Hummer H1 Service Manual page 456

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SERVICE BRAKE PEDAL REPLACEMENT
Removal
1. Disconnect the stoplight switch (Figure 7-15).
2. Remove pushnut and disconnect stoplight switch rod (if so
equipped) from brake pedal assembly. Discard pushnut.
(Figure 7-15).
3. Disconnect return spring from brake pedal assembly.
4. Remove cotter pin and washer securing hydro-boost
pushrod to brake pedal bellcrank, and disconnect hydro-
boost pushrod from brake pedal bellcrank. Remove spring
washer. Discard cotter pin and spring washer.
5. Remove nut, two washers, pivot pin, and brake pedal
assembly from bracket.
6. Remove two bushings from brake pedal assembly. Discard
two bushings.
Installation
1. Apply silicone grease to inside of two bushings. Install two
bushings in brake pedal assembly.
2. Install brake pedal assembly on bracket with pivot pin, two
washers, and nut. Using adapter and crowfoot, tighten nut to
60 lb-ft (81 N•m).
3. Install spring washer on brake pedal bellcrank. Connect
hydro-boost pushrod to brake pedal bellcrank with washer
and cotter pin.
4. Connect return spring to brake pedal assembly.
5. Use the pushnut to install the stoplight switch rod (if so
equipped) to brake pedal assembly.
6. Connect the stoplight switch.
7. Operate vehicle and check brakes for proper operation.
8. Check brake lights for proper operation.
PIVOT PIN
STOPLIGHT
SWITCH
BRACKET
BUSHING
STRIKER
BRAKE PEDAL
ASSEMBLY
Figure 7-15: Service Brake Pedal Components
05745159
RETURN SPRING
HYDRO-BOOST
PUSHROD
BRAKE PEDAL
BELLCRANK
SPRING
WASHER
SERVICE BRAKE ROTOR REPLACEMENT
Removal
1. Remove service brake caliper.
2. Remove six capscrews, lockwashers, halfshaft, and rotor
from output flange. Discard lockwashers (Figure 7-17).
Installation
1. Apply thread-locking compound to threads of capscrews.
2. Install rotor on output flange.
3. Secure halfshaft and rotor to output flange with twelve
inclined cam lockwashers and capscrews with preapplied
threadlocker. Tighten capscrews to 57 lb-ft (77 N•m).
4. Install service brake caliper.
HYDRO-
BOOST
REAR BRAKE LINE
FRONT BRAKE LINE
Figure 7-16: Hydro-Boost And Master Cylinder
Mounting
ROTOR
HALFSHAFT
OUTPUT FLANGE
Figure 7-17: Service Brake Rotor
Brake System 7-17
MASTER
CYLINDER