How to Correctly Position Oil/Grease Seal in Trailer Hub

Question

Question:

SORRY WHAT IS THE CORRECT POSITION OF FACES THE SEAL IN A HUB OF TRAYLER THANK

asked by: SEBASTIAN M

0

Expert Reply:

An oil seal like Redline part # 9103309 installs in the back side of the hub (the side nearest the trailer's frame) with the sides or "legs" of the seal inserted into the hub's bore. This means that the flat metal surface of the seal will face the trailer frame.

The linked photo of a seal will show you both sides and indicates the direction in which it should be installed into the hub.

I have linked both an article and video on seals that may be helpful to you.

expert reply by: Adam R

0

click to enlarge

Chip H.

6/23/2020

Which way does the Timken seal go into the hub. One side has what looks like a small spring inside.

Reply

Chris R.

6/26/2020

The open side where you can see the spring is the side that'll face towards the hub as you insert it into the bore. You'll follow the same procedure described above (and in the video I linked below) for your double lip seal.

Helpful Links

tv-install-grease-seals-repacking-bearings-rg06-050.aspx

Reply

Chip H.

6/26/2020

@ChrisR Thank you, first time replacing bearings and seals.

Reply

Chris R.

6/30/2020

@ChipH No problem!

Reply

Answer 1

When replacing a grease seal, the metal part of the seal will face towards the inside of the trailer and the rubber part of the seal will face toward the back side of the wheel. The air side of the seal is the flat side of the seal and faces out when…

view full answer...

Answer 2

I think the best way to explain how to install a grease seal like #10-9 is to take a look at the video I have linked. Go to about the 6 minute, 10 second mark. At this point in the video, our installer begins to install the seal in the back of the…

view full answer...

Answer 3

The BTR and BT8 denotations refer to the spindle, not the trailer hub. The difference between a BTR and BT8 spindle is that the BTR spindle uses a 1.063" diameter L44649 bearing and the BT8 spindle uses a 0.99" diameter L44643 bearing. In…

view full answer...

Answer 4

There are a number of reasons why the brakes on your trailer may not be working. Lets start with the easiest things to check. First, check the vehicle and trailer connectors for corrosion. This can cause a short inside the connector and the brake…

view full answer...

Answer 5

When installing a seal at the back of a hub the outer part of the seal will need to be flush with the hub. I have linked a video that should help. You could watch the whole video or fast forward to the 1 minute, 50 second mark to see the seal…

view full answer...

Answer 6

I attached a chart that has all of the recommended lug nut torque specs for trailer wheels. Based on your studs being 1/2 inch, your wheels being 15 inches in diameter, and your lug nuts being coned you would want to torque your lug nuts to 90-120 ft…

view full answer...

Answer 7

A BT8 spindle would have a diameter of .99 of an inch where the bearings would both install and would have a diameter of 1.24 where the great seal would ride. That would require a hub part #AKIHUB-440-2-1K for an idler hub. A BTR spindle would have…

view full answer...

Answer 8

For a grease seal that will replace your existing National 412920, you can use the TruRyde Grease Seals #RG06-070. These feature the same inner and outer diameter as the National model that you referenced and will work well. This seal is also…

view full answer...

Answer 9

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

view full answer...

Answer 10

The attachment bolts for a 5-bolt brake assembly like the part #AKEBRK-6R should be torqued to 30-50 foot/lbs. If you don't have a torque wrench handy, if you tighten the bolts until the lock washers flatten out, you'll be pretty darn close…

view full answer...

Answer 11

You can check the condition of your hub's races by carefully removing all bearing grease with a rag to expose the actual surface of the races. When they are completely free of grease, etc., inspect them for any signs of scoring (very slight…

view full answer...

Answer 12

If the brake magnet is worn to the point that the windings are visible then you know it's time to replace the magnet. However, magnets can also fail without the visible signs of wear. Check out the FAQ article I attached on testing brake magnets…

view full answer...

How to Correctly Position Oil/Grease Seal in Trailer Hub

Product Page this Question was Asked From

Featured Help Information

Miscellaneous Media

Continue Researching