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pump or wheel motor?

Discussion in 'Mechanic and Repair' started by mangojoe, Feb 2, 2008.

  1. mangojoe

    mangojoe LawnSite Member
    Posts: 14

    Is there any way to determine whether I have a bad pump or a bad wheel motor on my old Scag stz52?
  2. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,023

    The proper way would be to take it to a dealer and have them perform a pressure test on the system.

    The only other way I know of is swap the wheel motors from one side to the other and see if the problem changes to the other side.
  3. kjslawn

    kjslawn LawnSite Senior Member
    Posts: 618

    Yes tis will cost you about $60 but it will let you know
  4. mangojoe

    mangojoe LawnSite Member
    Posts: 14

    Thanks a lot
  5. razor1

    razor1 LawnSite Bronze Member
    Posts: 1,985

    Any hydro leaks? When my pump went bad it leaked excessively. :cry:

    Correct me if I'm wrong but don't pumps go up more often than wheel motors.
  6. Landrus2

    Landrus2 LawnSite Platinum Member
    Posts: 4,812

    When you have a problem like this. cross the lines from one pump to the other. you will pin point the problem rapidly.:drinkup:


  7. HenryB

    HenryB LawnSite Bronze Member
    Posts: 1,828

    That's a good idea.
  8. MowerMedic77

    MowerMedic77 LawnSite Bronze Member
    Posts: 1,164

    Well chew on this before you go moving wheel motors. Most manufactures with pumps and wheel motors are separate systems meaning the left side cannot contaminate the right side and vise a versa when there is a failure.
    What if your pump grenades and is sending metal down into your wheel motor causing both to go bad and now you take your good wheel motor and stick it inline with your bad pump to test and you now send the cr@p from the pump into the good wheel motor.
    Bite the bullet and take it to a reputable dealer who can pressure test your system and get you back up and making money.
  9. HenryB

    HenryB LawnSite Bronze Member
    Posts: 1,828

    How do you pressure test the pump an motor?
  10. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,023

    Your right MM,
    I felt a little funny when typing that part but for some reason it didn't soak in till you mentioned it. :hammerhead:

    Guess I owe ya one [​IMG]

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