Husqvarna HUV4420, Руководство по обслуживанию

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HYDRAULIC AND PARK BRAKE SYSTEMS Park Brake System
2005 HUV4420 Gasoline and HUV4420-D Diesel Vehicle Maintenance and Service Manual Page 5-23
5
6.3. With the vacuum running, open each of the top brake bleeder valves 1/4 turn on the front wheel cal-
ipers.
6.4. Monitor the fluid as it flows through the tubes of the vacuum bleeder tool. Continue to run the vac-
uum until there are no air bubbles in the lines. 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.
6.5. With the vacuum still running, tighten the two top front brake bleeder valves to 25 in-lb (3 N·m).
6.6. Allow the handle on the brake bleeder tool to open, and turn the vacuum system off.
6.7. Fill the master cylinder reservoir to the MAX level with DOT 5 brake fluid.
7. Tighten the cap on the master cylinder reservoir.
8. Properly dispose of the brake fluid in the vacuum type brake bleeder tool.
9. Inspect the brake system. See Brake System Inspection on page 5-1.
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, Section 5, Page 5-22 .
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.
PARK BRAKE SYSTEM
See General Warning, Section 1, Page 1-1.
PARK BRAKE ADJUSTMENT
NOTE: The hydraulic portion of the brake system has an automatically adjusting brake pad system. The
park brake system does not and requires regular adjustment depending on use.
1. Chock the wheels, release the park brake, and place the Forward/Reverse handle in the NEUTRAL posi-
tion.
2. Loosen, but do not remove the jam nut on the caliper park brake lever.
3. Thread in and finger-tighten the adjustment bolt.
4. Tighten the jam nut on the caliper lever to hold the adjustment bolt in place.
5. Repeat steps 2 through 4 for the opposite park brake assembly.
6. Inspect the brake system to ensure that both the hydraulic brake system and the park brake system are
adjusted and operating correctly before the vehicle is returned to service. See Brake System Inspec-
tion on page 5-1.