Volvo penta oil pressure senders

[snowbird30ds]

I looked at my oil pressure senders at the weekend as I need to change the range to match my new gauges (gone for 5 bar instead of 10 bar) but they look a right bugger to get at without taking bits off the engine, will the construction of the volvo senders allow me to undo by gripping the body or will they fall apart on me?
I recon I could make a tool to go over and grip easy enough and once out use a extension adaptor on the replacements but don't want to trash originals.
Engines are TMD41's.
Any useful hints and tips greatly appreciated.

 

[colhel]

I took this picture when I was replacing my alternator. Is that the sender? My engine us tamd41a

 

[scottie]

watch Out if you have dual station gauges as they are likely to be in series

 

[snowbird30ds]

That's the beast in the piccie, I only have single station setup, I have recently rebuilt the dash with new gauges and went for 5 bar oil pressure gauges as my engines will only ever produce that at the very most so 10 bar gauges leaves it in the bottom of the scale all the time.
I'm just trying to find the easiest way to change the senders to match, I can get the senders easily enough it's just the access for what should be a simple job.
There's groves in the body so I recon a tube with a grub screw tapped in would slide over and make it easy to turn but not sure if the sender will undo or fall apart as I don't know the construction.
Even knowing the size of the flats at the engine end would probably be helpful as maybe I could make a tool to get around the body of the sender.

 

[QBhoy]

Just mind that there is a sender for the gauge oil pressure and also a pressure switch sender for the alarm too. On the tamd61 at least…they are next to each other almost. Likely the same on your 41’s. Can’t quite remember. Just in case you pull the wrong one.

 

[snowbird30ds]

They are quite obvious in the difference, the low pressure switch is much smaller.
But thanks for the warning.

 

[QBhoy]

They are quite obvious in the difference, the low pressure switch is much smaller.
But thanks for the warning.

No worries. Just in case. All the best !