Removal & Installation
- Rear wheel lock-up or skidding indicates faulty proportioning valve. See PROPORTIONING VALVE IDENTIFICATION table. Road test vehicle to determine which rear brake system is faulty. Before testing proportioning valve, inspect rear brake lining for contamination.
- Install brake pedal holder, to isolate master cylinder from hydraulic system. Remove brakeline from suspect proportioning valve. See Fig 1. Remove proportioning valve from master cylinder. Install Brake Pressure Adapters (8644 and 8187-2), onto proportioning valve. Install proportioning valve back into master cylinder outlet port.
- Attach a Pressure Gauge (C-4007-A), to each pressure adapter. See Fig 2. Bleed hoses and gauges. Have an assistant depress and hold pressure on brake pedal. Note and record pressure gauge readings. If inlet or outlet pressure readings do not agree with specification, replace proportioning valve. See BRAKE PRESSURE table.
- To install reverse removal procedures. Reinstall brake holder on brake pedal and remove test equipment from vehicle. Bleed affected brake line. See BLEEDING BRAKE SYSTEM .
Courtesy of CHRYSLER CORP.
Courtesy of CHRYSLER CORP. PROPORTIONING VALVE IDENTIFICATION
| Application |
Split/Slope |
Identification |
| Disc/Drum |
| Neon |
| 2000 |
300 psi/.34 |
Black Band |
| 2001 |
300 psi/.34 |
Red Band |
| PT Cruiser |
400 psi/.34 |
Black Band |
| Disc/Disc |
| Neon |
| 2000 |
400 psi/.43 |
Bar Code Band |
| 2001 |
350 psi/.34 |
Purple Band |
BRAKE PRESSURE
| Application |
Inlet Pressure |
Split/Slope |
Rear Brake Outlet Pressure |
| Disc/Drum (Neon) |
| 2000 |
1000 psi |
300 psi/.34 |
550-650 psi |
| 2001 |
1000 psi |
300 psi/.34 |
480-580 psi |
| Disc/Drum |
| PT Cruiser |
1000 psi |
400 psi/.34 |
600-700 psi |
| Disc/Disc (Neon) |
| 2000 |
1000 psi |
400 psi/.43 |
600-700 psi |
| 2001 |
1000 psi |
350 psi/.34 |
525-625 psi |