Husqvarna HUV4420, Руководство по обслуживанию

Страница: 55 / 74

HYDRAULIC AND PARK BRAKE SYSTEMS Hydraulic Line Replacement
2005 HUV4420 Gasoline and HUV4420-D Diesel Vehicle Maintenance and Service Manual Page 5-17
5
HYDRAULIC LINE REPLACEMENT
See General Warning, Section 1, Page 1-1.
ý
WARNING
• To perform any of the following procedures, the hydraulic system must be opened. As a
result, the brakes must be bled after the correct reinstallation of the brake components.
Failure to bleed the brakes could result in decreased braking performance due to air being
trapped in the hydraulic system. Use only DOT 5 brake fluid. See Bleeding the Hydraulic
Brake System on page 5-22.
• Prior to servicing hydraulic brakes, thoroughly clean the vehicle, paying particular attention
to areas immediately surrounding hydraulic connections, to prevent dirt or debris from
entering system.
NOTE: The brake lines are provided as assemblies without separating unions other than those at the
wheels and master cylinder.
FRONT BRAKE LINE REMOVAL
1. Chock the rear wheels, and set the park brake.
2. Remove the top screw caps and screws from the dashboard and front body.
3. Remove the front body from the vehicle. See Front Body Removal, Section 4, Page 4-5.
4. Use a flare-nut wrench to remove the front brake line at the master cylinder. See following NOTE.
NOTE: Place a plastic bag around the master cylinder to catch brake fluid before the brake line is
removed. Wrap the bag around the master cylinder to prevent debris from entering the brake line
port.
5. Remove the front brake lines, banjo bolts, and copper washers at each front wheel caliper assembly.
NOTE: Place a pan under each caliper assembly to collect brake fluid.
Place a plastic bag around each caliper to prevent debris from entering the brake line ports. Do not
allow brake fluid to contact the brake pads and disc.
6. Remove the two brake line support brackets and T-bracket from the frame.
7. Slide the front brake lines toward the front of the vehicle, away from the master cylinder.
FRONT BRAKE LINE INSTALLATION
1. Feed the new front brake line under the front of the vehicle and up to the master cylinder.
2. Carefully insert the flared end of the brake line end into the master cylinder, and tighten the hardware to
132 in-lb (15 N·m).
3. Install the T-bracket on the frame, and tighten the hardware to 50 in-lb (5.6 N·m) (Figure 5-19,
Page 5-18) .
4. Install the two support brackets, and tighten the hardware to 50 in-lb (5.6 N·m) (Figure 5-20, Page 5-18) .
5. Secure the hydraulic lines to the frame above the steering column shaft with wire ties.