Hyster S50XM:
Stuck in Forward

I'm stuck in forward. It moves forward in Forward and Neutral. In Reverse it sometimes moves forward, but most of the time it seems to want to move in reverse, but can't-like the brake is on. Any ideas?
  • Posted 14 Jul 2012 14:19
  • Discussion started by junkyard
  • California, United States
Showing items 1 - 9 of 9 results.
ok- I am still using the lift, so I have to put it back together after each diagnostic session---I've been collecting information because I want to do as much as I can in each session. I think I can spend some quality time with the unit in the next few days, and I will test the functionality of the various components as per the manual and instructions I have received. I will update this post after I have done some significant testing. Thanks to everyone for your suggestions!
  • Posted 18 Jul 2012 21:07
  • Reply by junkyard
  • California, United States
just to clarify 'control valve' i mean the transmission control valve not the hydraulic control valve.
and yes if something went wrong in that 'transmission' control valve it could effect just about anything controlling the transmission function.
But my origional comment was intended to guide you towards checking the electrical side of the directional circuit, starting at the control solenoids on the transmission control valve and work your way backwards to the directional switch.
  • Posted 18 Jul 2012 20:37
  • Reply by Jplayer
  • North Carolina, United States
John Player Jr
_________________
LiftOne, LLC
Charlotte, NC
Email: jplayer@liftone.net
It's not a monotrol. Is there anything in the control valve assembly affects both clutch packs and the inching pedal? The bias is definitely towards the forward gear.
  • Posted 17 Jul 2012 22:49
  • Reply by junkyard
  • California, United States
even though it could be a possible clutchpack issue i would start by checking out the control valve.
- signals to the solenoids (make sure its not trying to engage both at same time while in reverse)
- if it is monotrol then check the pedal assy real good

then take pressure readings
  • Posted 17 Jul 2012 21:55
  • Reply by Jplayer
  • North Carolina, United States
John Player Jr
_________________
LiftOne, LLC
Charlotte, NC
Email: jplayer@liftone.net
According to the tag, the delivery date was in 1997, and the S/N is D187V04384T. I added my email address to my profile.
  • Posted 17 Jul 2012 11:28
  • Reply by junkyard
  • California, United States
Do you have the Serial # of the truck in question and also do you have a email to post in your profile in case anyone wanted to contact you?
  • Posted 15 Jul 2012 20:34
  • Reply by kevin_t
  • Pennsylvania, United States
I haven't checked the pressures. I probably need to get a service manual before I go much further, because I don't know how to do that. I am a decent mechanic, and I've changed mast seals and rebuilt the top end on another lift, but I may be in over my head on the transmission. I can try draining the oil though. Also, one other symptom: the inching pedal works, but it seems like it isn't engaging fully. If I rev the unit with the pedal depressed it will overcome the brake and move forward. Thanks for your help!
  • Posted 15 Jul 2012 14:31
  • Reply by junkyard
  • California, United States
If the forward clutch pack has warped or broken discs and is dragging bad, thats the symptoms you get. One quick test you can do is drain the oil out and start it. If it still wants to move forward, while in neutral, it definitely has a damaged clutch pack.
  • Posted 15 Jul 2012 13:24
  • Reply by mrfixit
  • New York, United States
Sounds like it may have stacked the packs in the transmission. Have you done pressure checks to see if the pressures are correct?
  • Posted 15 Jul 2012 13:04
  • Reply by meliftman
  • Alabama, United States
Liftman
Retired
Elberta, Al.

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.

Melbourne, Vic, Australia Chinese manufacturer Hangcha has launched an Australian subsidiary, Hangcha Australia, following on from similar operations in Europe, South East Asia, the United States, Canada, the Netherlands and Mexico. The...
Singapore As Dematic celebrates reaching the milestone of 50 years of operations in Asia, there is a real optimism in the logistics automation and software company's Asia team about the...

In the Virtual Expo

KOOI®ReachForks by MEIJER Handling Solutions
Prevent damage to pallets and goods, increase efficiency, and reduce operating costs with KOOI®ReachForks. Reachforks allow a variety of different pallet sizes to be handled safely and quickly.

Inside Forkliftaction

There's some optimism about the global economy from one of the world's leading banks, Deutsche Bank.
The bank's chief investment officer for Private Banking, Christian Nolting, is tipping mild recessions in Europe and the US for 2023, "but improving dynamics in Asia where supply chains are all but resolved". ...Continue Reading

Next Editorial Features

FORKLIFT MANUFACTURING IN CHINA - Feb 2023
SMART ATTACHMENTS - Mar 2023

Inside Forkliftaction

There's some optimism about the global economy from one of the world's leading banks, Deutsche Bank.
The bank's chief investment officer for Private Banking, Christian Nolting, is tipping mild recessions in Europe and the US for 2023, "but improving dynamics in Asia where supply chains are all but resolved". ...Continue Reading
INTELLilight is a flexible lighting solution for work machines that can be adapted to the operators needs and to the environment with which they are working in.
See your dealership promoted extensively on Forkliftacion and Machinery-onQ with our 12-month dealer advertising package. You'll receive: Wholesale trading (wholesale prices and opportunities) Unlimited stock on Machinery-onQ Extensive promotion...

Your Focus

Stuart Taylor
Stuart Taylor

Fact of the week

The People's Choice Word of the Year 2022 as announced by Macquarie Dictionary was decided by Australia as "bachelor's handbag". The term refers to a takeaway roast chicken, often packaged in a small plastic bag with a handle which resembles a handbag. As it is prepared for immediate consumption, often favoured by a single person, it received this humorous colloquial name.
Monterrey, NL, Mexico Honeywell has expanded operations in Nuevo Leon at its Global Supply Chain Centre of Excellence in Monterrey, one of its main logistics centres in the northeast region of Mexico...
Hamburg, Germany Parts giant TVH has selected the Körber K. Motion Warehouse Management System (WMS) and K.Motion Warehouse Control System (WCS) for its warehouse automation. TVH will upgrade warehouses across five...

Fact of the week

The People's Choice Word of the Year 2022 as announced by Macquarie Dictionary was decided by Australia as "bachelor's handbag". The term refers to a takeaway roast chicken, often packaged in a small plastic bag with a handle which resembles a handbag. As it is prepared for immediate consumption, often favoured by a single person, it received this humorous colloquial name.