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  #1  
Old 11-19-2006, 06:47 PM
Tabor
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blower motor repair

So, my wife's blower motor went out in her W116.

After verrifying that the blower motor (and not some other part of the HVAC) was indeed broken, I checked fastlane. $904 with the cage, $345 without. Since I there was no harm in doing so, I dissasembled it to find worn out brushes.

Tommorow when I go to the hardware store, it will be fixed for $10.

Behr and Bosch can do some stuff that isn't appropriate for this forum.

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  #2  
Old 11-19-2006, 07:06 PM
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I have fixed W123 blower motors with appliance brushes, they wont last as long but so what, just put in another pair
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  #3  
Old 11-19-2006, 09:33 PM
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cdplayer

Quote:
Originally Posted by Tabor View Post
So, my wife's blower motor went out in her W116.

After verrifying that the blower motor (and not some other part of the HVAC) was indeed broken, I checked fastlane. $904 with the cage, $345 without. Since I there was no harm in doing so, I dissasembled it to find worn out brushes.

Tommorow when I go to the hardware store, it will be fixed for $10.

Behr and Bosch can do some stuff that isn't appropriate for this forum.
I have a 1984 W126. Not long after I acquired this vehicle I need to repair the blower moter and the resistor group. My problem was caused by years of dust build up in the blower housing. This in turn caused the blower motor to drag and the resistor group to over heat.
After I removed the blower housing I found the cage to be dirty but otherwise in perfect condition. Just near impossible to take off.
The motor was a mess. New had to be better.
I ordered online a new motor (no core) from DriveWire. Cost $114.70 and free shipping to my door.
Supporting the cage between two stacks of books, allowing the motor to dangle in the space between the books, a couple of sharp strikes with a punch and hammer on the motor shaft freed the cage from the motor.
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  #4  
Old 11-19-2006, 09:44 PM
Tabor
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Quote:
Originally Posted by cdplayer View Post
I have a 1984 W126. Not long after I acquired this vehicle I need to repair the blower moter and the resistor group. My problem was caused by years of dust build up in the blower housing. This in turn caused the blower motor to drag and the resistor group to over heat.
Mine was FULL of dust. I mean full. You couldn't have crammed anymore in.

Quote:
After I removed the blower housing I found the cage to be dirty but otherwise in perfect condition. Just near impossible to take off.
Drivewire wants $285 for mine sans cage.

To get the cage off, what I found worked good was to:

1. Clamp motor in vise.
2. Remove metal clip that looks like it hold the cage on the motor shaft but probably isn't doing anything in actuallity.
3. Have an assistant pull up on the cage while you tap the top of the shaft with a punch and hammer.
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  #5  
Old 12-02-2006, 10:57 AM
Tabor
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Got the brushes yesterday. I couldn't find the right size local, so I had to order them. Helwig Carbon makes them and the part number is 82-313111, they come in packs of four. They are 0.312" x 0.312" x 1", but you will need to shorten them to reassemble the motor. I got them from graphitestore.com and with Thanksgiving it ended up taking exactly one week for them to ship, but I don't blame them. The motor works!

EDIT- But graphitestore.com will only sell them to you eight at a time.
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  #6  
Old 12-02-2006, 11:24 AM
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I took my extra apart last night, trying to get one to go into the 240. On mine, I pulled the plastic "body" of the fan assembly off, leaving the motor can and squirrel cage. I then set it on vice, motor down, with cage resting on a block on both sides. Tapped motor shaft with punch, basically driving motor and shaft from squirrel cage.
I don't know about yours, but my motor can was not held in place with screws, but the can "lids" had tabs, 3 of them, and the corners were folded with a punch to overlap the can. Hard to visualize, pics maybe to follow.
I didn't have but about 6mm left on the brushes, but am letting it ride at this time. My problem was the tightness of the shaft in the bushings on both ends. Went into "fan repair mode" and got those freed up, cleaned and lubed.
When reinstalling the motor end, some of the punched and folded corners grabbed, some broke off. We'll see if it holds......
Are all the motor cans/cases like this?
Spins very freely now......
Attached Thumbnails
blower motor repair-dsc01910.jpg   blower motor repair-dsc01907.jpg   blower motor repair-dsc01908.jpg   blower motor repair-dsc01909.jpg  
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Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John

Last edited by JimmyL; 12-02-2006 at 11:30 AM.
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  #7  
Old 12-02-2006, 11:54 AM
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I believe that Fastlane has the replacement brushes.
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  #8  
Old 02-09-2007, 02:53 PM
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I have a 126 300SD 1982, and the blower finally works well with the newly polished fuse holder and fuse. HOWEVER, it squeaks! Help. how hard is it to remove and lubricate the motor? can it be done? are the squeaks permanent? I plan to practice on my 83SD parts car. post a link to a DIY or Pictorial hopefully if there is one.
HELP! I am going insane with the squeaking...
John
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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!
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  #9  
Old 02-09-2007, 05:03 PM
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I have not had to do anything on mine, yet. But, that squeak sounds like dry bearings.
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  #10  
Old 02-10-2007, 08:16 AM
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um, anybody know how to wet them?
John
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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!
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  #11  
Old 02-10-2007, 01:22 PM
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Quote:
Originally Posted by vstech View Post
um, anybody know how to wet them?
John

Ummm, see post #6 above.......
I also find it handy to use gun cleaning kits with the tubular brushes just slightly larger than the fan bushing you are cleaning. Then I buff with scotchbrite and lube with Zoom Spout oil (available from most hardware stores)

http://www.happcontrols.com/cleaning_maintenance/29103300.htm
http://www.zoomspoutoiler.com/

Trust a fan guy on this one.....

The absolute best stuff to use is Royal Purple, iso 68 I believe (equivalent to about 15wt). No debate will be allowed on this point!

**edit**
You must disassemble fan/can to clean and lube the bushings and armature shaft. Proper metal or fiber washers is very important also. Armature should have a little play up and down, but not a big gap, and certainly not snug.
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'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
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  #12  
Old 02-10-2007, 01:37 PM
vstech's Avatar
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thanks fan guy...
where would the "proper washers" and such be aquired? and what do I do about excessive play?
also, I, being an a/c tech, have the zoom oil in my tool box, but with a/c motors there is a tube and resivoir to hold oil, I did not see any such in the pictures above. is cleaning and oiling going to be sufficient? I would think that cleaning and lubing with a pasty grease would be more long life... buy you being the fan guy should be the final word.
John
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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!
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  #13  
Old 02-10-2007, 10:08 PM
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Quote:
Originally Posted by vstech View Post
thanks fan guy...
where would the "proper washers" and such be aquired? and what do I do about excessive play?
I bought a kit several years ago of fiber washers. I have seen smaller kits at Harbor Freight. I also imagine Lowes or Home Depot might have similar. The number of washers takes up any excess play of the armature.



Quote:
Originally Posted by vstech View Post
is cleaning and oiling going to be sufficient? I would think that cleaning and lubing with a pasty grease would be more long life...
I can't remember, but I think there is some wicking around the bushings, which will soak up the oil and provide lubrication through the bushing. I put quite a lot of oil in the are around the bushings.


Quote:
Originally Posted by vstech View Post
by you being the fan guy should be the final word.
John
Well, it's not like I can tell you how to rebuild the transmission.....

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'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
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