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Questions: I have a 1948 CJ-2A, with serial #150901. And I believe this is the correct part as the front mounting hole is threaded. But I'm curious, did they ever come with a plastic cap? I'm ordering a new part, but I was just wondering. Thank you.
Question By: Shelby s. Wegener on Aug 1 2020 8:01 PM
If you have a plastic cap its most likely a replacement master cylinder.
Answer By: Willys Jeep Parts Tech on Aug 3 2020 5:42 AM
Questions: I have a 1947 CJ2A L134 engine serial number 99434
Is this the master cylinder i need?
Question By: Eric on Jun 6 2020 1:04 PM
This is the early style with the front mounting hole threaded. Thanks
Answer By: Willys Jeep Parts Tech on Jun 7 2020 5:11 PM
Questions: Hi there
I’m looking at the master cylinder 41-48 mb
My question is will it fit a 41 willys four door sedan
Thank you
Question By: Danny on Jan 14 2020 9:04 PM
Sorry, I believe the early pre war sedans used a different master cylinder.
Answer By: Willys Jeep Parts Tech on Jan 14 2020 1:14 PM
Questions: what is the warranty on this part?
Question By: aaron on Nov 20 2017 5:38 PM
We have up to a 5 year warranty on most parts with the exception of abuse or misuse of item.
Answer By: Willys Jeep Parts Tech on Nov 20 2017 10:38 AM
Questions: I have a 1948 CJ2A with serial number 204787 and only in need of a Master Cylinder cap - do you sell them by itself and what is the cost?
Question By: Jan Oberholzer on Aug 10 2017 3:35 AM
The cap is only available with the master cylinder. You may be able to match it up locally, otherwise. Thanks
Answer By: Willys Jeep Parts Tech on Aug 10 2017 5:33 AM
Questions: I have a 48 CJ2A, Ser. Number 177318. The master break cylinder does not appear to pressurize any of the four brake lines... or at least no air or fluid is forced out at the wheels when 'bleeding". could this be a failure of the cylinder piston or one of the rubber cups? No idea how to proceed other than a complete replacement of the master cylinder.
Question By: Daniel Baldwin on Oct 26 2016 6:35 PM
Its usually best to replace the master cylinder all together. We do sell a repair kit too part number: 805654 if the bore on your old master cylinder is still good.
Answer By: Willys Jeep Parts Tech on Oct 26 2016 11:36 AM
Questions: Do the brass washers come with the new Master cylinder ? Is there core charge? Thanks
Question By: Russ on Mar 30 2015 12:00 AM
These are brand new, there is no core needed. The crush washers are separate. Part numbers: 637604 & 637606.
Answer By: Willys Tech on Mar 31 2015 12:00 AM
Questions: I Have A 1948 CJ-2A Serial # 155314 Is This The Right Master Cylinder For It ? Also What Size Thread Are The Bolts. Thanks!
Question By: David Clark on Mar 10 2014 12:00 AM
As long as the front mounting hole to the frame is threaded on the master cylinder it will be.
Answer By: Willys Tech on Mar 10 2014 12:00 AM
Questions: Re-doing a basket case 1947 CJ2A. Not certain of the serial #. Where are all the places the # would have been stamped?
Question By: Anonymous on Feb 27 2014 12:00 AM
Typically is it on the firewall next to the oil bath air cleaner on the passenger side.
Answer By: Willys Tech on Feb 27 2014 12:00 AM
Questions: I am searching for the push rod that goes in the back of the master cylinder???????
Question By: Anonymous on Oct 3 2013 12:00 AM
We have those new. Part number A183. Thanks
Answer By: Willys Tech on Oct 4 2013 12:00 AM
Questions: Does the Master Cylinder Part A556 come with the plunger or just the boot?
Question By: Doug on Jul 22 2013 12:00 AM
Just the boot. The plungers are only availble good used.
Answer By: Willys Tech on Jul 22 2013 12:00 AM
Questions: I have a '46 CJ2A, #44645. I have a tough time reaching the master cylinder cover to check the brake fluid. Is there a special tool available to remove the cap?
