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Curtis B.
Curtis B., Technician
Category: Industrial Equipment
Satisfied Customers: 628
Experience:  Technican turned service manager on multiple lines of equipment used in industry.
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I have a JLG 600AJ serial# 300062841 When in drive gh it

Customer Question

I have a JLG 600AJ serial####-##-####When in drive high it moves about 6 inches and then it just stops and in low torque it will move but as soon as 1 tire hits a door way or any kind of a ground difference it locks down,if you move it in the opposite direction it will move about the same and you can rock it back and forth about 6 inches each way. I lifted it off the ground and it works fine. I have replace the collector seals.
Submitted: 7 months ago.
Category: Industrial Equipment
Expert:  Bradley Martin replied 7 months ago.

Is this lift electric or gas powered?

Customer: replied 7 months ago.
Diesel
Expert:  Bradley Martin replied 7 months ago.

Have you done any pressure checks at the drive motor? Do you have any fault codes?

Customer: replied 7 months ago.
All pressures are good no fault codes
Expert:  Bradley Martin replied 7 months ago.

It sounds like one of the drive motors is bad when it stops does one of the wheels try to move does it bog the engine down

Customer: replied 7 months ago.
That's what's odd the engine never bogs at all. It drives on smooth services but if it has a bump or a small lip on a slab it just stops.
Expert:  Bradley Martin replied 7 months ago.

Have you tried disengaging one wheel at a time and see if it continues this does your model have the torque hubs on the drive wheels

Expert:  Bradley Martin replied 7 months ago.

Does all other functions operate at normal speed?

Expert:  Bradley Martin replied 7 months ago.

Have you tried the platform drive override switch when it stops could be a issue with a switch causing it to stop

Customer: replied 7 months ago.
I tried that but no difference and everything else works great
Customer: replied 7 months ago.
Where's the override?
Expert:  Bradley Martin replied 7 months ago.

Right hand top corner should have a green sticker above it