Low power and no high speed travel - Maintenance & Troubleshooting discussion in Forkliftaction's forums

Discussion:
Low power and no high speed travel

Skyjack SJII3220

My lift recently started having issues. It's has very little power when moving both forwards and backwards and with the platform lowered it will not go into high speed travel/2nd gear, whatever it may be called. The batteries are pretty new so I'm sure that's not the issue. It also worth noting that other functions such as steering, platform raise and platform extension seem 100% with no sign of reduced power. Any ideas would be greatly appreciated.

Posted 28 Oct 2022 05:29
By Steve_Ott
joined 28 Oct'22 - 1 message
Pennsylvania, United States

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From the parts/service literature from their website

-Work Platform Drives In Slow Speed Only-
probable cause:Remedy:

1. Speed switch (S7-1) defective.
1. Replace switch.
2A. Differential valve coil (2H-18A) or speed valve coils (3H-18A-1, 3H-
18A-2) open or shorted. (Models 3220, 4620 and 4626)
2A. Check continuity. Replace if defective.
2B. Pilot valve coil (3H-18A) open or shorted. (Models 6826 and 6832)
2B. Check continuity. Replace if defective.
3. Dump valve coil (2H-21) open or shorted.
3. Check continuity. Replace if defective.
4. Defective wire #18 in arm cord assembly or loose connection at pin #18 on terminal strip.
4. Check continuity. Replace if defective. Tighten connection.
5. High Speed Limit Switch (LS1) open or shorted.
5. Replace switch.
6. Diode (D17-2) open or shorted.
6. Check continuity. Replace if defective.
7. Defective wire #18, #18A or #21.
7. Check continuity. Replace if defective.

You can go to skyjacks website and to their "manuals" section and download it to help you with location of components etc.
"https://techpub.skyjack.com/en-au/document/?type=manual&id=1463"
If this link does not work then you can go to the website and at the top there will be a menu choice at the top of the right side of the page labeled "MySkyjack" you can find where to go in there.

Posted 30 Oct 2022 16:26
By swoop223
joined 23 Mar'12 - 3,696 messages
North Carolina, United States

You've been swooped!
swoop223@gmail.com

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