Last summer I purchased a 55 2nd 6500 dump and it finally arrived last fall. Upon receiving I went through the entire brake system, pulled all wheels and replaced master cyl. I bench bled the MC and followed the bleeding process for Hydro vac and wheel cyl. Brakes worked great so I drove it about 2 miles to my brothers building and parked it. This past Sunday was the first time I've had a chance to take it out since last fall and when I got in the brakes went to the floor. I opened the MC and it was empty. I looked under the truck and at each wheel but there was no fluid anywhere. I pulled each wheel and checked for fluid in the drums, there was none. I then pulled the plug in the Hydro vac and there was no fluid there.
I filled the MC back up with fluid and began the bleeding process. I was able to get some brake back but ran out of time to do the job completely. Where could the fluid have gone? Could I still have had enough air in the lines that the fluid in the MC gradually worked its way into those pockets of air?
Thanks in advance for your help.
Brian M
55 6500
59 1/2 ton Napco
59 3/4 ton Napco.
