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Tires, Wheels, Brakes, Steering and Suspensions Discussion of preventative/corrective maintenance and other technical issues regarding your coach's Tires, Wheels, Brakes, Steering and Suspensions and related components.

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  #1  
Old 06-16-2020
DFB052686's Avatar
DFB052686 DFB052686 is offline
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Default 87 FC Rear Axle seals?(leaking inside the wheels/tires)

Went out to the bus, moved it back into place after checking a few things over, noticed oil spots inside BOTH rear wheel areas. On the ground. Pics attached, it smells of gear lube. Has that bluish dark color.

Anyone familiar with what fluid it might be? (In case it’s special I can replace with the same, synthetic Likely? Friction modifiers added to any?)

Have an appointment to get a shop to replace whatever is ruined tomorrow morning. Can anyone point me towards the right part numbers for seals, bearings, from experience?

I did search. Both here on WOG, and online. Tried cross referencing parts from the 87-88 parts manual for the axle.

Only seal found here is: 2208X440, it’s the axle flange seal.
Bearing part numbers: cup: JM716610 cone:JM716649

Anything else to fix the leak? I’m going to ask to check the vent while it’s there
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-Dennis (direct email please! dennis@wanderlodgeowner.com)
Hesperia, California

1987 FC31 “A Rare Bird”
(300HP 3208TA/ZF)

Towables:
2007 Grand Cherokee CRD, 28’ Wells Cargo Express Wagon
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  #2  
Old 06-16-2020
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DFB052686 DFB052686 is offline
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Note: I’m aware it’s probably going to need brake shoes and hoping to get the chassis looked over in general before a road trip in a couple weeks, shop asked if I could bring parts/numbers to expedite the repair.

I’m grateful that the axle leak didn’t appear and impede my trip to Utah recently.
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-Dennis (direct email please! dennis@wanderlodgeowner.com)
Hesperia, California

1987 FC31 “A Rare Bird”
(300HP 3208TA/ZF)

Towables:
2007 Grand Cherokee CRD, 28’ Wells Cargo Express Wagon
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  #3  
Old 06-16-2020
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1984Lodge 1984Lodge is offline
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I had to take my seals out to get part number to get new seals.. would recommend you insist on scotseal XL.. they are a seal within a seal which means they do not ride on the axle tube surface.

Check out my video, I show the installation of them:
https://youtu.be/r4E_3O7bByQ

Here is a video explaining how they work:
https://youtu.be/SrMqKtU8a24?t=95
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Jeff LoGiudice
Jeff@GinosGarageUSA.com
Temple Terrace, Florida
1984 Bluebird PT40
#F063411 6V92TA & MT654CR
& 1986 MCI 102A3
6V92TA & HT740 (Sold)
YouTube-Gino's Garage https://www.youtube.com/user/xjrjeff
http://www.bbirdmaps.com/index.cfm #460
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  #4  
Old 06-16-2020
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DFB052686 DFB052686 is offline
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Quote:
Originally Posted by 1984Lodge View Post
I had to take my seals out to get part number to get new seals.. would recommend you insist on scotseal XL..
I was afraid “remove and inspect for #’s” Would be the only course.

I like your videos, I watched the entire thing. Good to see for a diy’er.

It looks like you were rebuilding the tag axle, I am getting into the drive on an FC, it’s looking like it’s an entirely different animal, I have attached a copy of my axle info sheet diagram and circled the part numbers mentioned above, so they can be referenced in place on the schematic.

Is there a sealing item missing from this diagram?
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-Dennis (direct email please! dennis@wanderlodgeowner.com)
Hesperia, California

1987 FC31 “A Rare Bird”
(300HP 3208TA/ZF)

Towables:
2007 Grand Cherokee CRD, 28’ Wells Cargo Express Wagon
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  #5  
Old 06-16-2020
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kunzelj kunzelj is offline
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That is for sure wheel seals and likely leaking for some time. Diff is probably also low on oil at this stage. It'll be a full brake service and I would probably have all four corners pulled off and inspected. Bearings, seals, brakes, S-cams, etc. Hopefully you don't find drums that needs to be replaced as those rear drums can be expensive or tough to find with the notches.
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Oakville, Manitoba, Canada
1988 FC-35SB 300HP/ZF (2016-current)
1978 GMC Royale 26' (2015-2016)
1982 FC-33SB 250HP (2007-2009)
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  #6  
Old 06-16-2020
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DFB052686 DFB052686 is offline
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Quote:
Originally Posted by kunzelj View Post
That is for sure wheel seals and likely leaking for some time. Diff is probably also low on oil at this stage. It'll be a full brake service and I would probably have all four corners pulled off and inspected. Bearings, seals, brakes, S-cams, etc. Hopefully you don't find drums that needs to be replaced as those rear drums can be expensive or tough to find with the notches.
For sure, you are right about all of it, the Amex is in the daylight and ready. Although it pains me to not do my own work, I am not comfortable with handling the whole Brake system at once right now so soon before a planned trip.

