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I have a 20VP. One day the platform worked fine, now the…

Customer Question
I have a 20VP...

I have a 20VP. One day the platform worked fine, now the platform does not go up. Everything sounds the same and the lift will move. It's just the paltform

Mechanic's Assistant: What is the complete model and serial number of your machine?

JLG 20VP(###) ###-####

Mechanic's Assistant: Are you fixing this yourself? What have you tried so far?

I would like to. I have checked the fluid levels

Mechanic's Assistant: Anything else you want the industrial mechanic to know before I connect you?

I have a manual for it. I was hoping that there would be some basic things to check to see if I can fix it or if I should have it serviced by someone else

Submitted: 6 months ago.Category: Industrial Equipment
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Answered in 3 hours by:
8/4/2017
Mechanic: Curtis B., Technician replied 6 months ago
Curtis B.
Curtis B., Technician
Category: Industrial Equipment
Satisfied Customers: 29,652
Experience: Technican turned service manager on multiple lines of equipment used in industry.
Verified

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

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Mechanic: Curtis B., Technician replied 6 months ago

has an emergency lowering valve, has someone opened the valve? If valve is open, the system will not have pressure to raise the platform.

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Customer reply replied 6 months ago
I located the emergency lowering valve. It was tight. I loosened it and then re tightened it. No change. I suspect the dump valve may be stuck open but I don't know how to address this.
Mechanic: Curtis B., Technician replied 6 months ago

See page 2-13 in the parts manual link below. All the valves are in the power unit. You have outriggers, are they down? If outriggers are not set, lift will not raise.

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Customer reply replied 6 months ago
Page 2-13 is a parts list and there are no outriggers mentioned on that page. It does have a pothole detection system
Mechanic: Curtis B., Technician replied 6 months ago

Pothole detection is what I meant. I has no outriggers.

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Customer reply replied 6 months ago
There is nothing down. I look underneath the lift and it seems very normal. I have looked at the bubbles in the two levels and they are in the center.
Mechanic: Curtis B., Technician replied 6 months ago

Will the pothole bars move up or down? Are they making the switch close/open?

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Customer reply replied 6 months ago
The pothole bars are down which is what I assume is normal. Pushing them up or pulling them down makes no difference. I can see the plunger switches and they seem to be working.
Mechanic: Curtis B., Technician replied 6 months ago

Have you tested them with a meter?

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Customer reply replied 6 months ago
I have not. Do you know where I would make a connection to test? I'm thinking that getting under the unit will be very difficult
Mechanic: Curtis B., Technician replied 6 months ago

Is there a wiring diagram in the manual. I can't download it on this system. The wires from switches have to go to the control panel. locate the wires and test for continuity.

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Curtis B.
Curtis B.
Curtis B., Technician
Category: Industrial Equipment
Satisfied Customers: 29,652
29,652 Satisfied Customers
Experience: Technican turned service manager on multiple lines of equipment used in industry.

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