What does a power divider do on a semi truck?
A power divider (also known as an Inter-Axle Differential or IAD) is a separate differential box that locks the first and second differentials in a tandem truck into place. This allows all drive wheels to movie at the same speed.
Does 4H lock the differential?
Manual vs Automatic Locking Differential A manual differential lock means the differential is open by default. Once you manually engage the 4H mode then you close the center differential and power is split evenly across the 2 driveshafts. Automatic locking diff is also known as an LSD or Limited Slip Diff.
Why does a bogie truck need a power divider?
All bogie or tandem drive trucks require an inter-axle differential, also referred to as the Power Divider, which allows the forward and rear axle to turn independently of each other, which relieves stress on the axles and reduces tyre wear and allows the vehicle to corner more effectively.
When do I activate the power divider switch?
It is advisable to periodically activate the power divider switch, in the depot yard for instance, to make certain the valve operates freely, under normal conditions the switch should be in kept in the unlock position.
What causes a power divider to go bad?
Fault: Excessive wear in spider gears and their casing of the power divider (a.k.a third differential/center differential) spider gears. Symptoms: excessive diff temperature, excessive play in the diff, steel particles in the diff oil mesh filter. Cause: Drivers not engaging power divider lock on uneven ground. (This truck is a logger.) Loading…
How does the power divider work in a truck?
When the inter-axle is in the “engaged” position it causes the differential action of the power divider to act as a “through drive,” transmitting power equally between both the forward and rear axles, this in turn provides better traction for slippery surfaces. On some trucks, this switch has a guard to protect it from being accidentally activated.