Discussion:
SJIII 3219 steering problems

I have a Skyjack SJIII 3219 scissor lift. The problem I am having is it doesn't steer while the lift is in motion forward/reverse. If it does steer it's very slowly. You have to play with the joystick to make this happen. Do you think the joystick is bad, but while not in motion the steering works, forward/reverse is fine. Thank you for your help.
  • Posted 26 Jul 2018 09:41
  • Discussion started by pukas84
  • Hawaii, United States
Showing items 1 - 14 of 14 results.
any update on this topic?
i have same issue on my lift
didnt test pressure yet, but hydraulic steer cylinders were recently rebuilt.
i suspect it is either counter balance valve or a diode..
  • Posted 2 Jan 2022 10:53
  • Reply by johnvestal
  • California, United States
I totally agree, Buy from Skyjack. In fact, Sky jack is usually cheaper than aftermarket. And, quality. Same with Genie, they are always cheapest source of parts, consistently. They offer all manuals online, free. They give support. Why mess around with cheaply made aftermarket parts that will fail soon after. The cheap switches and controls actually cost way way more when they fail. Labor and lost time to re-fix bad quality parts.
  • Posted 22 Mar 2020 01:33
  • Reply by EasiTek
  • Ontario, Canada
he would be better off buying parts from skyjack
totally NOT recommended to buy aftermarket parts for these machines
  • Posted 18 Mar 2020 14:32
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
If the joystick is bad,you can purchase from me.I am the joystick manufacturer from China.I can offer you best quality and price.The delivery time also can short in 2 weeks.Please feel free to contact me.E-catalog and sample is available.
  • Posted 18 Mar 2020 12:41
  • Reply by Winky
  • China
Better product,better life
I found this thread online because I was having a similar issue. I ended up getting on the phone with Skyjack and told them the issue I was having (unit would steer fine on steer only function). If trying to steer while driving, the front wheels would only turn about 3 degrees.

Plug your test gauge into the test port on manifold. Drive the machine and observe the pressure. On a firm level surface you should have 500psi. If its considerably lower, you have a bad counterbalance valve, which regulates your pressure. If it stays the same, activate steer while driving and observe the pressure guage. If it drops considerably while steering, your steer cylinder is bypassing; If pressure stays the same, your front steer spindles are bound and drive pressure (500psi) is not enough to steer them as opposed to standby pressure (2400psi) <- this was my issue.

Hope this helps.
  • Posted 11 Mar 2020 08:06
  • Reply by Brently_Byers
  • Mississippi, United States
ok using the serial number you provided the test proceedure is basically the same except you use the lift function on the ground control, raise the unit to full height and take a pressure reading and then set the pressure according to the data on the dataplate on the lift. The dataplate/sticker should have the hydraulic pressure listed on it.
if you cannot get it to achieve the correct pressure then you may have a faulty relief valve or a worn out pump or a bad steer cylinder packing.
checking the steer cylinders is fairly straight forward, get a bucket to catch the fluid, steer it to one side, then remove the line from the one side of the closed end of the cylinder and activate the steer direction and check for any bypass fluid, there shouldn't be much coming past the packing. if you get alot of flow with any pressure behind it then its bypassing, bad packing. You can try to repack the cylinder but check the cost of just replacing it, it might be more cost effective to just order a new cylinder. (replace both cylinders, if one is worn out the chances are the other one is too).
  • Posted 30 Aug 2018 22:41
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
Serial number is 22017476
  • Posted 30 Aug 2018 11:50
  • Reply by pukas84
  • Hawaii, United States
first... a serial number of unit might help get the right service manual. But with that said you need to get a 3000psi hydraulic test guage.
Look on the hydraulic manifold block, it should have a quick disconnect test port to connect a guage to. Also locate the system pressure relief valve at R1 on manifold.
Now with guage in place, press and hold right steer and let system stall out, take a reading on guage and then release steer button. The pressure should read the rated relief pressure for this unit which should be around 2150 psi. If you do not get this pressure reading try and adjust pressure on relief valve to get this pressure reading.
If you DO have correct reading then i would start looking for a bad steer control valve or a bad cylinder, worn packing causing a bypass in cylinder might be your problem or possibly a faulty steering valve in manifold block.

I'm basing my information on older machines ( i used the oldest serial number range in skyjacks manual list ) Newer machines may be different. You can go to skyjack. com and find your manual as well, they are open to the public ;o)

So whats that serial number?
  • Posted 29 Aug 2018 22:09
  • Reply by swoop223
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
check your diodes one is loose or bad.
  • Posted 29 Aug 2018 14:09
  • Reply by JKPAINTER
  • Ontario, Canada
mrbob I see you are in hawaii, where are you located?
  • Posted 29 Aug 2018 11:21
  • Reply by pukas84
  • Hawaii, United States
Well by golly, you're issue sounds exactly like every old SJ3219 I ever worked on!
Don't waste your time. Drive it, does it steer? Bob's you're uncle ;)
  • Posted 21 Aug 2018 10:43
  • Reply by EasiTek
  • Ontario, Canada
You need to run a pressure test. The steering does not require a lot of flow but it does require quite high pressure. You might have a pump that is getting weak.
  • Posted 21 Aug 2018 06:26
  • Reply by BREWSKI
  • Nebraska, United States
I thought it was battery. I replaced all four batteries with new ones.
  • Posted 21 Aug 2018 04:59
  • Reply by pukas84
  • Hawaii, United States
What is your battery voltage when doing this.
  • Posted 17 Aug 2018 11:24
  • Reply by mrbob
  • Hawaii, United States

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