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  1. S

    M1090 Dump bed not Descending!?

    The bed will bleed all the way down if left for 5-6 months without the braces up (that's how I found it) and rise perfectly with the electrical switch that controls the four way on top of the sub plate. The four way operates perfectly though. I took it off the subplate and used my phone to...
  2. S

    M1090 Dump bed not Descending!?

    So out of the two lines going into the hydraulic cylinder I would assume you're talking about the one on the bottom. I understand I could allow oil out of the bottom side of the cylinder, by doing doing that oil would still have to move through the four way the four way valve filling the top of...
  3. S

    M1090 Dump bed not Descending!?

    Yes, So as the hydraulic ram moves, the "wadding" moves forward or backward, hydraulic oil comes out and through four way then fills into the other side of the rams wadding. if I watch the hydraulic tank as I'm actuating the cylinder it only rises or lowers a tiny amount in the hydraulic tank it...
  4. S

    M1090 Dump bed not Descending!?

    That check ball is probably going to be in that Parker subplate hu? Honestly I haven't looked at the cabs hydraulic system, it has been operating fine and there are more lines coming in and out of it compared to the bed lift's valve system. If it's inside that subplate I'd like to find the...
  5. S

    M1090 Dump bed not Descending!?

    So after messing around with this morning manually actuating the four-way directional valve operates the dump bed into the up position but still will not put it in the down position looking me to believe that something's wrong with that Parker sub plate it's too simple of a system to have any...
  6. S

    FLU419 front loader hydraulic pump issues.

    Yes originally when the pump failed it was making a horrible screeching sound, sounded like a bad bearing and because it's been sitting for so long getting the pulley off was difficult and I'm also working on dump trucks and other vehicles so in the meantime I was trying to find a replacement...
  7. S

    M1090 Dump bed not Descending!?

    That is a good point but since the bed does go up either direction I put the valve, does seem that the valve is working also, I checked the wires continuity, all good. The ectric valve seems to be working but the subplate is my guess, he took it apart... and stripped a plug which I was able to...
  8. S

    M1090 Dump bed not Descending!?

    That's an excellent suggestion I did not think of that I did take the Parker Valve off, I set my phone in front of it, and recorded while I toggled the up down function and it did move both directions. Tomorrow I'll take a look and see if I can manually move those valves
  9. S

    FLU419 front loader hydraulic pump issues.

    Yes that's my plan, I have the belt and I have time to do it tomorrow, but just in case the pump bearing and/or shaft is bad (in which case I might be able to take the bearings and/or the shaft to Granger or Whistler and get a copy) but I need to locate a replacement just in case.
  10. S

    FLU419 front loader hydraulic pump issues.

    Yeah now that I know exactly what I'm looking for I'm finding some available ones quite the price range anywhere from 600 to $1,400 not including shipping and handling 😅
  11. S

    FLU419 front loader hydraulic pump issues.

    All right so I found it!! I can't believe I never was able to find an eBay through America.... https://www.ebay.com/itm/112462999553?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=O8_3cdQ4TTK&sssrc=4429486&ssuid=v_axb12sq92&var=&widget_ver=artemis&media=COPY
  12. S

    FLU419 front loader hydraulic pump issues.

    Excellent I'll take a look right now! Thank you
  13. S

    M1090 Dump bed not Descending!?

    So I just checked that electric for away control valve thing and it's working and I swapped the wiring and it still works so my wiring is good and that four-way is good.... You can see in the picture The cylinder goes directly into that subplate.... maybe that's the thing I need to a look at
  14. S

    FLU419 front loader hydraulic pump issues.

    I haven't put the belts on yet I'll probably get around to that tomorrow but here's a picture of the original pump as it's hanging right now I haven't finished removing the pulley, I'm going to see what I can see and clean it up before I put the new belt on
  15. S

    M1090 Dump bed not Descending!?

    A previous mechanic started working on a m1090 dump truck he took apart a lot of wiring and disassembled most of the hydraulic systems. I was able to get everything put back together, including the electrical system, Runs Great! bed goes up but will not come down... I've looked through the...
  16. S

    FLU419 front loader hydraulic pump issues.

    All right after some talking with Mason Dynamics I could only find a 24 volt pump with like a 3-4 gpm max which would mean my buckets going to be really slow, also it can't be continuous use otherwise it would burn up so it would have to be hooked up to a hot switch or switches on the levers...
  17. S

    FLU419 front loader hydraulic pump issues.

    I've decided to go with an electric pump, looking for a 2100 psi 24 volt. Will keep everyone updated. Any advice is appreciated 👍
  18. S

    FLU419 front loader hydraulic pump issues.

    Awesome thank you for replying. I have ordered new belts and should have done that first (it has been sitting for at least 4 years) I've been reading; some people have replaced the front loader pump with a 24 volt hydraulic pump. Do you think that would be a good idea? I am concerned about...
  19. S

    FLU419 front loader hydraulic pump issues.

    My unimog front loader hydraulic pump (the belt driven one) is glazing the belt and heating up the pulley. I've messed. With it and it is not wobbly or anything obvious. I cracked the sending line and turned it and it seemed smooth enough but I believe it has gone bad. I checked the tension, am...
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