Push Pull Valve w/out Knob | 7/8-20 Thread | Supply Port (1)1/4-18 NPT | Control Port (1)1/8-27 NPT | Delivery Port (1)1/4-18 NPT | Exhaust Port (1)1/4-18 NPT Part number: LPP-3502 OE MFG: MACK OEM Reference: 745-288241 Cross Reference: MACK : 745-106113, 745-287251, 745-287282, 745-288007, 745-288241; OTHER : 106113, 287251, 287282, 288007, 288241 Product Class: Air Valves & Kits The PAI LPP-3502 is a Push Pull Valve w/out Knob with a 7/8-20 thread, one 1/4-18 NPT supply port, one 1/8-27 NPT control port, one 1/4-18 NPT delivery port, and one 1/4-18 NPT exhaust port. Push-pull valves are heavy duty diesel truck parts that direct compressed air between supply, control, delivery, and exhaust circuits as the valve is actuated. The port configuration and thread sizes provide key details for matching this component to the intended air system. MACK lists 745-288241 as the OEM reference; additional MACK cross-references include 745-106113 and 745-287251.