The Ford Barn

LizardsA · 03-08-2016, 10:47 AM

Good day folks,

I have a problem on my 'A' where the aluminium fan won't come off the water pump shaft. I need it off to check why there is play on the shaft.

Any ideas how I can get it off without damaging the fan?

I have tried gently levering it, I have tried tapping with a small hammer and punch, but it just won't budge.

Regards
Mike
Johannesburg, South Africa

THEOZON · 03-08-2016, 10:51 AM

Heat Fan.

Jim Brierley · 03-08-2016, 11:14 AM

Heat it as theozon says and/or put a nut on the threads, hold the assembly by the fan and strike the nut hard with a large hammer. the nut should be flush with the end of the shaft and not tight against the fan. I usually use a brass drift to strike it as it is easier to get a straight shot at it.

H. L. Chauvin · 03-08-2016, 11:49 AM

Hi Mike,

If during assembly, your hard steel half-moon key was not able to rotate back and forth, (fore & aft), in the steel shaft's half-moon's slot, your key may be tilted forward where the rear sharp edge is slightly lifted and digging into the aluminum fan slotted keyway.

If so, force is required ....... several lighter taps, (like that of taps of an impact wrench), is far better than one big giant squash like that of a 700 pound gorilla hitting it with a 100 pound maul. (Figuratively speaking? LOL)

The looseness & play in the shaft can be caused by the sharp edges of the hard steel fan nut wearing off the softer powder coating finish on the front of the fan. (Happened to mine).

If so, with a Dremel tool, always remove this soft powder coating down under the nut to shiny aluminum, provide a flat, "thin" steel washer, and re-tighten fan nut until no shaking is noticed.

After removal, (if the key was tight), to avoid a repeated difficult disassembly, "lightly" file sides of half-moon key so it can easily rotate in the shaft.

Hope this also helps others who have "loose" powder coated aluminum fans

Dodge · 03-08-2016, 11:55 AM

The parts suppliers have a knock off tool just for the purpose of taking the fan blade off.
I got mine from snyders

1Tudoor · 03-08-2016, 01:18 PM

Sponsored Links (Register now to hide all advertisements)

In this whole scenario keep in mind steel & aluminum don't get along & will corrode/bond together easily . (Steel a ferrous mat'l & alum non ferrous)
Since we have a keyed shaft & hub , wouldn't a light coat of anti seize lubricant prevent further problems upon reassembly ? If you've ever done any house wiring using aluminum wire , there is a anti oxidation coating just for this problem .
I believe brake pad lube is also applicable .

Tom Endy · 03-08-2016, 01:26 PM

You can make a knock off tool. Go to the local hardware store and purchase a bolt about two inches long that has the same threads as the pump shaft. Also buy two nuts that will screw onto the bolt.

Screw one nut onto the bolt the other onto the pump shaft. Position the nut on the shaft so half of it is on the shaft. Screw the bolt into the other half until it is tight against the shaft. Run the nut on the bolt down against the other nut and tighten it.

Hold the assembly by the fan and snack the end of the bolt a number of times with a hammer until the fan comes loose from the pump shaft.

Tom Endy

C26Pinelake · 03-08-2016, 02:09 PM

Quote:

Originally Posted by Tom Endy

You can make a knock off tool. Go to the local hardware store and purchase a bolt about two inches long that has the same threads as the pump shaft. Also buy two nuts that will screw onto the bolt.

Screw one nut onto the bolt the other onto the pump shaft. Position the nut on the shaft so half of it is on the shaft. Screw the bolt into the other half until it is tight against the shaft. Run the nut on the bolt down against the other nut and tighten it.

Hold the assembly by the fan and snack the end of the bolt a number of times with a hammer until the fan comes loose from the pump shaft.

Tom Endy

Devilish clever that Tom man! Wayne

BILL WILLIAMSON · 03-08-2016, 02:14 PM

"Maybe" someone put Loctite on the taper??? I put it on Minevas' & almost NEVER got it off!
Bill W.

Synchro909 · 03-08-2016, 03:40 PM

Quote:

Originally Posted by BILL WILLIAMSON

"Maybe" someone put Loctite on the taper??? I put it on Minevas' & almost NEVER got it off!
Bill W.

Heat as suggested in post #2 would take care of that too. Loctite lets go at about 180 degrees. By then, the Al fan should have expended enough to let it come off.

Gyrodoc · 03-08-2016, 04:25 PM

Rather than ruining the Castellated nut. I've used one of the King Pin nuts. Same thread and it's a cap nut.
Richard

msmaron · 03-08-2016, 05:32 PM

Quote:

Originally Posted by THEOZON

Heat Fan.

