87 klf 300a no brake handle pressure. I've replaced the master cylinder, vacuum bled both sides and am getting clear fluid out with no air bubbles. There are no signs of fluid leaking anywhere, but still cannot get handle pressure. I pulled the hubs to check the shoes and cylinders and all looks normal. This system was dry when i bought the machine, but dont know for how long. Any suggestions to where I should look next?? I'm baffled.