727 46RH conversion coming
Control box is wired and mounted. Notice the vacuum interrupt switch has the normally open contact wired to the pressure switch. This allows the high vacuum to maintain the switch in the closed position until the vacuum drops, as on harder acceleration to pass, allowing the circuit to open and OD/LU to drop out.
Both the OD and LU timed relays are set at 10 seconds each. This eliminates flutter on engagement if the speed/pressure varies around the set pressure. OD comes in 10 seconds after the set speed of 45mph pressure switch contact closes. LU comes in 10 seconds after OD is activated.
Control box is wired and mounted. Notice the vacuum interrupt switch has the normally open contact wired to the pressure switch. This allows the high vacuum to maintain the switch in the closed position until the vacuum drops, as on harder acceleration to pass, allowing the circuit to open and OD/LU to drop out.
Both the OD and LU timed relays are set at 10 seconds each. This eliminates flutter on engagement if the speed/pressure varies around the set pressure. OD comes in 10 seconds after the set speed of 45mph pressure switch contact closes. LU comes in 10 seconds after OD is activated.