БЛОК КЛАПАНА ПОСЛЕДОВАТЕЛЬНОСТИ Caterpillar 5428667

The Parking Brake Control Sequence Valve manages hydraulic flow within the parking brake circuit to ensure that brake release and brake application occur in the correct order. It opens only when upstream pressure reaches the required level, allowing the brake release function to occur safely and with proper timing. When pressure drops, the valve helps ensure that the parking brake re‑engages in a controlled manner. It sequencing prevents premature release, helps avoid backflow, and supports stable brake behavior during directional changes, system startup, or shutdown.Attributes:• Controls hydraulic flow timing in the parking brake circuit.• Ensures brake release occurs only at preset pressure levels.• Helps maintain safe and controlled brake engagement.• Internal leakage is 82 milliliter per minute maximum at 90 percent setting.Applications: The Parking Brake Control Sequence Valve is installed in the hydraulic parking brake circuit to manage flow direction and timing. It helps maintain safe brake release, prevent reverse flow, and support stable brake engagement throughout normal operation.