Discussion:
Hyster J1.80XMT - Water ingress in AC drive motors

Hello, I have been to a few Hyster J1.80XMT trucks recently that are all suffering with water ingress into the AC drive motors and throwing up codes. A strip down of the motor, clean out the rust and replace the encoder is fixing the fault - but I cannot see how or where this water is getting into the motors. Would like to be able to prevent ingress to avoid future issues.

Any ideas? Common issue on these machines?

Cheers,

Dan
  • Posted 3 Sep 2019 00:26
  • By BFT8679
  • joined 26 Apr'18 - 8 messages
  • Berkshire, United Kingdom
Showing items 1 - 3 of 3 results.
Thanks Dan, You were spot on. Thanks again for your help.
  • Posted 14 Oct 2019 02:23
  • By SMcG
  • joined 18 Feb'18 - 30 messages
  • Angus, United Kingdom
Hello SMcG, thanks for your reply. We eventually found the ingress was coming in via the wiring grommet in the top of the motor. We have made attempts to seal this up as best as possible.

Regarding code 6, I have this listed as "Request traction function while forward and reverse switches are opened." Code 7 is "Accelerator input voltage too high on power up."

Code 6 normally comes up when you have left it in drive, got off the seat and then get back on and attempt to drive without resetting direction lever into neutral first.

Cheers,

Dan
  • Posted 4 Oct 2019 18:19
  • By BFT8679
  • joined 26 Apr'18 - 8 messages
  • Berkshire, United Kingdom
Hi Dan, We have the very same problem, Remove strip and clean the motor, replace the encoder bearing, the only other thing that we picked up when checking the motors was the cut out fitted inside the windings was faulty, just got a new cut out and fitted it external on with araldite.
refitted and job done.
We have a new fault this morning code 6 high throttle voltage? Any ideas on this one.
  • Posted 4 Oct 2019 18:00
  • By SMcG
  • joined 18 Feb'18 - 30 messages
  • Angus, United Kingdom

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.

Fact of the week
Sourdough bread contains Lactobacillus reuteri, a probiotic bacteria. During pregnancy and breastfeeding, these bacteria can travel from the mother's colon to her breast tissue and be passed to the infant through breast milk. It offers various health benefits, including potential protection against breast cancer.
Global Industry News
edition #1236 - 26 June 2025
As June comes to a close, the month when our sector recognises National Forklift Safety Day , the United Kingdom’s Association of Industrial Truck Trainers (AITT) has issued a timely reminder of the need to ensure any staff training is fully accredited... Continue reading
Unicarriers FD80-2
Yokohama, Japan
Used - Sale
Terberg TT223
Balling, Denmark
Used - Sale
Fact of the week
Sourdough bread contains Lactobacillus reuteri, a probiotic bacteria. During pregnancy and breastfeeding, these bacteria can travel from the mother's colon to her breast tissue and be passed to the infant through breast milk. It offers various health benefits, including potential protection against breast cancer.
Ice 28INCH-AUTO-SCRUBBER
Morgantown, Pennsylvania, United States
Used - Sale
USD8,350
Aichi RX07B
Yokohama, Japan
Used - Sale
Upcoming industry events …
July 9-10, 2025 - Birmingham, United Kingdom
October 21-23, 2025 - Panama City, Panama
Latest job alerts …
Uxbridge, Canada
St. Louis, MO, United States
Evansville, IN, United States
Daleville, IN, United States
Movers & Shakers
Jeannette Walker Jeannette Walker
CEO, MHEDA
President, European Rental Association (ERA)
Chief marketing officer, JLT Mobile Computers
Chief executive officer, East Penn Manufacturing