IIA MAster Cylinder rebuild problem

[CanuckIIA]

Well I finally got around to sticking my rebuilt CV style master cylinder back into my IIA. I went to bleed the pipes and nothing happened. So I starting sticking my vacuum hand pump on a few junctions that I temporarily took apart to diagnose the issue and still nothing. So I disconnected the fluid outlet pipe from the master cylinder and gave the pedal a pump and nothing happened. Fuild IS definitely getting to the input of the master cylinder. But I don't know if it is getting INTO the MC.

I guess I botched my Master cylinder rebuild.

Does anyone have any advice or experience with this sort of thing? Does it sound like I blocked the inlet or outlet with something? I thought the rebuild went really well and I was looking forward to a victory lap around the block.

[onslow]

Originally Posted by CanuckIIA

Well I finally got around to sticking my rebuilt CV style master cylinder back into my IIA. I went to bleed the pipes and nothing happened. So I starting sticking my vacuum hand pump on a few junctions that I temporarily took apart to diagnose the issue and still nothing. So I disconnected the fluid outlet pipe from the master cylinder and gave the pedal a pump and nothing happened. Fuild IS definitely getting to the input of the master cylinder. But I don't know if it is getting INTO the MC.

I guess I botched my Master cylinder rebuild.

Does anyone have any advice or experience with this sort of thing? Does it sound like I blocked the inlet or outlet with something? I thought the rebuild went really well and I was looking forward to a victory lap around the block.

Some landrover master cyls can only be pressure bled,Ive had a couple over the years with this problem

[TerryS]

I, too, have seen some, where the fluid doesn't get by the check valve on the end of the piston. The vacuum pump occassionally works, but, especially on a newly rebuilt MC, You may have to rig up a cap with an air connection and slowly build up the pressure to force the fluid into the lines. Crack one of the wheel cylinders first. Once you get fluid past the check, you'll be good to go.

[CanuckIIA]

Thanks for the tips. I guess I'll try that trick with the modified bicycle tire tube where you hose clamp it onto the resevoir and pump it with air to pressurize the system.

I'll take pics and let you know how it works.