Hello all,

I just found your forum and hoping you can help me.

I have a 1977 Yale forklift, model GP-060-SANFBT-086

This is a 6k pneumatic tire gas model. Overall the lift runs and operates great, we use it every day and love it. I've done a fair amount of tune-up work, rebuilt the carb and the steer and mast cylinders.

My only problems the brakes. When I purchased the forklift the brakes didn't work. I dig into it and found that the slave/wheel cylinders on both front brakes were blown out. I replaced them with new from my local dealer, as well as new pads. I the adjusted the new brakes and flushed and bled the whole system. I now have no leaks, and the brakes work...sort of. They will work for the first few stops, but then quickly fade away after that to nothing. I am not loosing fluid, and I don't have any air bubbles in the system (vacuum bled).

When the start the fail the brake pedal doesn't want to return to the up position on its own.

The only thing I can think of is a bad master cylinder. Does anyone have any other thoughts?

If it is the master cylinder, does anyone know where I can get one or what the part number is? I checked at my local dealership (generic dealer, not Yale specific). They think they can order the right one, but it is almost $300 and it will take several weeks. They wouldn't give me the part number.

There are no numbers on the current master cylinder that I can see. It looks just like an older automotive type.

Thought or help?

Thanks,