Guru
Joined: 15/07/2006
Location: AustraliaPosts: 676
| Posted: 12:07pm 07 Jul 2010 |
We have discovered how long a set of brushes lasts. This double shaft motor was fitted 347555. Speedo reading now is 384868. That is 37313km on the set of brushes. I would recommend changing them sooner than this. I run out of brushes, 3 car lengths from the traffic lights, in peak traffic. I just had to push it off the road. The Hilux is sign posted too. The word Electric on both sides and rear, as well as “Drive by Nature” and the website written on the vertical board at the front of the tray. Here is shot from our day at Eco Expo. You should be able to see the signage.
A little embarrassing, but at least we now know how far the brushes will go.
I pulled the motor out to check the coupling washers. All in good condition. Should get plenty of Km’s out of them.
I have read a bit about advancing the motor to get a bit more power out of it. Big mistake. So all those considering the same thing, I hope you read this post first. I advanced it about 6 degrees. There was no increase power, but reduced, and lasted only 9km. After dismantling, 2 comm bars were evidently effected and somewhat raised. Black burn marks further in on the armature.
I removed the armature and spun it on the lathe. Cut a little on comm bars and can be seen in the pic. The shiny patch has been machined.
Then I machined the lot down till round again. There was about 0.5mm difference between the high and low patches. In this pic you can see 2 of the burn areas.
I put it all back together. The motor still runs, but has a lump in a 4 quadrant spacing around the full revolution. I have ordered a new armature. I have also taken this one to a motor rewiring business here in Mackay. It will be interesting to see if it can be rewired. They were going to have a look at it and get back to me.
Here is a couple of pics from either end of the field windings.
Trev @ drivebynature.com