Hi Kristjan.

Sounds like you are right about the accelerator unit. Speed control is dependant on a small magnet that moved with the pedal operation. The magnet effects the pulsing and moving it away from the Armature feed cable that you see on top of the unit, allows ther pulse circuit to increase pulses thus increasing speed. The magnetic influence is measured by the Transductor, the red plastic 'module fitted to the accelerator. It has the Armature cable clamped to it. Any difference in magnetic flux between the cable and the magnet is measured and pulses occur as required. Alter the balance and the pulsing is either increased or decreased. It sounds like the fixed magnet has broken out of its clamp. That is not uncommon. Remove the tin plate covering the magnet housing and you will see the two clamp halves holding the magnet. Usually, one half cracks and the magnet sticks to the tin plate.!! Easy to see and do. I can give you the Part numbers etc if that is what is wrong. I hold stock of anything you might need if you are stuck. Let me know. Caution.!! When you take the tin plate off the back, make sure you keep your eye on the magnet and which way around it is facing. There SHOULD be a tiny blue dot or some other mark on one side of the magnet. This side faces away from the tin cover when assembled in the clamps. There is a one inch hole in the front face of the unit with a stainless steel press in cover. Inside is an adjusting screw and locknut. When you have fitted the magnet and clamped it up, you can adjust the point where pulsing first occurs with this adjuster. Truck wheel off the floor, Direction contactor in, adjust screw in or out until you hear pulsing. **** out will increase the pulse rate. Once the wheel is turning very slowly, lock off screw. You might need to put wheel back on the floor and adjust for final trim as some operators like a grater or smaller 'dead' band between contactor coming in and the start of the truck to move. Hoppe this is what IS wrong. If all looks well in there though, let me know and I will suggest more. can (and will) send some info when i get a cahnce. (In the middle of a job at the moment. Let me know.. and good luck. Cheers baz cleverley\