From: bushman165s aol com via Elec-trak <elec-trak cosmos phy tufts edu>
To: elec-trak <elec-trak cosmos phy tufts edu>
Sent: Mon, May 25, 2015 5:54 pm
Subject: (ET) Fw: tractor
Did this make it through? I never received it the first time, so I'm sending again.
Chad
From: bushman165s aol com
Date: Mon, May 25, 2015 9:36 AM
Subject:Re: (ET) tractor
This is a permanent magnet motor with a centrifugal switch mounted inside. Once the motor is up to a certain RPM, the switch closes and allows the control system to put full voltage on the armature for third speed. Sounds to me like your switch has an issue, since the power pulse button works. The actuator for those switches are a failure point that can cause damage to the armature.
You did say, though, that you have 3 speeds with the wheels off the ground. This would indicate loose connections or a worn out contactor or master disconnect. Too much of a voltage drop at one or all places would not give the drive motor enough current to reach the RPM required to close the switch.
I would check those things first before looking into a centrifugal switch (actuator) issue.
Chad
Sent from my Virgin Mobile phone.
------ Original message------
From: Ray
Date: Sun, May 24, 2015 1:04 PM
Subject:(ET) tractor
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I have a B145 wheel horse and it does not want to move very fast. It loses power going up hills in L. I have checked the throttle switch and you can tell it is going in all three speeds with the wheels off the
ground.The batteries are fully charged and the mower deck runs fine while cutting the lawn.I have checked for power between the frame and batteries and there is no draw with a light bulb or
meter.It does pick up speed with the power pulse button pressed. Is it possible that the drive motor is getting weak. Any help would be greatly appreciated.
Thank you
Ray
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