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 03-14-2016, 10:59 AM
Zacharias's Avatar
Not so amused
 
Join Date: Apr 2010
Location: West Quebec
Posts: 4,025
w123 blower motor -- two questions

I recently changed my '85 300d blower motor as it was gradually slowing down after running for a few minutes. I swapped it out without thinking about it too much. Shortly after my climate control panel (dash controls) gave out and I changed that unit too.

The replacement used motor runs fine but on cold mornings when I hit bumps before the heater is blowing hot... it makes a LOUD squeal like nails on a chalkboard.

Two questions:

1. What is the issue with the original blower motor that was slowing down after a few minutes? Brushes worn?

2. What's up with the "new" motor? It sounds like the cage is making contact with the enclosure walls... but I examined it before installing and it seemed nice and tight, no play or wobble in the shaft. What is causing the noise? Bearing loose and allowing the shaft to float?

Thanks
__________________


Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
Reply With Quote
  #2  
Old 03-14-2016, 11:43 AM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 27,913
Was the replacement a new motor or a used motor?

If it was a used motor either the bearings need to be replaced or lubricated.

Also some have Bosch Motors but mine has a Siemans (Seimans?) Motor in it.
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #3  
Old 03-14-2016, 01:26 PM
koooop's Avatar
Registered User
 
Join Date: Mar 2016
Location: So. Cal.
Posts: 421
Thread hijack here! PO hooked the blower motor up in my '81 240D to the sunroof circuit (fuse d). What would be the correct amperage for the fuse to just the blower motor?

Sorry, seemed like someone looking at this thread might have the quick answer.

Thanks

Sorry again, I got nothin' on that blower motor issue...
__________________
1981 240D Four on the floor, Orient Red over Parchment, bought with 154,000 but it's a daily driver and up to 175,000 miles, mostly original paint and all original interior.
Reply With Quote
  #4  
Old 03-14-2016, 09:02 PM
Registered User
 
Join Date: Mar 2005
Location: SoCal
Posts: 658
Quote:
Originally Posted by Zacharias View Post

Two questions:

1. What is the issue with the original blower motor that was slowing down after a few minutes? Brushes worn?



Thanks
Could be a worn out commutator.
__________________
'85 300D Cal 280,000 miles
'07 C230 37,000 miles
Reply With Quote
  #5  
Old 03-15-2016, 10:17 AM
Zacharias's Avatar
Not so amused
 
Join Date: Apr 2010
Location: West Quebec
Posts: 4,025
Quote:
Originally Posted by Diesel911 View Post
Was the replacement a new motor or a used motor?

If it was a used motor either the bearings need to be replaced or lubricated.

Also some have Bosch Motors but mine has a Siemans (Seimans?) Motor in it.
Sorry, should have been more clear. Used motor.

The style of motor in my car has a casing that doesn't suggest it was meant to be opened. Any suggestions on how to lube the bearing?

I do not remember if the motor actually had a brand name on it.

I can post a pic if needed.
__________________


Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
Reply With Quote
  #6  
Old 03-15-2016, 11:45 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 27,913
Need more info. The Bosch Motor has the brushes in the rear and there is I think 2 threads on how to get into them and change the Brushes.

DIY Links by Parts Category - PeachParts Mercedes ShopForum

If you have a seimens motor the Brushes are up front and you need to remove the Blower Cage to get at them.

Also when I took mine apart it had a lot of dirt and dead bugs inside rubbing against the motor innards.
__________________
84 300D, 82 Volvo 244Gl Diesel

Last edited by Diesel911; 03-16-2016 at 12:05 AM.
Reply With Quote
  #7  
Old 03-15-2016, 11:54 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 27,913
Quote:
Originally Posted by koooop View Post
Thread hijack here! PO hooked the blower motor up in my '81 240D to the sunroof circuit (fuse d). What would be the correct amperage for the fuse to just the blower motor?

Sorry, seemed like someone looking at this thread might have the quick answer.

Thanks

Sorry again, I got nothin' on that blower motor issue...
If it is still there you have a Fuse chart in the lid of the Fuse Box. It sohould tell you what amperage the Blower Fuse is.
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #8  
Old 03-16-2016, 01:11 AM
koooop's Avatar
Registered User
 
Join Date: Mar 2016
Location: So. Cal.
Posts: 421
Quote:
Originally Posted by Diesel911 View Post
If it is still there you have a Fuse chart in the lid of the Fuse Box. It sohould tell you what amperage the Blower Fuse is.
Unfortunately the fuse box lid I have does not match the fuse box. The chart on the lid does not even show fuse d ( for the nonexistent sunroof ) however my fuse box does have a fuse d and that's what's currently running my blower motor.
__________________
1981 240D Four on the floor, Orient Red over Parchment, bought with 154,000 but it's a daily driver and up to 175,000 miles, mostly original paint and all original interior.
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 10:32 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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