6
Bleeding the Hydraulic Brake System
HYDRAULIC AND PARK BRAKE SYSTEMS
6.1. Lift and support the vehicle and remove the wheels.
See Lifting The Vehicle on page 3-9.
6.2. Start at the brake caliper farthest away from the master cylinder. Attach a clear plastic hose to the caliper’s
bleeder valve and place the other end into a clear container (a clean plastic 16 oz. soda bottle works
fine) filled with enough brake fluid to cover the end of the hose. This prevents air from being drawn into
the caliper during the bleeding process.
6.3. Have an assistant
SLOWLY
depress and release the brake pedal repeatedly until resistance is encountered
when pushing the pedal.
DO NOT VIGOROUSLY PUMP
the brake pedal! Pumping the pedal can aerate
the brake fluid in the master cylinder and brake lines.
6.4. When resistance is felt at the pedal, have the assistant apply gentle downward pressure on the pedal and
hold while slowly opening the bleeder valve, then close the valve fully as the brake pedal reaches the end
of its travel. Continue this process until air bubbles no longer come out of the hose that is submerged into
the fluid in the bottle. Gently tap the caliper and the master cylinder with a plastic-tipped hammer and
repeat the bleeding sequence. This will dislodge air bubbles that tend to accumulate, allowing for a more
complete bleeding process.
6.5. Ensure that no brake fluid gets on the brake rotors or pads. If fluid gets on the brake rotors, they should be
cleaned with brake cleaner. If fluid gets on the pads, they should be replaced as brake fluid can reduce the
brake pad’s effectiveness or even break down the friction material.
6.6. Check the master cylinder fluid level and add fluid if necessary. Always pour fluid into the master cylinder
slowly to avoid creating air bubbles in the reservoir.
See following NOTE.
NOTE:
Do not allow the brake fluid in the master cylinder reservoir to fall below the MIN level mark at any time during
the brake bleeding procedure.
6.7. Once the caliper is bled, tighten the bleeder valve to 25 in-lb (3 N·m), wipe the area of any residual fluid
with a clean rag and have the assistant press on the brake pedal to ensure there are no leaks. Normal
pedal pressure should be used.
6.8. Repeat this process at each brake caliper, starting at the next caliper farthest from the master cylinder.
7.
After bleeding, fill the master cylinder reservoir to the MAX level with DOT 5 brake fluid.
8.
Tighten the cap on the master cylinder reservoir.
9.
Properly label and dispose of the used brake fluid.
10. Inspect the brake system.
See Brake System Inspection on page 6-1.
11. Before a test drive, pump the brake pedal 3 or 4 times. Carefully drive the vehicle and test the function of the
brakes. Check the fluid level to ensure no loss of fluid.
PURGING THE HYDRAULIC SYSTEM
In some cases it may be necessary to completely drain the front, rear, or entire hydraulic brake system of brake fluid.
To completely purge the hydraulic system, perform the following procedure.
1.
Perform steps 2 through 6.5 of Bleeding the Hydraulic Brake System on page 6-24.
2.
Draw 1 qt. (0.9464 L) of the brake fluid into the vacuum-type brake bleeder tool.
3.
With the vacuum running, tighten the two top bleeder valves.
4.
Allow the handle on the brake bleeder tool to open, turning the vacuum system off.
5.
Repeat steps 1 through 4 for the two remaining wheels.
Page 6-26
2008-2012 All-Wheel Drive Maintenance and Service Manual
Summary of Contents for Carryall 295 SE
Page 2: ......
Page 20: ......
Page 28: ......
Page 58: ......
Page 66: ......
Page 100: ......
Page 122: ......
Page 150: ......
Page 157: ......
Page 190: ......
Page 197: ......
Page 236: ......
Page 284: ......
Page 386: ......
Page 394: ......
Page 442: ......
Page 452: ......
Page 454: ......
Page 455: ......
Page 456: ......