Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 04-15-2008, 12:52 PM
Registered Hack
 
Join Date: Mar 2008
Posts: 4,642
Alternator sparks?

I know they often spark inside.. just electricity in and around the brushes; but why would they spark outside the aramture? ANd is this dangerous with ehaust fumes in the engine bay?

Reply With Quote
  #2  
Old 04-15-2008, 01:56 PM
bustedbenz's Avatar
Registered User
 
Join Date: Feb 2007
Location: Lexington, NC or Boone, NC
Posts: 2,272
Quote:
Originally Posted by jt20 View Post
I know they often spark inside.. just electricity in and around the brushes; but why would they spark outside the aramture? ANd is this dangerous with ehaust fumes in the engine bay?
Diesel fumes aren't particularly explosive, unlike gasoline fumes... but it's probably still something that shouldn't be happening.

One of the electricians will know why.
__________________


http://www.appstate.edu/~salleyms

"What could possibly go wrong?"

~Michael S.~ -
1986 M-B 300SDL, retired due to rust and electrical problems. Donated engine to:
1987 M-B 300SDL, odo dead. New project.
1982 M-B 240D, odo stopped at 308,000
1982 M-B 300SD, 175,000
1989 Dodge Ramcharger, 87,000 - 4wd, 318
Reply With Quote
  #3  
Old 04-15-2008, 02:38 PM
rrgrassi's Avatar
mmmmmm Diesel...
 
Join Date: Jun 2006
Location: Royse City Tx
Posts: 5,122
Check your brushes and armature. If the copper braid is contacting other things, you can see sparks in other places.
__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 133K miles-replaced the other '06 that quit after 300k miles. (did not catch the bad cam in time)

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 195K

90 Dodge D250 5.9 Cummins/5 speed. 400K
Reply With Quote
  #4  
Old 01-26-2009, 06:15 PM
Registered Hack
 
Join Date: Mar 2008
Posts: 4,642
There was a nut in the rear section bouncing around !!
__________________


Last edited by jt20; 01-26-2009 at 06:21 PM.
Reply With Quote
  #5  
Old 01-27-2009, 03:17 AM
hey_allen's Avatar
greasy fingered tinkerer
 
Join Date: May 2006
Location: Tacoma, WA
Posts: 728
My SEC's alternator had the inner bearing cage of the rear bearing wandering around the rear of the alternator.

No undue noise from the bearings, and the only indication I had that something was wrong was when it turned on all the dash warning lights, as well as the fuel tank empty light for one minute, before going back to normal operation. Pulling the brush holder to check the brush condition, I found the bearing cage leaning against the commutator rings.

When I split the case to figure out what was going on, all the little balls fell out on the workbench!

__________________
-Josh
Testing the cheap Mercedes axiom, one bolt at a time...
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 09:24 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page