Hello, I am new to this forum, but figured this was the right place to ask questions about older forklift issues. We just recently purchased an old Clark EC40E forklift and all of the functions work accordingly..Except reverse. Forwards always works without a hiccup, however, sometimes in reverse it will lurch backwards and pop the breaker on the dash. I know the points are making contact because I can hear them make contact before I start to drive in forwards or reverse. If I am driving forwards and put it in reverse while still barely rolling it doesn't do this, but from a dead stop under light application of the throttle, it does it almost every time.. very intermittent. I was wondering could anyone point me in the correct direction as to where to look or what commonly goes wrong with these machines. We had a local forklift repair shop come out and look at it and the guy had never even seen one of these machines before (never a good sign) and didn't have a clue what was wrong with it.

Thank you in advance.

Billy