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  1. Mic Bailey

    PPM ATT400 - Electrical Swivel

    Thanks for this BillG, that is a good idea! Any ideas how I can find out if there are any spares? Each wire goes into a 4 or 5m length of harness and then into a large plug either end , one plug into the turret and the other into the main drivers cabin. I guess i will need to start with a...
  2. Mic Bailey

    PPM ATT400 - Electrical Swivel

    We've done some further investigation and managed to open the swivel/ slip ring up (see attached photo's). Unfortunately it looks as though there was a big short somewhere that caused part of it to be burned out. We are not sure whether we can repair /clean this up back into working...
  3. Mic Bailey

    PPM ATT400 - Electrical Swivel

    The horn/hooter was coming on constantly and it started when we were slewing the crane clockwise, so we disconnected it at the blower under the front cabin dash. Also the outrigger retract function began to come on constantly.
  4. Mic Bailey

    PPM ATT400 - Electrical Swivel

    Thanks for your help and response. I have since had a call from Terex Uk to confirm that shorts in this device are quite common and especially in humid conditions (which we have where I am) which cause a kind of algae to form inside the swivel.. He explained how to remove the unit which is a...
  5. Mic Bailey

    PPM ATT400 - Electrical Swivel

    Hi there, We have a PPM ATT400 crane (Serial No. 139626) that is having problems with electrical shorts within the wiring harness that passes through the swivel from the Turret to the main Carrier frame. We've dropped what I think is the "electrical swivel" from the bottom of the crane and...
  6. Mic Bailey

    PPM ATT400 - Electrical issues

    Hi there, We are experiencing weird faults with our PPM ATT400 mobile crane. The turret hooter/horn came on and remains on all the time, foot switch is ok, so we wondering if there may be a short somewhere. Only temporary solution we found was to remove the relay R4 (see photos bottom right...
    • Mic Bailey
    • Thread
    • #att400 #electrical #ppm #relays #terex
    • Replies: 0
    • Forum: Cranes
  7. Mic Bailey

    Groaning main cylinder on PPM ATT 400

    Hi, the main boom cylinder on our PPM ATT400 mobile crane is groaning at two different angles as it is extended or retracted. The groaning vibration type noise can be really loud, especially when the fluid heats up. In the mornings it tends to be quieter. Also the cylinder rod has black rings...
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