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 > Car Audio and Multimedia

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-20-2006, 04:24 AM
Registered User
 
Join Date: Aug 2005
Location: Palmdale/Ventura, CA
Posts: 813
W123 antenna not fully down or up

I tried to check all the archives for antenna stuff first.

Once before I had done a new mast so knew it was easy.

Current antenna does not fully extend, or go all the way down.

1. I pulled out the mast and cleaned and lubed until it moved
very smoothly, seemed like little effort.

2. Pulled a power antenna unit from a donor car. Unit looked almost
new inside.

3. Installed power motor into car before inserting mast.

4. Noticed that with antenna switch "down" or off motor runs and stops.
But when power is on (antenna switch up) power motor just keeps
running and running and running. Like it did not have a top setting
or fully extended setting. This made me thing that it was controlled strictly
by resistence. It is a clutch style, not the belt version I had read about.

5. Used the standard mast replacement method of inserting white antenna
lead while hitting antenna down, fed right in, just not all the way down.
Do antenna up and it goes up, down and it goes about halfway.

6. So... I removed power antenna again, opened it. Thinking that it is set
at bottom of travel. I hold open a little spring clip and insert the mast
all the way into the motor body manually. Now I figure I am fully inserted,
bottom of travel, no problem.

7. Reinstall into car, turn on power, move antenna switch from down to up.
It does not fully extend, and when I go back down, does not fully retract.
I was suprised it did not go back down all the way, that's where it started.

I thought maybe the mast is causing enough resistence that it is signaling
the motor to stop, so a new mast might solve this.
But maybe the motor has some true bottom or top of travel and I inserted
the mast when I should not have.

Before I replace the mast, or maybe the whole unit - any one ever gotten
inside one of these ?

Thanks in advance.

Reply With Quote
  #2  
Old 01-20-2006, 05:21 AM
Diesel Giant's Avatar
Registered User
 
Join Date: Oct 2004
Location: Loganville/Atlanta
Posts: 2,156
Hmmm that may be a good idea for a pictorial.
__________________
1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair
Reply With Quote
  #3  
Old 01-20-2006, 06:38 AM
rg2098's Avatar
Detailing Moderator
 
Join Date: Jun 2004
Location: Rochester Hills, MI
Posts: 2,415
Try adjusting the big gold nut on the outside of the wheel a few turns and see what you get. I had the same problem and I think playing with that fixed it.
__________________
Adam Lumsden
(83) 300D
Vice-President of the MBCA International Stars Section
Reply With Quote
  #4  
Old 01-20-2006, 11:33 AM
Registered User
 
Join Date: Aug 2005
Location: Palmdale/Ventura, CA
Posts: 813
That would be adjusting the tension on the clutch I suspect.

Tonight I plan to run the antenna motor with the cover off to observe
what it is doing.
Reply With Quote
  #5  
Old 12-11-2007, 05:44 PM
beaulieub's Avatar
Registered User
 
Join Date: Jun 2006
Location: Alton Bay, NH / Yuma, AZ
Posts: 203
I just had the same problem with my 79 SD. I found that with the radio on, the mast only extended maybe halfway. So, then I pressed the antenna UP button and the mast extended fully. When I turned the radio off, it only came down about half way. Again I turned the radio on, then pressed the UP button and finally got it to travel the correct distances when the radio goes ON/OFF.

Bert - NH

__________________

1979 300SD 83k miles Astro Silver Metallic/Black leather #3447
1990 350SDL 202k miles (3L engine from an 87 300D)Black/Grey leather
2006 Pleasure-Way Class B MoHo (Sprinter chassis) 134k miles
2005 E320CDI 270k (car is sooo fast - I can't believe it's a diesel!!!)
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 06:56 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page