Replacing the Bearing, Races and Seals on a Trailer Hub

Wheel bearing replacement kit

No parts are more critical for the dependable performance of your trailer than the bearings, races, and seals. To ensure that your trailer performs reliably, you should inspect the bearings, races, and seals and repack the bearings every 12 months or 12,000 miles.


Watch the removal, inspection, and installation of trailer wheel bearings

Parts and Tools
Wheel bearing replacement kit Replacement seal for trailer wheel bearing Trailer wheel bearing grease Replacement spindle for trailer axle Bearing Buddy bearing protectors Grease cap for trailer wheel hub Wheel bearing packer - grease Wheel bearing seal puller Grease gun
Bearings, races, and bearing kits Seals Grease Spindles Grease caps and bearing protectors Greasing tools: bearing packers, seal pullers, and grease guns

Recommended Bearing Grease

Application# 1# 2# 3
Two-axle boat trailer
Boat Trailer
Marine wheel bearing grease in 14oz cartridge LMX red industrial strength grease Conventional wheel bearing grease
LubriMatic marine wheel bearing grease LubriMatic LMX industrial strength "Red" grease LubriMatic wheel bearing grease
Small camping trailer
Camper
LMX red industrial strength grease Conventional wheel bearing grease Marine wheel bearing grease in 14oz cartridge
LubriMatic LMX industrial strength "Red" grease LubriMatic wheel bearing grease LubriMatic marine wheel bearing grease
Two-axle flatbed utility trailer
Utility Trailer
LMX red industrial strength grease Conventional wheel bearing grease Marine wheel bearing grease in 14oz cartridge
LubriMatic LMX industrial strength "Red" grease LubriMatic wheel bearing grease LubriMatic marine wheel bearing grease




Take off the Wheel and Hub


Remove Cap

Remove Tire and Grease Cap:



Remove Nut

Remove Castle Nut on the Spindle:



Remove Hub

Remove the Hub:





Disassemble the Hub


Remove Bearing

Remove Outer Bearing:



Remove Bearing and Seal

Remove Inner Bearing and Seal:



Cleaning Bearing

Clean and Inspect Bearings:


trailer wheel bearing Shop for wheel bearings


Seal Part Number

Check the Seal:


trailer wheel bearing grease seal Shop for grease seals





Inspect the Race


Inspect Race

Check the Race:


Remove Race

trailer wheel bearing race Shop for races


Remove the Races:



Clean Hub

Clean Hub:



Clean Spindle

Clean and Inspect Spindle:


trailer axle spindle Shop for spindles





Reassemble the Hub


Reassembly Hub

Begin to Reassemble the Hub:



Grease Race

Grease the Races:





Repack the Trailer Bearings


Pack Bearing

Pack the Bearings:


wheel bearing packer Shop for bearing packers



Install Seal

Insert Inner Bearing and Seal:



Insert Outer Bearing and Seal:



Install Seal

Install Washer and Nut:



Nut Adjustment

Final Castle Nut Adjustment:


spindle nut for trailer axle Shop for spindle nuts, washers, and retainers





Install the Dust Cap or Bearing Protectors

The dust cap will install directly over the castle nut. You should be able to start installation of the dust cap with your hands by pressing it into the center of the hub. After it has been started, use a piece of wood to tap it in the rest of the way. Make sure the outer lip on the dust cap is tight against the hub or drum. The wood will help you to avoid damaging the dust cap.


The main purpose of bearing protectors is to keep out water. A grease-filled hub will have some pressure built up inside, and this is what prevents water from seeping in. When filling the bearing protectors with grease, be careful not to overfill them. To help prevent overfilling, the bearing protector will have a small hole that allows the excess grease to spill out the side.


It is not a good idea to fill the hub with grease on every trip. If the release valve is clogged, or the hub runs out of room, the grease will probably blow out through the grease seal. If you have brakes on the trailer and the seal fails, the brake shoes will be contaminated and will need to be replaced.


It is good practice to fill the hub until grease starts to move the pressure spring on the bearing protector. Check it to see whether the spring has gone down then add a little more. Bearing protectors come with bras (or covers) that are designed to keep the excess grease from flinging out of the release valve and help to keep your wheel clean.


trailer wheel bearing bearing protectors Shop for grease caps and bearing protectors





Replacement BearingsRace
Part No.DescriptionI.D.Part No.O.D.
L44643Inner/Outer for BT81.000"L446101.980"
L44649Inner/Outer for BTR, Outer for #84 Spindles1.063"L446101.980"
L68149Inner for 3.5K Axles1.378"L681102.327"
L68149Inner for 4.4K Axles1.378"L681112.362"
1779Outer for 22834 Hub0.938"17292.240"
2788Inner for 22834 Hub1.500"27293.000"
LM48548Inner for AH25555F Agricultural Hub1.375"LM485102.563"
LM67048Outer for 8-201-5, 8-213-51.250"LM670102.328"
15123Outer for 42655, 42656, 8-174-51.250"152452.441"
14125AOuter for 42865, 42866, 8-219-4, 8-231-91.250"142762.717"
25580#42, 8K, 9K, Inner (Pre 10/89), Outer for #991.750"255203.265"
31-71-350MM Cartridge Style, Nev-R-Lube50MM - -
31-72-335MM Cartridge Style, Nev-R-Lube35MM - -
31-73-342MM Cartridge Style, Nev-R-Lube42MM - -
02475Outer for 8-231-8, 8-218-9, 8-187-71.250"024202.688"
2585Outer for 8-232-51.313"25202.750"
387AOuter for 8-214-5, Inner for 8-260-52.250"382A3.813"
395SInner for 8-214-52.625"394A4.331"
3984Inner for 8-216-5, 8-214-8, 8-217-5, 8-272-52.625"39204.438"
28682Outer for 8-216-5, 8-214-8, 8-217-5, 8-727-52.250"286223.844"
28580Inner for all #99 Spindles2.000"285212.875"
JM205149For 090814 Hayes 10K1.969"JM2051103.543"
JM511946For 090814 Hayes 10K2.559"JM5119104.331"
HM212049Outer for 20K - 25K Axles2.625"HM2120114.813"
HM218248Inner for 20K - 25K Axles3.542"HM2182105.786"
LM11949Outer for AH15450E Agricultural Hub0.750"LM119101.781"
29749For AH30660F Agricultural Hub1.500"297102.563"
501349Outer for AH60880F, Inner for AH35660F1.625"5013102.891"
506849For AH60880F Agricultural Hub2.165"5068103.543"
603049For AH45880F Agricultural Hub1.781"6030113.063"

Wheel Bearing Kits
Part No.Outer BearingInner BearingSealSeal I.D.
BK1-100L44643L44643348231.249"
BK1-150L44649L4464910-601.500"
BK2-100L44649L6814910-191.719"
BK3-100151232558010-362.250"
BK3-110151232558010-102.125"
BK3-20014125A2558010-362.250"
BK3-21014125A2558010-102.125"
BK3-310LM670482558010-102.125"
BK3-300LM670482558010-362.250"
DL21792L44643L4464334823 (12192VB) 1.249"






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What our customers are saying:

WOW! I am impressed! I called to place my order and real person answered, spoke perfect English, albeit a slight southern accent, and my order was sent within a day, shipped quickly and I had it a few days later. I saved over a hundred dollars over local and installed it my self. I cant imagine how that they could do any better. THANKS!

Eric

Cedar Springs, MI

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