Rear drum brake assembly

Tiny
THUDDRIVER01
  • MEMBER
  • 2000 TOYOTA ECHO
  • 1.5L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
With new slave cylinders and brake shoes the new drum won't fit over the brake shoes. Even the worn old brake drums won't fit over the new shoes. I put the old slave cylinders back on and still have the same problem. I have the brake adjustment lever completely released so there is no expansion of the brake shoes. I have opened the bleed valve so there is no pressure against the shoes. I reassembled the brake shoes one by one so I'm fairly certain all the hardware is on correctly. I have double checked the part numbers with AutoZone and have the right shoes, slave cylinders and drums. I tried the new drums over the old brake shoes before I replaced them and they fit fine. I have pretty well decided the brake shoes are too thick. What say you?
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Wednesday, December 19th, 2018 AT 2:33 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi and thanks for using 2CarPros.

From past experience, I have found that their top of the line brakes can sometimes be exactly what you described, too thick. What I suggest is to read through these directions and the link and confirm the shoes are properly installed as well as adjusted the entire way down to the smallest diameter they can be. If the drum still doesn't fit, remove the shoes and compare them to the design and size of the old ones. If the backing plate is the same size and design, return the shoes and request new ones. Again, I have experienced this, but never with the mid to lower grade parts.

_________________________________

https://www.2carpros.com/articles/how-to-replace-rear-brake-shoes-and-drums

________________________________
Also, make sure the parking brake is totally off. It may need adjusted down. Make sure it is properly installed and not sticking. Here are the directions specific to your vehicle for removal and install. Make sure you didn't miss anything. All attached pictures correlate with these directions.
_______________________________

PROCEDURES

REMOVAL

1. INSPECT SHOE LINING THICKNESS
Remove the inspection hole plug, and check the shoe lining thickness through the hole.
If less than minimum, replace the shoes.
Minimum thickness: 1.0 mm (0.039 inch)
2. REMOVE REAR WHEEL
3. RELEASE PARKING BRAKE LEVER
4. REMOVE BRAKE DRUM

HINT: If the brake drum cannot be removed easily, do the following steps.

a. Remove the inspection hole plug and insert a screwdriver through the hole in the backing plate.

b. Place the end of a screw driver against the surface of the adjusting latch, and move it in the direction "A".
5. REMOVE FRONT SHOE
a. Remove the front shoe.

1. Using SST, remove the 2 return springs and anchor spring.
SST 09703-30010
2. Using SST, remove the cup, shoe hold-down spring and pin.
SST 09718-00010
3. Remove the front shoe and strut.
4. Remove the 2 C-washers.
5. Remove the automatic adjusting lever, automatic adjusting lever spring and automatic adjusting latch.
6. REMOVE REAR SHOE
a. Using SST, remove the cup, shoe hold-down spring and pin.
SST 09710-00010

b. Using needle-nose pliers, disconnect the parking brake cable from the parking brake lever, and remove the rear shoe.
7. REMOVE PARKING BRAKE LEVER
a. Remove the C-washer.
b. Remove the parking lever from rear shoe.

8. REMOVE WHEEL CYLINDER
a. Using SST, disconnect the brake line. Use a container to catch the brake fluid.
SST 09751-36011
Torque: 15 Nm (155 kgf-cm, 11 ft. lbs.)
b. Remove the bolt and the wheel cylinder.
Torque: 10 Nm (100 kgf-cm, 7 ft. lbs.)

9. DISASSEMBLE WHEEL CYLINDER
a. Remove the 2 boots from the wheel cylinder.
b. Remove the 2 pistons from the wheel cylinder.
c. Remove the spring from the wheel cylinder.
d. Remove the 2 piston cups from each piston.

INSPECTION
1. INSPECT DISASSEMBLED PARTS
Inspect the disassembled parts for wear, rust or damage.

2. MEASURE BRAKE SHOE LINING THICKNESS
Using a ruler, measure the shoe lining thickness.
Standard thickness: 4.0 mm (0.157 inch)
Minimum thickness: 1.0 mm (0.039 inch)
If the thickness is less than the minimum or shoe lining shows signs of uneven wear, replace the brake shoes.

