CB-534D, CB-534D XW and CB-564D Vibratory Asphalt Compactors Propel System Brake Pump Caterpillar


Brake Pump
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CB-534D, CB-534D XW and CB-564D Vibratory Asphalt Compactors Propel System [KENR3615]
BRAKING SYSTEM
PUMP GP
CB-534D, CB-534D XW and CB-564D Vibratory Asphalt Compactors Propel System Brake Pump
1.1. Normal Operation
2.2. Forward Position and Reverse Position
3.2. Hold Position
4.1. Manual Brake Release



Illustration 1g00936451

Brake Pump

(1) Hand pump

(2) Needle valve adjustment

(3) Oil to the return manifold

(4) Oil from the brake valve

(5) Oil to the brakes

Normal Operation

Note: When you operate the machine, the needle valve must be in the open position. In order to open the needle valve, turn the valve counterclockwise.

Forward Position and Reverse Position




Illustration 2g00939854

Brake Pump in Forward Position or in Reverse Position

(1) Hand pump

(2) Oil to the brakes

(3) Oil to the return manifold

(4) Adjustable needle valve

(5) Oil from the brake valve

(AA) Charge pressure

(AB) Sump

When the parking brake switch is in the OFF position, the brake valve shifts in order to allow charge pressure (5) to flow to the brake pump. The charge pressure passes through needle valve (4) and flows to the brakes (2). When the oil pressure disengages the brakes, the machine can move forward or backward.

Hold Position




Illustration 3g00939916

Brake Pump in Hold Position

(1) Hand pump

(2) Oil from the brakes

(3) Oil to the return manifold

(4) Adjustable needle valve

(5) Oil to the brake valve

(AA) Charge pressure

(AB) Sump

When the parking brake switch is in the ON position, the machine is in the hold position. The oil drains from the brakes (2) and passes through needle valve (4). The oil passes through the brake valve (5) and flows to the pump case. When there is no pressure in the brakes, the brakes engage and the machine cannot move.

Manual Brake Release




Illustration 4g00939918

Brake Pump (Manual Brake Release)

(1) Hand pump

(2) Oil to the brakes

(3) Oil from the return manifold

(4) Adjustable needle valve

(5) Oil to the brake valve

(AA) System pressure

(AB) Sump

The manual brake release pump allows the brakes to be disengaged when the machine is not running. This is useful for towing purposes.

When needle valve (4) is closed, hand pump (1) is used to supply pressure to the brakes.

Use the following procedure in order to release the brakes when the machine is not running.

  1. Block the drums in order to prevent movement of the machine. The machine can roll if the drums are not blocked.

  1. Loosen the setscrew on the thumb screw for the needle valve with a 5/64 Allen wrench. Turn the needle valve clockwise in order to close the valve.

  1. Push the hand pump plunger by hand until you can no longer move the plunger.

  1. In order to reapply the parking brake, turn the needle valve counterclockwise. This will open the valve.

  1. Use the 5/64 Allen wrench in order to tighten the setscrew on the thumb screw.

  1. Refer to Operation and Maintenance Manual, KEBU7514, "Towing the Machine" for more information.

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