Proper lubrication of trailer wheel bearings is essential to keep the wheels functioning correctly and reduce wear.
But, how do you know how much grease to put in a trailer wheel bearing?
While it is essential to ensure the wheel bearings are adequately lubricated, you should regulate how much grease should be used.
Too much grease can cause damage to bearing seals and cause a loss of lubrication which could lead to premature failure.
This article will explore the kinds of grease when to use it, and the effects of over-greasing.
How Much Grease To Put in a Trailer Wheel Bearing?
The amount of grease to put in a trailer wheel bearing will depend on the type and size of the bearing. Generally, you should use enough grease to fill two-thirds of the space in the bearing cavity. When using lithium complex or polyurea-based greases, the amount applied should be more than two-thirds but not more than three-quarters.
Using the correct grease is essential, as more will be needed to provide adequate lubrication and protection, while too much can clog the bearings and seals.
In addition to using the right amount of grease, it is also vital to ensure that you use the correct type of grease for your bearing. Lithium complex and polyurea-based greases are recommended for wheel bearings as they provide better protection against water, dirt, and dust than conventional greases.
Again, the seal your trailer wheel bearing uses will also affect the grease required. If your wheel bearing has a double lip seal, you should use a thicker lubricant to fill the extra space.
How Do I Know if My Trailer Bearings Need Grease?
There are several signs that your trailer wheel bearings may need greasing. The most obvious sign is excessive noise from the wheel bearing when driving, which indicates inadequate lubrication.
Other signs include the wheel bearing feeling hotter than usual when touched and a grinding sound coming from the bearing.
Or if there is visible damage to the seal or grease that has leaked out of it. Whenever you see any of these symptoms, check your wheel bearings and inspect them for signs of wear and tear before applying more grease.
How Often Should You Grease Trailer Bearings?
Generally, experts advise on greasing wheel bearings every 6 months or after covering a distance of around 5,000 miles.
However, if you use your trailer regularly and expose it to wet or dusty conditions, the frequency may need to be increased.
Furthermore, checking the wheel bearings each time you inspect your trailer’s brakes and hubs is always advisable, as this will indicate how much grease should be used.
A good practice is to clean the wheel bearing with a degreaser before applying more grease, as this will help remove any dirt or debris that may have built up.
Another good idea is to check the grease level in your trailer wheel bearings at least once a year. Doing that will help ensure that they are properly lubricated and functioning correctly.
If you notice any signs of inadequate lubrication, you should apply more grease before further damage occurs.
How To Grease Wheel Bearings on a Trailer
Greasing wheel bearings on a trailer is relatively straightforward, but there are some precautions you should take and special equipment needed. Before you begin, ensure the trailer is securely parked on level ground, the wheels choked, and the handbrake applied.
To grease your wheel bearings, remove shields or seals around the wheel bearing to expose the cavity. Then, using a grease gun, pump enough grease into the cavity until it reaches two-thirds or three-quarters full. Use thicker grease to fill the extra space if your wheel bearings are equipped with a double lip seal.
Once you have finished greasing your wheel bearings, replace any shields or seals and use a clean rag to remove any excess grease that may have spilled out.
What Are the Effects of Over-Greasing Bearings?
Over-greasing wheel bearings can cause problems, such as increased wear and tear on the bearing components, clogged seals, and leaks.
This may increase friction and produce more heat, which will reduce bearing life and cause damage to the wheel bearings due to dirt or dust accumulation.
In addition, over-greasing can also attract insects and other pests, further contaminating the wheel bearings.
Furthermore, if too much grease is used, it can cause the bearing to fail prematurely due to the pressure build-up from the grease. To keep your wheel bearings in good condition, check and re-grease them regularly but do not over-grease them.
Conclusion
In conclusion, using the right amount of grease when greasing your trailer wheel bearings is essential. Too little can lead to excessive noise and wear and tear on the bearing components, whereas too much grease can cause the bearing to fail prematurely due to pressure build-up.
The general rule of thumb is to check your trailer wheel bearings every 6 months or 5,000 miles and to apply more grease if necessary.
It is also essential to clean the wheel bearing with a degreaser before applying more grease and to wipe away any excess grease that may have spilled out.
Following these guidelines will help ensure your trailer wheel bearings are properly lubricated and functioning correctly.
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I am passionate about all things automotive and have a deep understanding of the topic. As a mechanic, I use my free time to share knowledge of everyday challenges that any car owner can experience – helping you make informed decisions about tires.