Description

WABCO RKN20903 is a parking brake control knob kit used in heavy‑duty truck air brake systems.
Part Details
Description: Knob Kit (Air Brake / Parking Brake Control)
Function:
Manually engages and releases the parking brake on trucks
Typically used on dash-mounted push‑pull valves
Color: Yellow (standard for parking brake) [finditparts.com]
Mounting: ~3/8″ shaft, pin-type knob
Application: Heavy-duty trucks, buses, commercial vehicles
Common Cross References
Haldex: KN20903
Bendix / various: 248502 series
Meritor: RKN20903
WABCO alt #: 9366496764