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Our Mitsubishi reach truck will sometimes shut off. There is an error code 57 on the display. When this happens it won't reach in or out. Will also stop lift and lowering. We can still drive forward and reverse though. Have to turn the key off then on for the hydraulic functions to start working again. This problem happens when lowering and using the reach function at the same time. First the reach will stop then the code comes up. It does not always do it at the same fork height.

Most likely you have a broken wire on the pantagraph. There are two common locations that cause error code 57 on your Mitsubishi reach truck. See pics below.

One is on the very front bottom. There are 2 solenoids. The wires can get ripped off if they run something over or hit a dock plate. The other is on top behind a cover. This is where there is a lot of flexing and wires can get broken.