Durango 4WD V8-5.9L VIN Z (1998)
Brake Bleeding: Service and Repair
Antilock Brake System Bleeding Procedures
W/ Four Wheel Antilock Brakes
ABS system bleeding requires conventional bleeding methods plus use of the DRB scan tool. The procedure involves performing a base brake bleeding,
followed by use of the scan tool to cycle and bleed the HCU pump and solenoids. A second base brake bleeding procedure is then required to remove
any air remaining in the system.
1. Perform base brake bleeding.
2. Connect scan tool to the Data Link Connector.
3. Select ANTILOCK BRAKES, followed by MISCELLANEOUS, then BLEED BRAKES. Follow the instructions displayed. When scan tool
displays TEST COMPLETE, disconnect scan tool and proceed.
4. Perform base brake bleeding a second time.
5. Top off master cylinder fluid level and verify proper brake operation before moving vehicle.
W/ Rear Wheel Antilock Brakes
GENERAL INFORMATION
RWAL brake bleeding can be performed manually, or with pressure bleeding equipment.
Use Mopar DOT 3 brake fluid, or an equivalent meeting SAE J1703-F and DOT 3 standards, to fill and bleed the brake system.
Bleed only one brake component at a time. Recommended bleed sequence is:
-
master cylinder
-
combination valve
-
rear antilock valve
-
left rear wheel
-
right rear wheel
-
right front wheel
-
left front wheel
MANUAL BLEEDING
Use a bleed hose at each caliper/cylinder bleed screw. Attach one end of the hose to the bleed screw and insert the opposite end in glass container
partially filled with brake fluid. A glass container makes it easier to see air bubbles as they exit the bleed hose. Be sure the end of the bleed hose
remains immersed in fluid. This prevents air from being drawn back into the system.
Do not allow the master cylinder to run out of fluid when bleeding the brakes. An empty cylinder will allow air to be drawn back into the system.
Check fluid level frequently during bleeding operations.
Be sure to tighten each brake line fitting, or bleed screw once bleeding is completed. Loose fittings and bleed screws allows air to enter the system.
PRESSURE BLEEDING
If pressure bleeding equipment will be used, the front brake metering valve will have to be held open to bleed the front brakes. The valve stem is
located in the forward end of the combination valve. The stem must either be pressed inward, or held outward slightly. a spring clip tool or helper
is needed to hold the valve stem in position.
Follow the manufacturers instructions carefully when using pressure equipment. Do not exceed the tank manufacturers pressure recommendations.
Generally, a tank pressure of 15 - 20 psi is sufficient for bleeding.
Fill the bleeder tank with recommended fluid and purge air from the tank lines before bleeding.
Do not pressure bleed without a proper master cylinder adapter. The wrong adapter can lead to leakage, or drawing air back into the system.
