I bought a used 4430 tractor with power shift. When I worked it pretty hard the transmission would heat up. I put it in the shop where the.
How does Automatic Powershift (APS) work?SymptomsAutomatic Powershift (APS) can be activated by pressing the 'set' switch on the right hand console.Solution StepsWhat does APS do?APS shifts the transmission to maintain optimum engine speed. The controller will determine the shift points based on throttle setting, engine speed, and engine load. Under heavy load the transmission will downshift as many gears as necessary. In transport or light applications a change in the throttle position allows a maximum downshift or upshift of three gears.How do I use APS?Set throttle to full engine rpm and select the maximum forward gear.
Now press the APS Set switch and the APS indicator will light on the right hand console. APS will now automatically downshift and upshift as engine rpm or load changes.
A manual shift will cancel APS, but pushing the resume rocker will restore control of shifting to APS.Tip: Prior to shifting to the maximum forward gear, the APS will continue monitoring the throttle setting, engine speed, and engine load. This can delay shifting since APS is ensuring that upshifts are made under reasonable loads for the next gear.
Automatic PowerShift transmissionAutomatic PowerShift transmissionAutomatic PowerShift transmissionThe 8R and 8RT Series Tractors utilize a field-proven, 16-speed automatic PowerShift transmission (PST) which is available on all models except the 8360R and 8360RT models.First introduced in 1994, the automatic PowerShift transmission delivers the strength to handle sudden, high-torque power loads while maintaining responsive, application-based shifting.PowerShift controlsThe automatic PowerShift transmission uses a single lever gear selector conveniently located on the CommandARMâ„¢. It provides full powershifts for on-the-go shifting; resulting in no need to stop or clutch when changing gears or shuttle shifting between forward and reverse.