Caravan Wheel Bearing Maintenance: The Complete DIY and Servicing Guide

Everything riding in your caravan sits on eight steel parts per axle, each small enough to fit in your palm. Two tapered roller bearings per hub, spinning on a stationary spindle, carrying a couple of tonnes at 100 km/h in 40-degree heat. When they're greased and adjusted properly, they'll do that for years. When they're not, they fail quietly, and on a tandem-axle van you won't hear a thing from the driver's seat until the damage is done.

This guide covers caravan wheel bearing maintenance from end to end: how the hub assembly works, how to identify which bearings your van runs, the full step-by-step repack procedure, how to set preload properly, when a bearing must be replaced rather than regreased, what a professional service costs in Australia, and how to keep an eye on bearing health between services. It's written for Australian vans with serviceable tapered bearings, which is most of them.

None of this is beyond a home mechanic with basic tools and a free afternoon. It does need to be done right, though. A bearing that's slightly too tight cooks itself. One that's slightly too loose hammers itself apart and takes the brake geometry with it. The difference between the two is about a quarter turn of one nut, so we'll spend proper time on that step.

How caravan wheel bearings work

A caravan hub runs two tapered roller bearings, an inner and an outer, each made of two parts: a cup (the outer race, pressed into the hub) and a cone that carries the tapered rollers. The inner bearing is the one closest to the centre of the van; the outer sits near the dust cap. Between them, they let the hub and wheel spin freely on a fixed steel spindle while carrying the van's weight.

The easiest way to picture the assembly is the order it comes apart. Prise off the dust cap and you'll find a split pin, then a castellated nut and washer on the end of the spindle. Behind those sits the outer bearing, then the hub or brake drum itself. The inner bearing lives at the back of the hub, held in place by a grease seal that keeps grease in and water and dust out.

Two rules follow from this design. First, cups and cones wear together as a pair, so bearings are always replaced as a matched set. Fitting a new cone into an old cup halves the job and keeps the old wear pattern. AL-KO Australia, which builds a large share of the axles under Australian vans, makes exactly this point in its manuals. Second, the grease seal and split pin are single-use parts. Every teardown ends with a new seal and a new pin, even if the bearings go back in.

One exception before we go further. If your van was imported from Europe on AL-KO Euro axles, its hubs run sealed-for-life bearings that aren't user-serviceable, per the AL-KO caravan chassis handbook. This guide is for the conventional serviceable tapered bearings fitted to Australian-built vans and camper trailers.

Which bearings does your caravan have?

Australian caravans and trailers overwhelmingly run one of three bearing setups, known in the trade as Holden, Ford and parallel. The names date back to the axle standards of old Holden and Ford passenger cars and have outlived both.

A few notes on reading that table. You'll sometimes see the Holden inner cone listed as LM67049 rather than LM67048; both numbers circulate in the Australian market, so trust the code engraved on your own cone over any list. The Ford inner cup comes in two versions (L68110 and L68111) with different outside diameters to suit different hub bores, which is why you match the cup to the hub, not to a catalogue. And "parallel" describes the spindle, not the bearing: a parallel axle has no stepped-down outer journal, so it runs the same larger bearing at both positions. That's why CaravansPlus describes parallel setups as the stronger option for off-road use.

Identifying yours takes two minutes. Pull a dust cap and read the number engraved on the outer bearing cone. If it's unreadable, measure the spindle shoulders with a vernier caliper: Holden spindles step from 31.75 mm at the inner seat to 19.05 mm at the outer, Ford spindles from 35 mm to 22 mm.

Quality matters more with bearings than with most trailer parts. AL-KO sells its premium kits specifically as Japanese bearings (Koyo, NTN or NSK depending on supply), and that's not marketing fluff. One owner on the Caravaners Forum reported unbranded cups badly pitted after just 7,000 km. That's a single anecdote, not a study, but it matches the general trade view: the $15 no-name kit and the $50 Japanese kit are not the same part. On something that keeps your wheel attached, buy the good one.

How often should you service caravan wheel bearings?

