After putting all new cylinders & shoes along with the brake lines it comes time to fill the master so I can vacuum bleed the system.

How do you fill the Master?

Thanks ahead! Bob

It is a 1970 C900 with a single system
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I do not have time to find it right now, but iirc, you have to pour it in from the back, a real pita process.

If you google it, you will find several references to it. You may have to try several wordings to hit it.

I'll check back later and search it out if need be.

 

Found these a while back:

?? Ford C-series Brake fluid ?? - Yesterday's Trucks

70's Ford C Series-where to add brake/clutch fluid?

Post 33, and this looks to be a C series support group of sorts....

https://www.ford-trucks.com/forums/9...-owners-3.html

 

Its the little things that drive ya nuts. Anyways you have to tilt the cab
up and peel the rubber boot up. We fill a squirt oil can with brake fluid
thats the only way for no mess. I have all the master Ford manuals and
no where this is mentioned. Go slow cause there is a baffle cast in there
so it doesnt leak on the drivers foot. (brake & Clutch)

A C900 with juice brakes? *&*+$#?