CAT TA22 Powershift Transmission Operation
Transmission Description
The transmission is a 16 forward and 4 reverse speed constant mesh countershaft design.. It accomplished this by utilizing five shafts: input, intermediate, planetary output, transfer gear output, and reverse.. It involves 7 rotating clutch groups (8 with optional PTO) and 2 stationary clutch groups..
The transmission clutches are controlled by the transmission control module and the transmission shifts in response to operator inputs (direction selector position, upshift/downshift requests, inching pedal position, autoshift mode, etc).. There are two different modes of normal transmission operation: manual shift mode and autoshift mode..
Transmission Operation
The TA22 Powershift transmission is operated by a single control lever (1).. Because the transmission has only one control lever, it is extremely easy to use..
NOTE: The control lever is equipped with a neutral lock button (2). The control lever may only be moved to the forward or reverse positions if the neutral lock button on the control lever knob is depressed. Neutral may be selected without depressing the neutral lock button.
The control lever is used to select forward or reverse travel and to change transmission speeds.. Move the lever forward for forward travel and rearward for reverse travel..
IMPORTANT: Shifting the transmission at low throttle setting and a light draft load will extend clutch life.
The control lever is also used to make instantaneous upward or downward gear ratio changes.. Nudge the lever to the right for upward changes and to the left for downward changes.. (In this context, “nudge” means move the lever and then release..)
Consecutive gear ratio changes may be made, either by nudging the lever several times or by holding the lever to the left or right and allowing the transmission to shift through the gear ratios automatically..
NOTE: Reverse gears are displayed as Rl and R4.
1
2
Transmission Operation
F 
M
R
CRUISE | N |
| |
OFF | (SET) |
435/485/535