Transmission activating and Neutralizing system

摘要

A system (10) for activating and neutralizing a transmission (12) of a work machine includes an electrical circuit (14) having a latching relay (36). The transmission (12) is shifted by electrical solenoids (28,30) which are activated by electrical current through the latching relay (36). Current to the latching relay (36) is provided from an electrical source (16) through a parking brake switch (18). When the parking brake is applied, the switch (18) is open and the latching relay (36) is de-activated. If the transmission (12) is left in a forward or reverse position (50,52) when the parking brake is applied, the machine will not move when the parking brake is released because the latching relay (36) is still de-activated. To activate the latching relay (36), the transmission shifting mechanism (20) must be moved to neutral (34). The transmission (12) can then be shifted into forward or reverse positions (50,52).