ALTRACO ELECTRONIC DISC BRAKE CALIPER Especificações descarregar pdf (Página 20)

Section 6

Troubleshooting

Brake Does Not Apply

Condition Possible Causes Correction

There is no pressure to 1. Empty fluid reservoir 1. Fill the reservoir to the correct level with specified fluid.

the brake.

2. Damaged hydraulic system 2. Repair the hydraulic system.

Piston does not move. 1. No pressure to brake 1. Fill the reservoir to the correct level with specified fluid.

2. Piston not straight in the bore 2. If piston diameter is less than 2.995 inches

(76.073 mm): Replace piston.

If caliper bore diameter is greater the 3.003 inches

(76.276 mm): Replace the caliper housing.

If tapered lining wear exists: Replace the linings. Remove

dirt and other material between the lining and piston.

Brake leaks. 1. Loose bleeder screw 1. Tighten the bleeder screw to 100-180 lb-in. (11.3-20.3 N•m).

If the leak continues, replace the bleeder screw.

2. Loose inlet fitting 2. Tighten the inlet fitting. If the leak continues, replace the O-ring.

3. Damaged inlet fitting 3. Replace the inlet fitting.

4. Worn or damaged piston, 4. Inspect the piston and housing bore for wear and damage.

housing bore, O-rings Service as necessary. Replace O-rings and backup rings.

and/or back-up rings

5. Loose cylinder cap 5. Replace the O-ring. For HDB 640, tighten the cylinder cap to

500 lb-ft (680 N•m) minimum.

For SCL 35, 46 and 53, tighten the cylinder cap to 75 lb-ft

(100 N•m) minimum.

Linings are damaged. 1. Lining thickness less than 1. Replace the linings.

0.125 inch (3.2 mm)

2. Lining wear not even 2. Inspect the piston. Service the piston as necessary.

If caliper bore diameter is more than 3.003 inches

(76.276 mm): Replace caliper.

Inspect the housing for clogged fluid passages.

Service as necessary. If end plates are worn, replace them.

3. Cracked or broken linings 3. Replace the linings.

4. Oil or grease on linings 4. Replace the linings.

Brake Does Not Release

Condition Possible Causes Correction

Vehicle does not move. 1. Parking brake applied 1. Release the parking brake.

2. Damaged hydraulic system 2. Repair the hydraulic system.

Brakes drag. 1. More than 3 psi (.2 bar) 1. Repair the hydraulic system so that pressure is less than 3 psi

pressure applied when (.2 bar) when the brakes are released. Bleed the brakes.

brakes are released

2. Vehicle or equipment not 2. Advise the operator on correct vehicle or equipment

operated correctly operation.

3. Piston not straight in the bore 3. If piston diameter is less than 2.995 inches

(76.073 mm): Replace piston.

If caliper bore diameter is more than 3.003 inches

(76.276 mm): Replace the caliper housing.

If tapered lining wear exists: Replace linings. Remove dirt and

other material from the lining and piston.

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