Brake Flex hose replacement instructions please?

Tiny
STABS
  • MEMBER
  • 2003 CHEVROLET SUBURBAN
  • 165,000 MILES
Cannot change the hose with out help?
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Saturday, February 9th, 2013 AT 11:52 PM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

Replacing the brake hose isn't too hard. The worst part is if the connector is rusted. You have to be careful when loosening it not to break the rusted steel line.

Here are the directions for replacement specific to your vehicle. The attached pics correlate with the directions.

_____________________________

2003 Chevy Truck K 1500 Suburban 4WD V8-5.3L VIN T
Front
Vehicle Brakes and Traction Control Hydraulic System Brake Hose/Line Service and Repair Procedures Brake Hose Replacement Front
FRONT
Brake Hose Replacement - Front

Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in Cautions and Notices.

Note: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
3. Clean all dirt and foreign material from the brake hose end and brake pipe fitting.

Pic 1

Important: Install a rubber cap or plug to the exposed brake pipe fitting end in order to prevent brake fluid loss and contamination.

4. Use a backup wrench on the brake hose fitting end (2), disconnect the brake pipe fitting end (1) from the brake hose (2), then cap or plug the brake pipe fitting end.
5. Remove the brake hose retaining clip (3) from the brake hose mounting bracket.

Pic 2

6. Remove the brake hose bracket bolt from the upper control arm.
7. Remove the brake hose bracket bolt from the steering knuckle.

Pic 3

8. Remove the brake hose to caliper bolt from the brake caliper.
9. Remove and discard the 2 copper brake hose gaskets. These gaskets may be stuck to the brake caliper housing or the brake hose end.

Installation Procedure

Important: Install 2 new copper brake hose gaskets.

1. Assemble the 2 new copper brake hose gaskets and the brake hose bolt to the brake hose.

Note: Refer to Fastener Notice in Cautions and Notices.

2. Install the brake hose to caliper bolt and 2 new washers to the brake caliper.
- Tighten the bolt to 40 N.M (30 lb ft).

Pic 4

Important: The brake hose must not be twisted. Make sure the brake hose is not in contact with any suspension component.

3. Install the brake hose bracket bolt and the bracket to the steering knuckle.
- Tighten the bolt to 9 N.M (80 lb in).
4. Install the brake hose bracket bolt and the bracket to the upper control arm.
- Tighten the bolt to 9 N.M (80 lb in).

Pic 5

5. Install the brake hose into the brake hose bracket.
6. Install the brake hose retaining clip (3).
7. Remove the rubber cap or plug from the brake pipe fitting end.
8. Connect the brake pipe fitting end (1) to the brake hose (2):
- Use a backup wrench on the brake hose fitting end (2).
- Do not bend the mounting bracket or the brake pipe.
- Tighten the brake pipe fitting end (1) to 25 N.M (18 lb ft).
9. Bleed the hydraulic brake system. Refer to in Hydraulic Brake System Bleeding (Manual)Hydraulic Brake System Bleeding (Pressure).
10. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.

Important: Ensure that the brake hose does not make contact with any part of the suspension or the tire/wheel assembly. Inspect the brake hose in extreme right and left turn conditions. If the brake hose makes contact remove the brake hose and correct the condition.

11. Lower the vehicle.

_____________________________________

Here are the directions for manual bleeding.

2003 Chevy Truck K 1500 Suburban 4WD V8-5.3L VIN T
Manual
Vehicle Brakes and Traction Control Hydraulic System Brake Bleeding Service and Repair Procedures Hydraulic Brake System Bleeding Manual
MANUAL
Hydraulic Brake System Bleeding (Manual)

Caution: Refer to Brake Fluid Irritant Caution in Cautions and Notices.

Note:Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.

Note:When adding fluid to the brake master cylinder reservoir, use only Delco Supreme 11(r), GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container. The use of any type of fluid other than the recommended type of brake fluid, may cause contamination which could result in damage to the internal rubber seals and/or rubber linings of hydraulic brake system components.

