Posted by JD Seller on September 18, 2016 at 08:25:58 from (208.126.198.123):
I have had a fork truck at the shop for years. It is just hand all around. The latest one is 15 years old but has electric over hydraulic controls for the mast/forks.
So last week it would not lower the forks, only raise them. We looked at it some and figured it was a circuit board. There is a local fellow that used to be a full time fork lift mechanic. I get him for the deeper electrical stuff.
He came out yesterday and looked it over. Well we need a new harness. It was burnt in several places. HE said it was from welding on the fork truck. My son told him we did not weld anything on the fork truck. WRONG. HE was thinking of just the fork truck meaning like repairing it. That we have not done. Now stuff we have lifted with the fork truck we weld on all of the time. NEVER even though of it going back to the fork truck through the forks/mast.
I also got to thinking I weld things that are chained to the loader on the tractor too. That could easily go back to the tractor too. The JD 6400 has computers on it. They could get zapped too.
The repair guy told us to disconnect the battery if we were going to weld around the lift. I know that would never get done as the battery is very hard to get to on this lift. Then I got to thinking about just putting a disconnect switch in the ground cable to the battery.
A disconnect switch should protect the lifts electrical systems from the welder by breaking the ground when the disconnect is used????
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