ADVrider

Go Back   ADVrider > Bikes > Thumpers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-16-2006, 06:42 AM   #1
98rxcmi OP
Chrome+Paint=Garage bike
 
Joined: Sep 2005
Location: 03 640 Adventure
Oddometer: 126
03 640 adv fan switch

Can someone tell me how many bars on the temp guage you see when the fan kicks on. Mine got 2 bars from the top and it never came on. The red light never came on...but I was too chicken to let it go any higher. I jumped the switch with a short section of wire and the fan works so it has to be the switch.

Thanks
98rxcmi is offline   Reply With Quote
Old 04-16-2006, 07:56 AM   #2
gunnerbuck
Island Hopper
 
gunnerbuck's Avatar
 
Joined: Nov 2005
Location: N.V.I, B.C.
Oddometer: 3,728
I also have an 03 Adventure and like you the fan has never kicked on. The engine runs at a steady 4 bars and only a couple of times has it jumped to 5. I checked the fan to make sure it was working and it was o.k., so either the sensor isn't working or the engine has never been hot enough to kick the switch. According to the manual 5 bars is 90-99 c {194-211f} which still, I'm assuming, isn't hot enough to kick the sensor switch on to activate the fan. Have any 640 owners had the fan kick on at 5 bars? Thinking about it ,the upper end of 5 is near boiling so the the fan should be kicking on before 6 bars is reached, but then how accurate is the display unit anyways? Maybe some Adventures display a steady 3 bars at operating temp. Anyways , it may not be a bad idea to wire in a manual switch to the fan just in case the sensor switch is faulty, probably something in the index on that.

gunnerbuck screwed with this post 04-16-2006 at 08:14 AM
gunnerbuck is offline   Reply With Quote
Old 04-16-2006, 10:58 AM   #3
creeper
Still alive...
 
creeper's Avatar
 
Joined: Dec 2003
Location: Puget Sound
Oddometer: 10,718
Quote:
Originally Posted by 98rxcmi
Can someone tell me how many bars on the temp guage you see when the fan kicks on. Mine got 2 bars from the top and it never came on. The red light never came on...but I was too chicken to let it go any higher. I jumped the switch with a short section of wire and the fan works so it has to be the switch.

Thanks
My fan comes on after the fifth (194F) bar has lit and just before the sixth (212F) bar lights... so depending on which you believe to be accurate, the thermo switch (185F switch point) that turns the fan on, or the bar temperature indicator, my thermo switch is about 10 degrees late, or the indicator is 10 degrees early.
Either way, it's proven to be all fairly consistant in it's inaccuracy, and I've never seen the seventh (230F) bar light up, nor have I had the radiator cap open (248F) to release pressure.

Since switching to a 50/50 mixture rather than the 60/40 mix of antifreeze and water about 15 months ago, I think the bike runs a bit cooler, as it very rarely runs above the fourth (176F) bar anymore.

C
__________________
So... how's tricks?
creeper is offline   Reply With Quote
Old 04-16-2006, 10:45 PM   #4
Drif10
Accredited Jackass
 
Drif10's Avatar
 
Joined: Jun 2003
Location: Gates of Moscow
Oddometer: 45,303
I run a lot of tight woods with mine, and felt that the fan came on too late, so I wired a switch up on the dash and when I get into the tight stuff, flick it on and the guage stays steady @ 3 bars. YMMV.
__________________
I guess your get up and go needs a coffee. - Drif5
Drif10 is offline   Reply With Quote
Old 04-16-2006, 11:31 PM   #5
creeper
Still alive...
 
creeper's Avatar
 
Joined: Dec 2003
Location: Puget Sound
Oddometer: 10,718
Quote:
Originally Posted by Drif10
I run a lot of tight woods with mine, and felt that the fan came on too late, so I wired a switch up on the dash and when I get into the tight stuff, flick it on and the guage stays steady @ 3 bars. YMMV.
How you got that wired Drifty... as a bypass or as the only way the fan comes on?

C
__________________
So... how's tricks?
creeper is offline   Reply With Quote
Old 04-17-2006, 06:09 AM   #6
meat popsicle
Ignostic
 
meat popsicle's Avatar
 
Joined: Feb 2004
Location: Circumlocution Office of Little Dorrit
Oddometer: 14,132
Badmunkie's wiring diagram for a fan switch HERE; I thought there was one other but I can't locate it.

