Operation 9 and 13-Speed Air Systems (Top 2 & Convertible) and 18-Speed (Top-2) In addition to the range air system components, the splitter air system uses a splitter cylinder and the Roadranger Valve A-4900/ A-6913 or the Two-Position Selector Valve. Air is supplied to the system at the air supply port (1) by the vehicle’s air system. The air filter (2) removes foreign matter from the air then allows it to pass through the air filter regulator (3) where the pressure is adjusted for 58 to 63 psi. From there, the air passes through the supply air hose (4) to the slave valve supply port (5), through the supply air line (6) to the control valve. Depending upon the position of the splitter button (7), if air passes through the air line (8) connected to the splitter cylinder center port (9) then the underdrive/overdrive gearing is engaged. If there is no air, the constant air from the air filter/regulator assembly (10) moves the splitter piston forward to disengage underdrive or overdrive gear.
18-Speed Operation
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