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Thread: Bearing Service
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09-02-2018, 05:28 PM #1
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Bearing Service
A few observations after performing bearing service on over thirty axles in the last two weeks:
1. Bearing and brakes should be serviced/inspected every 12 months, or 12,000 miles. Interesting note current LCI manual says 12 months or 36,000 miles. I understand some low mileage owners may stretch the every 12 months... Danger, Peligro, low mileage means more stationary time, more opportunity for moisture and grease breakdown.
2. If you have axles built before mid May 2017, the seals need to be checked.
3. Brakes are to be replaced in pairs. If the right front gets replaced because of a leaking seal, the left front brake should also be replaced regardless of condition. Don’t let your dealer replace one side only.
4. What is the surest tip off to a bearing problem during disassembly:
a) too much grease
b) too little grease
c) old grease
d) castle/bearing retainer nut more than finger tight after removing the cotter pin or the keeper used by Dexter.
The answer is D. Almost every time a tight retainer nut was found a damaged bearing was found
No matter how tempting it may be DO NOT OVER TIGHTEN. It is tempting, just a little turn with a wrench or socket and the cotter pin will fit. JUST SAY NO.
5. The new Lippert bearing greasing process is working. It is amazing how little grease Lippert is using. The bearings are greased adequately with high quality grease. Little or no grease in the middle of the hub between the inner and outer bearings.
6. Dexter is using high quality grease, but more than Lippert. Some quantity of grease in the open area of the hub.
7. I wasn’t taught to pack grease into the middle of the hub with the idea the grease would move into the bearings as needed. I took apart a fair number of hubs with heavily churned and black grease in the bearings and pristine red grease in the hub right next to the bearing. That stuff doesn’t move.
ColanColan and Marilyn Arnold
Des Moines, IA - kind of, on the road full time.
Currently in Durango, Colorado
Momentum 350M originally, now a 397TH
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09-09-2018, 09:32 PM #2
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@carnolddsm
Hey Colan:
Why don't you do a video on performing bearing/break service on an RV. I need some guidance. Bet others would appreciate it, too.
Thanks.
-SteveSteve and Renee
2018 Solitude 310GK, disc brakes, Morryde SRE4000/XFactor with heavy duty shackles
2012 Ram 3500 SRW 6.7 Diesel, air bags
18k B&W Companion, non-slider
640 watts solar, 400 amp-hour Lion Safari UT 1300 battery bank
Aims 1500 watt inverter/charger with ATS
Somerset, WI
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09-10-2018, 06:20 AM #3
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Great info Colan.
RedLocation - Wherever the road takes us...Full-timers
2015 Momentum 380
2019 Ram Dually
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09-10-2018, 09:09 AM #4
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Nice write-up, Colan, and it mirrors exactly what experience has taught me over the years.
Safe Travels.
JimJim & Gwen
2015 Solitude 379fl, VIN 573FS4324F1102454
2011 F-350 SC, DRW, 6.7 PSD, Ride-Rite Air Bags, Pull-Rite 20.5 K
"You can't get lost if you don't care where you're going"
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09-12-2018, 08:46 PM #5
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Colan serviced my bearings at the Indiana Rally ... even in a little rain. Good for another year. Thanks!
Mike & Pat Clawson
Marty & Bucky (Welsh Corgis)
2015 Grand Design Reflection 337 RLS #2813
Titan Disc Brakes, Liberty Rider Suspension
2005 Chevy Silverado 2500HD Duramax/Allison
Comfort Ride Hitch, 52 Gallon Titan XXL Fuel Tank, Banks Speed Brake, Firestone Air Lift Bags
http://i1383.photobucket.com/albums/...pst4uyouma.gif
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09-20-2018, 07:27 AM #6
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Item 8: I’ve used Timken seals almost exclusively since the greased brake issue started. The extra expense may not be necessary. The standard Lippert and Dexter seals appear to be working. Of the four trailers with greased brakes all had never had bearing service and were manufactured before the start of Lippert’s new process in early 2017.
If you use Timken seals the least expensive source I’ve found is CARiD.com. A little over $10 for the 412920 seal. Have a little patience when ordering. You may get partial orders on different days.Colan and Marilyn Arnold
Des Moines, IA - kind of, on the road full time.
Currently in Durango, Colorado
Momentum 350M originally, now a 397TH
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10-07-2018, 01:45 PM #7
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Colan what number is the race that goes to the smaller bearing. 123?
Sent from my iPhone using TapatalkMike & Debbie
Hot Springs, Ar
2014 Ram 2500 4x4 Short Bed Diesel
B&W Companion 5th Wheel Hitch
2014 Reflection 303 (#405)
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10-07-2018, 02:49 PM #8
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10-07-2018, 03:08 PM #9
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Thanks Jim!
Sent from my iPad using TapatalkMike & Debbie
Hot Springs, Ar
2014 Ram 2500 4x4 Short Bed Diesel
B&W Companion 5th Wheel Hitch
2014 Reflection 303 (#405)
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10-07-2018, 04:53 PM #10
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Mike,
A table of bearings and seals by axle capacity. Note Lippert and Dexter use the same bearings and seals for each weight of axle.
Inner Bearing Outer Bearing Seal -Timken Bearing Race Bearing Race (Cone) (Cup) (Cone) (Cup) 7,000 25580 25520 14125 14276 412920 6,000 25580 25520 15123 15145 412920 5,200 25580 25520 LM67048 LM67010 412920 4,400 L68149 L68111 LM67048 LM67010 473336 3,500 L68149 L68111 L44649 L44610 473336 Last edited by carnolddsm; 10-07-2018 at 05:13 PM. Reason: Reposted with better formatting
Colan and Marilyn Arnold
Des Moines, IA - kind of, on the road full time.
Currently in Durango, Colorado
Momentum 350M originally, now a 397TH
New from California
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