SYSTEM / Control System Travel Motor Swash Angle Control Purpose: Selects the travel mode. Operation: Slow Travel Mode 1. With the travel mode switch the (SLOW) position, no electrical current flows to solenoid valve unit (SI). 2. As solenoid valve unit (SI) is not activated (shifted), pressure oil from the pilot pump is not supplied to the travel mode selection valve. 3. For this reason, the travel mode selection valve is not shifted, and pressure oil in the travel circuit in control valve is not supplied to the tilt pistons. Consequently, the travel motors rotate in the slow speed mode.
(Refer to the Travel Device group / COMPONENT OPERATION.) From Main Pump Solenoid Valve Unit (SI) Brake Valve Pilot Pump Travel Mode Contlr Valve Travel Motor MC Travel Mode Switch Tilt Piston Parking Brake T2-2-48