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A question for hydraulic experts.
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Posted 3/26/2020 19:53 (#8141431)
Subject: A question for hydraulic experts.

I have an old JJG man-lift from the 70’s. All of a sudden it won’t swing to the right. I can still feather the hydraulic speed for the swing but it will only swing to the left no matter which way I push the joystick. Can anyone explain how the electrical system for these proportional hydraulics work and where to start looking? I have a service manual with the electrical schematics so I will try to post pics as well as explanations.

(F5BC2311-0848-4CD9-9CF3-6FED8F6A3391 (full).jpeg)

(B1349E1A-B097-4ED5-861A-B2D32370408E (full).jpeg)

Attachments F5BC2311-0848-4CD9-9CF3-6FED8F6A3391 (full).jpeg (113KB - 6 downloads)
Attachments B1349E1A-B097-4ED5-861A-B2D32370408E (full).jpeg (148KB - 4 downloads)
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