Fans in general:

Quote:
Originally Posted by 2003 640a Manual
Cooling system
Coolant is circulated by a water pump located in the engine. When the
engine is cold the cooling liquid circulates only through the cylinder and the
cylinder head. After the engine has reached its operating temperature (about
70°C, 158°F), the thermostat opens and the cooling liquid is also pumped
through both aluminum radiators.

Air blowing in through the radiators cools the cooling liquid. The slower the
speed of the motorcycle, the less the cooling liquid is cooled down. Dirty
radiator fins also reduce the cooling efficiency.

If little or no air blows through the radiators, for example when riding
through slow traffic or waiting at traffic lights, the coolant temperature will
rise. If the coolant temperature rises to 85° C (185°F), the fan 1 on the left
radiator will switch on.
This fan will provide additional air circulation through
the radiator thereby preventing the cooling system from overheating.

! CAUTION !
The red cooling liquid temperature warning light 2 will begin to light up, if
the cooling liquid temperature reaches approx. 110°C and henceforth has
exceeded its normal operating temperature.


Possible causes:
– riding slowly with a large load at a higher air temperature:
If possible increase your running speed, so that more air can blow
through the radiators. Should the warning light still be on off after 300
meters, stop immediately, switch off the engine and look for other possi-ble
causes.
– Too little cooling liquid in the system:
Let the engine cool down, and check the system for leakage’s. Also
examine the cooling liquid level CAUTION SCALDING HAZARD! Do not
drive on, until there is sufficient liquid in the cooling system. Go to your
nearest KTM garage and get it seen to. If you drive with the cooling
liquid temperature warning light on, you will cause even more damages
to the engine.
– The cooling fan on the left cooler is not working:
The cooling fan must be running, when the cooling liquid temperature is
110°C and the ignition is on.
If the fan is not working, and there
appears to be sufficient cooling liquid, the only thing you can do is to
drive on to your nearest KTM garage at the least possible engine load.

WARNING
IF POSSIBLE, ALWAYS CHECK LEVEL OF COOLING LIQUID WHEN ENGINE IS COLD. IF YOU HAVE TO OPEN THE RADIATOR CAP WHEN ENGINE IS HOT, USE A RAG TO COVER THE CAP AND OPEN SLOWLY TO RELEASE PRESSURE.

A mixture of 60% antifreezer and 40% water is used as cooling liquid.
How-ever, the anti-freeze protection must be at least -25° C (-13° F). Aside
from antifreezing protection, this mixture also provides great corrosion pro-tection which is why it must not be replaced by pure water.

! CAUTION !

FOR THE COOLING SYSTEM, USE ONLY HIGH-GRADE ANTIFREEZER (MOTOREX ANTI-FREEZE). USING LOWERGRADE ANTIFREEZE AGENTS, CAN CAUSE CORROSION AND COOLANT FOAMING.

Pressure induced by heating of the cooling liquid in the cooling system is
controlled by a valve in the radiator cap 3 ; a water temperature rising up to
120° C (248° F) is admissible, without fear of problems.
So the easiest way to check the fan is to let the idiot light come on so you know for sure you are in the temp range where the fan MUST be on. It is supposed to come on much earlier, so try this:

1) let the bike idle in the driveway until the light comes on
2) did the fan kick in much earlier?
3) when the light comes on hit the kill switch but leave the bike on
4) is the fan on?
5) last try, use a bit of wire to bypass the thermostat as mentioned below.
PS - did you check your coolant level?

Or you can use the troubleshooting method (mentioned above):
Quote:
Originally Posted by KTM troubleshooting (from manual)
Fan defective
Check if fan operates properly. To do this, start the engine,
then bypass the connections to the thermoswitch (bottom
right radiator), contact a KTM dealer
IMO coolant display legend on page 10 of the english section of the 2003 640a manual. Too bad they didn't translate it into oil temps...
__________________
Kronreif Trunkenpolz Mattighofen LC4 640

Its not so much staying alive; its staying human that counts.

meat popsicle screwed with this post 04-17-2006 at 07:00 AM Reason: logic
meat popsicle is offline   Reply With Quote
Old 04-17-2006, 07:04 AM   #7
gunnerbuck
Island Hopper
 
gunnerbuck's Avatar
 
Joined: Nov 2005
Location: N.V.I, B.C.
Oddometer: 3,728
Hey Drif 10 , how many bars were showing when your fan finally kicked on? What about on your 03 meat? It would be kinda nice to see what the average fan kickon guage reading is, I think 98 RXCMI is looking to see if his functioning properly by comparing to other results . I'll let mine go up to 6 to see if she kicks on, if not I guess I'll wire in a switch. Like Creeper says there is a 10 degree discrep. and probably the guages that read a steady 3 bars as normal operating temp kick the fan at 5 bars and the ones that run at 4 kick at 6 bars.
gunnerbuck is offline   Reply With Quote
Old 04-17-2006, 09:38 AM   #8
gybeman
Studly Adventurer
 
