Wheel bearings are one of those things you never think about until something goes wrong. And when caravan bearings fail, they fail dramatically. We’ve seen wheels come off on the highway, hubs welded to axles by heat, and holidays ruined before they started.
The good news is that bearing maintenance is simple, affordable, and prevents all of that.
What Do Wheel Bearings Do?
The bearings sit inside the wheel hub and allow the wheel to spin freely on the axle. They’re packed with grease that reduces friction and heat. Over time, the grease breaks down, dries out, or gets contaminated with water and dirt. When the grease fails, the bearings overheat and eventually seize.
How Often Should You Repack?
The general rule is:
- Every 10,000 km of towing, OR
- Once a year, whichever comes first
If your caravan sits for long periods, the grease can dry out even without use. Annual repacking is good insurance.
If you’ve driven through deep water (river crossings, flooded roads), repack the bearings as soon as possible. Water gets past the seals and washes the grease away.
Signs Your Bearings Need Attention
While Towing
- Grinding or humming noise from the wheels that gets louder with speed
- Vibration through the caravan or tow bar
- The caravan pulling to one side
During Inspection
- Play in the wheel. Grab the top and bottom of the tyre and rock it. Any movement means the bearings are loose or worn.
- Rough spinning. Jack up one wheel and spin it by hand. It should spin smoothly and quietly. Grinding, catching, or roughness means trouble.
- Heat after towing. Carefully touch the hub after a drive. Warm is normal. Too hot to touch means the bearings are failing. Never ignore a hot hub.
- Grease leaking from the hub. Dark, discoloured grease leaking around the dust cap means the seals are failing.
The Repacking Process
If you’re mechanically inclined, you can do this yourself. If not, any caravan service centre or mechanic can do it for you.
What You Need
- A jack and axle stands
- Wheel spanner
- Screwdriver or pliers (for dust cap and split pin)
- Fresh bearing grease (high-temperature wheel bearing grease)
- New split pins (never reuse old ones)
- New grease seals (recommended each time)
- Clean rags and degreaser
- A container for the old grease
The Steps (Overview)
- Jack up the caravan and remove the wheel
- Remove the dust cap from the centre of the hub
- Remove the split pin and castellated nut
- Slide the hub off the axle. The outer bearing will come with it. Catch it before it falls in the dirt.
- Remove the inner bearing and grease seal from the back of the hub
- Clean everything. Remove all old grease from the bearings, hub, and axle spindle using degreaser and rags
- Inspect the bearings. Look for pitting, scoring, discolouration, or flat spots on the rollers and races. If you see damage, replace them.
- Pack fresh grease into the bearings. Work the grease into the rollers by hand until it’s fully packed.
- Install the inner bearing and a new grease seal
- Slide the hub back onto the axle
- Install the outer bearing, washer, and castellated nut
- Adjust the nut. Tighten until snug, then back off slightly until the wheel spins freely with no play. Line up the castellated nut with the hole and insert a new split pin.
- Replace the dust cap and fill the hub with grease
- Refit the wheel and lower the caravan
What Does It Cost?
If you do it yourself: R100-R200 for grease and seals.
At a workshop: R300-R600 per side including parts and labour. New bearings (if needed) add R200-R500 per side.
It’s one of the cheapest maintenance jobs you can do, and one of the most important.
When to Replace Instead of Repack
If the bearings show any of these signs, replace them rather than just repacking:
- Pitting or scoring on the rollers
- Blue discolouration (means they overheated)
- Flat spots or rough surfaces
- The races are damaged or scored
Bearings are cheap. A new wheel hub assembly because you ignored worn bearings is not.
Need Your Bearings Done?
At Caravan Center in Vereeniging, we repack and replace caravan bearings as part of our servicing. Drop your caravan off and we’ll get it sorted while you wait.
Book a service at caravancenter.co.za/contact.
