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Curtis B.
Curtis B., Technician
Category: Industrial Equipment
Satisfied Customers: 28909
Experience:  Technican turned service manager on multiple lines of equipment used in industry.
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I have a jlg 600s will drive forward but not reverse, 1998

Customer Question

i have a jlg 600s will drive forward but not reverse
JA: What is the complete model and serial number of your machine?
Customer: 1998 600s serial is 064236(###) ###-####JA: Are you fixing this yourself? What have you tried so far?
Customer: hoping to yes and iv replaced the drive contol in the basket but not to sure where to go from here
JA: Anything else you want the industrial mechanic to know before I connect you?
Customer: nope
Submitted: 1 month ago.
Category: Industrial Equipment
Expert:  Curtis B. replied 1 month ago.

Hello! Let's see if we can can work together to get to the root of your question!

Expert:  Curtis B. replied 1 month ago.

What happens if you rotate the boom 180 degrees, and try to drive.

Customer: replied 1 month ago.
it does the same thing when it gets warm it works of and on but not 100%
Expert:  Curtis B. replied 1 month ago.

Swap the forward/reverse valves in the main control valve . Likely the reverse valve is not opening when it should. Can be the coil, but more likely the internal valve.