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Family compact

	Airstream Forums - Fan Clutch
		Besides aiding in cooling, the fan clutch also is a 'spacer' moving the fan blades in the proper position relative to the fan shroud.
		The fan clutch is mounted to the waterpump and the fan blades are mounted to the clutch, moving the blades 1 1/2" from the pump towards the radiator.
		It is possible to pull the fan clutch, by first unbolting fan from the clutch and then unbolting the clutch from the water pump.
	www.airstreamforums.com /forums/f159/fan-clutch-456-print.html (460 words)

	Info and facts on 'Fan clutch' (Site not responding. Last check: 2007-09-10)
		Fan Clutch refers to an automatic device frequently used in automotive (additional info and facts about automotive) cooling systems.
		However, if engine temperature climbs beyond the clutch's pre-determined setting, the fan becomes fully engaged, thus maintaining or lowering engine temperature.
		Most fan clutches are viscous (additional info and facts about viscous) or "fluid" couplings combined with a bi-metallic sensory system similar to that in a thermostat (A regulator for automatically regulating temperature by starting or stopping the supply of heat).
	www.absoluteastronomy.com /encyclopedia/f/fa/fan_clutch.htm (94 words)

	Electrically actuated viscous fan clutch - Patent 4271945
		When fan operation is no longer required, the electromagnet is automatically deenergized so that an internal spring moves the valve member to a closed position to terminate the supply of viscous fluid to the clutch to increase clutch slippage and establish the disengaged mode of clutch operation.
		Adjacent portions of the clutch plate 58 and the rear wall member 32 are provided with torque-transmitting elements consisting of cooperating annular ridge and groove elements 62 and 64, respectively, with an intervening fluid shear space 66 therebetween to accommodate a suitable viscous fluid, such as silicone, as a torque-transmitting medium.
		As is well known to those skilled in the fluid clutch art, upon rotation of the clutch plate 58 by the input shaft 16, via the pulley 14, torque is transmitted to the adjacent housing or output member 30 by the shear action of the fluid medium in the operating chamber 60.
	www.freepatentsonline.com /4271945.html (1879 words)

	Jeep 4.0 Dual Electric Fan Conversion
		The main fan is a 15" diameter viscous clutch fan that is mounted to an engine-driven pulley.
		The clutch fan is held onto the pulley studs by four nuts.
		The fan was wired up so that it was triggered by a second relay (I had a spare relay handy) when the A/C is switched on or when the engine temperature reaches 220F. You can add a switch to operate the fans* manually if you wish, but I didn't apply that option.
	www.angelfire.com /my/fan/electric.html (1154 words)

	Radiator Fan Blade And Fan Clutch - OEM Quality
		The cooling fan, or sometimes called the radiator fan, can be located on either side of the radiator and may either be operated by an electric motor or a fan clutch that is driven by the water pump belt.
		The cooling fan switch is a thermostatically controlled electrical switch that is usually located in the radiator or in the thermostat housing and will turn on the radiator fan when the coolant reaches a predetermined temperature.
		The fan clutch or radiator fan clutch uses the engine temperature to engage or disengage the radiator fan and is located on the front of the water pump.
	www.drivewire.com /replacementparts/coolingfan.html (289 words)

	Repairing Problems With Your (Chrysler) Imperial Fan Clutch
		The fan clutch is very short since the radiator is mounted very close to the engine with an almost non-existant fan shroud.
		In the middle of the fan facing the radiator is a coil, this coil is a "thermostat" of sorts.
		I have removed the 4 bolts from the front of the water pump pulley, and the 4 bolts from the viscous drive unit that the fan is attached to.
	www.imperialclub.com /Repair/Cooling/clutch.htm (1399 words)

	Spring engaged fluid released fan clutch for a live shaft - Patent 4355710
		A spring engaged fluid released fan clutch is disclosed.
		It is an object of the invention to provide a spring engaged fluid released fan clutch with which the fan load is substantially centered over a support bearing, and the clutch is mounted on a live shaft as compared to a conventional mounting on a stationary shaft.
		2 the clutch is spring engaged with the annular foot 28 of friction disc 22 in engagement with the friction facing ring 122 of annular piston 110.
	www.freepatentsonline.com /4355710.html (2153 words)