HINT: If a brake shoes needs replacing, the brake shoes must be replaced as a set

3. MEASURE BRAKE DRUM INSIDE DIAMETER
Using a brake drum gauge or equivalent, measure the inside diameter of the drum.
Standard inside diameter: 180.0 (7.087 inch)
Maximum inside diameter: 181.0 (7.126 inch)
If the drum is scored or worn, the brake drum may be lathed to the maximum inside diameter.

4. INSPECT REAR BRAKE LINING AND DRUM FOR PROPER CONTACT
If the contact between the brake lining and drum is improper, repair the lining with a brake shoe grinder, or replace the brake shoe assembly.

INSTALLATION
Installation is in the reverse order of removal.

NOTICE: Apply lithium soap base glycol grease and high temperature grease to the parts indicated by the arrows.

1. CHECK OPERATION OF AUTOMATIC ADJUSTING MECHANISM
a. Adjust the adjuster length to the as short as possible.

b. Install the brake drum.
c. Pull the parking brake lever all the way up until a clicking sound can no longer be heard.

2. CHECK CLEARANCE BETWEEN BRAKE SHOES AND DRUM
a. Remove the brake drum.
b. Measure the brake drum inside diameter and diameter of the brake shoes. Check that the difference between the diameters is the correct shoe clearance.
Shoe clearance: 0.6 mm (0.024 inch)
If incorrect, check the parking brake system.
c. Install the brake drum.
3. FILL BRAKE RESERVOIR WITH BRAKE FLUID
4. BLEED BRAKE SYSTEM
5. CHECK FOR LEAKS
6. INSTALL REAR WHEEL
Torque: 103 Nm (1,050 kgf-cm, 76 ft. lbs.)
_____________________________________

Let me know if this helps or if you have other questions.

Take care,
Joe
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Wednesday, December 19th, 2018 AT 7:33 PM
Tiny
THUDDRIVER01
  • MEMBER
Wow! Great come back Joe thanks. I will check the thickness of the brake shoe lining tomorrow as well as disconnecting the parking brake cable to insure its is not expanding the brake shoes. If I detect either I will get new shoes or adjust the parking brake cable. That I'm unsure of how to do. I understand there is a an adjustment that can be made from inside the car at the parking brake site.
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Wednesday, December 19th, 2018 AT 7:45 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Happy to help. As far as the parking brake adjustment, here are the directions. The attached pictures correlate with these directions.

____________________________________

Parking Brake Adjustment
Drum
1. Adjust the rear brakes.
2. Release the parking brake.
3. Raise and suitably support the vehicle.

4. Check the parking brake cables for free movement.
5. Lower the vehicle
6. Remove the parking brake / gearshift console hood.
7. Partially raise the vehicle.
8. Turn the self-locking nut on the parking brake lever assembly until the wheels are difficult to turn.
9. Back off the nut until the rear wheels are just free to turn.
10. Lower the vehicle

11. Install the parking brake / gearshift console hood.

Disc
1. Release the parking brake.
2. Raise and suitably support the vehicle.
3. Remove the rear wheels.
4. Remove the caliper and rotor assemblies.
5. Remove the brake rotors on each side of the vehicle.
6. Disconnect the parking brake cable from the backplate operating lever on each side of the vehicle.
7. Inspect and replace any parts of doubtful strength or quality. This can be shown by discoloration from heat or stress.

8. Using a vernier caliper, adjust the shoe assembly to 167.6 to 167.8 mm (6.60 to 6.61 inches) by turning the adjuster nut clockwise to increase the diameter. Measure the shoe assembly diameter as closely as possible to the center of the lining material.
9. Inspect and install the rotors and calipers.
10. Install the parking brake cable to the backplate lever on each side of the vehicle.
11. In the vehicle cabin, pull on the parking brake handle. Stop after hearing two clicks.
12. Turn the rear wheel by hand until the wheel begins to drag.
13. Release the parking brake.
14. Turn the rear wheel by hand to check the drag. Readjust the cable, if necessary.
15. Repeat the process for the other rear wheel.

16. Lower the vehicle.

__________________________

Let me know if this helps and how things work out for you. It's interesting that I am seeing this issue more and more. I question if they are exceeding tolerance when making the parts to ensure they last longer. I will say, other than this issue, I never had a problem. I run their parts on my own vehicles because I love their warranty.

Take care,
Joe
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Wednesday, December 19th, 2018 AT 8:01 PM

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