Hyster S55FTS:
Transmission slipping

when put in gear, trans engages then kicks out when accelerated. ran diagnostic, voltage on brake position switch 1.27 volt -.78 volt. checked input volts to switch 5.0volts, good. Check sensor output volts to VSM, 4.25 volt. check sensor wire voltage at VSM input plug, 4.25 volts, but dash readout says 1.27. Bad VSM? tried different switch, no change to readings. Could something else effect this I'm missing.
  • Posted 7 Jun 2016 19:28
  • Discussion started by mardabas
  • Michigan, United States
Showing items 1 - 6 of 6 results.
The voltage does decrease when the pedal is pushed. Brake pressure goes from about 8psi to 500psi when applied. calibrating the transmission made no difference. I didn't check the % screen. The VSM is an old style and the new one will have to be programmed by the dealer, so I'll get with the dealer for the install. Thanks so much for the help.
  • Posted 10 Jun 2016 19:32
  • Reply by mardabas
  • Michigan, United States
There is not anything else in that circuit unless you have a wiring problem. Are you in the inch position screen on the display? You should see the voltage decrease as you step down on the pedal. Have you checked the brake pressure switch output? Have you tried to calibrate the transmission? There is also a inch percentage screen, it should be at 0% with pedal released.
  • Posted 8 Jun 2016 23:00
  • Reply by BREWSKI
  • Nebraska, United States
I rechecked the pedal released voltage, 4.05 volts. according to the manual this is within range of released voltage reading. The VSM is showing 1.37 in the display. I'm trying to figure out if there are any other inputs that could effect the display reading, or if the VSM is defective
  • Posted 8 Jun 2016 19:49
  • Reply by mardabas
  • Michigan, United States
Did you get the 4.25 with the connector plugged into the VSM or was it unplugged? Check the voltage on the VSM sensor terminal with the connector unplugged. If it is 4.25 the VSM is defective.
  • Posted 7 Jun 2016 22:53
  • Reply by BREWSKI
  • Nebraska, United States
If you have 4.25 output from the pressure sensor the sensor is defective. I do not understand why the display says a lower voltage.
  • Posted 7 Jun 2016 22:51
  • Reply by BREWSKI
  • Nebraska, United States
Are you seeing any codes on the display?
  • Posted 7 Jun 2016 22:47
  • Reply by BREWSKI
  • Nebraska, United States

Having trouble using the Discussion Forums? Contact us for help.

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Fact of the week

John Lennon had terrible eyesight and was very self-conscious about it. Early in his career, he would not wear his glasses during performances. In the end, John's 'granny glasses' became one of his most iconic trademarks. His last pair, worn on that tragic day in 1980, are kept at 'The Beatles Story' exhibit in Liverpool, insured for over £1 million.

FOR SALE ON MACHINERY-ONQ

Ncn 100-289TH
Denmark
Denmark
Canada Ontario
China
Netherlands

Upcoming Events

December 7-8, 2022 - Virtual, United States
April 18 - 21, 2023 - Seoul, Korea, Republic Of
June 27-28, 2023 - Amsterdam, Netherlands

Next Editorial Features

FLEET MANAGEMENT - September
CONTAINER HANDLING - November