Was just leaving a parking lot onto the main street, noticed I'd lost my power steering , then my alarm went off "LOCOOL" showed on the Odometer display. I could faintly smell anti-freeze. Pulled into a parking lot, shut 'er down, popped the hood and saw that the fan pulley had separated from the spindle on which it was pressed.

Anyone else ever have this happen ?

I did the upgraded clutch to Hayden & plastic fan. I wonder if I loosened the press on fit by trying to remove the nut the wrong direction but that was done 12,00 miles & 9 months ago, but I really don't think that is possible. I thinking of modifying the interface with a set screw or welding the spindle to the pulley housing behind the big fan nut. Fan bracket bearing seems fine, nice & tight, no play.

The spindle is easily tapped in and out of the pulley with a small hammer. Not an interference fit at all.

Just turned 80,000 miles.
Part numbers involved fan bracket, 5142661AB, radiator 5174154AB

Thoughts ??

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Dennis
Considering sound advice, invent your own solutions
CRD

Never seen or heard of this happening on a CRD I would try getting a hold of Hayden and reporting it to them. You might get lucky and they might pay to fix it.

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My CRD Build Thread
Soon to Come:more lights

You are not seeing the picture. Forget the fan & clutch, put them both in the trunk of the car, that's NOT where the failure is.

You looking in the engine compartment. You're looking at the thing (fan bracket, part # 5142661AB) that the fan clutch screws onto.
That "thing" is a pulley on a shaft (spindle).
The pulley came off the shaft/spindle. The spindle is still fixed to the front of the engine.
Then ..... the fan hit the radiator.

_________________
Dennis
Considering sound advice, invent your own solutions
CRD

Here's a couple of links to a picture of the part. Notice a couple of things, look through the clear plastic thread protector you can see the spindle. Also note the allen set screw in the back, this holds the bearing pack and spindle onto the main housing. The spindle is pressed into the bearing firmly. The spindle is about 1/2 " in diameter & about 2-1/2" in total length. Once the allen is removed the bearing/spindle assembly can completely slide through the main housing in either direction. In my case, the allen was/is firmly in place.

http://lgcdn.jeep4x4center.com/media/ca ... b_2792.jpg

http://lgcdn.jeep4x4center.com/media/ca ... 1_7383.jpg

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Dennis
Considering sound advice, invent your own solutions
CRD

I understand the issue and have not heard of it happening. I have heard of the "plastic" insert inside the crank (dampener) pulley coming unglued so the speak. Based on your pictures I'd guess the set screw came loose. When doing a TB job it would probably be worth checking that set screw and maybe reseating it with Loctite, possibly the red. But that seems a silly design, see below.

Questions:
1. can you post pictures of what's left of your assembly?
2. seems to me in a proper design you have that bearing installed from the back so to speak and pressed in until it seats against a shoulder so it cannot come out toward the radiator and the set screws only function is to keep the bearing from spinning in its seat which implies there would be a recess for the set screw to engage in on the side of the bearing. What I cannot tell from the pictures is how the pulley is "attached" to the bearing. Looks to me like there is some sort of stud going thru the bearing that then attaches to the pulley so the stud serves as the spindle on which the pulley rotates. If that's the case then the bearing would still be on the pulley base with the spindle sticking out the front broken loose from the pulley.

Am I anywhere close?

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

From what I see, the best I can tell what caused this is the following. Somehow the belt came off the fan pulley and ended up wedged between the pulley & the pulley housing (towards the rear, engine block side) that is bolted to the engine block. The belt still had enough pressure/tension on it to keep turning/spinning. The turning action caused the belt to further wedge itself in while still spinning the fan by interference against the rear of the pulley. This action caused the pulley to spin/screw the pulley off the spindle on which it is attached.

So when the new replacement part arrives, here's how I will modify the new unit.
1st I will drill a hole (5/16" into the threads onto which the fan clutch nut attached. The drill will stop when it hits the hardened spindle shaft. I'll then center punch the spindle to make a mark on it. Separate the spindle & pulley (tap out with a hammer), finish drilling the hole in the pulley threads and tap the hole 10-32, grind a set point on the hardened shaft, reassembly & put in a 3/16" long allen screw with Lock-tite. Once the fan clutch nut is in place, the allen will be trapped (not able to unscrew) and will firmly hold the pulley to the shaft to prevent this from happening again.

On the old unit. I filed and ground corresponding notches on the face on the spindle & pulley and attempted to weld them together. Since the spot weld was so small and the metal of the components so different, I was not able to get the heat high enough to join them together to my satisfaction.

_________________
Dennis
Considering sound advice, invent your own solutions
CRD