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Just How Strong is the CP717 Hammer? #4482005
08/07/17 04:54 PM
08/07/17 04:54 PM
Joined: May 2005
Posts: 2,309
Toronto, Canada
George7941 Offline OP
George7941  Offline OP

Joined: May 2005
Posts: 2,309
Toronto, Canada

I am doing some suspension work on a Freightliner truck and was not able to free up the saddle shown in the picture from the 2 U bolts that pass through it. I was able to undo the nuts with a 6 ft cheater pipe on a 1 in breaker bar. Club hammer did not help freeing up the saddle and there is no room to swing a sledge hammer. Truck is a 2004, so the assembly has remained undisturbed for 13 years and road salt has done its work.

I keep reading that the CP717 is awesome, with tremendous power. I don't own one but might buy one. Would it be able to free up this assembly? I would like to avoid cutting the U bolts if possible. For reference, the U bolts are 3/4 in dia.


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
Re: Just How Strong is the CP717 Hammer? [Re: George7941] #4482011
08/07/17 05:01 PM
08/07/17 05:01 PM
Joined: Nov 2013
Posts: 2,014
Chicago, IL
EdwardC Offline
EdwardC  Offline

Joined: Nov 2013
Posts: 2,014
Chicago, IL
Have you tried heating it up a little? Just throwing this out there, but could you put the nuts back on at the end just to protect the threads, then use a floor jack to push the U-Bolts upwards? Sorry, never used an air hammer. Good luck though!

Re: Just How Strong is the CP717 Hammer? [Re: EdwardC] #4482014
08/07/17 05:04 PM
08/07/17 05:04 PM
Joined: May 2014
Posts: 1,550
Minnesota
philipp10 Offline
philipp10  Offline

Joined: May 2014
Posts: 1,550
Minnesota
Originally Posted By: EdwardC
Have you tried heating it up a little? Just throwing this out there, but could you put the nuts back on at the end just to protect the threads, then use a floor jack to push the U-Bolts upwards? Sorry, never used an air hammer. Good luck though!


"just a little"....how about just a lot...lol

Re: Just How Strong is the CP717 Hammer? [Re: George7941] #4482039
08/07/17 05:33 PM
08/07/17 05:33 PM
Joined: Nov 2006
Posts: 21,273
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,273
MA, Mittelfranken.de
I have the CP717, its more powerful than any air hammer I ever used, if you routinely do this sort of work its a must have.


ASE L1, Master. Deutsch Meisterbrief.
Re: Just How Strong is the CP717 Hammer? [Re: George7941] #4482173
08/07/17 08:02 PM
08/07/17 08:02 PM
Joined: Mar 2012
Posts: 1,457
San Antonio, TX
E150GT Offline
E150GT  Offline

Joined: Mar 2012
Posts: 1,457
San Antonio, TX
Get you the Astro "big nasty" Hear its a beast.


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 57k 10w30
2006 Buick Lucerne CXL 3.8 31k 5w30
Re: Just How Strong is the CP717 Hammer? [Re: E150GT] #4482208
08/07/17 08:38 PM
08/07/17 08:38 PM
Joined: Dec 2016
Posts: 8,038
Waco, TX
Linctex Online content
Linctex  Online Content

Joined: Dec 2016
Posts: 8,038
Waco, TX
Originally Posted By: E150GT
Get you the Astro "big nasty" Hear its a beast.


https://www.youtube.com/watch?v=WUy5y7V6Px8


"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: Just How Strong is the CP717 Hammer? [Re: George7941] #4482211
08/07/17 08:42 PM
08/07/17 08:42 PM
Joined: Dec 2016
Posts: 8,038
Waco, TX
Linctex Online content
Linctex  Online Content

Joined: Dec 2016
Posts: 8,038
Waco, TX


"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: Just How Strong is the CP717 Hammer? [Re: E150GT] #4482295
08/07/17 10:22 PM
08/07/17 10:22 PM
Joined: Nov 2006
Posts: 21,273
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,273
MA, Mittelfranken.de
Originally Posted By: E150GT
Get you the Astro "big nasty" Hear its a beast.