gybeman's Avatar
 
Joined: Apr 2003
Location: Ontario, Canada
Oddometer: 619
2 bars showing if moving normally. 3 if its slower or hot out. Fan comes on at 4.
__________________
2008 GasGas TXT250, 2009 Aprilia Shiver, 1974 Montesa Cota 247, 1969 CL350 restoration in progress)
Fairly recent gone and missed: 1999 VFR800, 2002 640 Adventure, 2006 GasGas EC300
Old history: a mixed of about 30 other dual sport, street, MX and trials
gybeman is offline   Reply With Quote
Old 04-17-2006, 09:45 AM   #9
meat popsicle
Ignostic
 
meat popsicle's Avatar
 
Joined: Feb 2004
Location: Circumlocution Office of Little Dorrit
Oddometer: 14,132
Quote:
Originally Posted by gunnerbuck
Hey Drif 10 , how many bars were showing when your fan finally kicked on? What about on your 03 meat? It would be kinda nice to see what the average fan kickon guage reading is, I think 98 RXCMI is looking to see if his functioning properly by comparing to other results . I'll let mine go up to 6 to see if she kicks on, if not I guess I'll wire in a switch. Like Creeper says there is a 10 degree discrep. and probably the guages that read a steady 3 bars as normal operating temp kick the fan at 5 bars and the ones that run at 4 kick at 6 bars.
It's been awhile since I checked or had it come on, but I think mine was operating as the manual showed - it should be on by 5 bars. Of course I have no idea if your bike's temp display works the same way as my model. So I don't think an average 'fan on' temp display reading would be appropriate.

Here is the 03s factory calibration from the owner's manual:
__________________
Kronreif Trunkenpolz Mattighofen LC4 640

Its not so much staying alive; its staying human that counts.
meat popsicle is offline   Reply With Quote
Old 04-23-2006, 09:04 AM   #10
gunnerbuck
Island Hopper
 
gunnerbuck's Avatar
 
Joined: Nov 2005
Location: N.V.I, B.C.
Oddometer: 3,728
My fan finally kicked on thru the sensor for the first time yesterday. Was doing some tight trailriding { lotsa slow tractor stuff} and the fan kicked on a couple of times while the guage was in the five bar zone, at no point did it reach six.
gunnerbuck is offline   Reply With Quote
Old 05-02-2006, 06:23 PM   #11
98rxcmi OP
Chrome+Paint=Garage bike
 
Joined: Sep 2005
Location: 03 640 Adventure
Oddometer: 126
man that's hot

I got it to kick on (the fan that is) this weekend. I was on the second bar from the top. When it did it rapidly went back down to 3 bars from the top. The red light never came on. Sure wish I could buy a switch that came on 20 degrees cooler. I haven't found it yet
98rxcmi is offline   Reply With Quote
Old 05-02-2006, 09:33 PM   #12
gunnerbuck
Island Hopper
 
gunnerbuck's Avatar
 
Joined: Nov 2005
Location: N.V.I, B.C.
Oddometer: 3,728
Looks like your fan kicks in at about the same reading as mine, my engine wasn't to terribly hot , no boilovers or steamshows with the rad cap pressure relief popping. I am satisfied with the way the system is working on my machine as is but I may still add a manual switch just in case.
gunnerbuck is offline   Reply With Quote
Old 05-04-2006, 10:13 PM   #13
meat popsicle
Ignostic
 
meat popsicle's Avatar
 
Joined: Feb 2004
Location: Circumlocution Office of Little Dorrit
Oddometer: 14,132
Quote:
Originally Posted by 98rxcmi
I got it to kick on (the fan that is) this weekend. I was on the second bar from the top. When it did it rapidly went back down to 3 bars from the top. The red light never came on. Sure wish I could buy a switch that came on 20 degrees cooler. I haven't found it yet
As I recall synthetic oils are stable to temps far in excess of the ~200 degrees that triggers the fan (I think that is still marginally safe with dino oils, but I will have to dig up the discussion - unless its indexed?).

But perhaps you have other info and could say why you want the fan to kick in sooner?
__________________
Kronreif Trunkenpolz Mattighofen LC4 640

Its not so much staying alive; its staying human that counts.
meat popsicle is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
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

Forum Jump


Times are GMT -7.   It's 11:27 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014