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Recent content by Mike Fryer

  1. M

    520C Dresser transmission problem

    Hi. It is a mechanical shift linkage. I think you may be right on a worn clutch pack as it loses drive in reverse only when it is hot
  2. M

    520C Dresser transmission problem

    Hi John. I have changed the filter and oil. I took pressure readings on the control valve and everything seems normal when transmission is cold or hot. If it was a broken seal ring would I expect to see a drop in pressure when the machine is hot on the reverse gear test point? Could this be...
  3. M

    520C Dresser transmission problem

    Hi. Still hoping someone can advise on the above.
  4. M

    520C Dresser transmission problem

    Greetings. My 520c dresser recently developed a problem when engaging reverse. After about 20-30 minutes of operation it loses power in reverse only. The forward gears will still have usual power, but in reverse the machine barely moves when it is at operating temperature. Before I remove...
  5. M

    Case 580sk forward/reverse problem

    Hi. I will check the date on the filter as I always etch the date on it when I change it and I would have done the oil simultaneously. Thankyou
  6. M

    Case 580sk forward/reverse problem

    Thankyou guys. I will check all of these suggestions and bring some feedback soon.
  7. M

    Case 580sk forward/reverse problem

    Hi. Will give that a shot. I cant imagine it's a fault in the transaxle. Could a failing torque converter be a cause of this? Or possibly an air lock developing between the oil pump and the fwd/rev valve when it is hot and the oil is thinner?
  8. M

    Case 580sk forward/reverse problem

    Greetings. When I start the machine cold it engages forward and reverse no problem. After the machine has been working for some time and is hot and I switch off for a short period then when I start up again it will not engage either forward or reverse. I if I switch off and wait for say 20...
  9. M

    621B trans problem.

    Hi Bigbert. I will check the condition of the oil but as far as I know not smelling burnt. I am making preparations to remove the engine and transmission, I will do it myself. I would much appreciate it if you could provide a repair manual via email as I am not sure how thourough the one I...
  10. M

    621B trans problem.

    I have just blocked (circuit isolation) k1,k2, kv and kr hoses and found that 3rd and 4th are not locking up.
  11. M

    621B trans problem.

    Hi Bigbert. Posted above are some findings from circuit isolation test. Bit confusing. Dont know what to make of it. Does this reveal any clues to you?
  12. M

    621B trans problem.

  13. M

    621B trans problem.

    Hi Bigbert, The reason I dismantled the control valve in the beginning was because previously when pushing a load in 1st gear the machine would jump/hop rapidly when revving up to get power. On dismantling the control valve I found broken and cracked gaskets and a small piece of metal about 6mm...
  14. M

    621B trans problem.

  15. M

    621B trans problem.

    Morning. I have done pressure tests and will attempt to post the results .
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