Hydraulic Control Valves
On disc brake equipped vehicles, metering section of hydraulic control valve must be deactivated before bleeding to permit fluid to flow to front brakes. This is especially important when pressure bleeding.
Use Combination Valve Depressor (J-23709 or J-25856) when applicable. See Fig 1. If tool is not available, hold valve open by hand. DO NOT use "C" clamp or other non-yielding device to hold valve open.