Discussion:
Jerky forward movement

Hello, We have a Crown SC4520 and lately the forward movement is jerky. Moving in reverse is fine. we have checked out and reconditioned the battery. We do not get any error codes. A technician came out and said that both the gearboxes would need to be replaced. Have anyone else come across this and a possible solution. I am waiting for the crown factory tech to come out and let us know what is wrong.

Any help is appreciated.
  • Posted 9 Jun 2023 00:06
  • By Sanjay_Patel
  • joined 9 Jun'23 - 1 message
  • Texas, United States
Sanjay Patel
Showing items 1 - 1 of 1 results.
With no event codes going off that usually rules out electrical issues. If the issue isn't happening when reversing it shouldn't be the gear boxes as the SCs don't have a sperate reverse and forward gear. If the drive motors are DC there could be an issue with the brushes or armature. It could be possible the motors are grounding out to the case.
Without event codes I wouldn't be able to tell you for sure what is wrong without a test drive.
  • Posted 20 Jun 2023 01:28
  • By DyslexicNerd_01
  • joined 13 Jun'23 - 222 messages
  • Wisconsin, United States

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Taylor T520S
Coraopolis, Pennsylvania, United States
Used - Sale & Hire
Terberg YT220
Balling, Denmark
Used - Sale

PREMIUM business

ROYPOW
Manufacturer of lithium forklift battery solutions, the global leader in the market of lithium batteries replacing lead acid batteries.
Latest job alerts …
Prospect CT, United States
Philadelphia, United States
Davenport, IA, United States
Dayton OH/Cincinnati OH, United States
Fact of the week
Brothers Adolf ("Adi") and Rudolf ("Rudi") Dassler split their shoe company after WWII due to a bitter feud, and established the rival companies of Adidas and Puma. Their personal animosity and business rivalry divided their German hometown Herzogenaurach. The town became known as "the town of bent necks" due to the intense loyalty to each brand.
Global Industry News
edition #1251 - 9 October 2025
In this week’s Forkliftaction News , hydrogen power is a theme as we report on the US marking its 10th annual National Hydrogen and Fuel Cell Day, an initiative to promote the benefits of the clean energy source... Continue reading
Taylor T520S
Coraopolis, Pennsylvania, United States
Used - Sale & Hire
Terberg YT220
Balling, Denmark
Used - Sale
Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY

PREMIUM business

ROYPOW
Manufacturer of lithium forklift battery solutions, the global leader in the market of lithium batteries replacing lead acid batteries.
Global Industry News
edition #1251 - 9 October 2025
In this week’s Forkliftaction News , hydrogen power is a theme as we report on the US marking its 10th annual National Hydrogen and Fuel Cell Day, an initiative to promote the benefits of the clean energy source... Continue reading
Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY