Kettle River, MN | championized - 1/22/2013 17:13
Of the trucks I have owned, most have been full lock, with a switch for each axle plus the power divider. One was a 3/4 lock, with only one locking axle, plus the PD. Another had both axle locks, but only one one lock switch. I had to add a second switch because you can't steer a semi in the mud with both axles locked and sometimes you can't keep moving if you unlock them both.
That makes sense, Ive been looking at truck paper wondering how some of these can be full lockers with one switch. Was it real hard to add the second switch?
Kentuck - 1/22/2013 17:18
Depends on the truck. On mine (2002 Mack) there are two switches. One for each axle with status lights for each. Also there is a Power Divder switch with a status light. This is the norm two switches if both axles lock and always a separate Power Divider switch. Many trucks were spec'ed with just one diff lock. That is the real difference in what is referred to as a "vocational" truck vs. a road truck. My word of caution: nothing can be turning when any of these switches are engaged. Best procedure is to stop, get out, run around the truck, get in and engage!! (smile). If anything is moving in most trucks something is going to break when you throw a switch. Drive straight just like your tractor with a diff lock.
I routinely engage the power divider when moving, just make sure there is absolutely no power going to the tires and nothing is spinning. Done this many different trucks with no ill results. I have not engaged the differential locks when moving.
The KW truck I drive in the winter has full lockers with a switch for each axle but usually only lock the PD and the front axle for three wheel drive and then the fourth no power set keeps me from sliding sideways (icy and sloped usually). |
Full locker question on semi
