil pressure

Post by dbiow » Sat Feb 03, 2018 9:00 pm

While splitting logs yesterday (tractor running at 1400 rpm ish in 1000 pto running a saw bench and the external hydraulic service running the splitter at the same time using the free flow return) he engine oil pressure light came on my 885. I’m not sure how long it was on for but we were working like this for a couple hours. The engine has oil, wasn’t hot or knocking at all. My first point of call is to test the pressure before anything else but I am hopeful the
Pressure switch has gone.
Is this the right tester for the thread in the engine block please? Before I order the wrong one.

https://www.ebay.co.uk/itm/Engine-Oil-P ... 0675.m4236

Thanks for the help, I can get my head round imperial measurements but thread sizes I never learnt.
885 q cab and 25d on the Isle of Wight.

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db2d
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Joined: Fri Feb 24, 2012 10:01 pm
Location: Monmouthshire

Re: Engine oil pressure

Post by db2d » Sat Feb 03, 2018 10:49 pm

The thread in the block is 1/8 BSP straight. BSPT is a tapered thread.
The kit does not contain a straight BSP connection and delivery from China can take weeks. Oil pressure gauge kits are obtainable from davidbrownparts.com The kit contains connections, copper tube and gauge. These kits are for replacing the electrical switch with a gauge.
Last edited by db2d on Sat Feb 03, 2018 10:57 pm, edited 1 time in total.

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dbiow
Posts: 77
Joined: Sat Apr 30, 2016 4:20 pm
Location: Isle of Wight

Re: Engine oil pressure

Post by dbiow » Sat Feb 03, 2018 10:55 pm

Cheers for that, I will give Peter a call 👍
885 q cab and 25d on the Isle of Wight.

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cobbadog
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Joined: Tue Oct 11, 2011 6:18 am
Location: beautiful Coopernook NSW. near Taree. NSW. Australia

Re: Engine oil pressure

Post by cobbadog » Sun Feb 04, 2018 5:58 am

Over time I have found that the mechanical gauges (using an oil line and not electrics) are far more reliable. Hopefully it is just a gauge or switch issue rather than the other, bad bearings.

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dbiow
Posts: 77
Joined: Sat Apr 30, 2016 4:20 pm
Location: Isle of Wight

Re: Engine oil pressure

Post by dbiow » Sun Feb 04, 2018 8:12 am

I hope so it’s done just over 4000 hrs and hasn’t had a spanner to it yet apart from servicing, been in the family since it was 4 years old 8)
885 q cab and 25d on the Isle of Wight.

KevinC
Posts: 26
Joined: Sun Dec 03, 2017 3:24 pm
Location: Cambridgeshire

Re: Engine oil pressure

Post by KevinC » Sun Feb 04, 2018 10:16 am

I would definitely advocate changing from electric to mechanical oil pressure gauge. The electrical ones can prove unreliable when they get older especially if you get corrosion on the contacts. The mechanical ones are simpler and they either work or they don't. I changed mine on a 200hp kit car and found it easy, even though I had to hunt around for adaptors and find a place to tap it in. If you can get a kit with everything already there it's a no brainer. I would use some thread sealant on the connections, loctite make one but it's number escapes me at the moment.

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dbiow
Posts: 77
Joined: Sat Apr 30, 2016 4:20 pm
Location: Isle of Wight

Re: Engine oil pressure

Post by dbiow » Sun Feb 25, 2018 9:44 pm

I finally got round to testing the oil pressure today, came back at 45 psi warm and a touch higher when cold.
My workshop book (IT shop Manuel) says a min of 40 psi so I’m happy with that unless someone that knows better can correct me?

Thanks for the help from everyone but I will be changing the switch rather than changing to a mechanical gauge as the rest of the tractor is original and after 4500 (ish) hrs has never had any work apart from servicing from new as far as we know 8)
885 q cab and 25d on the Isle of Wight.

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cobbadog
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Joined: Tue Oct 11, 2011 6:18 am
Location: beautiful Coopernook NSW. near Taree. NSW. Australia

Re: Engine oil pressure

Post by cobbadog » Mon Feb 26, 2018 5:09 am

That is very good news for you. At least you now know for certain that you do have good oil pressure.

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dbiow
Posts: 77
Joined: Sat Apr 30, 2016 4:20 pm
Location: Isle of Wight

Re: Engine oil pressure

Post by dbiow » Mon Feb 26, 2018 8:14 am

Indeed. I am pleased with that, I was fearing the worst :lol:
Will get a new switch ordered today :mrgreen:
885 q cab and 25d on the Isle of Wight.

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