Wrangler 4WD L4-150 2.5L VIN P MFI (1998)
Brake Proportioning/Combination Valve: Service and Repair
Combination Valve Bracket
REMOVAL
Combination Valve Brake Lines
1. Remove brake lines that connect master cylinder to combination valve.
2. Disconnect brake lines that connect combination valve to Hydraulic Control Unit (HCU).
3. Disconnect wire from combination valve switch terminal. Be careful when separating wire connector as lock tabs are easily damaged if not fully
disengaged.
Combination Valve Bracket
4. Remove nuts attaching combination valve bracket to booster studs and valve bracket off booster studs.
INSTALLATION
1. Position valve bracket on booster studs and tighten bracket attaching nuts to 17 Nm (13 ft. lbs.).
2. Align and start brake line fittings in combination valve, master cylinder and HCU by hand to avoid cross threading.
3. Tighten brake line fittings at combination valve to 21 Nm (15 ft. lbs.).
4. Tighten brake line fittings at master cylinder to 15 Nm (11 ft. lbs.).
5. Tighten brake line fittings at HCU to 16 Nm (12 ft. lbs.).
6. Connect wire to differential pressure switch in combination valve.
7. Bleed base brake system.
