Pistol,

Looking at the CT's we have, they use a dash display that you can enter a password. Turn the key on and press the asterisk key four times. The top line should say enter password. Type in five 5's and press the pound key. This is the password that Hyster and Yale lifts come with from the factory. If you can access the dash, locate travel speed and adjust. If not, you can try to unplug the TISS and TOSS. I suspect you will end up with a code as it is setup with these sensors installed. Good Luck.