Another Radiator Fan Motor Seal Replacement

Topic: Another Radiator Fan Motor Seal Replacement (Read 3583 times) previous topic - next topic

Re: Another Radiator Fan Motor Seal Replacement

Reply #50 – December 22, 2023, 11:50:49 am

Another way is a gallon can of mineral spirits and a air powered syphon gun,cheaper then the brake cleaner and don't smell
as bad,another tip,if you need new lines they cost a little more but the braided stainless will stay flexable as opposed to the black
type.

Re: Another Radiator Fan Motor Seal Replacement

Reply #51 – December 26, 2023, 12:56:08 pm

Question is the fan hub center nut standard thread having a tough time getting it off, or does it need an impact wrench?
Thanks
Mike

Re: Another Radiator Fan Motor Seal Replacement

Reply #52 – December 26, 2023, 03:08:40 pm

The ones I have removed were standard thread and I use an impact never tried a breakover bar. No good way to hold a back up.

Mike

Re: Another Radiator Fan Motor Seal Replacement

Reply #53 – December 26, 2023, 03:35:15 pm

Make sure you use a 6 point socket with the impact,I'm assumming it's not reverse threads.

Re: Another Radiator Fan Motor Seal Replacement

Reply #54 – December 26, 2023, 04:18:19 pm

They are standard RH thread, at least mine were.

Re: Another Radiator Fan Motor Seal Replacement

Reply #55 – December 26, 2023, 06:36:05 pm

Thanks guys I looked at the threads on the pictures of the project coach from Mike, appreciate the help though,

Re: Another Radiator Fan Motor Seal Replacement

Reply #56 – December 29, 2023, 12:09:02 am

When you do this job check the supply line going from hydraulic pump to first fan motor. Ours had a chafe where it was tied to another line that wore through and caused us a major breakdown incident. Funny story I now have a repair kit and know that I can get one of these hoses made up at any NAPA so I am a lot less worried these days about it. But it was a huge problem at the time!

Re: Another Radiator Fan Motor Seal Replacement

Reply #57 – December 29, 2023, 12:34:38 am

I'm wondering if hydro hose fittings are available, like a weatherhead fitting ?
Other than Cat hoses with their 3x and 5x line's which have to have a machine to build those small lines on our coaches can be fixed with a WH fitting and 2 wrenches. Closest I can think of is AN fittings on fuel lines etc. screw on the outside then screw in the inner part.
Maybe I spent too much time in the field crawling around yellow iron ?

Re: Another Radiator Fan Motor Seal Replacement

Reply #58 – December 29, 2023, 01:07:02 am

I'm sure they are. Try a marine supply store, or any hydraulic shop.

Re: Another Radiator Fan Motor Seal Replacement

Reply #59 – January 05, 2024, 10:50:15 am

If you have a National Oil Well store nearby they can get/have fittings,they use a brand called Aeroquip,you can make the hose up yourself,have made hoses for years from 1/4 inch up to 2 inch.Anywhere there is oil and gas they have a store.

Re: Another Radiator Fan Motor Seal Replacement

Reply #60 – April 15, 2024, 09:28:17 pm

Ok anyone see this pump and seal and replaced theirs??

I had ordered the 20x30x7mm seals others have mentioned but apparently I have different motors and seals.

Mine weren't leaking horribly, I was just trying to get most of the bigger leaks taken care of. I'm reluctant now to mess with this without some guidance....inclined to put it all back together and try some power steering stop leak unless someone speaks up with advice on these pumps/seals.

Re: Another Radiator Fan Motor Seal Replacement

Reply #61 – April 15, 2024, 09:29:19 pm

Quote from: campipilot – April 15, 2024, 09:28:17 pm

Ok anyone see this pump and seal and replaced theirs??

I had ordered the 20x30x7mm seals others have mentioned but apparently I have different motors and seals.

Mine weren't leaking horribly, I was just trying to get most of the bigger leaks taken care of. I'm reluctant now to mess with this without some guidance....inclined to put it all back together and try some power steering stop leak unless someone speaks up with advice on these pumps/seals.

Re: Another Radiator Fan Motor Seal Replacement

Reply #62 – April 15, 2024, 09:58:05 pm

Got the motor make and model.

Re: Another Radiator Fan Motor Seal Replacement

Reply #63 – April 15, 2024, 10:18:45 pm

From your picture the seal is 20-47-7. See if your have a seal shop in your area and go get the
seals from there. Take your picture into them and they will look after you. I would not put it back
together without new seals. When you put the new seals in grease the seal lip before installing the m.

Re: Another Radiator Fan Motor Seal Replacement

Reply #64 – April 15, 2024, 10:46:29 pm

Quote from: campipilot – April 15, 2024, 09:58:05 pm

Got the motor make and model.

Curtis,

I'm pretty sure you already saw my old post on my fan motors, but if not, linked below. Same as your motors. I'd forgotten all about my search for a seal kit way back then. If you do find a source for seals at a reasonable price, I might get motivated enough to get greasy and tackle re-sealing our motors. Not a prospect I relish.

hydraulic fan motor

Re: Another Radiator Fan Motor Seal Replacement

Reply #65 – April 15, 2024, 10:52:54 pm

Pull one of your seals, have a bearing and seal shop
match them up, hydraulic shop may be able to help too.

Re: Another Radiator Fan Motor Seal Replacement

Reply #66 – April 16, 2024, 06:53:04 am

Quote from: Chuck & Jeannie – April 15, 2024, 10:46:29 pm

If you do find a source for seals at a reasonable price, I might get motivated enough to get greasy and tackle re-sealing our motors.

Chuck,

Less than $10 bucks seems reasonable to me. The only thing better would be free or less. Here is you a link if you don't have a Motion Ind. in your area. EAI Oil Seal 20mm X 47mm X 7mm TC Double Lip w/Spring. Metal Case w/Nitrile...

