Please help, Hyster E30BS Serial # B114V02453Y with EV-1 controller and Monotorl, 1A contactor is not closing in reverse, working fine in forward mode. Slowly pressing the reverse will move the forklift but ones you press far enough to activate the 1A switch, forklift starts hopping and jerking. I checked the speed pot and 1A switch which are fine, installed new contact kit to F, R, 1A and pump contactor while in there with no luck. It seems like this unit came without the accelerator control board because I can't locate it on control panel. Only think I can think of is the Coil driver module 271897 GE IC3645CPM1RDA2 for 1A but have no idea what components are in it or how to check one for functionality.
Thanks in advance for your time, Bernard
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