Wabco 4460440860 ABS Hydraulic Control Unit

Description

The Wabco 4460440860 is an ABS Hydraulic Control Unit, crucial for maintaining vehicle stability by preventing wheel lock-up during braking. This unit is primarily used in commercial vehicles and is designed to regulate brake pressure independently to each wheel. Its robust design, adhering to OE specifications and featuring a diagnostic capability compliant with SAE J1587, ensures reliable performance and ease of integration. The unit measures 112x122 mm between mounting holes, utilizes 3 x Ø 7.5 mm mounting points, and operates within a temperature range of -40°C to +75°C, with an IP 30 protection class. It operates at 12V and is of type 4S/4M, version ABS-HYDR.-D.

Key Features & Benefits

This thing is pretty complex, honestly. It manages the flow of brake fluid to each wheel, and it does that using a series of valves and a pump. It works with your ABS system – the sensors detect when a wheel is starting to lock up during braking, and this unit is what actually makes the pulsing you feel happen. It rapidly opens and closes those valves to prevent skidding. It also includes the hydraulic pump that builds pressure when the system needs it, and some have an electric motor to power that pump. Basically, it takes the signal from your ABS system and translates it into actual brake force control at each wheel. Think of it as the brain behind your ABS. The wheel speed sensors tell the main computer something’s wrong, and this unit is the muscle that fixes it. It’s a key piece of your entire braking system. It works alongside your brake booster and master cylinder. When you push the brake pedal, the master cylinder creates hydraulic pressure. This unit then takes that pressure and modulates it to each wheel independently, making sure you maintain steering control in a hard stop.

Symptoms, Risks & Replacements

It’s a big safety item, plain and simple. Without this working right, your ABS won’t work, and you could lose control of the vehicle during emergency braking, especially on slippery surfaces. You’ll notice if it’s failing because your ABS light will probably be on, and you might feel a longer stopping distance, or even pulsing in the brake pedal when it shouldn’t be there. It’s definitely one of those parts you don’t want to mess around with. You can often find a good replacement unit at places like Fixparts Online, but make sure it’s the correct one for your vehicle. Getting this wrong can have serious consequences, so if you’re not comfortable with this repair, a professional is always the best bet.

Warranty Information

Wabco ABS Hydraulic Control Unit (MPN 4460440860) comes with a 1-year warranty.