This is common that the fan comes off with the 1500 fan clutch. The crush
rings that Vicky and Moss sell are no good. I have seen them pull off with a
tug. You have to find a good factory spec. crush ring and then make sure that
it is well seated. IB attempted to have the water pump shaft drilled and
tapped for a retainer bolt, the shaft is so hard that the machine shop
couldn't dent it with their tools. I have not had a fanB eject yet but it is a
matter of time with a new 1300 race engine that I amB about to install.
Electric fan sounds like good idea to me if you are going to run hard. -----
Original Message -----
From: "Peter Caldwell" <peter@nosimport.com>
To: "David Booker" <tncarnut1@yahoo.com>, "spridget"
<spridgets@autox.team.net>
Sent: Tuesday, July 27, 2010 11:48:13 AM
Subject: Re: [Spridgets] 1500 Fan Clutch question
If all you installed was the clutch and blades, you missed the "one
time use only" crush ring. B Moss 071-239 It is a corrugated collar
that deforms when the clutch is pressed on. Meant to lock it. But....
if that was installed NEW, then there must be another issue.
B B B The set up from an earlier year Spitfire with clutch fan is often used.
B B B B B Peter C
====
At 07:02 AM 7/27/2010, David Booker wrote:
>My friend put a new fan clutch and water pump on his 1500 Midget this
weekend.
>The clutch went onto the pump shaft via his press, feeling what he thought
was
>properly "snug" during the process. Everything went back in fine, using all
>the
>proper parts (there's apparently a crush washer in there somewhere, but
>I've
>never worked on one of these so don't know). B A few miles later when
>everything
>was nice and warm, the fan went into the radiator...
>
>He wants to
>know if this is a common occurance. B The pump and clutch both came
>from Mo$$.
>Anybody have suggestions for a fix? JB Weld on the shaft when
>reassembling?
>Drill and tap threads into the waterpump shaft, then lock on with
>a bolt and
>washer? Other ideas?
>
>He didn't like my suggestion of throwing the whole thing
>away and installing a
>thermostatically-controlled electric fan as he fears
>the alternator is not up to
>the task...
>
>Thanks,
> B - David Booker
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