Replacing rear brake shoes and drums is a little more involved than a disc type brake system. However, if you take your time and stick to the directions, you should be fine.
First, here is a link that shows in general how it is done. You can use this as a guide. This video shows the job being done
Here are the directions specific to your vehicle. The pics attached below correlate with the directions.
2008 Ford Focus L4-2.0L
Removal and Replacement
Vehicle Brakes and Traction Control Drum Brake System Brake Shoe Service and Repair Removal and Replacement
REMOVAL AND REPLACEMENT
Removal and Installation
1. Remove the parking brake control boot.
Release the boot clip.
Lift the boot upward and over the parking brake control handle.
2. NOTE: Make sure the rear brakes are cool to the touch.
Move the parking brake control to the fully released position.
3. Relieve the tension on the parking brake cable.
Loosen the adjustment nut.
4. Remove the brake drum.
5. Remove the hold-down clips and pins.
6. NOTE: Do not allow the wheel cylinder pistons to fall out of the wheel cylinder bore.
Disconnect the brake shoes from the wheel cylinder.
Using a suitable tool, hold the wheel cylinder pistons in place.
7. Release the shoes from the backing plate.
8. Disconnect the parking brake cable.
Push the lever inward.
Release the cable from the lever.
9. Remove the lower return spring.
10. Remove the upper return spring.
11. Remove the primary shoe from the strut and brake shoe adjuster.
Pull the shoe outward.
Disconnect the strut and adjuster.
Release the strut and adjuster.
12. NOTE: The strut support spring is under tension.
Remove the secondary shoe from the support.
Move the strut downward.
Disconnect the parking brake return spring.
13. Clean, check and apply silicone grease to the brake shoe contact points on the brake backing plate.
14. NOTE: Make sure that all mating surfaces are free of foreign material.
To install, reverse the removal procedure.
15. NOTE: The internal auto-adjuster must be set and the brake shoes centralized to the brake drum.
Adjust the brake shoes.
16. Adjust the parking brake cable.
I hope this helps. Let me know if you have other questions.
Take care and God Bless,
Images (Click to enlarge)
Monday, March 15th, 2021 AT 7:40 PM