Good morning! I've done many searches on this topic but couldn't find my exact issue. Replaced master with OEM master on my 78 FJ40. Also replaced front hoses and calipers. Trying to bench bleed the master while bolted on the rig. The rear reservoir will push/pull fluid as expected, but can't get the front res. to do anything. I opened up the fitting on the side of the master and fluid pours out but doesn't purge any air. Needless to say, I can't get any fluid down to my calipers. Am I missing a step? Thanks!!