Power takeoffs are attachments in the power train for power to drive auxiliary accessories. They are attached to the transmission, auxiliary transmission, or transfer case. A common type of power takeoff is the single-gear, single-speed type shown in figure 13-15. The unit bolts to an opening provided in the side of the transmission case as shown in figure 13-12. The sliding gear of the power takeoff will then mesh with the transmission countershaft gear. The operator can move a shifter shaft control lever to slide the gear in and out

Figure 13-15.-Single-speed, single-gear, power takeoff.

of mesh with the countershaft gear. The spring-loaded ball holds the shifter shaft in position.

On some vehicles you will find power take-off units with gear arrangements that will give two speeds forward and one in reverse. Several forward speeds and a reverse gear arrangement are usually provided in power take-off units that operate winches and hoists. Their operation is about the same as that in the single-speed units.