Bleeding Service Brakes

causym CAUTION: Do not operate machine if pedal travel exceeds specification while applying 267 N (60 lb-force). Operating machine with excessive brake travel could cause brakes not to stop machine on first application.

NOTE: Air will "gravity bleed" from brake system through brake valve without use of bleed screws. Brake lines must be inclined toward brake valve.

Low ambient temperature or aeration of oil will slow bleed process.

Bleeding Brakes Manually

1. Engage park brake. Run engine at fast idle. Dump and curl backhoe bucket five times.

2. Run engine at slow idle. Pump left-side brake pedal five times, allowing two seconds between each pump for air to escape.

3. Repeat steps 1 and 2 until the left-side brake pedal is solid.

4. Pump right-side brake pedal until pedal is solid, then pump both brake pedals together until both brake pedals are solid.

5. Check pedal travel.

Specification

Dual Brake Pedal Travel -Distance 95 mm (3.75 in.) Maximum
Single Brake Pedal Travel -Distance 114 mm (4.5 in.) Maximum

Bleeding Brakes with Vacuum Device

1. Engage park brake. Connect a vacuum to breather port on hydraulic reservoir. After 10 minutes, disconnect air pressure.

2. Leave hose from breather port to vacuum device connected until brake circuit is filled with oil. Both pedals should become solid.

T6838AE

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3. Check pedal travel.

Specification

Dual Brake Pedal Travel -Distance 95 mm (3.75 in.) Maximum
Single Brake Pedal Travel -Distance 114 mm (4.5 in.) Maximum

Brakes will continue to self-bleed as you operate machine and pedal firmness should improve. If unable to obtain firm brake pedal, inspect lines and connections for leakage. See your authorized dealer.

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