Purpose of Grease Caps and How to Measure to Get Correct Size
Updated 04/26/2010 | Published 04/20/2010
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Question:
The grease caps have fallen off of my 2005 Fleetwood Niagra Pop up camper trailer, after a recent repair at the shop. They insisted that they were just for looks and did not need replacing. What is their purpose and do I need to replace the caps? If so, then what size do I need to order.
asked by: Karen R
Expert Reply:
The purpose of the grease cap is to protect the bearing and the axle from any dirt getting into the bearing, which would then damage the bearing, hub and axle. So it is a good idea to have caps on your axle.
To get the correct size cap you would need to measure the inside diameter of the cap mounting surface on your hub. Then that measurement would match up to the cap size outside diameter. The sizes of caps only vary by a small amount so the measurement has to very accurate. Some of the most common sizes are 1.98 inch, 2.44 inch and 2.72.
Product Page this Question was Asked From
Grease Cap - 1.988" Outer Diameter - Drive In
- Trailer Bearings Races Seals Caps
- Caps
- Standard Grease Cap
- 1.99 Inch O.D.
- 1.99 Inch
- 2000 lbs Axle
- 2200 lbs Axle
- 2500 lbs Axle
- 3000 lbs Axle
- 3500 lbs Axle
- TruRyde
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