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Brian Vogel
Prolific User
Username: guyslp

Post Number: 167
Registered: 6-2009
Posted on Sunday, 23 December, 2012 - 02:51 pm:   Edit PostDelete PostView Post/Check IP

I believe I posted in October about the fan going into self-destruct mode and a piece of the shrapnel compromising the radiator.

Today I finally got back to working on LRK37110, removing the bottom part of the fan shroud, and getting the plastic fan (UE40358) separated from the viscous fan clutch. All indications are that the original fan clutch suffered a catastrophic failure allowing the whole fan to wobble and hit the radiator and causing it to break apart in the process.

Over the years at least two alternate viscous fan clutches have been identified for the original Shadow series with chassis number range 11111-26700: Hayden 2747, which cross-references to Four Seasons 36956. These have been used successfully by many.

I have seen information on a Jaguar fan clutch that's suitable for the T2/Shadow II and derivatives but have yet to see the actual part number ever specified.

Does anyone know of any alternates for the plastic fan itself and/or the viscous fan clutch on the "two series" cars?

Brian
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Randy Roberson
Frequent User
Username: wascator

Post Number: 76
Registered: 5-2009
Posted on Monday, 24 December, 2012 - 05:55 am:   Edit PostDelete PostView Post/Check IP

I seem to recall it was the same as an early 1970s Cadillac unit; I do remember that it was much harder to locate one for the Shadow I which I have, so I was happy when I found mine was working correctly.
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Brian Vogel
Prolific User
Username: guyslp

Post Number: 169
Registered: 6-2009
Posted on Monday, 24 December, 2012 - 08:28 am:   Edit PostDelete PostView Post/Check IP

Randy,

Then, perhaps, there are at least three different viscous fan clutch types used during the production of the Shadow series. I believe the earliest Shadows didn't even have one, though I definitely might be mistaken about that.

This is one of those parts that I cannot, in my wildest imaginings, believe that Crewe ever would have had "made to order" to be unlike others in use at their respective times of installation.

So far I have been told that a Jag or Triumph part and an Oldsmobile part (but still without the specific part numbers) are functional equivalents for the two series cars. I'll probably just take the thing off and in to my local NAPA and Federated parts warehouses and see what we can match up. If/when I have actual part numbers I'll post them.

As many of these parts become harder or impossible to find in their OEM versions, or the price becomes ludicrous, like over $100 US for the original main fuel filter the last I was quoted for one, knowing what we can easily obtain when needed, and that works, becomes critical information.

Brian
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David Gore
Moderator
Username: david_gore

Post Number: 1173
Registered: 4-2003
Posted on Monday, 24 December, 2012 - 08:29 am:   Edit PostDelete PostView Post/Check IP

Hi Brian, I recall helping to fit a Jaguar viscous fan clutch to a friend's Shadow during my "Self-Help Group" days. I just removed the Shadow clutch assembly, took it to a local Jaguar wrecker who matched it with the Jaguar equivalent - no part number or model details provided just a match on the counter. Fitted and worked perfectly - just changed the viscous fluid before installation as a preventative maintenance measure.

As far as the fan goes, something in my mind keeps prompting me that we could use an equivalent from a 1990's or thereabout Australian Ford Falcon. As this probably came from an international Ford parts supplier, you might check for an equivalent from a Ford Mustang, Ford F150 etc of that era. Again, a simple counter match at a wrecker sufficed with no mention that it was for a R-R/B.

Sorry I cannot be more precise - time is dimming the memory.......
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Brian Vogel
Prolific User
Username: guyslp

Post Number: 170
Registered: 6-2009
Posted on Monday, 24 December, 2012 - 08:36 am:   Edit PostDelete PostView Post/Check IP

David,

Thanks for these tips. They may certainly help me with my quest in the coming weeks.

Brian
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Randy Roberson
Frequent User
Username: wascator

Post Number: 77
Registered: 5-2009
Posted on Monday, 24 December, 2012 - 08:46 am:   Edit PostDelete PostView Post/Check IP

Brian, I found this:
Fan Clutch: Shadow I chassis 11111-26700 - Hayden 2747 also cross-referencing to Four Seasons 36956 ($47.79 from Rock Auto.) Rolls part# UE37061.
Hope it works out.
RR
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Brian Vogel
Prolific User
Username: guyslp

Post Number: 172
Registered: 6-2009
Posted on Monday, 24 December, 2012 - 08:54 am:   Edit PostDelete PostView Post/Check IP

Randy,

You'll notice I posted that information in my initial post on this thread.

I am already positive that the "two series" cars, which I believe began with chassis number 30001, do not use the same fan clutch (nor fan, for that matter) as the chassis number range quoted. Hence the reason for the search.
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Randy Roberson
Frequent User
Username: wascator

Post Number: 78
Registered: 5-2009
Posted on Monday, 24 December, 2012 - 12:35 pm:   Edit PostDelete PostView Post/Check IP

Sorry I did not notice it.
I looked at Flying Spares and there are three or four different units listed, but I was not sure if one was for a SZ car. There are photos of each if it would help.Some of the manufacturers' web sites for the viscous units have technical information including dimensions, as I recall from my searches.
RR
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Brian Vogel
Prolific User
Username: guyslp

Post Number: 289
Registered: 6-2009
Posted on Thursday, 14 March, 2013 - 01:33 pm:   Edit PostDelete PostView Post/Check IP

Well, I couldn't decide which of several threads to report my success on, but the title of this thread suggests that future researchers would probably look at it first.

