Discussion:
Won't move like it should in for or rev?

Hi Everyone,

I have a TM15S (1980 24volt)that take off like a snail, and when the double contractor kicks in it hauls butt(jumps)for a second, but then drops out like it over loads. The happen's in both forward and reverse. Up on blocks everything works as it should. It seems like a thermal trip? I'm stumped on where to start! Any help sou be appreciated.

I bought a service manual from holt out of California for $148. It only has wear troubleshooting in the hydraulic section. It has repair and diagnostics, but I would have to disassemble everything?
  • Posted 25 Jan 2014 06:12
  • By pineddy
  • joined 8 Jan'14 - 12 messages
  • Nevada, United States
Fix it like it's your own equipment!
Showing items 1 - 9 of 9 results.
I'm sorry if I missed some info but, if you identify the system, you can go to the Flight Systems website and get the troubleshooting manual for it. I assume it's a GE system. If it's Cableform, so sorry.
  • Posted 7 Feb 2023 01:04
  • By ErichO
  • joined 26 Oct'21 - 83 messages
  • Washington, United States
Sounds like you have a shorted #2 rec (snubber). Small block like assembly connected to white and red gate wire. (Hate to see unresolved threads, hope this helps someone moving forward).
  • Posted 3 Feb 2023 13:48
  • By snowmonkey
  • joined 13 Oct'12 - 36 messages
  • Alberta, Canada
You're going to have to explain better. Do the contactors engage when you press the petal? Does anything turn on? Does it move at all? What cuts out?
  • Posted 9 Feb 2018 06:55
  • By mrfixit
  • joined 11 Dec'08 - 1,434 messages
  • New York, United States
Im having the same issue on a clark tm15s. Except even on blocks, it cuts out as soon as the accelerator is pressed. Did anyone find a solution to this issue? Ive changed both directional contactors already.
  • Posted 9 Feb 2018 00:37
  • By kyle93
  • joined 4 Oct'16 - 13 messages
  • Massachusetts, United States
Your talking about the big aluminum ones on the left side?
  • Posted 27 Jan 2014 14:41
  • By pineddy
  • joined 8 Jan'14 - 12 messages
  • Nevada, United States
Fix it like it's your own equipment!
I have a fkuke meter?
  • Posted 27 Jan 2014 14:38
  • By pineddy
  • joined 8 Jan'14 - 12 messages
  • Nevada, United States
Fix it like it's your own equipment!
That's exacty what it doing, Mr fit it:?
  • Posted 27 Jan 2014 14:34
  • Modified 27 Jan 2014 14:36 by poster
  • By pineddy
  • joined 8 Jan'14 - 12 messages
  • Nevada, United States
Fix it like it's your own equipment!
my W.A.G. is that you have a 'leaky' (maybe all the way bad) fly-back diode. one of the 2 large stud/pigtial diodes on their own heat-sink in the chopper panel. you [most likely] would have to test it with 1 of 2 possible methods, either a "handyman' tester, or 'check by replacing with a known good one'.
  • Posted 25 Jan 2014 09:14
  • By edward_t
  • joined 5 Mar'08 - 2,334 messages
  • South Carolina, United States
"it's not rocket surgery"
When you say, "up on blocks everything works as it should" do you mean it accelerates smoothly and speeds up to a fast speed and when it kicks into high speed it keeps going ? It's supposed to trip off if it senses something wrong, that wouldn't be thermal problem.
  • Posted 25 Jan 2014 08:04
  • By mrfixit
  • joined 11 Dec'08 - 1,434 messages
  • New York, United States

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