Description

Overview

The TC4 modulating control valve gives drivers smooth, progressive control of spring brakes on heavy trucks and trailers. Consequently, it helps with gentle parking, precise docking and confident holding on grades in daily fleet work.

Features

• Cam-operated, lever-graduated output for fine spring-brake modulation
• Dash-mounted control so the driver can apply and release brakes from the cab
• TC4 layout that integrates with common heavy-vehicle air brake schematics
• Durable metal body and spring pack for long service in harsh conditions

Specifications and Materials

Part number: AB8344P.
This TC4 modulating valve uses a cam, piston and spring pack to graduate delivery pressure as the lever moves, then vents cleanly when the handle returns to rest. Install it on the dash or control panel within easy reach so the driver can feather pressure during parking. For detailed operation and service information, see the manufacturer technical guide for the Bendix TC-4 control valve

Compatibility and Fitment

This valve suits TC4-style spring-brake control circuits on prime movers, rigid trucks and trailers. This cross-reference listing means this valve is a suitable replacement for the part numbers and applications shown. Some changes in air line plumbing may be required. 282382, 282368, ABC282382, TC-4, 745-282382N, BAN282382N, BEN282382N, BW 282382N, BX282382N, TWDBEN282382N, 282382N.

Compliance and Safety

Follow the vehicle manufacturer schematic and recognised heavy-vehicle air-brake practices. Depressurise the system, chock wheels and isolate the vehicle before work. After installation, soap-test all joints, then confirm that spring brakes apply and release evenly across axles as you move the lever. Finally, verify that the valve returns fully to exhaust when the handle returns to neutral.

Trailer Applications

Use this TC4 valve on combinations with spring brakes on drive and trailer axles. It suits semi-trailers, B-doubles and dollies in linehaul and distribution. Additionally, drivers gain smoother parking control during yard moves, loading and docking.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Why Choose ICS Trailers

ICS Trailers focuses on air-brake parts that match Australian heavy-vehicle work, so you can select valves and hardware with confidence. Our team understands spring-brake circuits and can help validate TC4 layouts and interchange lists to keep your fleet moving. Browse the Air Brake Parts category at ICS Trailers