The baseline for Australian conditions is every 12 months or 10,000 km, whichever comes first, and every serviceable van should meet at least that. Some manufacturers run tighter. Cruisemaster's maintenance bulletin CIS-012 calls for bearings to be dismantled, inspected and regreased every 6 months or 10,000 km on its suspension systems, plus a play check at the first 1,000 km on a new van. RACQ's advice is a service at least every 12 months, and more often for vans that go off-road, onto sand, or through water.

Conditions move the interval more than the calendar does:

Two extra rules sit on top of the schedule. AL-KO's manuals require the bearings to be checked and adjusted every time the hub comes off for any reason, brakes included. And any suspect symptom (noise, heat, play) overrides the schedule immediately.

We've published a detailed breakdown of these intervals, including what corrugations and beach work actually do to the numbers, in our guide to how often to service caravan wheel bearings.

Warning signs between services

A caravan bearing usually telegraphs trouble before it fails, just not loudly. The signs worth acting on: grinding, rumbling or clicking from a wheel; play when you jack the wheel and rock it top and bottom; a hub noticeably hotter than its partner on the same axle after a run; grease streaks flung across the inside of the rim (a failed seal); uneven tyre wear on one position; or the van pulling under brakes.

Two quick checks cost nothing at a rest stop. Spin each caravan wheel by hand when it's jacked for any reason and listen for roughness. And lay the back of your hand near each hub after towing: warm is normal, painful to touch is not. Where those checks sit in a full diagnostic sequence, and what each symptom usually means, is its own topic, but the short version is that any one of these signs earns a teardown and inspection before the next long tow.

Tools, parts and the right grease

A bearing service needs no specialist workshop gear. The full list: a jack and rated jack stands, wheel chocks, a wheel brace and torque wrench, multigrips or a hammer and flat screwdriver for the dust cap, pliers for the split pin, a drift or block of hardwood for seating the new seal, kerosene or degreaser and a container for cleaning, disposable gloves, rags, and fresh high-temperature bearing grease. A bearing packing tool is a nice-to-have; hands work fine. If the van has electric brakes, add a brake spoon or wide flat screwdriver for the adjuster.

Parts are cheap insurance. Superior Trailer Parts' 2025 cost breakdown puts standard bearing kits at $30 to $60 per wheel, with grease and split pins adding $15 to $25 across the job. Every service consumes a new grease seal per hub and a new split pin per spindle regardless of whether the bearings themselves go back in.

Grease deserves more attention than it usually gets. What you want is a lithium complex grease in NLGI 2 consistency rated for wheel bearing duty. Cruisemaster names Castrol LMX or equivalent in its service bulletin, and the Castrol data sheet shows why it suits the job: a 260°C dropping point and an operating range built for hubs that run hot under braking.

The rule most DIYers don't know: never mix grease families. Grease compatibility depends on the thickener, not the NLGI number, and lithium complex and calcium sulfonate greases are a documented incompatible pair, per Eaton's compatibility bulletin. Mixed greases can soften and let the base oil separate from the thickener, which quietly starves the bearing. If you don't know what's in the hub, or you're switching to a different grease type, clean everything back to bare metal and start fresh. That's also why boat trailer hubs, which typically run calcium-sulfonate marine grease behind purpose-made marine seals, should never just get a top-up of whatever cartridge is in the gun.

How to repack caravan wheel bearings step by step

Safety first, because this job puts you next to a raised van. The ACCC's vehicle jacks guidance is blunt: a jack is for lifting, stands are for holding, and no part of your body goes near the underside of anything supported only by a jack. Work on firm level ground, chock the wheels staying on the ground, and lower the van onto rated stands before you touch a hub. The corner steadies and jockey wheel are stabilisers, not lifting points. If the van has electric brakes, disconnect the trailer plug so nothing can energise the magnets while you work.

