Re: (ET) Still working on my ET problems

[Paul and Sue Abendroth <pabendro gemair com>]

At 01:55 PM 6/4/03 , Roy Vanderhoef wrote:

> and what looks like a black capacitor.

This is probably the surge suppressor (VR-1). On the 15, I think, it is 
across the field of the drive motor (wires 10 and 44), and makes a good 
place to measure field voltage. Wires 6 and 11 provide + / - 36 volts to 
the REV relay, and the relay applies it one way or the other to the field.

It sounds like you have no field current in reverse. Since you have it in 
forward, the most likely cause is the relay. When you manually actuate the 
relay (with the power off) you should see the top leafs move a little as 
the middle ones move down, then see the bottom ones move a little when the 
middle ones get to them. This action causes a wiping effect and is intended 
to keep pressure on the electrical contact, and also keep the contacts 
clean. If not, you can carefully push near the attachment end to make it 
so. The contacts are silver, so shouldn't be filed but pulling a post-card 
thickness paper through might make the contact more reliable.




Paul and Sue Abendroth
pabendro gemair com
our permanent address is pabendroth dma org