Yanmar 4jh3-te oil pressure sender part no?

[Irish Rover]

The oil pressure sender on one of my engines seems to be faulty and I'm trying to identify the part number to order a replacement. The sender seems to be a sensor for both the oil pressure alarm and the gauge. I'd be grateful if anyone can help.

 

[ChromeDome]

It is a little strange that the part listed for your engine doesn't look like yours at all.

However, a more generic hit (for VDO and others) is here:
Oil pressure sensor and switch combined 0 - 10 bar - AB Marine service

Specs need to be checked, of course

Edit: OEM no. 126630-91560 Replaced by 119773-91520 should be the one

 

[Irish Rover]

It is a little strange that the part listed for your engine doesn't look like yours at all.

However, a more generic hit (for VDO and others) is here:
Oil pressure sensor and switch combined 0 - 10 bar - AB Marine service

Specs need to be checked, of course

Edit: OEM no. 126630-91560 Replaced by 119773-91520 should be the one

Thanks. The part listed in my parts catalogue 124060-39452 appears to be for the alarm only.
Your link doesn't work for me and the part I found on the AB website is out of stock
Oil pressure sensor and switch combined 0 - 10 bar - AB Marine service
The part no you listed in bold appears to be the job but it's a crazy price. My son in Ireland says he has identified a VDO unit available for around £100 and an after market one for £35. He didn't send the details yet.
My AB link doesn't work either

 

[oldgit]

Pretty sure oil pressure and oil alarm are seperate?
A known problem dealt with on many forums worldwide and apparently a generic problem on all the 4 cylinder oil pressure engine readings at idle.
The general consensus seems to be spent silly money on a new pressure sensor, not the alarm sensor,!
Or replace both gauge and sender with aftermarket stuff........or just ignore the low pressure reading on the guage... it's telling fibs.

 

[ChromeDome]

Pretty sure oil pressure and oil alarm are seperate?
A known problem dealt with on many forums worldwide and apparently a generic problem on all the 4 cylinder oil pressure engine readings at idle.
The general consensus seems to be spent silly money on a new pressure sensor, not the alarm sensor,!
Or replace both gauge and sender with aftermarket stuff........or just ignore the low pressure reading on the guage... it's telling fibs.

It is indeed a combined unit.

AB-Marine service in in the Netherlands - I'd give them a call to see how they can help. They ship everywhere..

AB Marine service
The Klaster 1b
8584 VA Hemelum
The Netherlands
info@ab-marineservice.com

+31514745007

WhatsApp


When searching be aware that both 3rd party compatibles and tractor parts can be less expensive - maybe even for Yanmar tractors.
The specs are crucial - the sensor values has to match the gauge to get a "correct", or at least similar to your other engine, view.

 

[Irish Rover]

Pretty sure oil pressure and oil alarm are seperate?
A known problem dealt with on many forums worldwide and apparently a generic problem on all the 4 cylinder oil pressure engine readings at idle.
The general consensus seems to be spent silly money on a new pressure sensor, not the alarm sensor,!
Or replace both gauge and sender with aftermarket stuff........or just ignore the low pressure reading on the guage... it's telling fibs.

According to the wiring diagram gor my engine the op sender wire is coloured yellow/black and the alarm sender is yellow/white and these are what are connected to the unit which I pictured. That's what leads me to believe it is a combination unit.
The alarm seems to be working fine when the ignition is on. The gauge reading goes beyond 10bar when I start the engine. The gauge is brand new VDO the same as the original.

 

[ChromeDome]

Fig. 21 in the attached:

 

[VicS]

Fig. 21 in the attached:

I think that is a 2wire sender for the pressure gauge , use when the engine has an isolated electrical system .... "floating earth" .. but that may be what the OP wants.
The previous diagram in the parts catalogue shows parts for a non isolated system.
BUT
Google does find a combined gauge sender and alarm switch from several sources.. including ASAP supplies

 

[ChromeDome]

I think that is a 2wire sender for the pressure gauge , use when the engine has an isolated electrical system .... "floating earth" .. but that may be what the OP wants.
The previous diagram in the parts catalogue shows parts for a non isolated system.
BUT
Google does find a combined gauge sender and alarm switch from several sources.. including ASAP supplies

And the OP picture is of a device looking like the suggested