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Removing blade adaptor hub. #4595811
12/06/17 09:55 AM
12/06/17 09:55 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
I wanted to put a new belt on my old 21" exmark mower and to do this you have to remove the blade, slide the hub off and then remove the crankshaft protector. Takes all of three minutes to do. I don't know if the key sheared or if it's just rusted on, but I used a 2 jaw puller and all that did was bend the the adaptor hub. Opinions? I was just trying to put a new belt on it so I could sell it. This mower is old and dirty, but still works good.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4595818
12/06/17 10:03 AM
12/06/17 10:03 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
Any ideas on how to remove it? I don't know if that's something you want to apply heat to.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4595832
12/06/17 10:18 AM
12/06/17 10:18 AM
Joined: Jun 2011
Posts: 1,039
Texas
wag123 Offline
wag123  Offline
Joined: Jun 2011
Posts: 1,039
Texas
If you have access to an air compressor, an air chisel will get it off. You don't cut the blade adapter, you use a blunt chisel attachment using some force from the side and down/away from the engine, and just "vibrate" it off. Fast and easy.

Last edited by wag123; 12/06/17 10:21 AM.
Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4595841
12/06/17 10:30 AM
12/06/17 10:30 AM
Joined: Apr 2010
Posts: 4,398
Storrs, Connecticut
jeepman3071 Offline
jeepman3071  Offline
Joined: Apr 2010
Posts: 4,398
Storrs, Connecticut
Sounds like you need some heat. I'd heat up the outside of it (part that goes around the crankshaft) and also spray it with some penetrating oil like Kroil, PB Blaster, or a 50/50 mix of acetone and ATF. Then try the puller.


2000 Jeep Cherokee 4.0L (180k) - Pennzoil 10w30, Napa Gold 1516, Magnefine trans filter
2009 BMW 328i (33k) - Castrol Edge Euro 0w40, MANN HU816X
Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4595918
12/06/17 11:29 AM
12/06/17 11:29 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
I think I'm going to cut off the flat flange so I can get the crankshaft protector off and get more access.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4596016
12/06/17 12:36 PM
12/06/17 12:36 PM
Joined: Aug 2003
Posts: 10,778
Buffalo, NY
JTK Offline
JTK  Offline
Joined: Aug 2003
Posts: 10,778
Buffalo, NY
Yep, I'd try some good penetrating oil, heat or I like the air chisel idea too.

Worst case you can slit it with a cutoff wheel and pop it off.


2017 Ram 1500 4x4, 3.6L. 2016 Nissan Quest SV (Babe magnet IV)
Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4596050
12/06/17 01:02 PM
12/06/17 01:02 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
I bang on them with a hammer; of course that's not good for the crankshaft or the bearings.

Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4596222
12/06/17 03:59 PM
12/06/17 03:59 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
I have an air chisel, the problem is that crankshaft protector only allowed me to chisel the very end where the blade attaches. So if I cut that flimsy flat part off I can get more access to hit it with the chisel. Or maybe then I can hook the puller to the shaft instead which is more solid.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4596233
12/06/17 04:16 PM
12/06/17 04:16 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: JTK

Worst case you can slit it with a cutoff wheel and pop it off.


Yep.

As I get older, I hate fighting with stuff.

Cut a slit, pop old junk one off, replace with new adapter hub.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4596328
12/06/17 06:26 PM
12/06/17 06:26 PM
Joined: Jan 2011
Posts: 2,943
PV Az
AZjeff Offline
AZjeff  Offline
Joined: Jan 2011
Posts: 2,943
PV Az
time + belt + new adapter = more than mower is worth??


86 Samurai 1.3 leftovers
14 RAV4 2.5 5W-20 PP
16 Silverado 1500 4.3, DI, AFM 5W-30 PP

The most important thing to do in your life is to not interfere with someone else's life. - Frank Zappa

Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4596352
12/06/17 07:02 PM
12/06/17 07:02 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
Maybe. It was $1100.00 When new. I'm hoping to get $150 for it with a new belt. $75 as is.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4596403
12/06/17 08:00 PM
12/06/17 08:00 PM
Joined: Jun 2003
Posts: 33,074
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,074
ME
Maybe you could get one of those link-belts that you assemble in place?

Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4596525
12/06/17 09:31 PM
12/06/17 09:31 PM
Joined: Jun 2011
Posts: 1,039
Texas
wag123 Offline
wag123  Offline
Joined: Jun 2011
Posts: 1,039
Texas
Originally Posted By: motor_oil_madman
I have an air chisel, the problem is that crankshaft protector only allowed me to chisel the very end where the blade attaches. So if I cut that flimsy flat part off I can get more access to hit it with the chisel. Or maybe then I can hook the puller to the shaft instead which is more solid.

I have done a thousand of these! Just hit the side of it with the air chisel. No heat. Don't cut the flange off, it will make the removal more difficult. I promise you that it will come off.

Last edited by wag123; 12/06/17 09:32 PM.
Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4596856
12/07/17 09:11 AM
12/07/17 09:11 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
The only part I can access is the flange and I'd rather not put the air hammer on that part.i need to take the crankshaft protector off to hit it closer to the sump. I'm afraid I'll bend it if I just hammer at the other side.

Last edited by motor_oil_madman; 12/07/17 09:12 AM.

2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Removing blade adaptor hub. [Re: motor_oil_madman] #4596944
12/07/17 10:18 AM
12/07/17 10:18 AM
Joined: Jun 2011
Posts: 1,039
Texas
wag123 Offline
wag123  Offline
Joined: Jun 2011
Posts: 1,039
Texas
Originally Posted By: motor_oil_madman
The only part I can access is the flange and I'd rather not put the air hammer on that part.i need to take the crankshaft protector off to hit it closer to the sump. I'm afraid I'll bend it if I just hammer at the other side.

I know it is difficult to get to it with a crankshaft protector, but as long as you use a blunt fork-type bit in the air hammer you wont damage the blade mounting flange. You can also use a ball joint separator in the air hammer. Either way, the vibration of the air hammer will get it off of the shaft. I have done this a thousand times, trust me, it will work. Give it a try.

Last edited by wag123; 12/07/17 10:21 AM.
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