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ASL300/RC-30 Loses power when digging.

Discussion in 'Mini Skid Steers' started by GlennD62, Dec 5, 2016.

  1. GlennD62

    GlennD62 Member

    Joined:
    Dec 5, 2016
    Messages:
    7
    Location:
    Holden
    Hello all,
    This is my first post, so many apologies in advance.
    My Polaris ASL 300 which I have been told is the same machine now as the RC-30, is that correct? Well, I have had it for about 7 years and really can't complain, I have two buckets and a backhoe attachment, which digs wonderfully, usually.
    Recently, the machine started giving me this issue. I start it as usual. Warm day, start it up, let it idle for a bit while I get things lined out to dig. But now, everytime I start to use the hydraulics to operate the bucket, either the backhoe, or just the regular scoop bucket, it causes the engine to start idling down. And if I put too much of a load or strain on it, it will even stall out the engine. Now I can coax it along and get it to dig, but not well. Also, as I am driving across the lot, if I am moving along, and put too much into the steering, it will cause the engine to slow down. Any amount of use on the hydraulics causes the engine to idle down.
    Any suggestions on what to look for or what to try? I use to have a good manual for this machine, but about a month ago, I had a fire and lost my house, my garage, my shop and everything in it. I am fairly good mechanically, I can follow your directions well. It just might take me a bit to go out and get the tools needed to do the repairs.
    I thank you all in advance.
    GlennD62
     
  2. Ronsii

    Ronsii Senior Member

    Joined:
    Jun 26, 2011
    Messages:
    517
    Occupation:
    s/e Heavy equipment operator
    Location:
    Western Washington
    When was the last time it had a fuel filter change?
     
  3. GlennD62

    GlennD62 Member

    Joined:
    Dec 5, 2016
    Messages:
    7
    Location:
    Holden
    I changed all of the filters this past summer thinking that this might be part of the problem. It didn't make a difference.
     
  4. dljbelle

    dljbelle New Member

    Joined:
    Mar 13, 2014
    Messages:
    4
    Location:
    Wisconsin
    Poor hydraulic circulation will also add additional strain to the engine.
     
  5. Delmer

    Delmer Senior Member

    Joined:
    Jan 4, 2013
    Messages:
    4,116
    Location:
    WI
    Two options the way I see it.

    First option, tee a pressure/vacuum gauge into the fuel supply line to the injection pump and see if the pressure drops from idle to loaded.

    Second option, assume the fuel supply is blocked and pull it apart to find out where. Drain the tank, suck it out with a vacuum and/or "suck bucket", and blow out and take apart as many fittings as you can.
     
  6. GlennD62

    GlennD62 Member

    Joined:
    Dec 5, 2016
    Messages:
    7
    Location:
    Holden
    I will give this a try as soon as I get it running and can keep it running.
     
  7. dljbelle

    dljbelle New Member

    Joined:
    Mar 13, 2014
    Messages:
    4
    Location:
    Wisconsin
    Make sure the auxiliary pedal isn't stuck on somehow and check to see if the fuel shut off lever wasn't knocked partially closed by the throttle linkage.
     
  8. DIYDAVE

    DIYDAVE Senior Member

    Joined:
    Feb 18, 2007
    Messages:
    445
    Location:
    MD
    If you google around, there is a manual, for the engine, perkins 403d, available, as a free download. Sounds like a fuel delivery issue, start at the tank, and work your way to the pump. Also look for bad hoses, clamps, filter, pickup tube, in the tank, and finally injector pump. I have over 2500 hrs on mine, and have done it all... Also check the hyd solenoids, under the foot plate...
     
  9. Coastiebro

    Coastiebro Active Member

    Joined:
    Dec 28, 2015
    Messages:
    36
    Occupation:
    Ex diesel mechanic now contractor
    Location:
    New Zealand
    Is the water trap - pre filter not blocked, they are in a #$%^ of a place and often get over looked, I found out the hard way. On my PT 30 it is on the LH side of the hydraulic tank under the fuel filler tube.