Suddenly I can not get my forklift to go into FOR/ REV Let me back up. If I turn of key (reset PMT) turn back on put in FOR I can get it to go. After a couple of rounds of FOR/ stop /FOR it will no longer go FOR. If I turn off key most times it will go FOR again only to go through the same deal. Once in a rare while it will go into REV. Usually on one time. ie if I go into FOR and then back to REV nothing. Sometimes if reset it tries to go into REV ie. contact moves a little. If I push manually at that point it will engage. usually only one cycle though then contact will not move at all and even pushing contact will not engage.
I have 37.6 V across Battery even though it is 10 years or so old. 2rec and 5 rec were replaced a while ago (3 months) due to an unrelated problem ie the surge/ stall scenario. Main card was replaced a month before that to solve an intermittent problem where it would just stop dead in its tracks problem.
I have 37 V at contacts when switch is on. I have 37 V at FOR/REV switch terminals except one that is 10V.. I've cleaned contacts on FOR/REV contactors. Throttle potentiometer seems to work properly (speed increase smoothly till 1A kicks in). All hydraulics work properly. seat switch / brake switches all work as intended. Handbrake switch is bypassed. Si thats most of what I know. Forklift repair guys now just says its the battery. Don't know as I have 37 V (assume all cells are good then??)
Love any input. Key I think is the sudden nature of the problem. Last week drove all day no problem. Next day nothing