confirm that the speed does change above and below staging
just had another thought
it is common for the roller on the accelerator linkage to fall off
i assume you have checked your pot voltage

I have had this problem multiple times. Most often it is height switch related. Have you followed the height switch cable all the way down to the connector, unplug it and use a paper clip to jumper it? I know you read power at dist board but I had one that had a bad spot in the cable and it was in the area where the cable would move when the mast was tilted. It would read good if the mast was in a spot where the cable was ok.

I also had one with a bad steer pot and the controller would slow down the motor speeds as well as several bad accel pots.
Posted 27 Aug 2021 11:18
Reply by 1CrownTech
Washington, United States

Excellent post from WA!

there should be at least one switch on the brake pedal, one will activate stop lights, other will reduce speed
check this switch on input and output of distribution board

I know there is a brake switch on the e-brake but don't know of any other brake switches. E-brake switch is working fine. This has been a problem for sometime I am not on this lift very often just was told about it.

check your brake switch
is this a new fault or always been there as it could be in the tune

I have had this problem multiple times. Most often it is height switch related. Have you followed the height switch cable all the way down to the connector, unplug it and use a paper clip to jumper it? I know you read power at dist board but I had one that had a bad spot in the cable and it was in the area where the cable would move when the mast was tilted. It would read good if the mast was in a spot where the cable was ok.

I also had one with a bad steer pot and the controller would slow down the motor speeds as well as several bad accel pots.