Brake Line Replacement - Hummer H1 Service Manual

7-14 Brake System

BRAKE LINE REPLACEMENT

Metal brake lines should be inspected for leaks or deterioration
every time the vehicle is being serviced.
WARNING: Batteries must be disconnected when the
brake hydraulic system is being serviced and bled. If the
ABS motor pump runs when air is in the hydraulic sys-
tem, air can get trapped behind the valves in the modu-
lator causing a spongy brake pedal.
NOTE: After servicing the brake system, bleed the brakes and
refill as necessary.
Front Brake Line Replacement
NOTE: The procedure is the same for the right and left front
brake lines.
1. Disconnect the brake line from the caliper.
2. Disconnect the brake line from the the ABS modulator
assembly.
3. Remove the capscrew and clamp securing the brake line to
the crossmember, and remove the brake line (Figure 7-11).
4. Reverse the removal procedure for installation and bleed
the brake hydraulic system.
CROSSMEMBER
Figure 7-11: Front Brake Line Replacement
_____________________________________________________________
CLAMP
Intermediate Brake Line Replacement
NOTE: The procedure is the same for the right and left inter-
mediate brake lines.
1. Disconnect the intermediate brake line from the ABS mod-
ulator assembly.
2. Disconnect the intermediate brake line from the rear brake
line at the union located forward of the forward-rear
crossmember.
3. Remove the capscrews and clamps securing the
intermediate brake line to the frame rail and remove the
brake line from the vehicle.
4. Reverse the removal procedure for installation and bleed
the brake hydraulic system.
Rear Brake Line Replacement
Removal
1. Disconnect the rear brake line from the caliper.
2. Disconnect rear brake line from the intermediate brake
line at the union located forward of the forward-rear
crossmember (Figure 7-12).
Figure 7-12: Rear Brake Line Replacement
3. Remove the capscrew and clamp securing the rear brake
line to the forward-rear crossmember and remove the
brake line from the vehicle.
4. Reverse the removal procedure for installation and bleed
the brake hydraulic system.
REAR
LINE
INTERMEDIATE
LINE
UNION
®