F 250 4WD Super Duty V10-6.8L VIN Z CNG (2003)
Brake Bleeding: Service and Repair
Hydro-Boost Bleeding
GENERAL PROCEDURES
Hydro-Boost Bleeding
1. NOTE: The Hydro-Boost power brake booster is generally self-bleeding, and the following procedure will normally bleed the air from the power
brake booster. Normal operation of the vehicle will further remove any additional trapped air.
Fill the power steering oil reservoir with MERCON Multi-Purpose ATF XT-2-QDX or MERCON equivalent.
2. Remove the powertrain control module (PCM) fuse to prevent the engine from starting.
3. Crank the engine for several seconds.
4. Check the fluid level in the power steering oil reservoir and add if necessary. Install the powertrain control module (PCM) fuse.
5.
Start the engine.
6. With the engine running, turn the steering wheel from stop-to-stop twice. Turn the engine off.
7.
Depress the brake pedal several limes to discharge the accumulator.
8. Repeat Steps 5 and 6.
9. If foaming occurs, stop the engine and allow the foam to dissipate.
10. Repeal Steps 5 and 6 as required, until all the air is removed from the system (when the foaming stops).
