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 ShopForum > Technical Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-02-2010, 05:55 PM
Registered User
 
Join Date: Mar 2010
Posts: 1
Another Clock Repair Question

Ok, so I read all the threads, and made a solid attempt at fixing the clock in my 1977 240D. Once I had it apart, it was obvious that the capacitors were toast (at least I think so) because they were all corroded.... so corroded in fact that I couldn't read the polarity markings on them. On the circuit board there were (-) marks one for each pole of the two capacitors. I replaced them with new caps from radioshack.... the ones that everyone uses, using these marks as a guide. NO LUCK. Is it possible that I have them in backwards? I've always heard that they will explode if put in backwards... but all of the other clock components seem to be in perfect shape, I checked the continuity between all the parts I replaced, and it is getting power. Any suggestions would be greatly appreciated.

Cheers!
Reply With Quote
  #2  
Old 03-02-2010, 06:25 PM
Registered User
 
Join Date: Oct 2009
Posts: 8
99% of the time is the capacitors. There are two and you should replace both. Good possibility that both or one is in reverse polarity. Try to trace from the 12 v pin at the back to the capacitors polarity with a ohm meter. The + should be connected there.
Reply With Quote
  #3  
Old 03-03-2010, 03:07 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,106
my 83 SD clock is not working, I pulled it out (I've been working on the odo gears, so out wasn't much problem) the caps looked fine, no swelling or leaking, but the TACH capacitor looked like a 10 year old AA battery left in a radio!!! really looked terrible.
I know a 240 has no tach, but do you think a hosed tach cap could affect the clock in mine?
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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 03:17 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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