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treequip

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Posts posted by treequip

  1. Thanks Andy,

    What's it do? Or how's it work?

     

    The black plastic square with the wire (there are 2 in there 1 live 1 earth) is called a coil pack.

     

    When the coil gets or looses a voltage the field change and/or an internal spring moves a magnet inside that's connected to the operational part of the valve.

     

    In simple terms when it gets a voltage the valve sends pressure to the operation (feed rollers)

     

    In the UK, chipper controls need to "fail safe" so the usual default (no voltage) system sends the hydraulics back to tank. When the valve gets a voltage it sends the hydraulics to the operation (feed rollers). Its why you have to press a button to start the rollers on most modern chippers.

     

    Chipper owners with a machine problem often look to the wiring under the assumption that they ought to find a live. This will only be the case if the reset button has been pushed.

  2. Sorry to hijack this thread, but same machine, what's this to the right? (Little brass screw/valve?)

     

     

    [ATTACH]213525[/ATTACH]

     

     

     

     

    Edit, or ontop as this photo is posted sideways

     

    You have nailed it in one, its a valve with a little brass screw in it

     

    To be more accurate its the solenoid actuator for the hydraulic valve.

     

    Its the business end of the stress management and any in feed emergency stop

  3. Hi,

     

    Does anyone know how to retention the feed roller spring as the roller seems to slip on smaller stuff, is it the two nuts at the bottom of the machine?? If I adjust it can I do any harm, can it be over tightened?

     

     

    Thanks in advance for advice.

     

    Sent from my S40 using Arbtalk mobile app

     

    What machine is it, slipping on small stuff could be because the roller is blunt

  4. To operate a tree surgery outfit you need to go big enough.

     

    In an ideal world you would get a tipper and a small chipper, you cant operate competitively without a chipper of some sort. With the tools you have and perhaps a saw or two, you could be up and running with a freelance climber in short order. You can learn a lot by observation.

     

    If money is an issue I would scale back the tickets to cross cut and fell and buy a chipper and tipper. Other certification can be taken on, as and when.

  5. I did notice a lot of certification requirements, even for ground guys, which is good and bad nice for them to now more, but here, my guy knows how to run a porty, knots, saws, sharpening, and he doesn't have to spend money on certs to drag brush, it still pay for him to know stuff, he brings more of his own stuff, like a truck to haul away wood, and I pay him more.

     

    The certification thing grew out of the fear of getting sued and we learned ambulance chasing from the USA when Thatcher de regulated the insurance industry

     

    No one to blame but yourselves I am afraid :laugh1:

  6. yes, when you bolt the sawmill onto the chassis, it ceases to be a trailer and becomes a piece of specialist plant, or an agricultural implement. A trailer is designed to carry a load, and be easily loaded and unloaded, would you class a caravan as a load carrying trailer.....same reasoning,

     

    Can you point me to the legislation that says that so I can print it off please

  7.  

    the intercooler just means you can run more psi =boost on your turbo keeping the charge temps low so the engine does not prematurely detonate.

    More turbo boost = more power.

    Nope, most of that is wrong. Adding an intercooler wont mean you can run more PSI. The pressure the turbo makes is a function of its geometry, its a usually fixed constant. The intercooler simply means the air getting to the cylinders will be cooler (hence the name), dense air holds relatively more oxygen than warm air and more oxygen just means a cleaner burn, unless you start messing about with the pump. Don't do this if you don't want to be picking bits of con rod out of the gutter. :laugh1:

     

     

    You can adjust the actuator to keep the waste gate to stay open longer adding more psi............

     

    Closed, you want the waste gate to stay closed, open waste gates make for slow engines.

     

    Again, you cant add pressure but tinkering with the waste gate may give turbo pressure for a second or two longer on lift but it is a second you don't actually need because you lifted.

     

    The waste gate is there to regulate turbo pressure and primarily to relieve it when needed. An open waste gate is the nice whooshing sound performance cars make on throttle lift. When you lift, fuel stops and there is temporarily no need for all that nice cold air so the waste gate opens and "wastes" it to atmosphere, get back in the pedal and the gate closes and restores the max air flow. "Wasting" it stops the turbo blowing hoses off the air system.

  8. A suitable intercooler wont add turbo lag.

     

    Adding an intercooler will feed the engine with cooler (denser) air allowing it to get the best out of the fuel its currently getting.

     

    It would make it cleaner but in itself its unlikely to make much power difference unless you tweak the pump to add more fuel.

     

    That would be like giving your granny a pair of running shoes, she will do it but for how long??

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