NO NO NO!!!!

Use a knock off tool OR run 2 nuts on the water pump shaft and use a NO BOUNCE hammer to get it off.. do it the right way.

jm29henry · 03-08-2016, 05:56 PM

I agree just spend 2 dollars on a knock off tool

Keith True · 03-08-2016, 06:18 PM

Use an old head stud.Screw an old head nut on halfway,then screw the stud into it.That way the pounding is going from the stud to the shaft,with no pressure on the threads.The nut is just holding things in line.Hold the fan hub in your fingers with the water pump hanging down,then whack the stud with a 3 pound hammer.Assemble after clean and dry.Tapers use nothing on them.You will be shocked at what never-seize will do to aluminum when sandwiched against steel.

d. · 03-08-2016, 07:06 PM

Keith,
what will never-seize do with aluminum/ steel contact? What is the problem?

Tom Wesenberg · 03-08-2016, 08:00 PM

I've removed them the same way Tom and Keith have said. On the rear axle the taper does a hard job driving the wheel, but on the water pump I wouldn't think anti-seize would hurt and would help during removal, since the key will drive the fan. Recheck the nut tightness after the aluminum fan has been in use for several hours, just as you should recheck lug nuts on aluminum wheels.

LizardsA · 03-09-2016, 10:04 AM

Okay gents,
Report-back time. Thanks everyone for the great advice. I used the head stud and nut contraption, and it worked like a charm!

Now, one further question, I have the packing ready to put into the packing housing. My question is this: there are two rings in the packet, do I use both of them?
Mike

Big hammer · 03-09-2016, 10:42 AM

Tom Wesenberg says to use oil on packing, put one in tighten the nut,back off nut install the second packing.

Tom Wesenberg · 03-09-2016, 11:36 PM

I clean out any old packing and use grease smeared on new lead packing rings.
Don't use string or graphite string, which is meant for non spinning shafts, like a faucet handle.

Brentwood Bob · 03-10-2016, 02:19 PM

Also a thin ss flat washer should go under the castlllated nut at reassembly.

03-08-2016, 10:47 AM	#1
LizardsA Senior Member Join Date: Oct 2012 Location: Randburg, Johannesburg, South Africa Posts: 225	Fan won't come off the water pump shaft Good day folks, I have a problem on my 'A' where the aluminium fan won't come off the water pump shaft. I need it off to check why there is play on the shaft. Any ideas how I can get it off without damaging the fan? I have tried gently levering it, I have tried tapping with a small hammer and punch, but it just won't budge. Regards Mike Johannesburg, South Africa

03-08-2016, 11:14 AM	#3
Jim Brierley Senior Member Join Date: Jun 2010 Location: Temecula, CA Posts: 4,251	Re: Fan won't come off the water pump shaft Heat it as theozon says and/or put a nut on the threads, hold the assembly by the fan and strike the nut hard with a large hammer. the nut should be flush with the end of the shaft and not tight against the fan. I usually use a brass drift to strike it as it is easier to get a straight shot at it.

03-08-2016, 11:49 AM	#4
H. L. Chauvin Senior Member Join Date: May 2010 Posts: 4,179	Re: Fan won't come off the water pump shaft Hi Mike, If during assembly, your hard steel half-moon key was not able to rotate back and forth, (fore & aft), in the steel shaft's half-moon's slot, your key may be tilted forward where the rear sharp edge is slightly lifted and digging into the aluminum fan slotted keyway. If so, force is required ....... several lighter taps, (like that of taps of an impact wrench), is far better than one big giant squash like that of a 700 pound gorilla hitting it with a 100 pound maul. (Figuratively speaking? LOL) The looseness & play in the shaft can be caused by the sharp edges of the hard steel fan nut wearing off the softer powder coating finish on the front of the fan. (Happened to mine). If so, with a Dremel tool, always remove this soft powder coating down under the nut to shiny aluminum, provide a flat, "thin" steel washer, and re-tighten fan nut until no shaking is noticed. After removal, (if the key was tight), to avoid a repeated difficult disassembly, "lightly" file sides of half-moon key so it can easily rotate in the shaft. Hope this also helps others who have "loose" powder coated aluminum fans

03-08-2016, 11:55 AM	#5
Dodge Senior Member Join Date: Nov 2011 Location: Sonoma, CA. Posts: 1,568	Re: Fan won't come off the water pump shaft The parts suppliers have a knock off tool just for the purpose of taking the fan blade off. I got mine from snyders

03-08-2016, 01:18 PM	#6
1Tudoor Senior Member Join Date: Jan 2016 Location: Upstate in NY's beautifull hills Posts: 173	Re: Fan won't come off the water pump shaft Sponsored Links (Register now to hide all advertisements) In this whole scenario keep in mind steel & aluminum don't get along & will corrode/bond together easily . (Steel a ferrous mat'l & alum non ferrous) Since we have a keyed shaft & hub , wouldn't a light coat of anti seize lubricant prevent further problems upon reassembly ? If you've ever done any house wiring using aluminum wire , there is a anti oxidation coating just for this problem . I believe brake pad lube is also applicable .

