Sanderson 622 fuel problems

Discussion in 'Classic Machinery' started by Rs chunk, Apr 10, 2018.

  1. Rs chunk

    Rs chunk Member

    hi guys my friend has a old 622 when he bought it the guy before had fitted a bulb primer like a boat on the main fuel pump and a check valve, anyway the bulb perished so we fitted new fuel pipe and binned it and the check valve apart from a struggle to get fuel to prime to the filters all was well for most of the time apart from the fuel running back occasionally and sometimes cutting out. So recently we had the transmission out for a refurb so took tank off and cleaned it out, tonight we got tank back on and fitted a new lift pump went to bleed it and can’t get the pump to lift the fuel you can blow back to tank no probs and use airline to pressurise tank to get diesel up to filter but primer still won’t work. Did these forklifts have issues ever with lifting the fuel up from the tank? Half thinking of a wee 12v pump
     
  2. essexpete

    essexpete Member

    Location:
    Essex
    I assume it is a Ford engine?
    I think the lift pump set up was different on different eras of engines with perhaps three types of main pumps over the years.
    Are you sure there is not some air being drawn somewhere. Is there a fuel fed start heater for example?
     
  3. Rs chunk

    Rs chunk Member

    Yes ford engine with in-line pump. Can’t mind is there a heater plug fitted air leak would need to be between the fuel tank and lift pump but can’t see where it all seems fine
     
  4. TeaBread

    TeaBread Member

    Is elbow in fuel line clear (above tank and under one piece mudguards) not sure it is the problem but they always block in spite of 'airline' clearing
     
  5. Mursal

    Mursal Member

    Fill it to the brim would you begetting air inside the tank?
     
    Thick Farmer likes this.
  6. Rs chunk

    Rs chunk Member

    It's only half full I'm wondering what the suction pipe is like as it's hidden behind a baffle and you can't remove it from tank you can't even tell is there dirt behind the baffle/bulkhead
     
    Mursal likes this.
  7. Can you rig the lift pump up to suck out of a container does it prime then
     
    tomlad and essexpete like this.
  8. Rs chunk

    Rs chunk Member

    Yip easily al try that later
     
  9. My SB 65 has an electric lift pump. Many, many pipes & joints, all need checking nown again. Slightest leak draws in air, and won't start in the morning.
    Daft plastic filter in the tank too, which clogs up easily.
     
  10. Rs chunk

    Rs chunk Member

    Silly question what's a sb 65 silly fuel tank on this you can tank suction pipe out or see it as there is a bulkhead in tank so maybe pipe is rusty. Going to try out of a jug after tea see will it suck out of it
     
  11. Sanderson Masted forklift. Different to telehandler, I know, but same era......
     
  12. Fearnodeere

    Fearnodeere New Member

    Had the same problem,it was the elbow above the tank blocked as mentioned by TeaBread.
     
  13. Rs chunk

    Rs chunk Member

    After much farting about I found my problem! As usual something simple and obvious the new lift pump was drawing air round the circular lid tighten the bolt and she sucks. Hopefully previous issues will be sorted due to washing out the tank
     
  14. Flat 10

    Flat 10 Member

    Location:
    Fen Edge
    Glad you are sorted, My 725 has a 12V pump fitted. Blows back to tank fine but doesn't like being less than half full of diesel .
     
  15. mikep

    mikep Member

    Electric pumps are so cheap that I fit them to any machine that has a whiff of a problem. Put them as near the tank as possible and leave the old lift pump Insitu. Solved loads of problems for about £15.00. of that doesn't work get a submersible.
     
  16. Flat 10

    Flat 10 Member

    Location:
    Fen Edge
    Off topic but does anyone know if the later 726 suffered from fraying ram seals clogging the suction filter or had they updated to better materials?
     
  17. Rs chunk

    Rs chunk Member

    We ended up fitting a electric pump seemed fine parked on flat but left it pointing down hill over night and fuel ran back. Sorted now
     
  18. mikep

    mikep Member

    Surprised as most electronic pumps are one way only. When I fitted one to my 247 I eventually took the old lift pump out of the loop and that cured the problem. Don't usually do that but was still sometimes was cavitating.
     
  19. BredRedHfd

    BredRedHfd Member

    Yes, suffered also. Bought one several years ago, been stood a bit. After a day carting bales, next day, hardly lift. Was bunged suction filter. Managed to change filter, but put new one on hand tight. The next time, managed to change without draining oil with a dextrous arm and a vet inspection glove! Gone now, but great machine. Well ahead of competition in their day...
     
    Flat 10 likes this.
  20. Rs chunk

    Rs chunk Member

    Sorry my writing was confusing we fitted a new mechanical lift pump and though it was fine but wasn't so then we fitted the electric one and it's sorted now
     

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