Product Videos
Questions & Answers
Sort By:

Question By: Erik lund on Jul 2 2020 12:03 PM
3.5"
Answer By: Willys Jeep Parts Tech on Jul 2 2020 5:47 AM

Question By: JOEY Mabelitini on Apr 15 2020 2:12 PM
That would be an unoriginal master cylinder on it. Please email mike@kaiserwillys.com your vehicle info and we can help.
Answer By: Willys Jeep Parts Tech on Apr 15 2020 11:24 AM

Question By: Tommy on Apr 10 2020 2:18 PM
Yes, this one - #805223 - is the correct one for the FC-150. Thanks
Answer By: Willys Jeep Parts Tech on Apr 13 2020 4:02 AM

Question By: Bud on Aug 24 2019 3:31 PM
Sorry, We cant get just the caps by themselves. We do have new gaskets if you need it.
Answer By: Willys Jeep Parts Tech on Aug 26 2019 5:33 AM

Question By: jeff on May 30 2019 1:02 PM
Make sure you bleed at all 4 wheels to get any air out of the lines. See part number: A5510
Answer By: Willys Jeep Parts Tech on May 31 2019 7:48 AM

Question By: Tom Wiegmann on Jan 4 2019 1:34 AM
No, the 805223 is already assembled. That kit is only if your rebuilding your old one.
Answer By: Willys Jeep Parts Tech on Jan 4 2019 5:43 AM

Question By: leonard moreno on Aug 12 2018 9:25 PM
Yes, it is the correct master cylinder originally used.
Answer By: Willys Jeep Parts Tech on Aug 13 2018 5:53 AM

Question By: Sharon on Jul 23 2018 12:08 PM
Its probably your free pedal travel setting. Please call me toll free. Ask for Mike M. Im happy to help.
Answer By: Willys Jeep Parts Tech on Jul 23 2018 7:29 AM

Question By: Jay on Jul 16 2018 8:47 PM
Depends on current stock. Call us toll free and we can check when your ready to order. Both function the same.
Answer By: Willys Jeep Parts Tech on Jul 17 2018 6:02 AM

Question By: Jerry Miranda on Feb 27 2018 7:34 AM
This is for venting to prevent moisture build up. It is not truly necessary with proper maintenance.
Answer By: Willys Jeep Parts Tech on Feb 27 2018 12:19 PM

Question By: Greg Stein on Jan 22 2018 5:57 PM
This is the correct master cylinder for your CJ-5 as long as you have 9" brakes. Typically in '67, the CJ-5s had 10" brakes and had a dual reservoir master cylinder.
So, as long as your Jeep has 9" brakes and the master cylinder is mounted under the driver seat of the vehicle, this is the correct one for your application. Thanks
Answer By: Willys Jeep Parts Tech on Jan 22 2018 10:27 AM

Question By: Derryl Acosta on Dec 27 2017 10:24 PM
647801 is a pressure brake light switch. I would check your connections and probably replace.
Answer By: Willys Jeep Parts Tech on Dec 29 2017 5:51 AM

Question By: Kevin on Nov 24 2017 10:37 PM
After checking into some manuals, this master cylinder will work for the M170. Thanks
Answer By: Admin on Nov 27 2017 5:43 AM

Question By: Chris on Sep 12 2017 8:38 AM
Those are a hardware store item.
Answer By: Willys Jeep Parts Tech on Sep 12 2017 5:58 AM

Question By: Neil Netoskie on Mar 27 2017 5:13 PM
Here is a link to all the parts:
https://www.kaiserwillys.com/diagram/cj-2a-diagrams/brake-diagrams-willys-cj-2a/brake-master-cylinder-41-71-willys-jeep/brake-master-cylinder-41-71-willys-jeep
Answer By: Willys Jeep Parts Tech on Mar 27 2017 10:20 AM

Question By: Kyle Joseph Waletich on Sep 19 2016 5:37 PM
I would double check your free pedal travel and set it properly. You also need to see if your return spring is still there.
Answer By: Willys Jeep Parts Tech on Sep 19 2016 12:15 PM

Question By: lou on Mar 5 2015 12:00 AM
This is the stock master cylinder above. It is a 1 bore I believe.
Answer By: Willys Tech on Mar 5 2015 12:00 AM

Question By: Russ on Jan 29 2015 12:00 AM
http://www.kaiserwillys.com/willys_jeep_serial_numbers
Answer By: Willys Tech on Jan 1 1970 12:00 AM

Question By: Aubrey king on Dec 28 2014 12:00 AM
It is 3-3/8 like original.
Answer By: Willys Tech on Dec 29 2014 12:00 AM

Question By: Doug on Nov 18 2014 12:00 AM
You will want to get this part number the original one 805223.
Answer By: Willys Tech on Nov 18 2014 12:00 AM

Question By: mike on Nov 1 2014 12:00 AM
We usually use DOT 3.
Answer By: Willys Tech on Nov 3 2014 12:00 AM

Question By: Anonymous on Sep 23 2014 12:00 AM
Yes it comes with the boot as shown. It is a complete master cylinder. You may also want to get the fitting, outlet bolt, crush washers, and brake light switch with it as well. We sell all of them.
Answer By: Willys Tech on Sep 23 2014 12:00 AM

Question By: Anonymous on Apr 28 2014 12:00 AM
Yes, this fits all the vehicles listed above.
Answer By: Willys Tech on Apr 29 2014 12:00 AM

Question By: Anonymous on Nov 11 2013 12:00 AM
Those are only available good used.
Answer By: Willys Tech on Nov 12 2013 12:00 AM

