We Have A Older Yale MPB040 Pallet Jack ~ 97' Vintage
No Motor Controller Just A Large Resistor / Transformer ~ 18" Long On The Left Hand Side
Unit Operates Fine In Forward, will go in All Speeds Starts, Stops Etc
If You Hit The Estop Button Or Try Going in reverse The Unit Takes Off and Will Not Respond To The Hand Controls You Either Have To Release The Handle Or Turn The Unit Off With The Key.
We Tried Replacing The Switch For fwd & Reverse In The Handle No Avail
We Tried Replacing The Little Relay By The Contacts No Help Either
We Swapped Wires On The Contact and Then The Opposite Happens Instead Of Reverse Its Stuck In Forward.
Thanks For The Help