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Runaway Accelerator

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  • Runaway Accelerator

    The other day we had a one of our new (2006) engines go through a bay door. A preliminary investigation suggests that this in not a case of operator error but rather a malfunctioning accelerator. The apparatus in question is a HME/Smeal. A neighboring fire Dept. has had similar problems with Smeal apparatus. If anyone on these forums has ever herd of similar problems I would love to hear about it.
    DKK
    Truck Man
    APFD


    "Above all, an assignment to a truck company should be considered a promotion."

    Chief John W. Mittendorf-1998

  • #2
    We've had the gas pedal stick on our tower lader before. It's a 1980 Sutphen, so it may just be due to age. The driver was having to pull the pedal back up with his hand to slow the truck down. Just pull over and stop. It's not worth it to try and make it back to the station.

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    • #3
      Well, We had one get stuck in idel after pupm testing. It was an older engine, 1979 to be exact. I jumped in it an went to step on the accelerator to beable to stay at idel. Guess its good it got stuck there rather then at 45mph!!!

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      • #4
        Just a thought - Had anyone played with the throttle at the pump panel?
        "The uniform you wear was given to you. The respect that comes with it must be earned."

        Heretic
        Lieutenant
        Vermont

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        • #5
          What kind of revs are we talking about? Higher than normal or really friggin' high?

          If it is a slight to moderate increase it could be a poorly configured battery conditioner.

          Very high could be a number of issues. Being a 2006 I'll assume it is drive by wire (no accelerator cable). This could be an issue with the sending unit, the servo or a computer glitch.

          Another possible cause could be your pressure governor, I have seen this with the Pro-2.
          Last edited by E229Lt; 11-23-2006, 08:20 PM.

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          • #6
            Originally posted by E229Lt
            What kind of revs are we talking about? Higher than normal or really friggin' high?
            Here is the deal. After returning from a run (the pump wasn't used on this run. As a mater of fact the pump wasn't engaged all day since the morning check and they went out several times.) the operator noticed that he backed the rig in too far and was pulling it up a few feet when it just took off and ran through the door. When asked if he may have stepped on the "gas" rather then the brake he said he actually stood up with both feet on the brake pedal. He also said he looked down and made sure he wasn't standing on the "gas." He finally stopped the rig when he pulled the parking brake and killed the engine. I've been doing this job a long time and have had to deal with some of the best BSers in the business but in this case this a good kid and I believe him.

            I'd include pictures if I could figure out how.
            DKK
            Truck Man
            APFD


            "Above all, an assignment to a truck company should be considered a promotion."

            Chief John W. Mittendorf-1998

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            • #7
              Once again, it is a 2006. how long is it in service? Don't exclude the governor just because you weren't using the pumps. I had a runaway on the road and that was the determined cause. They swapped out the Pro-2 three times.

              So, what kind of governor is on this rig?

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              • #8
                That's one way to decrease your times.
                J
                It's not the size of the dog in the fight, it's the size of the fight in the dog.

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