WAB4585019242 | Genuine Wabco® Kit, Accumulator for HCU

International / Navistar

Mack

Volvo Trucks

Freightliner

Kenworth

Peterbilt

Stores hydraulic pressure — keeps pressurized fluid available for rapid use.

Maintains braking performance — helps the hydraulic system provide the pressure needed for braking functions.

Supports ABS operation — in applicable systems, helps manage hydraulic pressure during anti-lock braking events.

Absorbs pressure fluctuations — helps stabilize pressure changes within the hydraulic circuit.

Improves system response — allows the system to access stored hydraulic energy rather than relying entirely on the pump to generate pressure instantaneously.

ABS or brake warning light — the dashboard may display an ABS, brake, or hydraulic-system warning.

Pump runs too frequently — the hydraulic pump may activate more often than normal because the accumulator cannot retain pressure.

Slow pressure buildup — the system takes longer than usual to reach its required hydraulic pressure.

Unusual pump noise — the pump may run longer or more frequently, sometimes producing abnormal sounds.

Changes in brake-pedal feel — the pedal may feel unusually hard, soft, or inconsistent, depending on the system.

Hydraulic pressure fault codes — diagnostic equipment may report pressure-related errors or accumulator performance faults.

Reduced braking assistance — some systems may provide reduced brake assist if hydraulic pressure becomes insufficient.