QUESTION FOR THE UNIMATIC, PULSAMATIC, MULTIMATIC, ROLLERMATIC GUYS!


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Thread Number: 23822
QUESTION FOR THE UNIMATIC, PULSAMATIC, MULTIMATIC, ROLLERMATIC GUYS!

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Post# 370826 8/9/2009 at 22:06 (5,367 days old) by soberleaf ()
Checkrate/Likes ok guys, need to pick your brains please! i'm aquiring a nice little collection of rollermatics here, have 6 total now, all in various conditions, including the one i dropped off the truck and smashed to bits! the part i am having trouble finding is the spin shaft seal, or water seal as i call it. have plenty of bellows now, even found a couple oil bellows should i need them. but this spin shaft seal is very elusive. my question. i bought a spin shaft seal off the web for a rollermatic and it is part no. 5439025. the guy only had one and it did not come with the bronze mating surface although dave from dave's repair (who has been very helpful) said that the bronze peice seldom wears out, it is the carbon faced seal that goes, makes sense to me! in my repair master book for frigidaire unimatics and multimatics it lists the same seal, no 5439025 and says it fits the 57-58 pulsamatic and 59 multi speed mechanism. so does this 5439025 spin shaft seal fit all models, pulsamatic, multimatic, and rollermatic? and does anyone know where some may be located? and could i possibly pick up a stock water seal from a seal co. that would fit? i was told that 3 of the machines i got do leak during spin, but not wash, so i would guess the leaks are coming from the seal, not the water and oil bellows. also, while i'm on it here if i were to install several more drains in the outer tub of a rollermatic so the water drained very quickly and would never rise to the height where it meets the seal during spin do you think this would keep a bad seal from leaking? the nice thing about a rollermatic with it's solid tub is that the water only surrounds the spin shaft seal when the outer tub is initially holding a good quantity of water when it first starts it's spin. i would think the sooner that water is out of that outer tub the better! that's it, as always any ideas and facts and opinions will be appreciated.

Post# 370841 , Reply# 1 8/9/2009 at 22:25 (5,367 days old) by gyrafoam (Wytheville, VA)
Checkrate/Likes The Unimatic uses a Nut & Seal assembly that is a different critter than the Spin Shaft seal shown. GM was good for changing a lot of parts----if only slightly-----from year to year just to drive everyone crazy. Or the parts number. The one you show became the #633626 and does indeed fit the (N line) of Rollermatics. Snatch-up any you can find because you are dead in the water without them!

Post# 370850 , Reply# 2 8/9/2009 at 22:38 (5,367 days old) by soberleaf ()
Checkrate/Likes *i take it* the n line of rollermatics were only one of several "types" of rollermatics? was the n line the earlier year models? what were the other types?

Post# 370905 , Reply# 3 8/10/2009 at 07:46 (5,367 days old) by gyrafoam (Wytheville, VA)
Checkrate/Likes The "L" line '65-'66 and the "N" line '67-'68 (the last of the solid-tub Rollermatics) all used this same part.

Post# 370907 , Reply# 4 8/10/2009 at 07:53 (5,367 days old) by swestoyz (Cedar Falls, IA)
Checkrate/Likes Doesn't the letter by year designation go like this? J - 1965 (it wasn't used, but I've seen it spoken of in literature) K - 1966 L - 1967 N - 1968/69

Post# 370914 , Reply# 5 8/10/2009 at 09:16 (5,366 days old) by gyrafoam (Wytheville, VA)
Checkrate/Likes *Ben--* Well, go try to figure out what GM did. My parts manuals refer to them as L or N line. It would make sense if they did have a system such as you sugggest, but I am unaware of it if it exists-----because I have to base what I know by what I have. Nonetheless, I'm recording your information. Makes sense to me. (Of course, what ever happened to "M"?)

Post# 371031 , Reply# 6 8/10/2009 at 19:34 (5,366 days old) by swestoyz (Cedar Falls, IA)
Checkrate/Likes *(Of course, what ever happened to "M"?)* Well that is easy - first you have the General, then you have the Motors ;-)

Post# 371152 , Reply# 7 8/11/2009 at 06:40 (5,366 days old) by soberleaf ()
Checkrate/Likes *thanks for the info guys* i will continue my search for these hard to find seals.

Post# 1010148 , Reply# 8 10/8/2018 at 20:25 (2,020 days old) by sfh074 ( )
Checkrate/Likes 1 *To Clarify This Seal ....* the spin shaft seal, part number 5439025 was used from 1957 thru 1968. It changed to part number 633626 in 1965 with the rollermatics but some part books still use the old number all the way thru 1968. The only rollermatic that did not use this seal was the "S" line. On all 3 multimatics I have, this seal did not leak. It seems to be very well made and is held tight with no wobble to wear it out, due to a large ball bearing just underneath. I have been lucky not needing to replace this seal but have found that you can recondition them. Getting them off can be a bit tricky but with the right set of pliers it can be done without damaging the seal. Pic #1 shows how to remove the nut and pic #2 shows where to grab the main housing to prevent it from rotating while turning the nut. The remaining pics go on to show how to lap the carbon seal edge of the spin shaft seal ... and the bronze riding seal ... that mates up against the carbon seal. This bronze seal is underneath the inner tub support flange and both the carbon seal and the bronze seal press together to keep the water in the outer tub and out of the transmission. The only caveat is once you remove the old spin shaft seal you need to inspect the old seal for any damage to the rubber or carbon lip. Make sure the rubber is still soft and supple and no surface cracks. All the old seals that I have encountered in the past were still in very good shape and the rubber still soft. If you take your time to clean these seals and resurface the mating surfaces they will give many more years of service. I guess I don't need to mention these have been NLA for a very long time and finding a new one is next to impossible. Photos... < > Photo 1 of 7 View Full Size

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