W 250 Pickup L6-359 5.9L DSL (1989)
Hydraulic Brake Booster: Service and Repair
HYDRO-BOOST
1. Pump brake pedal several times to ensure that all pressure is discharged from the accumulator prior to disconnecting hoses from booster.
2. Remove master cylinder attaching nuts and position master cylinder aside.
3. Disconnect and plug all fluid lines from booster ports, then disconnect brake pedal spring.
4. Remove pushrod to pedal attaching bolt.
5. Remove booster attaching nuts, then the booster.
6. Reverse procedure to install.
