Introduction
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| Illustration 1 | g00379660 |
Power shift transmission | |
The machine is equipped with a direct drive power shift transmission. The transmission has 16 forward speeds and nine reverse speeds. The power shift transmission allows shifting of the transmission while you are under full load. Therefore, the transfer of power to the belts is not interrupted.
Forward and reverse speeds are achieved by using a constant mesh of helical gears. The selection of power flow is made possible by nine multi-plate wet clutches that are engaged hydraulically by use of an electronic control system. A cutaway view of the mechanical aspect of the transmission is shown in Illustration 1.
The spacing of the gear ratios provide a 17 percent increase or the spacing of the gear ratios provide a 15 percent decrease in speed as the transmission shifts.
The transmission has the following standard features:
Speed Matching - Speed matching allows the transmission to automatically select a ratio in order to match the engine speed with the road speed.
Sequential Shifting - There are two methods for shifting the transmission sequentially. Speeds can be changed by shifting the transmission while the machine is in motion. Also, a speed can be preselected before the machine is in motion. Speeds can also be continuously selected by holding the transmission control lever to the left or right.
Programmable Upshift - The transmission can be programmed to upshift 1, 2, or 3 speeds when a rocker switch is activated.
Programmable Downshift - The transmission can be programmed to downshift 1, 2, or 3 speeds when a rocker switch is activated.
Autoshift Function - The autoshift function enables the transmission to automatically shift through speeds F10 through F16 when a switch is activated.
Shuttle Shift - The shuttle shift is used in order to quickly change the direction of travel without using the inching clutch control or the service brakes.
Note: An optional creeper transmission provides an additional 16 forward speeds and an additional nine reverse speeds. All of the creeper speeds are below 3.2 km/h (2.0 mph). When the creeper speed is engaged the speed reduction is 10.6:1.
Transmission Housing
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| Illustration 2 | g00379838 |
Sections of the transmission (1) Front housing (2) Center housing (3) Rear housing | |
The transmission housing consists of three major parts: front housing (1), center housing (2) and rear housing (3). Access to the internal components is only possible by separating the rear housing from the center housing. Next, remove the center housing from the front housing.
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| Illustration 3 | g00379844 |
Internal components of the transmission (4) Speed clutches (5) Direction clutches | |
Front housing (1) contains speed clutches (4) that provide the first nine speeds in each range. In addition, front housing (1) provides support for the front bearings of speed clutches (4) .
Center housing (2) provides support for the rear bearings of speed clutches (4). The transmission hydraulic control is also attached to center housing (2). Also, center housing (2) distributes oil through the circuits to the speed clutches and direction clutches. All circuits are drilled and all circuits are routed to the components throughout the housings. Center housing (2) supports the rear bearings of speed clutches (4). The front bearings of direction clutches (5) are supported by center housing (2) .
Rear housing (3) contains direction clutches (5) which provide two forward ranges and the reverse range. Also, rear housing (3) provides support for the rear bearings of direction clutches (5) .
The transmission housing and the center housing from the rear axle and the extension housing form a common oil sump.