Who is Dave? Are you referring to me?


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1983 123.133 California
- GreaseCar Veg System

Oops sorry, yes. Delivery Valve, not Dave. Who's Dave? Lol.

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Then I heard the voice of the Lord saying, "Whom shall I send? And who will go for us?" And I said, "Here am I. Send me!"

DeliveryValve,

Have you taken the fan motor apart to lube or replace the bearings? I took the plastic fan off by removing the 17 mm right hand thread nut, and 3 x 8 mm nuts off the motor but I was not able to get the top cover to move more than 1/16 inch. I didn't force it and lubed it and put it back together. I can see that it is a ball bearing on the nut end of the shaft. The other bearing is not visible.

Do you know what kind of motor it is? Does it have brushes or brushless?

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

No problem, I assume it was me. I just didn't want to step on Dave's toes.

Current condenser size is 22 x 16. I previously had a 22.5 x 14 parallel flow that also worked great. But I decided to go slightly bigger when I did my evaporator clean out and installed my cabin filter.


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1983 123.133 California
- GreaseCar Veg System

The upgraded fan spun beautifully. So I didn't do anything with it. Sorry I don't have any knowledge of the inner workings of the fan.


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1983 123.133 California
- GreaseCar Veg System

With a battery charger, I powered up/ down the fan a few times in a completely dark room and saw no sparks from the motor. Without taking the motor apart, I think it is safe to say it is a brush-less motor.

__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Here's the old 12" fan vs new 16" fan side by side. Both says "Germany". The 12" fan says Bosch (at outermost circumference). The 16" fan does not say the brand. There is a small logo above "Germany" (need to zoom in to see it). Anyone recognize the logo? There are capitalized letters A thru K in the inner circumference (going CCW direction). Not sure what they are for. Maybe for balancing?





Bosch motor.fan (thinner) on the left, no name motor/fan (thicker) on the right.

__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

I'd say they are brush-less also.


I think that no name fan is an ACM Germany fan. I know both Mercedes and BMW uses that manufacturer also as an OE.


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1983 123.133 California
- GreaseCar Veg System

My old 190e 2.6 had 2 of the 12" fans mounted side by side and my 87 300d had one 16" fan. Both looked identical as the ones pictured above. From my experience a single 12" fan is far more powerful than the 16" fan. So much so that I swapped out the 16" in the 300d for a single 12" I had left over from the 190e.

I went all electric cooling long ago (one pusher one puller) so I'm always looking for the most powerful fans I can stuff into the tight w124 engine bay. I might replace my fleabay puller soon with a pair if Prius puller fans.

Look at the circled logo on my fan, do you recognize it? It does not look like an ACM logo ACM Germany -- Welcome .

__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

16" diameter fan covers 43% more surface area of the condenser and radiator than a 12" diameter. The CFM of a fan, besides the fan diameter, also depends on the motor and what RPM the fan spins at, blade design, etc.

How did you determine your 12" fan is more powerful than your 16"? Have you tested both in actual cooling?

__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Yes I did. When I still had the 190e the 2 12" pusher fans were more than enough cooling for the 2.6 in any weather with the viscous fan removed. All I had to do was installed a colder temp switch. On the 300d my initial setup was the stock 16" aux fan plus a cheap eBay puller fan behind the radiator (there are very few electric fans that fit in front of the om603). The setup worked most of the time but on a few rare occasions like climbing steel hills at low speed or sitting in traffic in extreme heat, the temp gauge would creep up to 100c. With the 12" fan it doesnt do that under any circumstance.

The 2 12" pushed fans on my old 190e.
http://img.photobucket.com/albums/v242/tjts2/Green%20Mercedes/fans.jpg

And a single 12" fan swapped into the 300d
http://i.imgur.com/54walBe.jpg?1

PersonLly I prefer electric puller fans without any pusher because they're more effective but that's not really an option with the inline 6 engine.

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CENSORED due to not family friendly words

Fyi, if you are rebuilding the fan - assuming it is like my w123 bosch fan, you need to drill out 4 rivets to seperate the two plates that capture the bearing closes to the fan shaft. They actually may not be rivets, it looked more like castings that had been flattened. There's two more rivets that hold the electronics into the housing and capture the second bearing. I did not bother dismantling that, instead I just used some electronics cleaner then sprayed a heavy dose of white lithium grease into that bearing. Theres a thread in the parts for sale section that will probably help you source new bearings.

That is definitely not an ACM fan, it's a Bosch logo there.


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Attached Thumbnails

 

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1983 123.133 California
- GreaseCar Veg System

You're right it is a Bosch logo! https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=bosch%20logo

A forum member (Otto Huber) told me his 16" Bosch fan is 2- 7/8" thick at the motor and is from an 88 560 SEL and the p/n is 0005007993

I searched p/n 0005007993 at this site https://mercedespartscenter.com/parts/index.cfm?make=Mercedes-Benz&year=&searchText=0005007993&action=oePartSearch&siteid=215720 , that is how I learned the same p/n fan is used in other model and years and that is how I found my fan which is from an 87 190E 2.3 per the used parts wrecker I bought it from. My 16" Bosch fan is thicker at 3.75".

Funny that the same p/n fan can have different thicknesses. It seems the only way to identify the thicker fan from the thinner one is by measurement and by photos.

__________________
85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked