Farmall Cub

I traded for a '48 cub, that had an oil pressure gauge in the dash. Thought I would put a gauge down on the filter, only to find no hole.
The dash gauge is connected to the pump primer hole. The area where the normal gauge mounts appears to have never been tapped.
Did some cubs come with a dash gauge, or do I have an engine from another purpose [power unit ] or an altered engine.
tractor serial number 47xxx
cottonpicker

What is the engine serial number?

http://www.tmtractor.com/id/id_003.htm

I have 3 power units, and all are tapped on the filter housing, for the pressure gauge. Ed

cottonpicker wrote:I traded for a '48 cub, that had an oil pressure gauge in the dash. Thought I would put a gauge down on the filter, only to find no hole.
The dash gauge is connected to the pump primer hole. The area where the normal gauge mounts appears to have never been tapped.
Did some cubs come with a dash gauge, or do I have an engine from another purpose [power unit ] or an altered engine.
tractor serial number 47xxx
cottonpicker

The oil pressure gauge line connects at the primer passage behind the hydraulic lines?

I would open up the oil filter housing and check from the inside for signs of the original gauge port, I am wondering if it got filled in at some point.