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The power divider is essentially a differential. In the unlocked position, it will provide power to both axles.. however, as torque will follow the path of least resistance, if you were to lift a single one of those wheels off the ground, the vehicle would not move. The power divider locks causes the power divider to make the outputs to both axles rotate at the same speed... in normal, on-road operation, this should remain unlocked, as differences in tire wear between the two axles can cause damage to the driveline.
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What is 6x4 drive?
This is typical for tandem axle trucks. Two axles are live axles, and the driveshaft goes into a power divider. The power divider supplies power to both axles.
What is drive axle on a tandem rear end?
They both are. The driveshaft goes to a differential (the power divider), which supplies power equally to both axles.
What is the difference between single and double axle semi trucks?
One has a single drive axle, and the other has two. They're rated to haul different weights, and the tandem axle trucks usually have a twin screw system, where a power divider transfers power to both axles, whereas the single axle won't have the power divider.
What axle drives a tandem truck?
There are two configurations for a tandem truck... the first - more common in Europe - is known as "single screw". The driveshaft goes to the differential of one axle, and that's the only live axle. In cases such as this, the additional axle is typically a lift axle. In N. America, tandem trucks normally use a twin screw configuration, where the driveshaft goes to a power divider... that power divider is essentially a differential, and has outputs going to both axles... ergo, both axles have power supplied to them at all times. A lot of people think that the power divider lock engages one of the axles.. this is not true.. it simply locks the outputs so that they always rotate at a matching speed.
Does the front differential of a tandem axle drive all the time?
Yes. So does the rear differential. The power divider distributes power to both axles at all times while the vehicle is in motion.
What axle is the drive axle on a triaxle?
A tri-axle has two live axles and a lift axle.. if it's located in front of the drive axles, it's known as a pusher... if it's located behind the drive axles, it's known as a tag axle. With a tandem axle setup (which is what tri-axles, quad axles, etc. are, albeit with the addition of dead axles), the driveshaft runs from the transmission output to the power divider. The power divider is a differential which transmits power evenly to both live axles.
What is a Day cab twin screw?
"Day cab" refers to a truck which does not have an attached sleeper berth. "Twin screw"... on a single axle truck or a tandem axle with only one live axle (more common in Europe than the US), the driveshaft goes from the transmission output straight to the live axle differential. That's what's colloquially known as single screw. Most tandem axle trucks have both drive axles as live axles, and the driveshaft goes from the transmission output to the power divider (also known as interaxle differential), which in itself is a differential. Power is distributed from the power divider evenly to both axles in normal operation. This is what's known as a twin screw system.
What axle pulls on tandem trucks?
They both do. With the differentials unlocked and the truck in gear, if you raised just one of those wheels off the ground, all the torque would transfer to that wheel (which would be the path of least resistance), and the truck would be going nowhere.. that wheel would just be spinning in the air. The power divider lock doesn't engage the second axle - the second axle is already engaged. The power divider lock simple ensures that the driveshaft to the rear axle continues to rotate at the same speed at the driveshaft going to to forward drive axle.
What is a power divider in a truck when and how it should be used?
On a tandem truck, you have two configurations - single screw, where the driveshaft goes directly from the transmission output directly to the differential of a live axle... the other axle will be a dead axle, and does not propel the vehicle. The other configuration is known as twin screw, and this is what a 6x4 truck is. Both axles are live axles, and the driveshaft goes from the transmission output to the power divider input. The power divider is essentially a differential, which ensures that power is distributed evenly to both output shafts (one going to each axle differential). It's always in use. As for the lock, you use it as little as possible. Icy conditions, off-road use, or times when an axle is lifted off the ground would typically be when you'd use the PDL.
In a tandem axle which axle powers the vehicle?
They both do. The driveshaft turns a differential which distributes power to both axles.
Is the power divider and inter axle lock the same?
Power divider and interaxle differential are two names used to describe the same thing. The lock simply ensure that both outputs from the power divider always rotate at the same speed.
How do you break a power divider in a differential?
do not ingage inter axle lock when spinning wheels.
