The "drive disc" spins freely in the housing except for the silicon fluid. 0000037348 00000 n Mack truck 2014 cxu613 mp8 .i replaced clutch fan controlled by air solenoid but now fan kick in 180 f till drops temp 150f on hill at high load.scr derating sign shows into dash but there is . endstream endobj startxref I fixed the pictures in my thread. A roaring noise could mean a number of things, including a bad wheel bearing, worn tires, or a differential that's low on oil. 14 0 obj <> endobj Next, locate the fan clutch bolted to the water pump in the engine compartment. -Determine if the fault is mechanical or electrical(and then follow the appropriate troubleshooting steps) . and A Transmission Fluid & Cooler Lines Flush, too? 77 0 obj <>stream Viscous fan drives | Variable speed fan clutch There is an air leak in the fan drive. gave the two in question a little twist with a fine nosed pliers. http://www.popularmechanics.com/cars/how-to/a302/1772922/, http://www.offroaders.com/tech/fan-clutch.htm, https://itstillruns.com/test-fan-clutch-5086903.html, https://www.2carpros.com/articles/how-a-clutch-fan-works, http://www.aa1car.com/library/cooling_fan_clutch.htm, https://club.autodoc.co.uk/magazin/how-to-check-the-engine-cooling-fan, https://www.2carpros.com/articles/fan-clutch-removal. Electrical faults don't have to be wiring, they can be control module input/output related including: Mooseman, post was a long time ago and not sure this is even active! 0000049576 00000 n All it does is freewheel and has no resistance. One smart strategy is to have your vehicles fan clutch and water pump replaced together. Locked-in fan clutch symptoms. These elements are natural in the process of Writing in a foreign language. The clutch is full of viscous fluid, so the air friction on the fan starts overcoming the friction of the fluid in the clutch and it stops accelerating with the engine. All browsing and transactions within are secured by an SSL Certificate with high-strength encryption. It would definitely do damage. this will apply to T1N sprinters as well as NCV3 equipped with a. Thanks for the quick response. Always check for manufacturer's specifications for any special procedures. They contain a drive and driven plate with annular grooves that fill with a thick viscous silicon fluid. A bad fan clutch can cause engine problems like excessively high temperatures and poor performance. We don't all go to a dealer to get work done right away. Viscous Fan Clutch Operation Symptoms - FreeASEStudyGuides.com 1988467. 0000002273 00000 n Truck Repair; Viscus fan on MP8 MACK engine on all the time, happened. It should turn smoothly with some drag. the cooling fan using a Hall effect sensor, which reads a reluctor track inside the fan clutch. Your vehicles fan clutch is an often overlooked but important little partits responsible for gauging the temperature of the air passing through the radiator and keeping the engine from overheating. 0000053141 00000 n All rights reserved. Viscous fan drive technology Precise thermal management that does so much more than keep engines cool. If your fan clutch is not operating the way it should, it's likely due to a fluid leak or a bad thermostatic spring or valve. Tuning and Understanding your Toyota Viscous Fan Clutch The oil flows to and from the main chamber as engine heat fluctuates, engaging and disengaging the clutch. endstream endobj 15 0 obj <>>> endobj 16 0 obj <>/Font<>/ProcSet[/PDF/Text]/Properties<>>>/Rotate 0/TrimBox[0.0 0.0 612.0 792.0]/Type/Page>> endobj 17 0 obj <>stream 3000000/10000 adobe:docid:photoshop:2ce534b1-d8a3-11d8-a54e-a63691f3af4c Found loose internal connections at the harness connector on the clutch and tightened them up a bit. http://gmtnation.com/forums/threads/dtc-p1481-electric-fan-clutch-inop.12899/#post-412028, https://gmtnation.com/forums/threads/chasing-gremlins.20197/, Try to stop the fan using a rag like in the video below, Hold it for a little bit. 4294967295 Fan Clutches for Commercial Vehicles - SACHS - ZF Friedrichshafen Try it again but pull the fan relay. As the engine speed increases, the blades of a flex fan change their angle. 1 0 obj<>/Metadata 259 0 R>> endobj 2 0 obj<> endobj 3 0 obj<> endobj 5 0 obj null endobj 8 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>/Properties<>/MC1<>>>>>>> endobj 11 0 obj<> endobj 18 0 obj<> endobj 44 0 obj<>stream Develop the tech skills you need for work and life. Search by part number to find a replacement for your fan clutch. Virtually any on- or off-highway engine can benefit from viscous cooling technology. Thank you! References. Clutch slipping and eventual failure are normal with time. Hmmmmm.. that truck looks awfully familiar. this is a brief video to show a simple diagnostic test to see if you have a fan clutch that has failed to produce torque. Hold your hand a few inches away from the vent so slight variations in temperature will be more noticeable. If the ground breaks it's the same. A bum fan clutch drains horsepower from the engine to keep the mechanical fans running, which can ultimately lead to critical overheating, decreased fuel economy, and poor general performance.
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