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Curtis B.
Curtis B., Technician
Category: Industrial Equipment
Satisfied Customers: 658
Experience:  Technican turned service manager on multiple lines of equipment used in industry.
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I have a 40 rts scissor lift with out riggers that will not

Customer Question

I have a 40 rts scissor lift with out riggers that will not drive.
All other functions work. We have been using it daily with no signs of a problem.
Submitted: 10 months ago.
Category: Industrial Equipment
Expert:  Bradley Martin replied 10 months ago.

What is the make and model of this lift?

Customer: replied 10 months ago.
Jlg 40RTS
It is a 2002
Customer: replied 10 months ago.
The hydraulics load up but no drive wheel movement.
Expert:  Bradley Martin replied 10 months ago.

Sounds like the parking brake is not releasing Have you checked the solenoids?

Customer: replied 10 months ago.
No. Where are they located?
Expert:  Bradley Martin replied 10 months ago.

By the lower controls inside the door by the lower controls

Customer: replied 10 months ago.
We did unlock the hubs on Friday.
What should I check. ?
Customer: replied 10 months ago.
Are they gold? Four in a vertical row with push rods coming out?
Expert:  Bradley Martin replied 10 months ago.

Check the connection to the coils on top of the drive motor pump should two coils that controls the drive and the parking brake the pump is mounted on the engine

Customer: replied 10 months ago.
I think I know which valves you mean.
Check the electrical connection?
Expert:  Bradley Martin replied 10 months ago.

Ok let me know what you find out

Customer: replied 10 months ago.
What do you want me to check?
Expert:  Bradley Martin replied 10 months ago.

Check the connections on the solenoids you may also have a bad solenoid you can take a meter and ohm them out to check for continuity

Customer: replied 10 months ago.
Okay. If the meter doesn't sound off then is this a bad solenoid?
Expert:  Bradley Martin replied 10 months ago.

Correct

Customer: replied 10 months ago.
Is this to be done with all the connections on the solenoid?
Expert:  Bradley Martin replied 10 months ago.

I would disconnect the harness from the solenoid and just test the solenoid itself

Customer: replied 10 months ago.
Okay. The lift is 20 min away.
I will let you know what I find.
Expert:  Bradley Martin replied 10 months ago.

Ok

Customer: replied 10 months ago.
I tested the solenoids and they tested ok.The meter sounded out.
Expert:  Bradley Martin replied 10 months ago.

Ok Can you engage one wheel at a time and see if it is a drive motor or hub issue

Customer: replied 10 months ago.
How would I engage a wheel?
Expert:  Bradley Martin replied 10 months ago.

Turn the little cap on the hubs around one at a time

Customer: replied 10 months ago.
We have all of them turned around.
This is one of the first things we did on Friday.
Expert:  Bradley Martin replied 10 months ago.

Can you turn one back around one at a time and see if one off the wheels is not driving and maybe stuck drive hub

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