I did end up successfully pairing the Hayden 2706 viscous fan clutch with a Derale 17120 fan.

The Derale fan and the Hayden clutch are both set up for the very common 3.25" fan bolt circle and 2.62" fan mount diameter, but there was a very tiny problem: The four "fingers" that center the fan on the Hayden clutch were just the tiniest bit too long at one corner of each finger. I used a dremel and a diamond cut disc in "nail file" mode to file each of those four corners just the slightest bit and the fan dropped on fine.

When I first encountered the problem I thought, well, let's try the Derale equivalent of the Hayden 2706, which is the 22026. The problem is that while the thing may be equivalent in terms of kick-in temperature, etc., it is not anywhere near to the same dimensionally, which is critical here.

If you are in the unfortunate position that I was where you need both a new fan and fan clutch, the above combination works perfectly. The pitch on the Derale blades is slightly greater than the original clutch and they are deeper, so you end up with about 2/3 of the blade within the fan shroud and 1/3 behind it. The OEM fan and fan clutch give the more typical 50/50 spacing.

If you are lucky enough to have your original fan, which has what appears to be an utterly non-standard mount hole pattern, an adapter ring like this one:
Fan to Fan Clutch Adapter Ring
can easily be made. Another owner this ring machined when he mated the original fan to a Hayden 2747 (which is 0.04" taller than the 2706 but with a lower fan mount height, which won't work with the Derale fan).

I didn't have my camera with me today, so I'll have to get photos later while I still have the hood/bonnet off of the car and you can see things well.

Brian
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Brian Vogel
Prolific User
Username: guyslp

Post Number: 298
Registered: 6-2009
Posted on Sunday, 17 March, 2013 - 07:23 am:   Edit PostDelete PostView Post/Check IP

Now, for the photos of my installation with the alternate fan blade set and fan clutch:

Derale 17120 Fan & Hayden 2706 Clutch

Derale 17120 Fan & Hayden 2706 Clutch

Brian
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Michael Hicks
Prolific User
Username: bentleyman22

Post Number: 113
Registered: 12-2011
Posted on Sunday, 17 March, 2013 - 07:39 am:   Edit PostDelete PostView Post/Check IP

theirs a bit of dirt on the third Nut
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Brian Vogel
Prolific User
Username: guyslp

Post Number: 299
Registered: 6-2009
Posted on Sunday, 17 March, 2013 - 11:41 am:   Edit PostDelete PostView Post/Check IP

How do you even know about that!! ;-)
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Brian Vogel
Grand Master
Username: guyslp

Post Number: 316
Registered: 6-2009
Posted on Sunday, 31 March, 2013 - 11:30 am:   Edit PostDelete PostView Post/Check IP

What I hope is now the final update on this particular issue/topic.

It appears that the pairing of the Derale 17118 metal fan clutch fan and the Hayden 2706 viscous fan clutch is truly the perfect fit. Gaining that extra inch of clearance at the end of the fan blades has cleared up all of the clearance problems with seemingly no significant change in airflow.

Now it's on to dealing with getting the hood/bonnet back on and moving the car after I return from an upcoming road trip to Texas.

Brian
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Brian Vogel
Grand Master
Username: guyslp

Post Number: 2374
Registered: 6-2009
Posted on Saturday, 05 August, 2017 - 06:46 am:   Edit PostDelete PostView Post/Check IP

Attention!!:

A huge debt of thanks is owed to Christopher Williams, who has succeeded in identifying a commonly available replacement for the OEM fan clutch on the 30K series SY cars. It is a bolt-on fit for both the mounting pedestal and the OEM plastic fan with metal hub: Range Rover Classic Part Number ERC2849

See his original post here:

http://au.rrforums.net/cgi-bin/forum/show.pl?tpc=17001&post=47148#POST47148

This is a major addition to the list of known readily-available alternate replacement parts.

Brian
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Omar M. Shams
Grand Master
Username: omar

Post Number: 1277
Registered: 4-2009
Posted on Tuesday, 08 August, 2017 - 05:03 am:   Edit PostDelete PostView Post/Check IP

Dear All,
I went to our Landrover shop and asked for a part number ERC2849. The guy was slow so i went to the shop next door (also a Land Rover specialist) and asked for the same part. This guy had his parts cheaper at only $80. so I thought yay!!! Then the part arrived in a brown box with no markings and looked nothing like the Shadow II viscous unit. The box certainly had ERC2849 printed on it. So i went back to the slow shop and by this time the old guy had brought his ERC2849 and put it on the counter (in a Britparts box). This one was exactly like the Shadow II unit.

The moral of the story is - look out it is possible that there may be two variations on the same part number (one may be a superceded part).

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