When was the last time you packed the bearings and replaced the axle seals on your trailer, or fifth wheel? 
If it has been a long time, or if you cannot recall chances are more likely than not they need to be serviced.  Maintenance on your trailer axles is important.  Frequently packing the bearings and replacing seals will increase the longevity of the moving parts while reducing friction, heat and wear through good lubrication.  Another important item to check while packing your bearings is to check your trailer brakes.  Your brake pad material will be exposed when you pull the drums off, and you will be able to tell whether your pads require replacement at that time.  So packing your bearings is both smart and safe!  Poulsbo RV offers this service at $149.95 + tax per axle.  Or if this is a job you feel like taking on yourself, call us for some helpful advice and we will sell you the right parts to get the job done!!  Contact us today!  Lastly, always support your trailer with the proper jack stands.  Do not rely on the jack to keep your trailer off the ground.  Work smart, and safe!!