A caravan bearing does not usually fail without warning. It gives you a week of small signals first, and almost nobody checks for them, because the hub is the one part of the rig you never look at.
Then it lets go somewhere between two towns, on a Sunday, with the whole rig loaded for a month away. The difference between that trip and a good one is usually a two-hour job you could have done at home.
The short version: service caravan wheel bearings at least every 12 months or 10,000 km, whichever comes first. Feel your hubs by hand at every fuel stop and compare them side to side. A hub noticeably hotter than the others gets looked at before you drive on.
Why caravan bearings fail more often than you would expect
A caravan axle lives a harder life than the axle under your tow vehicle. It sits loaded and unmoving for months, then does a thousand kilometres in a week. The bearings are usually smaller than you would guess for the weight they carry, and they rarely get the same attention as the brakes or the tyres.
The other factor is water. Any caravan that has been through a creek crossing, a flooded causeway or a boat ramp has likely taken water past a seal, and water in a bearing is the beginning of the end regardless of how much grease sits around it.
The service interval that actually matters
Most manufacturer and service guidance lands in the same place: repack and inspect at least every 12 months or 10,000 km, whichever comes first, and sooner if the van has been through water or sat unused for a long period.
That second condition catches people out. A van that has done 3,000 km in a year but has been parked near the coast for eight months is not a low-risk case. Grease can dry, and condensation inside a hub does its own quiet damage.
If you are about to do a big remote trip, treat the bearing service as part of the preparation rather than something to sort out next year. A failure a thousand kilometres from the nearest workshop costs far more than the service does, and if you bought the van second-hand with no receipt for a bearing service, assume it has not been done.
The pre-summer check, in order
Do this before the hot weather arrives, not during it. Spring is the right window: the van has been sitting, the summer trips are ahead, and a workshop can still fit you in.
Work through it in this order so you are not chasing your tail, and do one wheel at a time so a half-finished job never becomes a rolling one.
Hubs, bearings and seals
With the wheel off, pull the hub and look at the bearing races properly. You are looking for scoring, pitting or any sign that the metal has been running hot or contaminated. A race that looks polished and even is healthy; one with dark patches or a dull, rough appearance is done.
Check the grease as well as the bearings. Fresh grease is smooth and translucent. Grease that has gone grey, gritty or watery has been doing its job badly for a while, and the bearings under it will show it.
Replace seals every time you repack. A seal is a cheap part and a reused one leaks, which puts you back where you started. On a boat trailer, this is not optional.
Suspension, shackles and U-bolts
While the van is jacked, look along the springs for a broken or flattened leaf, and check the shackle pins and bushes for movement or oval-shaped holes. Wear here shows up as a van that sits unevenly or wanders under braking.
Check the U-bolts that clamp the axle to the springs. They should be evenly tight. Loose U-bolts let the axle shift, which changes your alignment and chews tyres in a way people usually blame on the tyres.
Cracks usually start at the hanger welds, so look there while you are underneath. A crack you find in the driveway is a much better outcome than one you find at speed.
The bits people forget
Check your corner steadies and their mounts, because a steady leg that drops while you are travelling is its own kind of excitement. Check the breakaway system and its battery, since that is the one piece of safety equipment that only matters when everything else has already gone wrong.
If your van runs a weight distribution hitch, check the bars and the wear points while you are there. Finally, check the tyres for age as well as tread. Pressures and tread get all the attention, but a tyre that is seven years old is a liability regardless of how much rubber is left on it.
Workshop or driveway?
Repacking bearings is not difficult work, but it is messy, it needs a torque wrench and a proper jack, and it needs you to care about the result. If any of those are missing, book it in.
A caravan service that includes bearings, brakes and a suspension inspection is a routine booking at most regional workshops. Ask specifically what is included, because a general service does not always cover the bearings.
What a workshop actually does
A proper bearing service removes the hub, cleans and inspects the bearings and races, replaces the seals, repacks with fresh grease, sets the bearing preload correctly and torques the wheel nuts to spec.
The preload setting is the part worth paying for. Too loose and the wheel moves on the stub axle; too tight and the bearing overheats. Both failures look fine in the driveway and show up on the highway.
What you can do yourself
Even if you never touch a bearing, you can do the checks that catch problems early. Feel the hubs at every stop on a long drive and compare them side to side. Any hub noticeably hotter than its opposite number goes on the list.
Run a hand over each tyre sidewall for bulges, and check pressures cold rather than after a highway run.
Real-world tips from the road
- Feel your hubs at every fuel stop, and do it with a bare hand rather than a glove. Warm is normal. Hot enough to pull your hand away is not.
- Compare hubs side to side, not against a memory. The left hub matching the right one tells you more than any absolute number.
- Carry a spare set of bearings, seals and a tub of grease if you are heading properly remote. They weigh almost nothing and turn a trip-ending failure into an afternoon.
- After any water crossing deep enough to reach the hubs, plan a bearing service rather than hoping. Water ingress does not announce itself.
- Do the job in spring. Workshops book out solid once the summer holidays start.
While you are under the van, the 12V side is worth a look too. A charger with a built-in voltmeter is a simple way to keep an eye on your charging circuit and battery condition during pre-trip checks, and our 12V accessories range covers that part of the setup.
None of this is glamorous work, and that is exactly why it gets skipped. A bearing service costs you an afternoon in the driveway or a booking at a workshop, and it removes the single most common way a caravan holiday turns into a roadside wait. If you have a servicing routine that has worked for you, share it in the comments.
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