Excel EM56720 Mack 745-281860 Relay Valve

Relay Valve | RE-6 | Reservoir Port (1)3/4in NPT | Reservoir Port (1)3/8in NPT | Delivery Ports (4)1/4in NPT | Service Port (1)1/4in NPT | Emergency Supply Port (1)1/4in NPT

• Part number: EM56720
• OE MFG: MACK
• OEM Reference: 745-281860
• Cross Reference: MACK : 745-281860; OTHER : 281860, FN18010A
• Product Class: Air Valves & Kits

The PAI EM56720 is an RE-6 relay valve identified with Mack reference 745-281860. Relay valves are heavy duty diesel truck parts that use reservoir air to control brake application timing and flow between the supply and delivery circuits. Its listed configuration includes 3/4-inch and 3/8-inch NPT reservoir ports, four 1/4-inch NPT delivery ports, a 1/4-inch NPT service port, and a 1/4-inch NPT emergency supply port; cross-references include 281860 and FN18010A.