If your emergency brake isn't working properly, you likely need to address the following:
* Check the brake shoes: The emergency brake shoes are likely worn or contaminated. This requires removing the rear drum brake assemblies to inspect and replace the shoes if necessary. This is a moderately involved job requiring tools and some mechanical aptitude.
* Check the brake drum: The brake drum itself might be corroded or warped. This would interfere with proper operation of the shoes.
* Check the emergency brake cable: While there isn't an external adjuster, the cable itself could be stretched, frayed, or rusted internally. This is less likely but could contribute to poor braking action. Inspecting the cable often requires partial removal of the brake assembly.
* Check the parking brake mechanism: Rarely, the parking brake lever mechanism itself inside the rear drum could be damaged or broken. This would require professional diagnostics and repair.
In short: You can't simply "adjust" the emergency brake on a 2002 Ford Escape. Poor performance points to mechanical issues within the rear drum brakes. It's highly recommended that you take your vehicle to a qualified mechanic or brake specialist for diagnosis and repair. Attempting to work on brakes without proper knowledge and tools is unsafe and could lead to further damage or injury.