Relay Valve R-14H Horizontal Delivery and Supply Ports (2) 1/2in-14 Supply Ports (2) 1/2in-14 Delivery Ports (1) 1/4in-18 Service Port (1) 1/8in-27 Balance Port 4 psig Cracking Pressure Use w/ Bendix 296007 Mounting Bracket. This Part Also Available in Excel EM 36840
- Part number: LRV-3684
- OE MFG: MACK
- OEM Reference: 745-104574
- Cross Reference: MACK : 745-104574; OTHER : 104574
- Product Class: Air Valves & Kits
The PAI LRV-3684 is an R-14H relay valve with horizontal delivery and supply ports, identified for the Mack reference 745-104574. As heavy duty diesel truck parts, relay valves route compressed air through a vehicle’s braking system, using a control signal to manage delivery airflow closer to the brake actuators. This configuration includes two 1/2in-14 supply ports, two 1/2in-14 delivery ports, a 1/4in-18 service port, a 1/8in-27 balance port, and 4 psig cracking pressure; it is specified for use with the Bendix 296007 mounting bracket. Cross-reference 104574 is also supplied.