Why buy a Taiwan made knock off when the real deal that has proven itself for years in heavy duty use for only $50 more. The 717 I have is US made the new ones are Japan COO but just as high quality.

https://www.amazon.com/Astro-Pneumatic-Tool-4980-Riveter/dp/B01C2RTJZK

https://www.amazon.com/Chicago-Pneumatic...BFMNYQ41WY13Y5T



ASE L1, Master. Deutsch Meisterbrief.
Re: Just How Strong is the CP717 Hammer? [Re: Trav] #4482303
08/07/17 10:36 PM
08/07/17 10:36 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline

Joined: Jan 2007
Posts: 17,501
Clovis, CA
Holy smokes! I didn't know "Big Nasty" was that expensive. shocked2

Re: Just How Strong is the CP717 Hammer? [Re: Merkava_4] #4482314
08/07/17 10:53 PM
08/07/17 10:53 PM
Joined: Nov 2006
Posts: 21,273
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,273
MA, Mittelfranken.de
What the ef is Amazon doing, when I posted this it was $325 now a few people looked at it its over $400. Friggin swindlers.
Google Astro 4980 and go to the amazon page, the 717 is right above it for $325.


ASE L1, Master. Deutsch Meisterbrief.
Re: Just How Strong is the CP717 Hammer? [Re: George7941] #4482328
08/07/17 11:53 PM
08/07/17 11:53 PM
Joined: May 2012
Posts: 1,406
Georgia
AVB Offline
AVB  Offline

Joined: May 2012
Posts: 1,406
Georgia
When I click your link it shows $325 but if you look at the other sellers box their is another one listed as sold by amazon for $418.

Re: Just How Strong is the CP717 Hammer? [Re: George7941] #4486156
08/11/17 10:11 PM
08/11/17 10:11 PM
Joined: Jun 2011
Posts: 1,836
Crawfordville FL
SilverFusion2010 Offline
SilverFusion2010  Offline

Joined: Jun 2011
Posts: 1,836
Crawfordville FL
Pull the nuts off and go over a speed bump or two?

Soak it several times with PB Blaster and let it sit overnight. It's somewhat acidic so it dissolves the rust in addition to the penetrating oil action.

If that doesn't work, I'd try a bottle jack with a block of wood to press it out.


2010 Ford Fusion SE 3.0L V6, 181 miles M1 HM 10w-30
Re: Just How Strong is the CP717 Hammer? [Re: George7941] #4487032
08/13/17 03:33 AM
08/13/17 03:33 AM
Joined: Jun 2015
Posts: 580
New York
NoNameJoe Online content
NoNameJoe  Online Content

Joined: Jun 2015
Posts: 580
New York
Torch it. Using a $45.00 (not sure what CAD prices would be) MAP/PRO blowtorch like the TS8000 from Home Depot would heat the nut up red if you left it on for a minute or so. I do it all the time. Then it breaks loose easily and squeals the whole way. I've taken off fasteners far worse than those with the TS8000 and I live in NY which is salted too.

Fasteners like these:


Another plus of this is that it often preserves the fastener, it's non-destructive. The one in this picture came out re-usable, minus the threads that were missing past the nut (although I just replaced it because it was so cheap to do so).


2015 Civic LX Coupe
Re: Just How Strong is the CP717 Hammer? [Re: NoNameJoe] #4487116
08/13/17 07:48 AM
08/13/17 07:48 AM
Joined: Nov 2006
Posts: 21,273
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,273
MA, Mittelfranken.de
He already got the nuts loose. This is a class 8 truck, a plumbing torch isn't doing anything for that saddle. Big truck big tools and powerful air tools. A Mapp gas torch is no substitute for a proper oxy acetylene torch in any way. It is a better alternative to a propane torch for soldering copper pipe especially the larger diameter ones but it has no business under a car or truck.


ASE L1, Master. Deutsch Meisterbrief.
Re: Just How Strong is the CP717 Hammer? [Re: SilverFusion2010] #4488342
08/14/17 11:59 AM
08/14/17 11:59 AM
Joined: May 2005
Posts: 2,309
Toronto, Canada
George7941 Offline OP
George7941  Offline OP

Joined: May 2005
Posts: 2,309
Toronto, Canada
Originally Posted By: SilverFusion2010
Pull the nuts off and go over a speed bump or two?

Soak it several times with PB Blaster and let it sit overnight.


Did you notice it is an underslung suspension? If the nuts are taken off and the saddle came loose, the entire truck would come down on to the bump stop. Leaving the nuts loose but in place would probably have done the job.

I got the saddle loose by using a jack under the U-bolts and forcing up the U-bolts, as has been suggested. Mission accomplished.


2006 GMC Sierra 4.3l, NV3500,G80 , Mobil 1 5W30, Dexcool.
1987 BMW R80 - sold
2015 Honda CBR300R

Staying out of the right lane a lot.
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