phsautomotivesalsphsautomotivesals disc brake overhaul

PHS

AUTOMOTIVE

SALS

DISC BRAKE OVERHAUL

PHS

AUTOMOTIVE

SALS

Couple of things to think about when working on brakes.

1. Some ones life may hang in the balance if you do a poor or second rate job.

2. If you do not think a part will work right replace it.

3. Always put in new brake pads, if the hardware has problems replace it and if the caliper or piston is worn or pitted replace it. And last but not least inspect the hose for wear and cracks.

PHS

AUTOMOTIVE

SALS

Jack up car and place safety stands in an appropriate place

Remove wheel

PHS

AUTOMOTIVE

SALS

remove wheelcheck wheel studs and lug nuts(replace if necessary)

PHS

AUTOMOTIVE

SALS

remove caliber and brake padscheck rotor for run out

PHS

AUTOMOTIVE

SALS

mike rotor for Thickness variations

PHS

AUTOMOTIVE

SALS

if rotor needs to be turned, look up proper procedures on how to

remove before removing

PHS

AUTOMOTIVE

SALS

Inspect brake lines and hoses

PHS

AUTOMOTIVE

SALS

If car has very many miles or if seal looks bad or piston rusted, replace the caliber assembly

PHS

AUTOMOTIVE

SALS

Replace with a loaded caliper (ones with brake shoes in)

Another option is to rebuild the caliber

PHS

AUTOMOTIVE

SALS

to rebuild caliber

PHS

AUTOMOTIVE

SALS

1. Remove bleeder screw and make sure passage is clear this is the first step if we have a problem

we need to replace the screw or the whole caliper.

PHS

AUTOMOTIVE

SALS

2. Removing piston out of caliper

PHS

AUTOMOTIVE

SALS

Ways of removing piston out of the caliper

1. Hydraulic pressure, just take caliper off of rotor, set over a pan to catch the brake fluid and step on the brake until

it comes out

PHS

AUTOMOTIVE

SALS

Air pressure - take caliper off and use a air nozzle to blow it out of

its bore CAUTION

if fingers are in the way you might lose them be careful

You can also break the piston

PHS

AUTOMOTIVE

SALS

3. Hone the cylinder if piston is pitted and scored

and cannot be cleaned up with crocus cloth replace the piston

PHS

AUTOMOTIVE

SALS

4. Clean up caliber with wire brush, if time permits dry and

glass bead.

PHS

AUTOMOTIVE

SALS

5. Install rubber parts lube up with brake fluid

PHS

AUTOMOTIVE

SALS

6. press piston into bore with C clamp or large water pump pliers

PHS

AUTOMOTIVE

SALS

Before you push the piston back into the cylinder take the cap off the master cylinder and drain out

some of the fluid

PHS

AUTOMOTIVE

SALS

If you are just changing the pads and push the piston back into the

caliper, if you have anti-lock brakes I recommend that you flush

out and bleed the Brake fluid before you push the piston back in.

I don’t like old fluid going back into the anti-lock components.

PHS

AUTOMOTIVE

SALS

If we allow the junk and debris to go back up to the anti-lock components we can have problems. Please advise

customers to have the brake fluid flushed to get rid of the debris and

moisture in the brake fluid.

PHS

AUTOMOTIVE

SALS

Clean with wire brush lightly grease all contact points between caliper and anchor plate

PHS

AUTOMOTIVE

SALS

Check all rubber guide pin bushings and o-rings

check the anti rattle clips replace if worn or damaged

PHS

AUTOMOTIVE

SALS

reassembled bleed brakes

PHS

AUTOMOTIVE

SALS

Instead of rebuilding the calipers you can get a loaded caliper (ones with brake shoes in) by replacing

a caliper instead of doing it yourself you get some of the

liability off of you.

PHS

AUTOMOTIVE

SALS

The End