Can't help with motivation though.
Mike

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Re: Another Radiator Fan Motor Seal Replacement

Reply #67 – April 16, 2024, 08:29:31 am

Quote from: Pamela & Mike – April 16, 2024, 06:53:04 am

Chuck,
Less than $10 bucks seems reasonable to me.
Can't help with motivation though.
Mike

Yes, I could probably scrape up that much cash. I don't remember WHY I had so much trouble finding fan motor seals when I was looking 8 years ago. As I recall, it wasn't as simple as just running down to the local hydraulics shop...we certainly have lots of those around here in the Oil Patch. Perhaps I was just as lazy then as I am now. Of course, I never actually removed my motors, so I couldn't read the seal number at that time. I was just doing a search based on the motor ID plate info.

Anyway, my motors are still just seeping a little - not actually leaking - so not a critical problem. I'll let Curtis play around with his motors, and if he tries re-sealing them, we'll see if the seals work as expected. If they do, THEN I'll think about addressing my motivation problem. Until then, I'll just sit here in my armchair and have a nap..........

Re: Another Radiator Fan Motor Seal Replacement

Reply #68 – April 16, 2024, 09:37:59 am

Looked up the Motion Ind.,have one nearby in Memphis.

Re: Another Radiator Fan Motor Seal Replacement

Reply #69 – April 16, 2024, 01:18:00 pm

Quote from: Chuck & Jeannie – April 15, 2024, 10:46:29 pm

Curtis,

I'm pretty sure you already saw my old post on my fan motors, but if not, linked below. Same as your motors. I'd forgotten all about my search for a seal kit way back then. If you do find a source for seals at a reasonable price, I might get motivated enough to get greasy and tackle re-sealing our motors. Not a prospect I relish.

hydraulic fan motor

Ok Chuck....heres another project for ya.....if we were closer I'd come help do the messy job as it seems I'm going to be pretty experienced 😳. ....and maybe a tad bit more nimble as you have a few more years of wisdom.....but I am getting pretty stiff myself.

The seals: I'll confirm fit

Shaft Oil Seals TC 20x47x7 – AVX Seals Store

Re: Another Radiator Fan Motor Seal Replacement

Reply #70 – April 20, 2024, 03:29:07 pm

Ok the job is done. Of note, on my '93 U280 the radiator tube does not run under the fans and there is no need to mess with the radiators or fluid. I was able to poke a hole in the old seals with a pick, tried to screw a screw in but wasn't working and I was able to just pry the seals out. A woodruff key was a bit in the way to R and R the seals, the first one I was able to pop out with effort, the second I couldn't. The taper of the shaft actually made it easy to get the seals off and on over the woodruff key, I wouldn't mess with the keys.
I had drained the reservoir by siphoning, it drains slowly and I pulled a few lines at the fans off and let it drain a day before getting to work on the messy job removing the fans. .....if you like your clean concrete driveway I'd suggest doing this job in your neighbor's driveway when they're gone on vacation. 👍👍👍😜
I was a bit concerned about whether the system would refill its lines, motor and fans without cavitation when I was done. It took about a minute or two of running then the fans started turning. All seems good so far.

This was happening before this job but my fan system seems to have a surging when idling ....sort of a whoooup, whoooup, every five or ten seconds, not always but often, seems to go away off idle....any thoughts?
'Hoping it's not any issue to worry about with the motor.

Curtis

Re: Another Radiator Fan Motor Seal Replacement

Reply #71 – April 20, 2024, 05:11:35 pm

Quote from: campipilot – April 20, 2024, 03:29:07 pm

This was happening before this job but my fan system seems to have a surging when idling ....sort of a whoooup, whoooup, every five or ten seconds, not always but often, seems to go away off idle....any thoughts?

Curtis,

I think I recognize the weird surging "thing" you're talking about when your engine is idling. Our coach also does that, not on every start but sometimes. Usually happens after a cold start, when it has been sitting for a longish period of time. It always goes away as soon as I raise the idle up a little (with the cruise control). It has never been associated any other recognizable problem. I have no idea what causes it - and since it seems to be harmless I have never worried about it.

Congrats on getting the seals installed. After you've put a couple hundred miles on them, try to remember to come back and tell us if they are still holding up well.

Cheers

Re: Another Radiator Fan Motor Seal Replacement

Reply #72 – May 27, 2024, 07:18:03 pm

Quote from: Chuck & Jeannie – April 20, 2024, 05:11:35 pm

Curtis,

I think I recognize the weird surging "thing" you're talking about when your engine is idling. Our coach also does that, not on every start but sometimes. Usually happens after a cold start, when it has been sitting for a longish period of time. It always goes away as soon as I raise the idle up a little (with the cruise control). It has never been associated any other recognizable problem. I have no idea what causes it - and since it seems to be harmless I have never worried about it.

Congrats on getting the seals installed. After you've put a couple hundred miles on them, try to remember to come back and tell us if they are still holding up well.

Cheers

The sound sounds like surging in the hydraulic fan system. I'll keep an eye one it. ...and check to see if fan speed surges with the sound.

Planning a trip in a couple weeks. I'll let y'all know if my leaks are solved , fingers crossed...all good so far just running it in the driveway so far.

Re: Another Radiator Fan Motor Seal Replacement

Reply #73 – May 28, 2024, 09:06:00 am

As Bruce said in post 65 best bet is to pull a seal--from what I am seeing on these post there is more than one size for the fan motors when I replaced my seals they were 20 ID x 30 OD X 7 thick-- I got my seals off Ebay they were CR brand(Chicago Rawhide)
I think I paid 10.00 for 5 seals--currently they are 9.00 each
Chris

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