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4x4 Front Hub O-Ring


85_Ranger4x4

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Rock Auto 5% Discount Code: 70D65189E6D8FF: January 5th, 2022

c094728

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I tried the Napa part # 727-2153 for my 88 ranger manual hubs but they were at least an inch to large
 

85_Ranger4x4

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I tried the Napa part # 727-2153 for my 88 ranger manual hubs but they were at least an inch to large
Older trucks use a smaller o-ring:

The correct size for the factor hub o rings on the 1980-91 rangers is 3.109" I.D., 3.387"O.D this is the oring standard AS568-235. These can be purchased from Grainger in a pack of 10. Item #: 41UM71
 

fixizin

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OK, this entire most-excellent thread has covered the O-ring on the backside of the hub... should we start a separate thread for Duh PVH hubs, which also have a smaller O-ring (approx. 2.65" dia) on the front side, which actually gets covered by the PVH hub itself, and maintains vacuum in the main "cylinder" of the PVH mechanism... ???
 

fixizin

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Hello, is this thing ON?? :icon_confused:
 

ericbphoto

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What’s your question? If you want a separate thread, go ahead and start one. Thats the only question I see you asking. So there isn't really anything in your post for people to comment on unless Dirtman’s butt itches.

Regarding the PVH hubs, it seems to me that they are generally regarded as unreliable and most people convert to live axle or some other style hub.
 

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Grrr, I just went with the first post as it came up as a preview in Google search.

'89 Ranger, V6, Dana 28, manual hubs. The NAPA 727-2153 is too large for me, too, as explained above.

Thanks for pointing me to the correct one.
 
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Shack_302

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OK, this entire most-excellent thread has covered the O-ring on the backside of the hub... should we start a separate thread for Duh PVH hubs, which also have a smaller O-ring (approx. 2.65" dia) on the front side, which actually gets covered by the PVH hub itself, and maintains vacuum in the main "cylinder" of the PVH mechanism... ???
Been looking for that replacement o ring today and yesterday. Ford dealership can't even get me it. Any chance you'd know where to find it?
I found this kit on eBay that includes the ring and its part # ( F87A-3N320-BA ). https://www.ebay.com/itm/97-03-Ranger-96-01-Explorer-OEM-Ford-Pulse-Vacuum-4x4-Front-Locking-Hub/172428789337. But they don't sell it separately and neither does anywhere else. Nothing comes up when that part # is entered into google. Any help would be greatly appreciated and if I won't be able to fine one, any advice on what to use in replacement of that seal.

Also found this o ring on rock auto and it seems it measures to be the same or very close to the ring I have but says for rear hub.
2.22 ID X 2.287 OD X 0.067 Thick; Hub to Hub Lock
 

fixizin

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FYI: the backside 3.50" I.D. x 3/32" thick O-Ring that is the subject of this thread is sized for a stretched-tight fit! i.e. the "land" (not groove) diameter is 3.94"... the groove DEPTH is about 0.06, so that's about 3.82" groove dia. = 0.32" undersize on the O-ring, or 0.16" radius undersize, but hey, I used them, and it seems to work... gotta use similar factors on sizing the FRONTside O-ring.
 

ericbphoto

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There is more than one size. There are different hub sizes.
 

dvdswan

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