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Bradley Martin
Bradley Martin,
Category: Agriculture and Farm Equipment
Satisfied Customers: 174
Experience:  Field Technician at Thompson Tractor Company
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Mine name is and I Run equipment repair nds in Syracuse New

Customer Question

Hi, mine name is ***** ***** I Run equipment repair for Crouse hinds in Syracuse New York. I Have a sky jack Scissors lift model 3220 serial number 609364. The machine will not drive and steer at the same time unless I jack the front of machine and take pressure off front steer wheels. Also steers fine when standing still. I figured maybe it had low pressure so I replace Pump but no change. Also when it's in drive I did test for power to steer solenoids and seems to be fine. Any ideas??
Submitted: 9 months ago.
Category: Agriculture and Farm Equipment
Expert:  Bradley Martin replied 9 months ago.

Hello my name is***** will try and help you with this. Is there any fault codes that come up on the display?

Expert:  Bradley Martin replied 9 months ago.

LED lights should be blinking a code if it has one

Expert:  Bradley Martin replied 9 months ago.

LED light should be on lower controls panel bottom right hand corner

Customer: replied 9 months ago.
This unit doestrogen not have led trouble code system. Older model
Expert:  Bradley Martin replied 9 months ago.

Ok does it raise and lower ok?

Customer: replied 9 months ago.
Expert:  Bradley Martin replied 9 months ago.

ok let me locate an manual I will get back with you

Customer: replied 9 months ago.
Thanks
Expert:  Bradley Martin replied 9 months ago.

Have you by chance took the steer valve out and looked at it made sure it was pulling in and out all the way and had no trash in it?

Customer: replied 9 months ago.
even switched with drive solenoid to see if there was any changes. As they are the same
Expert:  Bradley Martin replied 9 months ago.

Have you tried adjusting the pressure relief valve?

Customer: replied 9 months ago.
There are 2 relief valves that I see lower right under steering valve I turned all the way in then all the way out with no change but I'll try again. The one at the top I believe is for the lowering
Expert:  Bradley Martin replied 9 months ago.

Does it drive fine when just driving no steering?

Customer: replied 9 months ago.
Drives fine with no steering and steers fine with no driving. Unscrewed relief valve all the way nothing moves all way in drives but doesn't steer
Expert:  Bradley Martin replied 9 months ago.

Ok does it have two steer cylinders or just one?

Customer: replied 9 months ago.
One
Expert:  Bradley Martin replied 9 months ago.

I would suspect the steer cylinder to be at fault you probably have fluid bypassing the piston inside the cylinder putting it in a bind

Customer: replied 9 months ago.
Would that allow it to work when the drive motor isn't on.
Expert:  Bradley Martin replied 9 months ago.

No it would not does it do this all the time or just when it has been worked a little while?

Customer: replied 9 months ago.
The steering works fine till the drive motors are going
Expert:  Bradley Martin replied 9 months ago.

Is your manifold block aluminum?

Customer: replied 9 months ago.
Expert:  Bradley Martin replied 9 months ago.

more than likely it has a hairline crack inside of it allowing pressures to fluctuate when driving and steering at the same time.

Expert:  Bradley Martin replied 9 months ago.

are you going to replace the manifold?

Customer: replied 9 months ago.
but it's coming from the factory. Said about 2 weeks
Expert:  Bradley Martin replied 9 months ago.

Ok let me know what happens. That is the only thing I can think of that is wrong. Do you agree? I have ran into to it before but it is rare.

Customer: replied 9 months ago.
I can't see where else I'd be loosing pressure we will see. Let you know when I've got done
Expert:  Bradley Martin replied 9 months ago.

ok sounds good.

Expert:  Bradley Martin replied 9 months ago.

Can you rate me? I dont know if they will keep the question open that long you can message me back when you complete the job so we can open the question back up with no charge