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Commercial Chassis






REMOVE OR DISCONNECT
1. Two-thirds of the brake fluid from master cylinder.
2. Raise vehicle and support with safety stands.
3. Tire and wheel. On models with composite rotors, reinstall To lug nuts to retain rotor





4. Compress piston using adjustable pliers over inboard lining tab and caliper housing flange. Brake hose from caliper by removing inlet fitting bolt





5. Mounting bolts
6. Bolt boots
7. Caliper.
8. Mounting bolt seals.
9. Bushings. Inspect Mounting bolt and sleeve assemblies for corrosion. Replace if any is found. Do not attempt to polish away corrosion. Bolt boots for nicks, cuts, or corrosion. Replace if any are found. Clean the caliper assembly and install a new brake hardware kit any time it is removed from rotor.

INSTALL OR CONNECT
1. New bushings and bolt seals.
2. Lubricate bushings and mounting bolt seals with lubricant GM P/N 18010909 or equivalent.
3. New bolt boots.
4. Caliper. Fill both housing cavities between bushings with lubricant GM P/N 18010909 or equivalent.
5. Mounting bolt and sleeve assemblies. Tighten Bolt to 51 Nm (38 ft. lbs.).
6. Brake hose to caliper. Tighten Brake hose bolt to 45 Nm (33 ft. lbs.). Measure Clearance between caliper and bracket stops. If necessary, remove caliper and file the ends of bracket to obtain 0.26 to 0.60 mm (0.010 to 0.024 inch) total clearance. (Measure the clearances individually and add them together).
7. Tire and wheel.
8. Safety stands and lower vehicle. Before moving the vehicle, pump the brake pedal several times to make sure it is firm. Do not move the vehicle until a firm pedal is obtained. Check the fluid level in the master cylinder after pumping the brakes.


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