My question is still what’s the part number for the wheel seal? Hehe... the bearing race surely isn’t a “sealing surface” and that leaves the flat gasket at the end of the hub assembly that the axle bolts through. Is that the “wheel seal”? I was expecting something along the lines of the scotseal xl type of thing, a metal backed pressed in seal. I would like to gather parts or get them ordered for tomorrow’s appointment if possible.

Thanks for the help!

To ad an extra layer of mechanical interest: I realized. I had similar leaks once before after moving the bus. But it doesn’t happen all the time. I *suspect* that having some weight off the rear axle is enabling the leak. Is this a ridiculous theory?
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-Dennis (direct email please! dennis@wanderlodgeowner.com)
Hesperia, California

1987 FC31 “A Rare Bird”
(300HP 3208TA/ZF)

Towables:
2007 Grand Cherokee CRD, 28’ Wells Cargo Express Wagon

Last edited by DFB052686; 06-16-2020 at 09:15 PM.
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  #7  
Old 06-16-2020
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1984Lodge 1984Lodge is offline
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Unless one of the FC guys already has the number looks like it’s no dice on that drawing. I thought #27 might be it, but I think that’s the rear end shims.. . the manufacter usually spec the wheel end components for each customer so that is why that may not be listed. I just checked and my PT has the R125NX3 so the parts may be different.

As far as drums go you can notch the drums with an angle grinder.. it takes a bit of time and patience but it can be done and it works great..

This is my drum after I ground in the notches:
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Jeff LoGiudice
Jeff@GinosGarageUSA.com
Temple Terrace, Florida
1984 Bluebird PT40
#F063411 6V92TA & MT654CR
& 1986 MCI 102A3
6V92TA & HT740 (Sold)
YouTube-Gino's Garage https://www.youtube.com/user/xjrjeff
http://www.bbirdmaps.com/index.cfm #460
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  #8  
Old 06-16-2020
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Quote:
Originally Posted by 1984Lodge View Post
Unless one of the FC guys already has the number looks like it’s no dice on that drawing. I thought #27 might be it, but I think that’s the rear end shims.. . the manufacter usually spec the wheel end components for each customer so that is why that may not be listed. I just checked and my PT has the R125NX3 so the parts may be different.

As far as drums go you can notch the drums with an angle grinder.. it takes a bit of time and patience but it can be done and it works great..

This is my drum after I ground in the notches:
Attachment 69050
You sir are an artist with a grinder!
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2000 LXI 43
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  #9  
Old 06-16-2020
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DFB052686 DFB052686 is offline
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Join Date: Feb 2017
Location: Hesperia
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Default

Quote:
Originally Posted by 1984Lodge View Post
Unless one of the FC guys already has the number looks like it’s no dice on that drawing. I thought #27 might be it, but I think that’s the rear end shims.. . the manufacter usually spec the wheel end components for each customer so that is why that may not be listed. I just checked and my PT has the R125NX3 so the parts may be different.
27 is diff side gear thrust washer. Per the sheet.

I just realized you are correct entirely, there is no mention of wheel end hub components. Good to know. But frustrating. Ah well.
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-Dennis (direct email please! dennis@wanderlodgeowner.com)
Hesperia, California

1987 FC31 “A Rare Bird”
(300HP 3208TA/ZF)

Towables:
2007 Grand Cherokee CRD, 28’ Wells Cargo Express Wagon
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  #10  
Old 06-17-2020
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Default 1987 Wanderlodge WLFC wheel end components - drive axle

Quote:
Originally Posted by DFB052686 View Post
27 is diff side gear thrust washer. Per the sheet.

I just realized you are correct entirely, there is no mention of wheel end hub components. Good to know. But frustrating. Ah well.
..
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1991 40' WLWB-WTB
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1991 40' WB ...From 2008 - Present
1984 ½ PT-36 .From 2000 - 2008
1973 FC-31 .....From 1991 - 2001

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