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OEM Wagner Wheel Cylinders - 66 CJ-6A

Mark Zanoni

Mark Zanoni

Member
Hi all - I've started diving into this CJ-6A, first up is to get it rolling free, which started with getting drums apart and sorting out the binding. These two wheel cylinders came out of the front two wheels - do they look like factory wheel cylinders or aftermarket? Also does it make sense that both L & R sides would be the same (i.e. where the brake line ties in)? Bonus question, the backing plate has this part number still visible (is it 936986 or 986936??) but it doesn't match up to the part number in my 1967 parts book for a front backing plate. Any thoughts on the originality of this as well?
https://www.earlycj5.com/index.php?media/12924/
https://www.earlycj5.com/index.php?media/12923/
https://www.earlycj5.com/index.php?media/12922/
https://www.earlycj5.com/index.php?media/12921/
 
According to the Willys LOPN (List of Parts Numerical) 936986 is described as "Front Brake Assembly - RH", and specified as a Wagner FF-40318-C.

My Wagner Catalogs are at home, but I am not.
 
Keep in mind, the Tuxedo Park models had different/larger brakes than the standard CJ 5/6. This applies to the F134 models, and may carry over to the V6 models.
 
W2SNO - Thanks for the info. Looks like that PN matches but the stamping is FF-46261. I'll have to check the LH this weekend. Looking forward to hearing back when you are able to check your Wagner book for the wheel cylinders.
 
I can't seem to post photos of the catalog, so here is some useful info.

Wagner Part Numbers. 1964-1966
These are Tuxedo parts for 4 cyl and 6 cyl CJ5A/CJ6A (not the same as CJ5/CJ6)

Front (both) wheel cyl part number -F40965 (casting FD 23536) One inch bore Kit F13700
Rear Left - F48418 Both Rears Casting Number FD45954 13/16 bore Kit F13701
Right Rear - F48419
 
Thanks so much for the information. Looks like I have all original brake parts still, I'm wondering if the 55k miles on the odometer is accurate.
 
Your welcome. The Wagner master catalog 1980 and earlier is about a foot tall stack.
If there is other Wagner info you need let me know.
 
I wouldn’t count on your wheel cylinders being the same ones installed at the factory. It was very common to replace wheel cylinders with Wagner or Lockheed parts when servicing the brakes. They were cheap and saved time over honing and installing a rubber kit. Back in the day, we didn’t have all the aftermarket/offshore parts available, and most cars were equipped with drum brakes, so quality OEM parts like wheel cylinders were stocked at every parts store.
 
Keys5a said:
I wouldn’t count on your wheel cylinders being the same ones installed at the factory. It was very common to replace wheel cylinders with Wagner or Lockheed parts when servicing the brakes. They were cheap and saved time over honing and installing a rubber kit. Back in the day, we didn’t have all the aftermarket/offshore parts available, and most cars were equipped with drum brakes, so quality OEM parts like wheel cylinders were stocked at every parts store.
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I would agree, a bit of a toss up on originality. I was considering whether or not to have these rebuilt but was able to find all NOS Wagner-Lockheed wheel(s) and master cylinder at a much cheaper cost. Just sorting through my brake line set up and if I want to stay with the original single outlet MC and 4-hole distribution block or dual outlet MC and 3-hole front block. Let me know if there's an advantage to one style or the other.
 
Question - two cylinders per wheel? 9" or 10" brakes?

936986 is consistent with part numbers from the early '60s era.

I don't think the mileage rules out having the original wheel cylinders. More usually atmospheric water gets in the brake fluid with age, settles in the low spots and rusts the cylinders. If POs had changed the brake fluid every dozen years the original cylinders could be ok.
 
timgr said:
Question - two cylinders per wheel? 9" or 10" brakes?

936986 is consistent with part numbers from the early '60s era.

I don't think the mileage rules out having the original wheel cylinders. More usually atmospheric water gets in the brake fluid with age, settles in the low spots and rusts the cylinders. If POs had changed the brake fluid every dozen years the original cylinders could be ok.
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10" brakes, one wheel cylinder per wheel. The brake lines were like the body - mostly rusted out. Also the shoes were all bonded linings, not sure if in 66 they would still be riveted or not.
 
OEM would be riveted as I recall.
Usual parts store replacement by the '70s was bonded, though you could buy riveted (premium-ish).
No way the original linings would last 55K miles.
IME 20K interval is more typical - drums don't have the service life of disks.
 
For what its worth, I looked up some brake parts in Catalog 1195-R1 for specific Tux parts. Most of the parts are shared with later V6 models, Tux and regular CJ5. The shoes are 10” x 2” and “lining” is #938101, while all 4 backing plates are #938100. Both front 1” wheel cylinders are the same part #938115, while the rear 13/16” cylinders are handed, left rear #938116, and right rear #938127. All the parts above are for manual adjusting drum setups.
 
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