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  1. barbican

    Pump / Motor internal leakage on Hyd system

  2. barbican

    Pump / Motor internal leakage on Hyd system

    Hi 73lafuite. The A6VM's on the system does not have any exchange valves, the only exchange valve i have discovered in the system is the one mounted at the generator pump. on the diagram it is located at the lowest right and has the 503.20.01.10 as a part number. i checked that valve and it is...
  3. barbican

    Pump / Motor internal leakage on Hyd system

    Hi, unfortunately i have not been able to slove the problem yet, this has left me to uninstall and inspect every hydraulic component separately, so far i have inspected almost half of them. I will for sure let you guys know what was causing this once i disocver the cause.
  4. barbican

    Pump / Motor internal leakage on Hyd system

    Hi Jacc. I have reviewed the Schematic and indeed that pump does serve as well as a feed pressure pump, but only for the Luffing cylinder and it's pump lines. it is controlled by the 4L-Y02 valve which is always closed during steering mode. I can't find any path for this circuit to get oil into...
  5. barbican

    Pump / Motor internal leakage on Hyd system

    Hi Jacc. That steering pump you are referring to dumps its oil to the main hydraulic tank once the relief valve opens at 290 Bar, it is not connected to the feed pressure system. I am currently in progress of replacing the pump which is unresponsive with a new one, that is because i am out of...
  6. barbican

    Pump / Motor internal leakage on Hyd system

    The H62 Valves are closed and even if they were open would not cause a problem of this sort because there is an flow restriction orifice in series with each valve. these valves are used for emergency operation of the winch in scenarios where you need to release the brakes and lower a load...
  7. barbican

    Pump / Motor internal leakage on Hyd system

    The Two "RHZ 20 SR" valves get feed by the TAP60 Pump, if you follow the lines to these two check valves you will see that they are feed by the TAP60 pump. you are correct, the brakes operates of the TAP60 pressure as well, but because of something that is dropping the pressure on the TAP60...
  8. barbican

    Pump / Motor internal leakage on Hyd system

    If you look at the upper right, behind the Luffing Gear pump is a TAP60 200 Pump (A1A), that's the charge pump or feed pump.
  9. barbican

    Pump / Motor internal leakage on Hyd system

    Hi 73lafuite. The winch will operate without load but only in one direction which is UP, the down direction will cause the pumps to lose charge pressure, When there is a load on the winch, the problem will be apperent mostly when lowering the load, the charge pressure will drop at that time...
  10. barbican

    Pump / Motor internal leakage on Hyd system

    Tried the Flir camera on the motors but couldn't find any thing, i even tried to measure the drain using a bucket but that didn't reveal any thing wrong with them. Strange thing now is that one of the A4VG pump is not producing any pressure, i am trying to accuate it by hand uaing a screwdriver...
  11. barbican

    Pump / Motor internal leakage on Hyd system

    Zeusfaber. That is one of the two pumps for the winch.
  12. barbican

    Pump / Motor internal leakage on Hyd system

    Hi 73lafuite. I was going to send the diagram of the system i am working on once i reached back home, now that i am back, you can view the diagram in the attachment. any help or ideas would be very appreciated. The diagram shows the full main system, the current problem is just with the winch...
  13. barbican

    Pump / Motor internal leakage on Hyd system

    The system does not have any valve. The rotation of the winch is controlled by the pump swash plate angle. I have checked all the motors and the case drain on all of them looks normal. I'm currently having a strange problem with one of the pumps (A4VG 250), where one will produce pressure and...
  14. barbican

    Pump / Motor internal leakage on Hyd system

    No, there is non.
  15. barbican

    Pump / Motor internal leakage on Hyd system

    Hi I got a Hydraulic Winch which runs out of two pumps which are paralleled, the winch is rotated by 4 A6VM motors, the whole system is a closed loop system. i got currently a problem where i am losing charge pressure from the compensation pump during winch operation, i suspect one of the...
  16. barbican

    Burner Type

    Hi At one of our facilities we have a Vertical boiler which uses a Rotary Cup Burner, The unit is rated for 5400KW and is very old. A specialized contractor has now recommended replacing the burner with a new one due to problems that we have been facing with the current one. The contractor is...
  17. barbican

    Allison Transmission overheating

    Fluid level is ok and pressure is ok according to specs. PS is there any one you guys can recommend contacting that are good with these transmissions (9000 series).
  18. barbican

    Allison Transmission overheating

    Tbuelna The transmission output shaft does rotate when it is in neutral, It simply acts as it is in first gear while its set to neutral. If you guys need more information (Diagrams,Specs,ect) just let me know. Thanks..
  19. barbican

    Allison Transmission overheating

    btrueblood The transmission is designed to be operated stationary (Allison 9600S). The transmission oil is cooled trough a heat exchanger that gets cooling water from the engine that drives the transmission (it uses the engine coolant pump). I didn't have any problems having it running for...
  20. barbican

    Allison Transmission overheating

    Hi I got a problem with a transmission (Allison Transmission 9885) that overheats on neutral. The transmission is driven by an engine and connected to a pump (the whole thing is a stationary equipment). The transmission does not overheat while on gear and it shifts gears prefect, it only got...

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