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Loss of drive, forward / reverse

I think this will be a simple problem for those in the know.
It is about as basic a gas forklift as has been made.
Xmas morning, moved forklift, been sluggish drivewise for years, lost all drive.
You can select forward or reverse, feels like it has engaged, but other than a very slight movement, nothing happens.
I have a workshop manual for this model and Im reasonably ok with most mechanics.
So is it torque converter or valve which engages drive?
Any help much appreciated!!
  • Posted 31 Dec 2020 03:05
  • By Richard_Lennard
  • joined 31 Dec'20 - 1 message
  • Devon, United Kingdom
Richard Lennard
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can you give a full model number? and possibly serial number?

but with that said, most transmisions in lift trucks work alot like they do in a car/truck. The torque converter does play a part but in most cases you'll find one of two things that will cause a transmission not to pull, one is low pressure due to clogged valves or filter/sump screen or possibly an inching valve problem.
second would be the worse case scenario of worn out clutch discs.
since you say you can feel it engage it could be either.
if i had a full model number i could see which model trans it has in it and can give you info on how to check it out.
  • Posted 31 Dec 2020 14:45
  • By swoop223
  • joined 23 Mar'12 - 3,691 messages
  • North Carolina, United States
You've been swooped!
swoop223@gmail.com
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Fact of the week
The black box flight recorder was invented by Australian scientist David Warren in the mid-1950s. While initially met with indifference in Australia, his invention gained international recognition, particularly in the UK, and is now a mandatory piece of safety equipment on all commercial aircraft.