Need help identifying this part

[Capehenery]

Based on a review of several TM's I have narrowed this down to whit I think is a "Low Air Pressure unit"
It is on top of my secondary tank. The problem is it does not look like any of the air pressure switches I have found in the threads or on the vendor sites. The truck builds and maintains pressure but leaks at this unit. Is it repairable or what do I need to look for as a replacement.

 

[porkysplace]

It might help to include which model 5 ton your working on .

 

[Capehenery]

Sorry!
1991 M923A2

 

[juanprado]

yes, that is the low air pressure warning switch. That is the newer latest style. The original style was a round can with the connectors already on them similar to the oil pressure switch. I understand they are totally interchangeable.

Both primary and secondary air tanks have low pressure switches wired back to the fail safe module buzzer assembly

 

[Capehenery]

Thank You!
I did find the other style and will try it out.