Volvo Penta MD22P-B Oil Pressure Sender

[nigelmercier]

I have just reorganised my alternator belts, see http://www.ybw.com/forums/showthrea...Belt-Replacement-Layout&p=5278993#post5278993

This has caused a problem with the MD22P-B Oil Pressure Sender, see picture:

I know nothing about these pressure senders, in fact I didn't know I had one: I assumed it was just a switch as I only have an oil warning light, not a gauge.

Am I right in thinking they have to be mounted with the switch at the top; to keep any sediment out?
I think I need a male to female spigot to raise the unit 3cm or so. Any suggestions what the thread size may be, and what jointing compound to use?

 

[scottie]

Use a short hose and remote mount it on the engine elsewhere

 

[rogerthebodger]

I will be doing a similar job next time I am on my boat.

Thread will be 1/8" BSP. and I use a locktite sealer now after having stopped using PTFE tape long age.

The oil pressure sender does not need to be vertical as the sender is connected after the oil filter so should have no crud in the oil to affect the sender.

I am going to use a banjo fitting that allows the fitting to be positioned at any angle to clear other fittings.

 

[RichardS]

You might be able to remove the sender, re-wrap the U-bend with PTFE tape and spin it 90 degrees anticlockwise.

Richard

 

[Heckler]

l

I will be doing a similar job next time I am on my boat.

Thread will be 1/8" BSP. and I use a locktite sealer now after having stopped using PTFE tape long age.

The oil pressure sender does not need to be vertical as the sender is connected after the oil filter so should have no crud in the oil to affect the sender.

I am going to use a banjo fitting that allows the fitting to be positioned at any angle to clear other fittings.

My guess as well, 1/8" bsp
S

 

[nigelmercier]

Thread will be 1/8" BSP. and I use a locktite sealer now after having stopped using PTFE tape long age.
The oil pressure sender does not need to be vertical as the sender is connected after the oil filter so should have no crud in the oil to affect the sender...

You might be able to remove the sender, re-wrap the U-bend with PTFE tape and spin it 90 degrees anticlockwise.

I might give rotation a try, but not with PTFE tape. I wonder which Loctite to use?

 

[nigelmercier]

For info, these are the markings on the sender, the lower ones are around the nut:

Not sure what to make of the "0-10 bar" and the "0.8 ± 0.15 bar"

G Blue
M Black
WK White/Blue

[Later] it seems that G is gauge
WK is Wackelkontakt, or the warning light

 

[rogerthebodger]

For info, these are the markings on the sender, the lower ones are around the nut:

Not sure what to make of the "0-10 bar" and the "0.8 ± 0.15 bar"

G Blue
M Black
WK White/Blue

It looks to be as a combined gauge and pressure switch with a switch point at 0.8 bar +- and to drive a gauge with a range of 0 to 10 bar.

I do have some where a complete spec of the VDO senders but I don't know if its at home (current location) or boat. Will look tonight and if found will post.

VDO info on the net is very bitty so info can be difficult to find.

A quick google came up with this

https://www.merlinmotorsport.co.uk/p/vdo-pressure-sender-10-bar-1-8npt-with-low-warning-360081039003

Spec looks the same but the connections look different.

spec sheet

https://www.merlinmotorsport.co.uk/files/transfer/technical/doc/vdopresssensspec.pdf

 

[nigelmercier]

I do have some where a complete spec of the VDO senders but I don't know if its at home (current location) or boat. Will look tonight and if found will post...

That would be very useful, thanks.

 

[rogerthebodger]

That would be very useful, thanks.

Ok I found a copy of the specs on the web in a pdf that you could down load. It's quite a big doc but you will find the spec and connection details on page 37 ish and the part no is 360081039003

My setup is a sender for twin gauges with a separate switch sender connected on to my engine using a 1/8" bsp tee piece. I also have a mechanical oil pressure gauge mounted on my engine that i used during commissioning to check the 2 electrical gauges powered by the single duel pressure sender.

http://www.airco.com.au/pdf/viewline_marine_catalogue_2010-11.pdf

 

[nigelmercier]

Ok I found a copy of the specs on the web in a pdf that you could down load...

Fantastic, thank you.