RT4 Multi-Function Trailer Valve

RT4 Multi-Function Meets all FMVSS-121 trailer requirements for spring brake control and other regulations from October 1992 to present. Interchangeable with competitive units. Used on trailers to control both parking and emergency brake functions. Controls reservoir charging. Applies emergency (parking) brakes upon loss of trailer supply (emergency) line pressure. Trailer Supply (A) Plugged Trailer Supply (B) 3/8" Trailer Control 3/8" Reservoir (A) 1/2" Reservoir (B) 3/8" Delivery (4) 3/8" PPV Closing Pressure 70 PSI Interchange: A-CE9754-1 ACE009754001 ACE97541 AKN26000 HA-KN26020 HAKN26020 KN26020 MBRK26020 MI-KN26020 MIKN26020 N4305A 10003894 10023073 12900088 12900481 20MIDKN26020 39300262