1. #1
    Randy Rester
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    Post Pump gear problems ?

    Has anyone had any problems with the electronic/air activated pump valves on 91 through 95 pumpers. Things like thinking you are in pump gear but still in road gear, ect. I don't want to give too much info, at this time, as not to influence anyones comments. I really need good, solid documentation; ie. make, model, year, pump type and problem. Please give info. so I can contact you. THANKS!

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    Randy Rester

  2. #2
    ADSN/WFLD
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    I've seen problems with both styles of transfer valves.

    On a 87 E-One, with a Hale pump, an air leak prevented the valve from fully engaging. We never had the vehicle "drive away" because the throttle light never went on and the engineer didn't run up the rpms.

    On a 82 Mack, with a waterous pump, a problem with the electric motor also prevented the engine from fully going into pump. Again the engineer noticed and didn't cause the engine to run away.

    Both engines are old but I suspect the same thing could happen when current models get older.

  3. #3
    pwc606
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    '93 Waterous. The motor that engages the transfer was not functioning correctly. It would partially disengage the drive line so when you went from pump to road it was grinding when you tried to drive away. Once the motor was replaced the problem was corrected. The repair tech said it was not "slamming" open or closed, it was dragging and taking to long.

  4. #4
    e1ffmedic
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    On a 95 E-One, Hale pump, it goes into pump gear just fine but it will not transfer back out sometimes. (air shift) Switching back and forth from pump to road a few times solves the problem, but it sure is annoying.

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    Quote Originally Posted by e1ffmedic View Post
    On a 95 E-One, Hale pump, it goes into pump gear just fine but it will not transfer back out sometimes. (air shift) Switching back and forth from pump to road a few times solves the problem, but it sure is annoying.
    That is usually caused by a few mishifts. Meaning going from pump back to road with the trans still in drive. It should work itself back in and work as normal but you only get a few get of jail free cards with that one.

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    Quote Originally Posted by ADSN/WFLD View Post
    I've seen problems with both styles of transfer valves.

    On a 87 E-One, with a Hale pump, an air leak prevented the valve from fully engaging. We never had the vehicle "drive away" because the throttle light never went on and the engineer didn't run up the rpms.

    On a 82 Mack, with a waterous pump, a problem with the electric motor also prevented the engine from fully going into pump. Again the engineer noticed and didn't cause the engine to run away.

    Both engines are old but I suspect the same thing could happen when current models get older.
    The year actually has a alot to do with it. your 82 has a vernier (cable) type pump throttle which doesnt have any interlocks to prevent the panel throttle from being used with the truck is still in road gear. Your 87 should be the same way unless it was an early Detroit with electronic controls (DDEC). Modern apparatus have many interlocks to prevent this issue so it is almost impossible. The exception would be PTO type pumps and or pump and roll setups as they can operate will in road.

  7. #7
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    ^^^ That has to be the oldest dead horse, to be resurrected.

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    Quote Originally Posted by FIREMECH1 View Post
    ^^^ That has to be the oldest dead horse, to be resurrected.
    I agree but you have to start somewhere.

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    What's perfect is, it is 8 years to the DAY. LMAO.

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    Quote Originally Posted by JREGANGFA View Post
    I agree but you have to start somewhere.

    perhaps start by posting in a current thread.

  11. #11
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    LMAO! Wow, Have another one.

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