03-08-2016, 10:51 AM	#2
THEOZON Junior Member Join Date: Mar 2013 Posts: 26	Re: Fan won't come off the water pump shaft Heat Fan.

03-08-2016, 01:26 PM	#7
Tom Endy Senior Member Join Date: May 2010 Location: Southern California Posts: 3,168	Re: Fan won't come off the water pump shaft You can make a knock off tool. Go to the local hardware store and purchase a bolt about two inches long that has the same threads as the pump shaft. Also buy two nuts that will screw onto the bolt. Screw one nut onto the bolt the other onto the pump shaft. Position the nut on the shaft so half of it is on the shaft. Screw the bolt into the other half until it is tight against the shaft. Run the nut on the bolt down against the other nut and tighten it. Hold the assembly by the fan and snack the end of the bolt a number of times with a hammer until the fan comes loose from the pump shaft. Tom Endy

03-08-2016, 02:14 PM	#9
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: Fan won't come off the water pump shaft "Maybe" someone put Loctite on the taper??? I put it on Minevas' & almost NEVER got it off! Bill W. __________________ "THE ASSISTANT GURU OF STUFF"

03-08-2016, 04:25 PM	#11
Gyrodoc Senior Member Join Date: May 2011 Location: Ontario California Posts: 104	Re: Fan won't come off the water pump shaft Rather than ruining the Castellated nut. I've used one of the King Pin nuts. Same thread and it's a cap nut. Richard

03-08-2016, 05:56 PM	#13
jm29henry Senior Member Join Date: Sep 2010 Location: michigan Posts: 1,138	Re: Fan won't come off the water pump shaft I agree just spend 2 dollars on a knock off tool

03-08-2016, 06:18 PM	#14
Keith True Senior Member Join Date: May 2010 Location: Epping N.H. Posts: 3,423	Re: Fan won't come off the water pump shaft Use an old head stud.Screw an old head nut on halfway,then screw the stud into it.That way the pounding is going from the stud to the shaft,with no pressure on the threads.The nut is just holding things in line.Hold the fan hub in your fingers with the water pump hanging down,then whack the stud with a 3 pound hammer.Assemble after clean and dry.Tapers use nothing on them.You will be shocked at what never-seize will do to aluminum when sandwiched against steel.

03-08-2016, 07:06 PM	#15
d. Senior Member Join Date: May 2010 Location: Raleigh, NC Posts: 510	Re: Fan won't come off the water pump shaft Keith, what will never-seize do with aluminum/ steel contact? What is the problem?

03-08-2016, 08:00 PM	#16
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Fan won't come off the water pump shaft I've removed them the same way Tom and Keith have said. On the rear axle the taper does a hard job driving the wheel, but on the water pump I wouldn't think anti-seize would hurt and would help during removal, since the key will drive the fan. Recheck the nut tightness after the aluminum fan has been in use for several hours, just as you should recheck lug nuts on aluminum wheels.

03-09-2016, 10:04 AM	#17
LizardsA Senior Member Join Date: Oct 2012 Location: Randburg, Johannesburg, South Africa Posts: 225	Re: Fan won't come off the water pump shaft Okay gents, Report-back time. Thanks everyone for the great advice. I used the head stud and nut contraption, and it worked like a charm! Now, one further question, I have the packing ready to put into the packing housing. My question is this: there are two rings in the packet, do I use both of them? Mike

03-09-2016, 10:42 AM	#18
Big hammer Senior Member Join Date: Jun 2014 Location: Land of Lincoln Posts: 3,432	Re: Fan won't come off the water pump shaft Tom Wesenberg says to use oil on packing, put one in tighten the nut,back off nut install the second packing.

03-09-2016, 11:36 PM	#19
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Fan won't come off the water pump shaft I clean out any old packing and use grease smeared on new lead packing rings. Don't use string or graphite string, which is meant for non spinning shafts, like a faucet handle.

03-10-2016, 02:19 PM	#20
Brentwood Bob Senior Member Join Date: May 2010 Location: brentwood, ca Posts: 4,420	Re: Fan won't come off the water pump shaft Also a thin ss flat washer should go under the castlllated nut at reassembly.