Do you have a tachometer for diesel ??? ( laser tacho.) If you do not PLS get one or call the dealer. It will be cheaper to do that them to pay the damaged from an over-reving diesel.

thanks for your help diesel.

Is you know how to adjust the air governor it is easy to do. But if you never did it it can be very tricky and long to explain ober e-mail's your best think to do since you want fix your lift is to invest in a repair manuel. For adjusting the governor you need the 4Y engine repair manuel.
There a two adjustment on the governor fast idle 2600 rpm and loaded 2400 rpm. The round **** is for the 2600 rpm and the screw is for the 2400 rpm. good luck

the old operations manager turned it down, and i am not sure how. i would be very suprised if he spent money and changed teh gear ratios, he about shat on himself when he thought about buying tires for the lifts. i am sure that it was some sort of governor that was reduced, but i just don't know how to adjust it, and being as though it is not my personal property, i don't want to just start tinkering with it. mechanically, the lift is fine, it has a smooth idle, the mast functions just fine, everything about the lift is great except for it's lower speed.

is it possible to raise the governor on it?

Ok are you sure that the Toyota is not going to it max speed???? If the speed was reduce do you know who did it and how ??? I will be very surprise if they changed the gear ratio so they must of had the governor reduced or it has a factory speed reducer or a mechanical problem

i think somehow the lift was limited to about 5mph. rough guess. getting it back up to speed with the rest of them was my concern.

interestingly enough, now that i really think about it though, there is one lift at work that is a lot faster than every other one. when the rest of the lifts "top out" it seems like it hits another gear or something. crazyness.

There is fast and to fast. To fast is when the operator is wasting time picking up a load he lost or spending money on damaged loads.
As for your lift I presume it is a propane lift. You first have to make sure that the engine in performing to spec. It should have a fast idle of 2500/2600 rpm and drop 200/300 rpm in tilt relief. If the engine does not performe on the hydrolics it will never drive fast. If it does ok on the hydrolics then you may have a torque convertor or a trany problem.
If the spec of your lift is 10 mph it should go that fast or do you want to go faster then the spec's ???

let me clarify, i am not saying that i want to raise the governor on all of the lifts up to where they go 20 mph, but instead, i am trying to improve productivity at my workplace by making it possible for one employee, not even me, to work faster. in contrast for your statement that "it is not because a lift is faster that the job is done faster", it actually is. if it takes the guy twice as long to drive down the dock to pick up a piece of frieght, then it takes him twice as long to do that particular action, correct? i don't see how that could be debated.

per the toyota website, the speed on the lift is supposed to be up to 10.9mph, but on the lift i am inquiring about adjusting, one can walk faster. i think that is a big enough difference to try and get it adjusted.

as for calling the dealer, let me explain my thoughts on that, i and my boss both work on all of our cars ourselves, so i know that this would not be hard to do, if only i knew how. i am on a lot of online automotive sites, and there is a great deal of camaraderie there, with everyone willing to help each other out. as you see in this thread (forkliftaction.com/forum/discussion_82.htm) there is a hint of discussion about sharing information, and about helping each other out, it also goes on to say that these forums are the best spot for it.

having said that, if anyone here knows how to do this, and is willing to help someone out, please let me know. thanks.

First of all you have to keep in mind that speed kills and cost a lot of $$$$$$$$$$$$$$$ in damage to the lift,the load and your building. It's not because a lift is faster that the job is done faster.
If you really want to do it and you Toyota has an original speed limiter it should take your dealer 5 minutes to re-adjust it.