Cat NOR30
2ML-03026
Orderpicker
2500 hours
I have a reoccuring code 81 during opperation, intermittantly, at times, consecutively, other times, days without a fault(almost 6months now)
I have replaced the Lift/Lwr pot, twice and re learned (aftermarket parts) and this resolved the issue for a short period. After tracing, checking and testing, I installed an OEM lift/lwr pot, performed learn, and the fault was resolved, so I thought, 3 months later same issue.
I have inspected and marked all over mast cables at fault height(fault occurs when lowering) it faults at a height of 50 to 97 inches, the mast cables look fine but can be decieving.
When code 81 occurs, a key off/on cycle will bring unit back into service untill the next fault, (as soon as lowered, or two days later). The lift/lwr pot is within the spec range, voltage, at nutral, lift max and lwr max, so I am leaning towards the over mast cable. But this is an expensive leap of faith, (I have attempeted to measure a voltage drop across the mast cable at the time of fault, but it will not cooperate and fault for me)
Any ideas that I am not thinking about? Or help push me off the edge to replace the over mast cable.