Trooper LTD 4WD V6-3.5L (2002)
case, bleed air from the master cylinder in accordance with steps 7 through 17, and then bleed air from the caliper.
19. Place the proper size box end wrench over the bleeder screw.
20. Cover the bleeder screw with a transparent tube, and submerge the free end of the transparent tube in a transparent container containing brake fluid
.
21. Pump the brake pedal slowly three (3) times (once/sec), then hold it depressed.
22. Loosen the bleeder screw until fluid flows through the tube.
23. Retighten the bleeder screw.
24. Release the brake pedal slowly.
25. Repeat steps 21 through 24 until the air is completely removed. It may be necessary to repeat the bleeding procedure 10 or more times for front
wheels and 15 or more times for rear wheels.
26. Go to the next wheel in the sequence after each wheel is bled.
Be sure to monitor reservoir fluid level.
27. Depress the brake pedal to check if you feel "sponginess" after the air has been removed from all wheel cylinders and calipers.
If the pedal feels "spongy", the entire bleeding procedure must be repeated.
28. After the bleeding operation is completed on the each individual wheel, check the level of the brake fluid in the reservoir and replenish up to the
"MAX" level as necessary.
29. Attach the reservoir cap.
If the diaphragm inside the cap is deformed, reform it and install.
30. Stop the engine.
Flushing Brake Hydraulic System
It is recommended that the entire hydraulic system be thoroughly flushed with clean brake fluid whenever new parts are installed in the hydraulic
system. Approximately one quart of fluid is required to flush the hydraulic system.
The system must be flushed if there is any doubt as to the grade of fluid in the system or if fluid has been used when it contains the slightest trace of
mineral oil. All rubber parts that have been subjected to a contaminated fluid must be replaced.
Brake Pipes and Hoses
The hydraulic brake system components are interconnected by special steel piping and flexible hoses. Flexible hoses are used between the frame and
the front calipers, the frame and rear axle case and the rear axle and the rear calipers.
When the hydraulic pipes have been disconnected for any reason, the brake system must be bled after reconnecting the pipe.
Brake Hose Inspection
The brake hose should be inspected at least twice a year. The brake hose assembly should be checked for road hazard, cracks and chafing of the outer
cover, and for leaks and blisters. Inspect for proper routing and mounting of the hose. A brake hose that rubs on suspension components will wear and
eventually fail. A light and mirror may be needed for an adequate inspection. If any of the above conditions are observed on the brake hose, adjust or
replace the hose as necessary.
Caution: Never allow brake components such as calipers to hang from the brake hoses, as damage to the hoses may occur.
