Exhaust Brake Valve for Weichai WP13 612630110008

612630110008 Exhaust Brake Valve – WEVB Butterfly for Weichai WP12/WP13 Engines 1. Product Overview Mountain descents destroy wheel brakes. A loaded truck rolling down a 6% grade for 10 km converts enough energy to turn brake drums red and boil brake fluid. That is why Weichai equipped WP12 and WP13 engines with WEVB — Weichai Exhaust Valve Brake. This system uses two mechanisms together: the exhaust butterfly valve in this listing closes the exhaust passage, and the engine’s exhaust valve is held slightly open during compression and expansion strokes. The combined effect delivers 40–50% more braking force than a butterfly valve alone. If the butterfly does not close completely, the retarder feels weak and the wheel brakes absorb the entire load. If it sticks partially closed, exhaust flow is restricted at all times — raising exhaust gas temperatures and risking turbo damage. Either failure mode puts the truck and its driver at risk. We are Shaanxi Tolizer Machinery Equipment Co., Ltd…

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