Zhongtong Bus Brake Relay Valve 3527D2-010-A-H Air Brake System Repair Part

3527D2-010-A-H Brake Relay Valve for Zhongtong Bus

Direct replacement brake relay valve designed for Zhongtong city buses, coaches and intercity buses. This relay valve controls the air pressure delivered from the reservoir to the brake chambers, giving fast, balanced and repeatable brake response on every axle. The part number 3527D2-010-A-H matches the original Zhongtong air brake layout, so it installs without modification.

Product Highlights

• OE matching part number - 3527D2-010-A-H fits Zhongtong bus air brake circuits directly
• Fast pressure response - balanced air delivery to front and rear brake chambers
• Leak tested body - each valve is pressure tested before packing to hold stable pressure at 0.8 MPa
• Corrosion resistant aluminium housing - anodised surface for humid and coastal operating conditions
• Stable rubber diaphragm - ozone and oil resistant compound for long service life
• Wide temperature range - reliable from -40 C to +80 C

Technical Specifications

Why Replace the Relay Valve

A worn relay valve causes slow brake release, uneven braking between axles, air pressure drop in the reservoir and continuous compressor cycling. Replacing the valve with the correct 3527D2-010-A-H unit restores factory brake timing and keeps the air system inside its design pressure range.

Installation Notes

1. Drain the air system and confirm zero pressure before removing the old valve.
2. Clean the pipe unions and check the sealing washers before fitting the new valve.
3. Tighten the M22 x 1.5 unions to the specified torque, then refill the system and check for leaks at every port.
4. Carry out a brake performance test on a safe road before putting the bus back into service.

Packing and Delivery

Each valve is packed in an anti-rust bag with a protective cap on every port, then placed in an export-grade carton. Carton marking, neutral packing and pallet packing are available for wholesale and fleet orders.

Supply Support

We supply a full range of Zhongtong, Yutong, Higer and King Long bus spare parts. Send us your part number list and we will confirm stock, price and shipping schedule within one working day.