Question By: Earnest Ray on Jul 1 2013 12:00 AM
You should have an access cover in your floor board or you can try from the underside. There really is no special tool.
Answer By: Willys Tech on Jul 2 2013 12:00 AM
Questions: My 46 willys has the serial number 45152 is this the right master brake cylinder
Question By: Anonymous on Nov 19 2012 12:00 AM
Yes that is correct. As long as it has a threaded front mounting hole.
Answer By: Willys Tech on Nov 20 2012 12:00 AM
Questions: I have a master cylinder leak around the boot. Just leaks sitting in garage. What's my solution,replacement rubber boot (is there one) or replace entire master cyl?
Question By: Kurt on Aug 12 2012 12:00 AM
Yes that is correct. I would also check your wheel cylinders too.
Answer By: Willys Tech on Aug 13 2012 12:00 AM
Questions: Is model A556 single action?
Question By: Anonymous on Feb 23 2012 12:00 AM
Yes this is a single reservoir like original
Answer By: Willys Tech on Feb 23 2012 12:00 AM
Questions: Do the brake shoes for '48 willys include the pads?
Question By: Anonymous on Nov 7 2011 12:00 AM
Yes the are complete shoe sets.
Answer By: Willys Tech on Nov 8 2011 12:00 AM
Questions: Need brake master cyl for 1947 jeep with threaded hole, does your item #A556 come with a threaded hole?
Question By: Anonymous on Oct 26 2011 12:00 AM
Yes that is correct is the early style that is threaded.
Answer By: Willys Tech on Oct 26 2011 12:00 AM
Questions: I recently purchased the above Master brake cylinder but it did not have the hardware to bolt it on, is this supplied or can I purchase seperatly. I hac a 1947 CJ2A and is my first project.
Question By: Scott on Sep 12 2011 12:00 AM
The bolts to bolt it up are just local hardware items. I do have the outlet bolt and crush washers if you need those. Please call us toll free. We are more than happy to help out.
Answer By: Willys Tech on Sep 12 2011 12:00 AM
Questions: What is the measurement of the center between the two mounting holes?
Question By: Butch Clark on May 25 2011 12:00 AM
It is approx 3 1/8 center to center just like original
Answer By: Willys Tech on May 25 2011 12:00 AM
Questions: Ordered part # 805223 Master Brake cyclinder, was the push rod assembly included with that item. If so, mine did not have that part included. Please advise as what can be done.
Question By: Jim Bass on Feb 22 2011 12:00 AM
The plunger is not included. We can get these good used. Please call us toll free.
Answer By: Willys Tech on Feb 22 2011 12:00 AM
Questions: need master cylinder with out threded hole for 1947 willys jeep
Question By: Bill on Jan 26 2011 12:00 AM
You need part number: 805223
Answer By: Willys Tech on Jan 27 2011 12:00 AM
Questions: Need brake master cyl for 1947 jeep with threaded hole, does your item #A556 come with a threaded hole?
Question By: Anonymous on Oct 26 2011 12:00 AM
Yes that is correct is the early style that is threaded.
Answer By: Willys Tech on Oct 26 2011 12:00 AM
Questions: I recently purchased the above Master brake cylinder but it did not have the hardware to bolt it on, is this supplied or can I purchase seperatly. I hac a 1947 CJ2A and is my first project.
Question By: Scott on Jan 1 1970 12:00 AM
The bolts to bolt it up are just local hardware items. I do have the outlet bolt and crush washers if you need those. Please call us toll free. We are more than happy to help out.
Answer By: Willys Tech on Sep 12 2011 12:00 AM
Questions: what is the measurement of the center between the two mounting holes?
Question By: butch clark on May 25 2011 12:00 AM
It is approx 3 1/8 center to center just like original
Answer By: Willys Tech on May 25 2011 12:00 AM
Questions: Does master cylinder #A556 have a plastic or metal filler cap? Thanks.
Question By: Dale Blackburn on Apr 30 2016 12:05 PM
Sorry nobody can get these with a metal cap.
Answer By: Willys Tech on May 2 2016 5:55 AM
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