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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 03-14-2003, 12:17 AM
Registered User
 
Join Date: Jan 2003
Location: Innisfil, Ontario, Canada
Posts: 93
pins to jumper for W140 A/C charge

I have a 1992 W140 300SD. My A/C compressor is not turning. IN the past (1987 300SDL W126) my A/C compressor was engaged 100% of the time, except in economy mode.

I believe that my system is low, I will verify with my gauges but If I need to what pins do I jumper to bypass the low pressure switch?

Is this onthe receiver drier as on the older MBZ? I did find a 3 connector plug. Low pressure and high pressure?

Also is there another procedure to charge/top up a A/C system?

thanks in advance
Steve
Reply With Quote
  #2  
Old 03-14-2003, 09:09 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Can't jump that switch as it is a variable resistor.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #3  
Old 03-14-2003, 09:56 AM
Registered User
 
Join Date: Jan 2003
Location: Innisfil, Ontario, Canada
Posts: 93
ok then, how do you enage the clutch to charge the A/C system?
Reply With Quote
  #4  
Old 03-14-2003, 05:45 PM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
We charge with pressure thru the HIGH side. You could disconnect the 3 pin connector at the clutch & jump the clutch to power.
Also when the drier switch sees 40-50lbs@sqin of pressure the compressor should come on.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #5  
Old 03-14-2003, 07:00 PM
Registered User
 
Join Date: Jan 2003
Location: Innisfil, Ontario, Canada
Posts: 93
Thanks I'll give it a try
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 02:19 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page