1. Place a clean shop cloth beneath the brake master cylinder to prevent brake fluid spills.
2. With the ignition OFF and the brakes cool, apply the brakes 3-5 times, or until the brake pedal effort increases significantly, in order to deplete the brake booster power reserve.
3. If you have performed a brake master cylinder bench bleeding on this vehicle, or if you disconnected the brake pipes from the master cylinder, you must perform the following steps:

3.1. Ensure that the brake master cylinder reservoir is full to the maximum-fill level. If necessary add Delco Supreme 11(r), GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container. If removal of the reservoir cap and diaphragm is necessary, clean the outside of the reservoir on and around the cap prior to removal.
3.2. With the rear brake pipe installed securely to the master cylinder, loosen and separate the front brake pipe from the front port of the brake master cylinder.
3.3. Allow a small amount of brake fluid to gravity bleed from the open port of the master cylinder.
3.4. Reconnect the brake pipe to the master cylinder port and tighten securely.
3.5. Have an assistant slowly depress the brake pedal fully and maintain steady pressure on the pedal.
3.6. Loosen the same brake pipe to purge air from the open port of the master cylinder.
3.7. Tighten the brake pipe, then have the assistant slowly release the brake pedal.
3.8. Wait 15 seconds, then repeat steps 3.3-3.7 until all air is purged from the same port of the master cylinder.
3.9. With the front brake pipe installed securely to the master cylinder - after all air has been purged from the front port of the master cylinder - loosen and separate the rear brake pipe from the master cylinder, then repeat steps 3.3-3.8.
3.10. After completing the final master cylinder port bleeding procedure, ensure that both of the brake pipe-to-master cylinder fittings are properly tightened.

4. Fill the brake master cylinder reservoir with Delco Supreme 11(r), GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container. Ensure that the brake master cylinder reservoir remains at least half-full during this bleeding procedure. Add fluid as needed to maintain the proper level. Clean the outside of the reservoir on and around the reservoir cap prior to removing the cap and diaphragm.
5. Install a proper box-end wrench onto the RIGHT REAR wheel hydraulic circuit bleeder valve.
6. Install a transparent hose over the end of the bleeder valve.
7. Submerge the open end of the transparent hose into a transparent container partially filled with Delco Supreme 11(r), GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.
8. Have an assistant slowly depress the brake pedal fully and maintain steady pressure on the pedal.
9. Loosen the bleeder valve to purge air from the wheel hydraulic circuit.
10. Tighten the bleeder valve, then have the assistant slowly release the brake pedal.
11. Wait 15 seconds, then repeat steps 8-10 until all air is purged from the same wheel hydraulic circuit.
12. With the right rear wheel hydraulic circuit bleeder valve tightened securely - after all air has been purged from the right rear hydraulic circuit - install a proper box-end wrench onto the LEFT REAR wheel hydraulic circuit bleeder valve.
13. Install a transparent hose over the end of the bleeder valve, then repeat steps 7-11.
14. With the left rear wheel hydraulic circuit bleeder valve tightened securely - after all air has been purged from the left rear hydraulic circuit - install a proper box-end wrench onto the RIGHT FRONT wheel hydraulic circuit bleeder valve.
15. Install a transparent hose over the end of the bleeder valve, then repeat steps 7-11.
16. With the right front wheel hydraulic circuit bleeder valve tightened securely - after all air has been purged from the right front hydraulic circuit - install a proper box-end wrench onto the LEFT FRONT wheel hydraulic circuit bleeder valve.
17. Install a transparent hose over the end of the bleeder valve, then repeat steps 7-11.
18. After completing the final wheel hydraulic circuit bleeding procedure, ensure that each of the 4 wheel hydraulic circuit bleeder valves are properly tightened.
19. Fill the brake master cylinder reservoir to the maximum-fill level with Delco Supreme 11(r), GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container.
20. Slowly depress and release the brake pedal. Observe the feel of the brake pedal.
21. If the brake pedal feels spongy, repeat the bleeding procedure again. If the brake pedal still feels spongy after repeating the bleeding procedure, perform the following steps:

21.1. Inspect the brake system for external leaks. Refer to Brake System External Leak Inspection.
21.2. Pressure bleed the hydraulic brake system in order to purge any air that may still be trapped in the system.

22. Turn the ignition key ON, with the engine OFF. Check to see if the brake system warning lamp remains illuminated.

Important: If the brake system warning lamp remains illuminated, DO NOT allow the vehicle to be driven until it is diagnosed and repaired.

23. If the brake system warning lamp remains illuminated, refer to Symptoms - Hydraulic Brakes.

___________________________________

I hope this helps. Let me know if you have other questions.

Take care and God Bless,

Joe
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Saturday, March 13th, 2021 AT 10:22 PM

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