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  1. A

    Volvo 4400

    So having removed the valve body,cleaned, new seals & o rings, replaced a couple of solenoids, and rewired everything, Im back to square one. If anyone has any suggestions of any wreckers any where that would be appreciated.
  2. A

    Volvo 4400

    The manual is ok for pulling the transmission apart and putting back together. Unfortunately, the only diagnostic information it includes (other than the pressure tables) is "If it's f*#ked, replace it", and that isn't terribly useful for me.
  3. A

    Volvo 4400

    Here are some pictures from the manual. The main pump is within the torque convertor assembly (I think). There is a seperate lube pump housed within the transmission (I think). The third image gives me more food for thought re the solenoids and possible problems when one or more warm up.
  4. A

    Volvo 4400

    And further to your comment ozdozer, what pump would be ‘leaking’ ? Only pressure I see is from converter or lube pump, and low lube pump pressure wouldn’t cause the symptoms as far as I know.
  5. A

    Volvo 4400

    It seems like it is bleeding pressure somewhere, I just don’t have the knowledge to work out exactly where at this point. I can’t believe that the trans is buggered if it does what it is supposed to do at full revs, and pressure readings are ok.
  6. A

    Volvo 4400

    So the only external pump is for the steering and hydraulic. I am absolutely convinced that the trans isn’t buggered, but I can’t work out why it would drop pressure at low revs, but be fine at full revs. Machine is too old to warrant removal of the trans but I’d sure like to work out what the...
  7. A

    Volvo 4400

    So wiring has been fixed, I now have 4 gears however I still have the same drive issue. Transmission and converter pressures are in spec at wot as per the manual however at idle they drop away considerably, getting worse as the oil warms up. Main pressure is 185 psi at wot, but drops to 60 psi...
  8. A

    Volvo 4400

    So the investigation has continued further, and i think that there is a wiring issue with the gear selector, which may explain why 4th gear has never worked (always stayed in 3rd when either 3rd or 4th was selected). This leads me to wonder if there was power going to a solenoid that it wasn't...
  9. A

    Volvo 4400

    I have started looking at the solenoids. There is some suspect wiring to repair which was giving me a low ohm reading on the S1 solenoid (compared to the others of the same brand / type), and as this solenoid always has power when in any gear, this may have something to do with my problems...
  10. A

    Volvo L150F

    Have resolved this issue, the 5th accumulator on the top of the bank hadn't been changed. Fan is functioning just fine now.
  11. A

    Volvo L180F

    Yes, new (second hand) ecu has solved the problem, managed to get one from the same model.
  12. A

    Volvo L180F

    I have managed to track down a second hand one for a bit under half the refurb unit cost. They are very expensive here. I am unsure what would have caused the failure.
  13. A

    Volvo L180F

    Ok this one is solved, dead engine ecm . Anyone know if a truck one will work?
  14. A

    Volvo 4400

    I have a hard copy of the workshop manual, both the general one, and the transmission. Neither of them are really any help, they only run through removal and rebuilding of the trans, not any troubleshooting. I can confirm Source My Parts are good to deal with, and usually a lot more affordable...
  15. A

    Volvo L180F

    Separate loader question, L180 died the other day, started fine, moved about 30m then stopped. Seems to be getting no fuel. Will make some smoke with brake cleaner in the intake. I have bled every fuel line at every spot that i can find with no change. Is currently throwing error code MA2301-5...
  16. A

    Volvo L150F

    Hi All, Having an issue with hydraulic fan on loader. Cycles up and down in speed, both when idling and when doing a fan test, almost like the hydraulic flow is cutting in and out, but never cutting out enough for the fan to completely stop. Coolant temp stays around 76c according to dash...
  17. A

    Powerscreen Belt Problem

    I have current parts and operation manual if you are still looking.
  18. A

    Portable screener

    I run two Powerscreen 1400's, tracked two deck, one for top soil and one for very fine sand. Both run 40mm top deck, and 8mm aperture piano / harp wires for soil and 3mm for sand. One machine has just hit 9000 hours, the other 1500. Great bit of gear. I cant say for TPH as we run very fine but I...
  19. A

    Volvo 4400

    Hi all, further to my previous post, I thought it may be important to add the following details (and hope for comment..) The transmission oil does not appear to be getting hot. It has been changed and is clean. I have reconnected the factory trans temp gauge and it seems to correspond to an ir...
  20. A

    Volvo 4400

    Brains trust, I finally got around to putting a pressure gauge on the transmission cooler port today. What seems to be happening is that when the transmission disengages when hot, the pressure drops, like a relief valve has let go however when the engine is revved up the pressure resumes back to...
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