Description
KN20551-G - TRAILER HAND CONTROL VALVE
PART NUMBER(S):
Fleet Products: KN20551-G | Replaces OE: Haldex: KN20551, KN20541, N30103BA, N30103BC, N30103BN | WABCO: 9617990050, 9617990090, 9677990160 | Bendix: 101860 | Meritor: RKN20541
DESCRIPTION:
Model: Graduated Trailer Hand Control Valve
Vehicles: Tractor-trailer combinations with independent trailer service brake control
• Valve Type: Manually operated graduated pneumatic control valve
• Supply Port: One 1/4" NPT
• Delivery Port: One 1/4" NPT
• Exhaust Port: One 1/4" NPT
• Maximum Operating Pressure: 150 PSI
• Mounting: In-column or dash installation, depending on the vehicle mounting configuration
• Control Function: Provides graduated air-pressure control to the trailer service brakes "NOT FOR PARKING"
• Components: Mounting bracket and handle sold separately
• System Limitation: Not designed to apply or hold parking or spring brakes
Applications:
Designed for tractor air brake systems requiring independent, graduated application of the trailer service brakes. It is typically replaced when trailer brake modulation becomes inconsistent, the valve leaks, or delivery pressure does not respond correctly to control-handle movement.
CROSS-REFERENCE(S):
FSKN20551X, R955KN20541X, KN20541X, 101910, 102388, 102388N, 102705, 102706, 102707, 102708, 108089, 109260, 120708, S9617990050, S9617990090, S9677990160
A cross-reference listing means this part may be a suitable replacement for the listed part numbers. Always verify fitment before installation.
IMPORTANT INSTALLATION NOTES:
✔ Do not use this valve for parking or spring brake actuation.
✔ Connect the 1/4" NPT supply, delivery, and exhaust ports according to the vehicle air schematic.
✔ Torque the mounting screws to 30-60 in-lb (3.4-6.8 Nm).
✔ Torque the air-line fittings to 10 ft-lb (13.6 Nm).
✔ Secure the valve and control assembly, then verify smooth graduated trailer brake application and complete release.
Warranty Information