	BMW E34 Website
		Basically, the advantage of the fan clutch is a very small HP increase because there is no draw of power from the engine.
		You have two choices: Installing the fan directly onto the radiator (I would not advise to use the through the radiator straps, these fans are heavy and in time will bend the fins and the fan will sag) or installing it onto the fan shroud.
		To remove the fan shroud, there is two plastic pins on each side of the radiator that you have to remove.
	www.bmwe34.net /e34main/upgrade/electrical_fan.htm (475 words)

	ROCKETS: Clutch "The Rockets Bear" Index
		Clutch’s favorite pastimes are making people laugh, inspiring the Rockets and Rockets fans to victory, helping children make intelligent and future oriented decisions, and or course being lovable and huggable with kids both big and small.
		Clutch believes he won the award thanks to the support of his loyal fans (not because he voted for himself day and night for a year).
		Other Clutch creations that have been widely popularized and used throughout sports include mascot bowling, a game in which the mascot serves as ball and is shot down the court at 5 foot tall pins by a giant sling shot operated by 3 people, and mascot stilt boxing, self explanatory.
	www.nba.com /rockets/mascot/clutch_bear_index000504.html (853 words)

	PM: Saturday Mechanic - Fan Clutch Replacement (Site not responding. Last check: 2007-09-10)
		On most domestic-brand pickups and SUVs, the fan is held to the clutch by a circle of screws or bolts, and the clutch is threaded onto the water pump pulley by a large nut.
		On many imports, four or five bolts hold the fan to the clutch, and four or five hold the clutch to the fan pulley.
		If the clutch is held to the belt pulley hub by screws or bolts, use a plumber's strap wrench to keep the pulley from turning while you loosen the screws.
	www.popularmechanics.com /automotive/sub_care_sat/1772922.html?page=3&c=y (663 words)

	Engine - fan clutch (Site not responding. Last check: 2007-09-10)
		I didn't as installing the fan is time consuming and a complete installation kit costs about the same as a new fan clutch.
		As the clutch is made out of aluminium and the nut is made of steel they can't be welded together.
		Undo the three allen screws that hold the plastic fan blade to the fan clutch and remove the fan blade.
	bmwe32.student.utwente.nl /johan/fan_clutch/fan_clutch.html (624 words)

	PavementSucks.com - Truck Tech - Fan Clutch Replacement - Dodge, Ram, 4x4, 4 wheel drive, 4wd, off road, off-road, ...
		You need a 36mm fan wrench/open end or large adjustable wrench to remove the fan clutch from the wanter pump shaft.
		Although I unbolted the fan shroud at this time, it will be easier to perform the clutch removal first, then unbolt the shroud in order to move it around to pull the fan completely out.
		Once the clutch assembly is loose (with fan blades attached, unbolt the shroud if not already done and rotate it to make room to get the clutch and fan out.
	www.pavementsucks.com /tech/fanclutch.php (518 words)

	Parts Of An Automobile, What Is A Flywheel, Fan Clutch, Filler Cap, Brake Fluid Reservoir Cover, Frame Chassis, Fuel ... (Site not responding. Last check: 2007-09-10)
		The fan clutch is a small fluid coupling with a thermostatic device and controls a variable-speed fan.
		It ensures that the fan will rotate at just the right speed to keep the engine from overheating, and reduces drive to the fan when it is no longer needed.
		The flywheel forms one surface of the clutch and is the base for the ring gear.
	www.auto.indiamart.com /auto-part/autopart-f.html (679 words)

	Fan Clutch (Site not responding. Last check: 2007-09-10)
		I played with fan clutches back when I had a bad temp sender that drove me crazy - it was not the Toyota part, and it seemed to read fine at normal temps, then shoot up to the red when the engine was under stress.
		I still have the new fan clutch on the truck, and an assortment of old ones in the garage.
		I rechecked the fan's clutch and was unable to stop the fan in the field.
	www.barneymc.com /toy_root/techneek/fan_clch.htm (3474 words)

