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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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Discussion Starter #1 (Edited)
I posted this in Glueckauf's thread on blower compartment maintenance. But perhaps that was not the best place :eek:

http://www.benzworld.org/forums/r-c107-sl-slc-class/1549655-560-sl-blower-motor-compartment-preventive-2.html#post5376927

As noted, the early cars have a different motor and it seems that the blower casing and the cable with plug are also different from later cars.

My casing is cracked,



It seems best option may be to do an epoxy repair. Motor still runs, so I will keep it.

Has anyone done a blower replacement on an early 107? If so:
- does newer blower fit into early casing?
- Is new motor adaptable to old style blower?
 

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Always Remembered RIP
1979 280sl 4 sp w/ac 1957 MGA 1998 volvo xc/70 2004 F150
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6,050 Posts
I'll pull the one on the 73 if you like Graham. I know the motor works, casing unknown.
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,340 Posts
Discussion Starter #3
I'll pull the one on the 73 if you like Graham. I know the motor works, casing unknown.
That's a great offer! Because I want to get car back on road and shipping from USA might take a few weeks, maybe I should try and do a repair first. Then if that doesn't work out....I will PM you!

Thanks again!
 

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Always Remembered RIP
1979 280sl 4 sp w/ac 1957 MGA 1998 volvo xc/70 2004 F150
Joined
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6,050 Posts
Well if Nobby gets off his lard ass (hope he's not listening), and drives down soon, I can send it back with him.
 

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R/C107 Moderator
1986 560SL: '84 500SL: '84 280SL 5 speed: other 107s
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32,359 Posts
Repair for now. Pull it when you store for the winter and repair at you leisure.
I posted pics of the difference many moons ago. My '72 is like yours and the '73 has plastic cages. I believe the cases are the same. The resistor pack attaches to the motor differently but still just two wires.
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,340 Posts
Discussion Starter #6
Repair for now. Pull it when you store for the winter and repair at you leisure.
I posted pics of the difference many moons ago. My '72 is like yours and the '73 has plastic cages. I believe the cases are the same. The resistor pack attaches to the motor differently but still just two wires.
Thanks! So, I can use a 73 and it will fit!

Lets see how the repair goes. Some satisfaction in fixing things like this anyway! But having a spare is reserve is a good thing!

BTW, found that link and your pic. I haven't taken the impellers off, but once off it should be relatively easy to install new brushes, if that is all that a non-functioning motor needs. Looks like those clips next to the copper choke coils hold the brushes in. Coils are likely to help stop radio interference.
.
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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Discussion Starter #7 (Edited)

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Always Remembered RIP
1979 280sl 4 sp w/ac 1957 MGA 1998 volvo xc/70 2004 F150
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6,050 Posts
On the 84 the brushes were ok but one spring was very weak, I used part of a cut off ball-point pen spring as a helper spring and it's been fine for 2 years. Did not remove cages.
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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Discussion Starter #9

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Outstanding Contributor
450slc5.0cab 280sl5sp 280se4.5 500se+500slAMG +250seStkW108 350sl4spdX3 500secEuro
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I have metal cages on my 73, and grabbed an extra from a junk yard. I have not investigated the motor mount and plastic casing, but it too might be damaged since I think I recall the motor being loose in the housing.
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,340 Posts
Discussion Starter #13
I have metal cages on my 73, and grabbed an extra from a junk yard. I have not investigated the motor mount and plastic casing, but it too might be damaged since I think I recall the motor being loose in the housing.
I've been looking at the casing all evening (while watching TV!) and haven't yet come up with a good way to fix the motor mount where the tabs that the clips fit have broken off. Maybe in the morning....
 

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'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,340 Posts
Discussion Starter #14
I am still looking at that housing :(. Several ideas but none very good so far. Plan on putting cover back on tomorrow and taking my time for a fix.

One kind BWer in Aus has offered to send me the casing from a 380SL blower. Anyone know if that will work with my 72 350SL motor/squirrel cages?
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,340 Posts
Discussion Starter #15
Well, I got the blower back together. Didn't take pics because being all black, it is not too photogenic. In summary, kind of a messy and inelegant repair. Haven't tried the blower yet, but motor seems to be held firmly.

Petesmga found a used blower for me on ebay for $50.00, but it got sold before seller could answer a question I asked.

I would like to get a good replacement, but not at the prices on ebay for used ones. I have a great offer for a used housing only, but still have not found out if a 380SL housing will work. Maybe I should get it anyway!

PS:
What the problems were:
- Tabs on motor clamp were all broken off or cracked (that was cause of problem)
- Housing on either side of lowere 1/2 of clamp was cracked. Cracks extended almost all way through the base cavity.

What I did:
- Cut groove with Dremel in what was left of motor clamp tabs to accept edge of clips.
- installed a bolt across the bottom cavity to pull the cracks back together.
- Veed out the cracks
- applied JB Weld in crack areas reinforced with a layer of lightweight glass mat
- filled the lower cavity with JB-weld so that it surrounded the new clamping bolt and filled in the cracks in that area.
- cut slots in motor clamp so that I could install cable wraps.
- installed the clips on the now short motor clamp tabs
- installed cable ties in a way that would prevent clips from jumping off and also apply some clamping pressure
- applied jb-weld over slots and holes I had cut as well as in a way that would keep the cable ties in place.
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,340 Posts
Discussion Starter #17
Turns out mine was cracked also so I did the same bolt fix, motor works bot there's bearing play.
I forgot to mention - My motor was good. No A/C and stored for winter for many years, so not much blower use. No play in bearings and brushes have hardly any wear.

Once I get blower back in car, i will start to look for a spare.
 

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450slc5.0cab 280sl5sp 280se4.5 500se+500slAMG +250seStkW108 350sl4spdX3 500secEuro
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I forgot to mention - My motor was good. No A/C and stored for winter for many years, so not much blower use. No play in bearings and brushes have hardly any wear.

Once I get blower back in car, i will start to look for a spare.
Mine seized up and I freed it up with wD40. Good as new now. :rolleyes:

:)
 

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Premium Member
'72 350SL, '85 300D, '98 E320, '19 Subaru Outback (sold '14 GLK250)
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10,340 Posts
Discussion Starter #19
So, this morning, I installed the blower in the car but I made one mistake - I didn't test it before buttoning everything down! I had tested the motor alone while I had it out but it was powered off a spare battery.

I turned the ignition and blower switch on - Nothing :(:mad: It was about lunch time so took a break. Studied up the wiring diagrams, fuse location etc and went back out with my DVM ready to do battle.

Tried blower again and it ran just fine!

It was a very windy day here so lot's of background noise. The blower is so much quieter than it was, I thought it wasn't running :eek:

Anyway, that job is done.

(Now my ignition key will not turn on my 300D and I can't start the car :( )
 
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