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  1. #1
    Forum Member jlcooke3's Avatar
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    Default DD60 Turbo Problem

    This is for all the guru's.

    The truck is 2005 Pierce Dash 105HD Aerial Ladder with a DD60 500hp engine. Occasionally, mostly noted when the apparatus has sat for a several hours, the turbo will not spool up for approx 30 secs or more. After the lag the turbo spools up and she's back to running like a scalded dog. Any ideas? This is not while in neutral. This is after placing the apparatus in gear disengaging the air brakes and responding to calls/going out. The truck does have Pierces' multi-plex system, I always start it the same way, turn on the batteries, hit the ignition switch, wait for it to go through it's system check, then engage the starter.
    Last edited by jlcooke3; 11-20-2009 at 08:26 PM. Reason: more info


  2. #2
    Forum Member FWDbuff's Avatar
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    We had a 2003 Pierce 3000gal pumper-tanker that had a similar problem. Turned out to be a collapsed lube line (incoming to the turbo) that wouldnt allow oil to pass efficiently until it had heated up enough to become more "fluid." It was under warranty, and they replaced both the line and the turbo itself (a preemptive strike) just in case if any debris from the line got into the turbo's shaft or bearings.
    Last edited by FWDbuff; 11-20-2009 at 09:21 PM.
    "Loyalty Above all Else. Except Honor."

  3. #3
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    We had in same issuses with several of our DD60 in Pierce Ladders, it turned out to be a improperly installed air line to a air tank that controls the turbo waste gate and egr valve. There is a TSB from pierce about this. It was reapired by our local Dietrot Dealer

  4. #4
    Forum Member FIREMECH1's Avatar
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    Do you have the variable type turbo on it??? If so, then you could have a problem with air pressure. It uses air pressure which goes to an electric controlled motor mounted on the p/side bell housing end which is controlled by the ecm on d/side.

    If your air pressure is low, about 80-90 psi, then you'll get a fair amount of lag in the turbo.

    If it's not a variable turbo, then FWD is spot on, or at least close.

    It's real nice to see that someone is waiting for the gauge sweep or system check before starting the beast.

    FM1
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  5. #5
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    Quote Originally Posted by FIREMECH1 View Post
    It's real nice to see that someone is waiting for the gauge sweep or system check before starting the beast.

    FM1
    I stand over people with a baseball bat!

  6. #6
    Forum Member jlcooke3's Avatar
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    It is a variable vane turbo (VVT). How do you check to see what part is bad? And where do you start looking?

  7. #7
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    Default Turbo Lag

    There is a TSB from Pierce about the air pressure problem. The air line was run wrong on many of there DD60s. We had several that had to be repaired

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