Brake Proportioning/Combination Valve: Service Precautions

CAUTION:
- Be sure the pressure test fitting being installed into the Hydraulic Control Unit (HCU) has the correct thread sizes for installation into the HCU and installation of the proportioning valve.

- Be sure the pressure test fitting being installed into proportioning valve, has the correct thread sizes for installation into the proportioning valve and installation of brake tube fitting into proportioning valve.