CYLINDER AS 1124283 - Caterpillar

Illustration 1 g00739113
Rear Axle (1) Left air purge screw. (2) Right air purge screw.
Fill the brake fluid reservoir with oil. Add oil to the brake reservoir during the purge procedure in order to maintain the proper level. Refer to Operation and Maintenance Manual, "Recommended Oils" and Operation and Maintenance Manual, "Refill Capacities".
Open the left air purge screw (1) and the right air purge screw (2) while the brake fluid reservoir is being filled. Fill the brake fluid reservoir until oil flows from the air purge screws. Close both of the air purge screws.
Fasten one end of a transparent tube that is 6.4 mm (0.25 inch) in diameter to the left air purge screw (1) and the right air purge screw (2) . Put the other end of the tubes into a suitable container for collecting the hydraulic oil.
Illustration 2 g01031260
Brake Pedals (3) Left brake pedal. (4) Right brake pedal. (5) Lock bar.
Unlock the lock bar (5) .
Depress both pedals five times in a rapid manner. This process is called stroking.
Open the left air purge screw (1) . Stroke the left pedal (3) fifty times in a steady manner. Close the left air purge screw (1) .
Stroke the right brake pedal (4) five times in a rapid manner.
Open the right air purge screw (2) . Stroke the right pedal (4) fifty times in a steady manner. Close the right air purge screw (2) .
Open the left air purge screw (1) . Depress the left brake pedal and hold the left brake pedal (3) 9 cm (3.5 inch) from the rest position. While the left pedal (3) is held down, stroke the right pedal (4) fifty times in a steady manner.
Close the left air purge screw (1) and release the left brake pedal (3) .
Stroke the left brake pedal (3) five times in a rapid manner.
Open the left air purge screw (1) . Stroke the left brake pedal (3) fifty times in a steady manner. Close the left air purge screw (1) .
Open the right air purge screw (1) . Depress the right brake pedal and hold the right brake pedal (3) 9 cm (3.5 inch) from the rest position. While the right pedal (3) is held down, stroke the left pedal (4) fifty times in a steady manner.
Close the right air purge screw (1) and release the right brake pedal (3) .
Stroke the right brake pedal (3) five times in a rapid manner.
Open the right air purge screw (1) . Stroke the right brake pedal (3) fifty times in a steady manner. Close the right air purge screw (1) .
Close both of the air purge screws. Stroke both pedals ten times in a rapid manner.
Inspect the brake system for leaks.
Fill the brake reservoir with oil.
Lock the lock bar (5) .
Perform the braking system test. Refer to Operation and Maintenance Manual, "Braking System - Test".Note: If the brake pedal is spongy during the first hours of operation, perform this procedure again.Purge Procedure for All Wheel Steer
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