Chevrolet Sonic Repair Manual: Brake Drum Diameter Measurement
- Remove brake drum. Refer to Brake Drum Replacement
- Clean the brake shoe lining contact surface of the brake drum (2) with denatured alcohol or an equivalent approved brake cleaner.
- Using a brake drum micrometer (1) calibrated in thousandths-of-an-inch,
measure and record the largest diameter of the brake drum at four or more points,
equally spaced around the drum.
Ensure the measurements are only taken within the brake shoe lining contact area. The micrometer must be positioned the same distance from the outside edge of the drum for each measurement.
- Compare the largest diameter measurement recorded to the brake drum component specifications. Refer to Drum Brake Component Specifications.
- If the largest diameter measurement of the brake drum is less than the maximum allowable inside diameter after refinishing specification; the drum may be refinished, depending upon surface and wear conditions.
- If the largest diameter measurement of the brake drum is equal to or greater than the maximum allowable diameter after refinishing specification; the drum may not be refinished.
- If the largest diameter measurement of the brake drum is equal to or greater than the discard diameter specification; the drum requires replacement.
- Install brake drum. Refer to Brake Drum Replacement.
Warning:
Refer to Brake Dust Warning.
Drum Brakes
...
Brake Drum Refinishing
Special Tools
CH-41013 Rotor Resurfacing Kit
CH-42450-A Wheel Hub Resurfacing Kit
For equivalent regional tools, refer to Special Tools.
Warning: Refer to Brake Dust Warning.
T ...
Other materials:
Rear Brake Hose Replacement (Axle to Caliper)
Removal Procedure
Warning: Refer to Brake Dust Warning.
Warning: Refer to Brake Fluid Irritant Warning.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal
and Install ...
Electrical Power Management Description and Operation
Electrical Power Management
The electrical power management is used to monitor and control the charging
system and alert the driver of possible problems within the charging system.
The electrical power management system makes the most efficient use of the generator
output, improves ...
2-6 Clutch Piston Installation (6T40/45/50)
2-6 Clutch Piston Installation
Callout
Component Name
1
2?E Clutch Piston Assembly
Note:
Position the 2?E piston air bleed and large slot toward the
top of the case.
DT-47796 seal protector ...
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