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Questions & Answers
do u need too bench bleed a master cyl. on a 197 cj-2a
Willys Jeep Parts Tech:
Yes, you should always bench bleed before installation.
Yes, you should always bench bleed before installation.
Any chance the metal cap from my original master cylinder would fit this new one (to use instead of the plastic one?)
Willys Jeep Parts Tech:
Depends on which master cylinder you had on there. But most likely the cap would not fit.
Depends on which master cylinder you had on there. But most likely the cap would not fit.
Have a 1946 CJ2A, SN: 28,256. Would my brake master cylinder have the threaded mounting hole? I haven’t tore it down yet
Willys Jeep Parts Tech:
It is best to check the master cylinder itself to be sure.
It is best to check the master cylinder itself to be sure.
does it come with all the internal parts?
Willys Jeep Parts Tech:
Yes, that is correct.
Yes, that is correct.
Item # A556 does this come with the brake light switch or can I order that as a separate item.
Willys Jeep Parts Tech:
That is separate. We have them available.
That is separate. We have them available.
What type of brake fluid is recommended for this master cylinder.
Willys Jeep Parts Tech:
DOT3
DOT3
Can I just get a new cap?
Willys Jeep Parts Tech:
Sorry, the cap is not available by itself. We do have just the cap gasket though.
Sorry, the cap is not available by itself. We do have just the cap gasket though.
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.
Willys Jeep Parts Tech:
If you have a plastic cap its most likely a replacement master cylinder.
If you have a plastic cap its most likely a replacement master cylinder.
I have a 1947 CJ2A L134 engine serial number 99434 Is this the master cylinder i need?
Willys Jeep Parts Tech:
This is the early style with the front mounting hole threaded. Thanks
This is the early style with the front mounting hole threaded. Thanks
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.
Willys Tech:
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.
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.
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
Willys Jeep Parts Tech:
Sorry, I believe the early pre war sedans used a different master cylinder.
Sorry, I believe the early pre war sedans used a different master cylinder.
what is the warranty on this part?
Willys Jeep Parts Tech:
We have up to a 5 year warranty on most parts with the exception of abuse or misuse of item.
We have up to a 5 year warranty on most parts with the exception of abuse or misuse of item.
Will these fit a 1970 CJ5? I will be running 750 16 tires and thought this would make patching tubes much easier.
Willys Jeep Parts Tech:
The better rims for the CJ-5 with 16" tires is going to be part #640800. These are for the early military vehicles. Thanks
The better rims for the CJ-5 with 16" tires is going to be part #640800. These are for the early military vehicles. Thanks
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?
Willys Jeep Parts Tech:
The cap is only available with the master cylinder. You may be able to match it up locally, otherwise. Thanks
The cap is only available with the master cylinder. You may be able to match it up locally, otherwise. Thanks
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.
Willys Jeep Parts Tech:
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.
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.
Does master cylinder #A556 have a plastic or metal filler cap? Thanks.
Willys Tech:
Sorry nobody can get these with a metal cap.
Sorry nobody can get these with a metal cap.
Do the brass washers come with the new Master cylinder ? Is there core charge? Thanks
Willys Tech:
These are brand new, there is no core needed. The crush washers are separate. Part numbers: 637604 & 637606.
These are brand new, there is no core needed. The crush washers are separate. Part numbers: 637604 & 637606.
I Have A 1948 CJ-2A Serial # 155314 Is This The Right Master Cylinder For It ? Also What Size Thread Are The Bolts. Thanks!
Willys Tech:
As long as the front mounting hole to the frame is threaded on the master cylinder it will be.
As long as the front mounting hole to the frame is threaded on the master cylinder it will be.
Re-doing a basket case 1947 CJ2A. Not certain of the serial #. Where are all the places the # would have been stamped?
Willys Tech:
Typically is it on the firewall next to the oil bath air cleaner on the passenger side.
Typically is it on the firewall next to the oil bath air cleaner on the passenger side.
I am searching for the push rod that goes in the back of the master cylinder???????
Willys Tech:
We have those new. Part number A183. Thanks
We have those new. Part number A183. Thanks
Does the Master Cylinder Part A556 come with the plunger or just the boot?
Willys Tech:
Just the boot. The plungers are only availble good used.
Just the boot. The plungers are only availble good used.
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?
Willys Tech:
You should have an access cover in your floor board or you can try from the underside. There really is no special tool.
You should have an access cover in your floor board or you can try from the underside. There really is no special tool.
My 46 willys has the serial number 45152 is this the right master brake cylinder
Willys Tech:
Yes that is correct. As long as it has a threaded front mounting hole.
Yes that is correct. As long as it has a threaded front mounting hole.
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?
Willys Tech:
Yes that is correct. I would also check your wheel cylinders too.
Yes that is correct. I would also check your wheel cylinders too.
Is model A556 single action?
Willys Tech:
Yes this is a single reservoir like original
Yes this is a single reservoir like original
Do the brake shoes for '48 willys include the pads?
Willys Tech:
Yes the are complete shoe sets.
Yes the are complete shoe sets.
Need brake master cyl for 1947 jeep with threaded hole, does your item #A556 come with a threaded hole?
Willys Tech:
Yes that is correct is the early style that is threaded.
Yes that is correct is the early style that is threaded.
Need brake master cyl for 1947 jeep with threaded hole, does your item #A556 come with a threaded hole?
Willys Tech:
Yes that is correct is the early style that is threaded.
Yes that is correct is the early style that is threaded.
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.
Willys Tech:
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.
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.
what is the measurement of the center between the two mounting holes?
Willys Tech:
It is approx 3 1/8 center to center just like original
It is approx 3 1/8 center to center just like original
What is the measurement of the center between the two mounting holes?
Willys Tech:
It is approx 3 1/8 center to center just like original
It is approx 3 1/8 center to center just like original
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.
Willys Tech:
The plunger is not included. We can get these good used. Please call us toll free.
The plunger is not included. We can get these good used. Please call us toll free.
need master cylinder with out threded hole for 1947 willys jeep
Willys Tech:
You need part number: 805223
You need part number: 805223
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