	Fan Blades and Fan Clutch Diagnosis and Repairs (Site not responding. Last check: 2007-09-10)
		The photo at right, kindly supplied by Ron Beckett, shows a RR fan on which a blade is cracked to a dangerous extent.
		You might find it easier to remove the hwhole fan and clutch assembly first, by unscrewing the large nut holding it on to the fan shaft protruding from the engine.
		The fan blades are attached to and driven by a special viscous fan clutch that provides maximum drive to the fan when the engine is hot and much less when it is cold.
	www.rangerovers.net /repairdetails/coolingsystem/fan.html (372 words)

	OldsPower.com - Fan clutch question
		I was told the heavy duty fan clutches are to tight for performance.
		All fan clutches have a viscous fluid (oil) inside them that couples the clutch shaft to the fan base.
		A thermal clutch operates in the same fashion as the regular clutch under normal operating conditions, but it has a bimetallic coil (similar to that in the carburetor choke housing) that opens a valve at higher temperatures and causes more drag.
	www.oldspower.com /vb/showthread.php?t=16878 (2019 words)

	Cooling Fan Clutch Rehab
		Since a replacement clutch lists for about $400 and sells for about $300, not many of us will replace it on suspicion alone, and there isn't a test that tell us whether it is slipping due to a loss of silicone fluid.
		Clamp the fan bracket to a work surface with the fan face-up in a horizontal position, leaving the fan free to rotate.
		(Be careful not to overheat and damage the fan.) This expands the air in the clutch, and moves the oil in the clutch to the outer edges.
	www.nichols.nu /tip482.htm (1358 words)

	The Quadratec Bulletin Board: CJ 3 core rad. and clutch fan
		When I switched from the 4cyl to the 258 I did not have enough room for the clutch fan, (with a 3 row radiator) so I put an electric fan on the front of the radiator.
		If you are tight enough on clearance that you have to ditch the fan clutch, then DO NOT run a flex fan.
		Fan is the same as a propeller, and if it encounters water, the flex fan will do just that, flex.
	bbb.quadratec.com /cgi-bin/ultimatebb.cgi?ubb=get_topic;f=32;t=000653 (407 words)

	UUC pulley install with clutch fan
		(My fan clutch was removed using a BMW special tool 32mm and a second standard 32mm wrench using fork end of regular wrench to wedge the pulley.
		The fan cover has a couple of plastic catches at the bottom of the front of the car.
		The trick is to get the fan cover properly lined up when dropping it in the car with the loose fan/clutch in the center.
	mywebpages.comcast.net /jns-johnson/pulleyinstall.htm (1193 words)

	Pirate4x4.Com - Fan Clutch Trail Repair (Site not responding. Last check: 2007-09-10)
		His engine fan clutch had quit working, and it was causing his motor to quickly overheat.
		Since they were out in the middle of nowhere, and a new fan clutch really wasn't an option, some sort of repair was needed.
		First, the fan and clutch must be removed from the vehicle.
	www.pirate4x4.com /tech/fan (229 words)

	Fan clutch - ShopForum (Site not responding. Last check: 2007-09-10)
		There should be no wobble or looseness in the hub on the fan clutch..
		As far as mine went, I just removed the 4 nuts that hold the fan to the water pump pully and removed the fan from the car and then removed the fan from the clutch.
		I changed the fan clutch on my 350 and did not pull the radiator.
	www.mercedesshop.com /shopforum/showthread.php3?t=9219 (1069 words)

	fan clutch - General Dakota Board
		And that roaring, depending on when you hear it, could be your fan clutch is seized up inside.
		The fan clutch will turn, it is not seized up.
		i'm certain that the problem is either/or the fan and fan clutch.
	www.dodgedakotas.com /boards/gen/580.html (309 words)

