Product Description
The WABCO 4725000120 is an Easy-Stop trailer ABS ECU and modulator valve assembly designed for heavy-duty trailer anti-lock braking systems. The unit combines the electronic ABS controller with pneumatic brake-pressure modulation in a single assembly.
WABCO documentation shows that the 4725000120 was used in 2S/1M, 2S/2M, and 4S/2M configurations. The exact sensor and valve arrangement can vary depending on how the original trailer ABS system was configured, so the existing part number and system layout should be verified before ordering.
WABCO later replaced the original 4725000120 design with its Enhanced Easy-Stop system. WABCO identifies 4005001030 as the replacement ECU/dual-modulator valve assembly, with R955320/R955321 replacement kits also associated with converting the older 4725000120 system.
Part Number: 4725000120
Brand: WABCO
Product Type: Trailer ABS ECU / Modulator Valve Assembly
ABS Family: Easy-Stop
System Configurations: 2S/1M, 2S/2M, 4S/2M
Replacement References: 4005001030, R955320, R955321, 4006120100
System: Trailer Air Brake ABS
