Discussion:
Clark C500-YS80

Hey guys- working on above unit- serial # Y685-0122-7575- has 2 issues-

First- this has the Perkins diesel- does anyone know where the engine breather is? There's a hose running from the valve cover to the engine oil pan, but that's all I see. Crankcase pressure is pushing oil out everywhere.

2nd- this has a 2 speed auto trans. Trans works perfectly when cold. When warm trans has almost a 2 stage engagement of forward & reverse. When changing direction or using the brake (which automatically engages the inching spool), trans initially engages slightly. If you raise the engine RPM & then let off the throttle, as the engine returns to idle the trans then drops fully into gear. Trans then acts as normal, pulls good with no slippage. Trans fluid is up to spec & as pink as could be with no burnt smell. If the parking brake is used to stop unit- trans works as normal- no slippage. If you do use the service brake &/or change direction, & keep the engine at idle, trans won't fully engage. If you keep the engine RPM elevated above idle (even slightly), trans also won't fully engage. The only trick to full engagement is bumping the throttle. Any thoughts? Anyone have a manual on the trans? Any help is greatly appreciated
  • Posted 11 Apr 2013 10:33
  • By bbforks
  • joined 1 Mar'12 - 1,437 messages
  • Pennsylvania, United States
bbforks (at) Hotmail (dot) com
Customers love technology- until they have to pay to fix it!
Showing items 1 - 2 of 2 results.
Thanks duo- would anyone have a breakdown of the control valve they could share?
  • Posted 12 Apr 2013 01:38
  • By bbforks
  • joined 1 Mar'12 - 1,437 messages
  • Pennsylvania, United States
bbforks (at) Hotmail (dot) com
Customers love technology- until they have to pay to fix it!
Sound like a weak or broken spring on one of the plungers in the control valve. We had the same symptoms on a Daewoo. A competitor quoted to rebuild the transmission and the customer wanted a second opinion. We dismantled the control valve and found the broken spring.
  • Posted 11 Apr 2013 21:38
  • By duodeluxe
  • joined 11 Feb'05 - 923 messages
  • United States
duodeluxe

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