Author Topic: Locked up radiator fan motor on 1992 K1  (Read 2813 times)

Offline noppo

  • ^ Motobrick Curious
  • Posts: 73
Locked up radiator fan motor on 1992 K1
« on: June 26, 2015, 11:41:56 PM »
K-Gents,

The radiator fan motor on my K1 has given out.  It's not entirely locked up, as i can turn it, but it's not smooth at all.  i have to put significant pressure on the blades to turn it.  So, it's gotta be replaced and i will do it myself.  If i go by the manual found on this site, it seems like i have to take the who fairing off.  My questions are:

* Is that correct?  Any way to get the fan motor out without tearing down the fairing?  i don't mind the tank and side panels and the like but the fairing .... don't wanna do it unless i have to.

* i read on this site that there are several alternative motors that can be used:

0130007-027  OR   0130007-304  OR   0130007-319

Which one is the right one for a K1?  What are the differences?  i don't want to buy a new fan assembly OR even get a used one unless i have no other choices. 

* Anything else that should be done while i'm at it?

* i will indeed add a switch for the fan going forward.  Any good handlebar switches you can recommend?  Or ways to use the switches on the bike already?  i have ABS and heated grips so i can't use those slots.

Would welcome a response.  Thanks! 
  • Tokyo, Japan
  • 1992 K1
:bmwsmile Noppo - Tokyo, Japan
11 months here, 1 month in USA (TN)

Offline Johnno

  • Curious
  • Posts: 3
Re: Locked up radiator fan motor on 1992 K1
« Reply #1 on: June 28, 2015, 01:09:00 AM »
I'm in a similar pickle to noppo.

My K75's fan doesn't run. I have tested the fan with another +12v feed and it DOES work.

I've done my best to check the wiring from the fan to the Temperature Switching Unit (TSU) and from the water temperature sensor to the TSU as well and it all appears to be OK.

Does anyone know how I can test the TSU to see if it's working properly?

I'd imagine a replacement TSU would be fairly expensive. I was recently quoted $160 NZD (about $110 USD) for a new starter relay, thankfully I have a mate who works at the local Mercedes Benz dealership and got me an identical one for $80!

Cheers!

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