Ingersoll Randｮ 7.5 HP 80 Gallon Two Stage Air Compressor

[The Fred]

Wanted to update this thread. Still very cold here and last week I needed the big compressor and it wouldn't start so I grabbed a wrench thinking I could loosen a port so the big machine wouldn't build air until I tightened it.

I looked for a line to loosen and there in front of me sits a safety valve on top of the primary cylinder. I simply held it open and the machine starts great in the cold.

Can't believe I have not tried this for the last 10 years, duh Fred.

And yes Ray I am considering larger wire service to my shop.

Fred

 

[ray66v]

I have never seen a relief valve on a head like that.

The unloader valve should be allowing it to start without any head pressure. ???

At least you have a work around now.

 

[The Fred]

The unloader works fine but all it takes is on compression stroke to build initial pressure on that big cylinder. If I hold the relief open it starts EVERY time with no hesitation. Once the compressor cycles one time it's good for all day if you are using it.

Regards, Fred