Filter
Top Products
435/485/535
3-61
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.
Section 3 - Operation
Transmission Operation
F3-65
(SET)
OFF
CRUISE
N
F
M
R
2
1