Question By: Anonymous on May 27 2013 12:00 AM
Yes as long as you have a CJ-2 with 2 clearance holes for mounting.
Answer By: Willys Tech on May 27 2013 12:00 AM

Question By: Joe on Jan 1 1970 12:00 AM
Yes this is the proper one for you. It fits all the vehicles listed above. Thanks!
Answer By: Willys Tech on Feb 27 2013 12:00 AM

Question By: John Polacek on Dec 12 2012 12:00 AM
Yes, it is probably a master cylinder issue. You should also check inside by your wheel cylinders on the drum side to make sure your rubber is not dry rot and leaking internally.
Answer By: Willys Tech on Dec 13 2012 12:00 AM

Question By: Anonymous on Nov 25 2012 12:00 AM
If your old master cylinder is still on there then you probably have alot of corrosion. This will do the trick for you.
Answer By: Willys Tech on Nov 26 2012 12:00 AM

Question By: Anonymous on Nov 5 2012 12:00 AM
Yes that is correct it is proper.
Answer By: Willys Tech on Nov 5 2012 12:00 AM

Question By: wyatt on Oct 30 2012 12:00 AM
The part number is A557
Answer By: Willys Tech on Nov 4 2012 12:00 AM

Question By: Anonymous on Sep 20 2012 12:00 AM
Yes this is correct for the Aero. It is a direct replacement.
Answer By: Willys Tech on Sep 21 2012 12:00 AM

Question By: Anonymous on Sep 19 2012 12:00 AM
The brake light switch is part number: 647801
Answer By: Willys Tech on Sep 19 2012 12:00 AM

Question By: Kevin on Aug 23 2012 12:00 AM
The booster is unoriginal and aftermarket. Depending on the type of booster im sure this would work ok.
Answer By: Willys Tech on Aug 24 2012 12:00 AM

Question By: dan on Aug 1 2012 12:00 AM
This is how it was originally. You just run a bolt straight thru it.
Answer By: Willys Tech on Aug 2 2012 12:00 AM

Question By: Bob Miller on Jun 26 2012 12:00 AM
On a CJ-2A they are on the firewall next to the oil bath air cleaner on the passenger side.
Answer By: Willys Tech on Jun 27 2012 12:00 AM

Question By: scott on Jun 20 2012 12:00 AM
The part number you want for a 1941-45 MB/GPW is: A556
Answer By: Willys Tech on Jun 20 2012 12:00 AM

Question By: Jeff on May 22 2012 12:00 AM
Yes this is complete with cap.
Answer By: Willys Tech on May 23 2012 12:00 AM

Question By: Tom on May 11 2012 12:00 AM
We can probably get just that good used.
Answer By: Willys Tech on May 14 2012 12:00 AM

Question By: Thomas Rock on Apr 7 2012 12:00 AM
No, this is the correct one for your vehicle.
Answer By: Willys Tech on Apr 9 2012 12:00 AM

Question By: Pete on Mar 7 2012 12:00 AM
Yes as long as you are single reservoir.
Answer By: Willys Tech on Mar 8 2012 12:00 AM

Question By: Anonymous on Feb 20 2012 12:00 AM
As long as you have a frame mounted single reservoir master cylinder this should be correct.
Answer By: Willys Tech on Feb 20 2012 12:00 AM

Question By: Darrel on Feb 14 2012 12:00 AM
As long as you have 9 brakes with a single reservoir master cylinder mounted on the frame this is the correct one for you.
Answer By: Willys Tech on Feb 14 2012 12:00 AM

Question By: Vaughn Becker on Feb 7 2012 12:00 AM
Yes that is correct.
Answer By: Willys Tech on Feb 8 2012 12:00 AM

Question By: Anonymous on Oct 15 2011 12:00 AM
Yes as long as you are frame mounted single reservoir with 9 brakes.
Answer By: Willys Tech on Oct 17 2011 12:00 AM

Question By: Jimmy on Aug 17 2011 12:00 AM
It is recommended to use a disc master cylinder and proportioning valve. We sell it in kits. Try part numbers: 376896 or 376897 depending on your Willys or Jeep.
Answer By: Willys Tech on Aug 18 2011 12:00 AM

Question By: kevin on Aug 15 2011 12:00 AM
You want 1 to 1-1/2 free pedal travel.
Answer By: Willys Tech on Aug 15 2011 12:00 AM

Question By: Anonymous on Jul 4 2011 12:00 AM
This is the complete master cylinder. The outlet bolt and fittings are separate.
Answer By: Willys Tech on Jul 5 2011 12:00 AM

Question By: butch clark on May 25 2011 12:00 AM
It is approx 3 1/2 center to center just like original
Answer By: Willys Tech on May 25 2011 12:00 AM

Question By: John on Feb 8 2011 12:00 AM
The master cylinder repair kits are a good option but the bore on your old master cylinder need to be smooth. I always try to steer people towards this new master cylinder. Its just alot easier and new.
Answer By: Willys Tech on Feb 9 2011 12:00 AM

Question By: Billy on Jan 16 2011 12:00 AM
DOT 3
Answer By: Willys Tech on Jan 18 2011 12:00 AM

Question By: Michael on Dec 8 2010 12:00 AM
Sure, you can also use part number: 805223-CJDUAL. However this master cylinder is great and wont give you any problems.
Answer By: Willys Tech on Dec 9 2010 12:00 AM

Question By: Anonymous on Nov 2 2010 12:00 AM
3 3/8 center to center
Answer By: Willys Tech on Nov 3 2010 12:00 AM

Question By: Scot on May 4 2016 5:09 PM
I would want to confirm the brakes you have on there currently. Please call me toll free. I am happy to help. Thanks!
Answer By: Willys Tech on May 4 2016 12:09 PM