| Author |
Message |
carl mci9
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, November 27, 2004 - 9:11 am: | |
With work sometimes when I have a problem and ask advice I don't have time to try all the advice that is given on this board. Thanks for all your help.
As stated in my posting the 8v71 had not been started for a couple month. When I tried to start it,it would turn over but slow(cold here in Ohio)> I then gave it s little shot of either and it almost started to run, I let off the starter to try again and then it would not turn over. I then came to you for advice. The batteries where completely up. When hitting the start button it only clicked.I then had some one look at the brake lights when I hit the start botton. they didn't even flicker(this meant that I must not be getting power to the starter moter. I removed the starter and removed the ispection screws and the brushes whe badly worn two spings where broken and two of the contact wires where out of the brushes. I don't know how it ever turned over the starter motor. I replaced the 8 brushes and springs, cleaned the armature with sandpaper tested the starter on my bench and it worked. I replaced it in the bus and the engine turned over faster than it ever has.
Thanks for all your advice and giving me and others the faith to try something new and learn.
This was a great lesson and it only cost me three hours of time and 14 dollars for new springs and brushes.
carl mci9 |
Earl-8-Ky
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, November 27, 2004 - 9:46 am: | |
You might want to pull your alt and go through it too. |
BrianMCI
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, November 27, 2004 - 10:23 am: | |
I am glad that you were able to repair your starter Carl, it warms my heart, so-to-speak.
Probably the greatest happiness I get as a mechanic is in rebuilding, and bringing back to life, DC motors that have gone belly up for some problem and were thrown away.
I think the reason for my enjoyment is that 9 times out of ten the problem with the motors are relatively minor, or at least minor enough that they are worth repairing.
In my business nowadays it seems that the mindset is geared more towards parts replacement than repair.
One note for others working on a DC motor, the majority of DC motors that go bad end up with the armature needing to be resurfaced.
This can be done fairly easily with sandpaper as Carl mentions but you do want to be careful to use fine sandpaper on the final few passes.
The armature needs to be as smooth as possible, in fact I have been known to use a buffing wheel to get a mirror shine on armatures in the past (if you do buff the armature, be sure to clean the armature afterwards to remove any jewelers rouge)
Brian |
Jim-Bob (Pd41044039)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, November 28, 2004 - 9:09 am: | |
Carl, the big sealed alternator does not have any brushes. You MIGHT want to remove it to check the bearings but if it's charging, that's all there is to check.
Jim-Bob |
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