Product Introduction 3518010LE35P Relay Valve is a core pneumatic control component for HFC JAC light truck air brake system. It amplifies control air signal and rapidly delivers large-volume compressed air to rear brake chambers, speeding up brake response and quick air exhaust when releasing brakes. This aftermarket replacement valve resolves slow brake engagement, delayed brake release, continuous air leakage and insufficient braking force caused by aging internal rubber diaphragms, stuck valve spool and corroded air ports of original relay valves, improving brake responsiveness and driving safety for urban logistics light cargo vehicles.

Product Advantages Adopts high-strength cast aluminum valve body, resisting impact and corrosion in complex chassis environment. Reinforced rubber diaphragm maintains stable sealing under cyclic air pressure changes. Precision internal flow channel ensures fast air inflow and exhaust. Every relay valve undergoes air tightness and dynamic response testing before delivery, reliable performance and reduces air consumption of the whole pneumatic brake system.

Applicable Models Fit for JAC HFC series light-duty diesel trucks, widely used for urban cargo delivery and short-distance logistics vehicles equipped with air brake system.

FAQ

Q1: What symptoms indicate defective air brake relay valve?
A1: Slow rear wheel brake response, air leaking continuously and brakes take long time to release.
Q2: What causes internal diaphragm damage of relay valve?
A2: Moisture, oil contamination inside compressed air and long-time pressure cycling accelerate aging.
Q3: Can relay valve failure lead to brake drag?
A3: Yes, residual air trapped in brake chamber will keep brakes partially engaged and cause overheating.
Q4: What maintenance should be done for pneumatic brake system?
A4: Regularly drain air dryer and air tank to remove water and oil impurities to protect air valves.