6
Bleeding the Hydraulic Brake System
HYDRAULIC BRAKE AND PARK BRAKE
SYSTEMS
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 6-18.
2.
Draw 1 qt. (0.95 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 6-20
2016 Carryall 1500/1700 and XRT 1550 Maintenance and Service Manual
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