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Recent content by JimFord555

Yesterday's Tractor Forums
  1. J

    Ford 555 hydraulics fixed !

    1979 ford 555 lost all hydraulics a few months back and after going through everything time and time again I had a mechanic friend come over and we did some further diagnosing Found the system pressure was at 340psi and only came up too 540psi when throttled up and lifting up on the rigger...
  2. J

    Hydraulics not working proper on 555

    With the hoe bypassed the loader works normally
  3. J

    Hydraulics not working proper on 555

    You are correct, that s how its plumbed. The backhoe manifold intake from the pump is on the right side where the system over pressure valve is and the power beyond (too the loader) and the sump return to tank are on the left outlet end of the manifold with the regenerative check valve, back...
  4. J

    Hydraulics not working proper on 555

    1979 555 backhoe lost all hydraulics suddenly (if I rev it up I can move the loader up and down slowly tilt the loader and get small movements out of the hoe side to side and bucket curl but can t lift the hoe (machine runs perfect) Fluid level is good Checked the tank for a plugged screen...
  5. J

    555 hydraulics not working

    1979 555 backhoe lost all hydraulics suddenly Checked the tank for a plugged screen or loose baffle restricting fluid Pulled the pump and went through it and its all good Removed disassembled and cleaned hoe and loader system over pressure valves Bypassed the hoe and the loader...
  6. J

    555 no hydraulics

    Thanks , ill check the regenerative check valve once I locate it, My manual doesn t have that in the trouble shooting section. It just says check fluid levels , pump etc and the 2 system over pressure valves
  7. J

    555 no hydraulics

    1979 555 backhoe lost all hydraulics Checked the tank for a plugged screen or loose baffle restricting fluid Pulled the pump and went through it and its all good Removed disassembled and cleaned hoe and loader system over pressure valves Bypassed the hoe and the loader worked perfect...
  8. J

    555 hydraulic failure parts help

    Lost all hydraulics, checked everything, bypassed hoe and loader works perfect again. Must be system overpressure valve D8NND683AA. cross creek sent me to gulf south and they only sell the entire hydraulic manifold ! I haven t heard back from the Ford Newholland rep. Is there an online machine...
  9. J

    555 no hydraulics

    Sounds good. I have a manual and a few heavy duty mechanic friends that can help with the test equipment. This is a very frustrating problem
  10. J

    555 no hydraulics

    1979 555 lost all hydraulics suddenly I can slightly tilt the loader and that s about it. Did some research and checked: -hoe main relieve valve -loader system relieve valve -tank had proper level of hydraulic fluid then I drained it undid the outlet and it has no filter screen and...
  11. J

    Ford 555 ready for engine break in

    Thanks again guys. And i mean that! Very happy to hear you like my vids Check break. Im a dual ticketed electrician / power lineman by day so diesel mechanic skills are being learned one task at a time and Im loving it. I have a great feeling of accomplishment now that my old 555 is back up...
  12. J

    Ford 555 ready for engine break in

    While i have your attention! While lifting a big boulder slung from the hoe some fluid spirited out of the hoe arm where it bends (knuckle ?) then after had no problem digging. Couldnt see where the fluid came from. But i obviously over stressed the fitting lifting such a big rock. Any advice ?
  13. J

    Ford 555 ready for engine break in

    Thanks Bern ! You have been a huge help through this process and that means a lot coming from you. I did prime and paint the engine with duplicolor high heat engine enamel 1) The threaded port in the intake tube is for the air cleaner restriction switch, DO I need this ? Not sure what...
  14. J

    Ford 555 ready for engine break in

    Thanks M-MAN I understand not hammering on it until Im confident it all sounds good and wont explode then working it hard to get some heat in the engine. What is the approx half throttle / full throttle RPM ? What is good oil pressure ? I have a proper gauge now that reads PSI
  15. J

    Ford 555 ready for engine break in

    -Sleeved and rebuilt 201 CID diesel -rebuilt torque converter with new torque plate -Rebuilt then professionally calibrated Injector pump and injectors with new tips -Re cored radiator -tank cleaned and lined -re wired almost everything -proper oil pressure gauge installed -all new...
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