The drum brake system consists of the following:
Applies mechanical output force, from hydraulic brake wheel cylinders, to friction surfaces of brake drums.
Uses mechanical output force applied to friction surface from drum brake shoes to slow speed of tire and wheel assembly rotation.
Secures drum brake shoes firmly in proper relationship to hydraulic brake wheel cylinders. Enables sliding motion of brake shoes needed to expand toward friction surface of drums when mechanical output force is applied. Provides return of brake shoes when mechanical output force is relieved.
Provides automatic adjustments of brake shoes to brake drum friction surface whenever brake apply occurs.
Mechanical output force is applied from the hydraulic brake wheel cylinder pistons to the top of the drum brake shoes. The output force is then distributed between the primary and secondary brake shoes as the shoes expand toward the friction surface of the brake drums. The brake shoes apply the output force to the friction surface of the brake drums, which slows the rotation of the tire and wheel assemblies. The proper friction of both the drum brake hardware and adjusting hardware is essential to the proper distribution of braking force.
SIR Disabling and Enabling
SIR component location affects how a vehicle should be serviced. There are parts
of the SIR system installed in various locations around a vehicle. To find the location
of the SIR components refer to Supplemental Inflatable Restraint System Description
and Operation.
There are several reason ...
Air Conditioning Refrigerant Service Valve Core Replacement
Special Tools
GE-39400-A Halogen Leak Detector
GE-46246 Valve Core Removal Tool
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
Remove the service port valve cor ...
Heater Inlet Hose Replacement (LUV)
Heater Inlet Hose Replacement
Callout
Component Name
Preliminary Procedures
Drain the engine coolant. Refer to Cooling System Draining and Filling.
Remove the charge air cooler outlet hose. Refer to Charge Air Cooler
...