	Enjoy The Drive -- The Benefits of an Electric Fan
		Swapping from a stock fan and fan clutch to an electric fan can produce more power and better fuel economy.
		By replacing the stock fan and fan clutch with a Model 250 fan, the power to the wheels increased by 12 horsepower and 16 lb-ft of torque.
		According to Flex-a-lite, "If your car runs cool at 35 mph and does not overheat at highway speed, you are a great candidate for an electric fan." The company recommends covering at least 70 percent of the radiator core with the fan, although 100 percent coverage is the ideal.
	www.enjoythedrive.com /content?id=10081 (176 words)

	RV.Net Open Roads Forum: Class A Motorhomes: Fan clutch replacement
		The four bolts that hold the fan to the clutch could be reached using a ratchet.
		For what it is worth, on my Ford F-53, I was able to remove the fan off the fan clutch from the doghouse area and let it lay in the shroud and then could loosen 2 of the 4 bolts holding the fan clutch on.
		The correct fan clutch for my RV is #2797 which is a severe duty clutch with standard rotation.
	www.rv.net /forums/index.cfm/fuseaction/thread/tid/527379.cfm (1406 words)

	Woodalls Open Roads Forum: Class A Motorhomes: 1988 GM 454 fan clutch
		The fan on these non-air condition engines turned in what they call "standard rotation." When they added and air conditioning compressor to the engine, they wound the belt differently and the fan turns in what is called "reverse rotation." My problem is this: my local GM dealer only shows fan clutches operation in reverse rotation.
		I found a clutch, but the parts house said it was a severe duty.
		My original "83 454" had a 5 blade fan which was NOT e'nuf so cruising the yard a 7 blade was found from a air conditioned 454 truck, nice fit.
	www.woodalls.com /cforum/Index.cfm/fuseaction/thread/tid/14266712.cfm (785 words)

	Camping World Open Roads Forum: Tech Issues: Fan Clutch Cycling P-30
		My recommendation is to replace the clutch as I am not aware of any guarantee that the clutch will only fail on (at least it can still be driven).
		There's an aux electric fan on mine that switches on when the pasenger side cylinder head reaches 225 degrees, which corresponds to 210 on the temp gauge.
		This spring I replaced the antifreeze, thermostat, clutch fan, and went to synthetic trans fluid.
	www.campingworld.com /forums/index.cfm/fuseaction/thread/tid/766973.cfm (706 words)

	MoparPages - Your source for everything Mopar: Fan clutch diagnosis?? (Site not responding. Last check: 2007-09-10)
		When my dad went to a clutch fan on his 225 it started to over heat cause the fan was not always turning as fast as the direct drive and pulling as much air.
		I found out after replacing the fan clutch that the temp was better but only for a little longer time, then it would overheat real bad.
		If the radiator is cool and the engine is boiling, the fan clutch doesn't know it cause it's pulling air through the radiator and you could still be overheating and the fan clutch not kicking in all the way.
	www.moparpages.com /forums/showflat.php?Number=14114 (744 words)

	How I repaired my failed fan clutch >VERY LONG> - The 5 Series (E28) Message Board
		SITUATION: The fan clutch was engaging very late (coolant gauge needle at about 1/3 from the center towards full hot), and even then it could quite easily be stopped using the rolled newspaper test.
		There were no signs of leakage from the fan clutch.
		Right in the center of the fan clutch you will see a small copper / bras pin, about 5mm long and 2mm in diameter.
	bimmer.roadfly.com /bmw/forums/e28/forum.php?postid=4045081&page=1 (561 words)

	BMW Fan Clutch - BMW World
		Your BMW fan clutch uses a neat property called viscosity to either drive the fan or let it freewheel, depending upon the temperature.
		The BMW fan clutch is filled with a silicone fluid that thickens when it gets hot and thins when it's cool.
		As it ages, the fan clutch develops hairline cracks and the silicone fluid escapes.
	www.bmwworld.com /parts/bmw-fan-clutch-world.htm (250 words)

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