Then, one hub at a time:

1. Chock the opposite side, crack the wheel nuts, jack the van at the manufacturer's jacking point and set it on a stand. Remove the wheel.
2. Prise off the dust cap with multigrips or a screwdriver worked around its rim.
3. Straighten the split pin with pliers and pull it out. Bin it.
4. Remove the castellated nut and thrust washer.
5. Rock the drum slightly and the outer bearing will present itself. Set it somewhere clean.
6. Slide the drum off the spindle. On electric-brake vans it may hang up on the shoes; back the brake adjuster off through the slot in the backing plate until the drum clears.
7. From the back of the drum, lever out the grease seal and lift out the inner bearing. The seal is scrap; the bearing might not be.
8. Wash both bearings, the nut, the washer and the drum centre in kerosene or degreaser until every trace of old grease is gone. Old grease hides the evidence you're about to inspect for.
9. Dry the bearings completely and inspect them under good light, rollers and cups both. What you're looking for is covered in the next section. Any doubt, replace as a set.
10. Wipe the spindle clean and check it for scoring or bluing while you're there.
11. Pack each bearing by pressing grease into the wide end of the cage until it extrudes clean between the rollers on the far side, working around the full circumference. Gloves on; this is the messy part. A packing tool does the same job faster.
12. Smear a film of grease on the cups and the spindle, seat the inner bearing in the back of the drum, and tap the new seal in flush using a hardwood block so it goes in square.
13. Slide the drum onto the spindle, fit the outer bearing and thrust washer, and start the castellated nut by hand.
14. Set the bearing preload as described below. This is the step that decides whether the job was a success.
15. Fit a new split pin with the closed end seated in the nut's groove and one leg bent back over the spindle end, then tap the dust cap home around its edge.

Setting the preload

Preload is the tension the castellated nut puts on the bearings, and both directions of error are expensive. AL-KO's electric braked axles manual documents the method: turn the hub slowly to seat the bearings while tightening the nut until firm, then loosen the nut and re-tighten it by hand only, finger-tight, to the first notch that lines up with the hole in the spindle, and fit the split pin. Spinning the drum while you snug the nut works the grease through and lets the bearings seat properly; the final setting is deliberately done without a wrench.

The result should pass two checks. The drum spins freely for a couple of rotations before slowing to a stop. And with the wheel refitted on a couple of nuts, rocking it top and bottom gives a barely perceptible amount of play. RV Daily's service guide puts it plainly: no play at all means the nut is too tight, obvious rocking means too loose. That trace of play is by design. Timken, whose part numbers these bearings carry, specifies functioning end play of 0.025 to 0.127 mm for manually adjusted wheel bearings. You can't measure that without a dial indicator, but it explains why "fractionally loose" is correct and "firm with a wrench" is a cooked bearing waiting to happen.

Cruisemaster adds a useful field check for later: with the wheel jacked at the suspension arm's jacking point, excessive end play announces itself as an audible knock when you rock the wheel.

Torque the wheels, then check them again

Refit the wheel and torque the nuts to your axle or wheel manufacturer's specification. The figures printed in Australian caravan magazine guides sit around 125 to 130 Nm for common caravan studs, but the sticker on your van or the axle manual wins any argument. Then re-check the torque after the first 50 km of towing, and again at the intervals your manufacturer specifies; staged checks out to 1,000 km are common (Australian Off Road, for one, specifies 100, 300 and 1,000 km). Wheels loosened after a service are a solved problem, but only if you do the re-check.

Repack or replace? Reading the evidence

Cleaned and dried bearings tell you exactly what to do next, and the decision rule is simple: a bearing only goes back in if it looks close to new. Timken's trailer bearing guidance is the reference here. Replace the set if you find any of the following, on rollers or cups:

• Pitting: small craters in the running surface
• Spalling: metal flaking or chipping off the surface
• Heat discolouration: any blue or black tint means the bearing has run dangerously hot; it is scrap
• Rust, corrosion or water etching: grey-black staining left by moisture
• Rough spots you can feel when rotating the cone slowly in your hand
• Grease that came out contaminated: milky (water) or glittering (metal)

Three related calls while everything is apart. If a cup has spun loose in its hub bore, the hub itself is done; replacement hubs are cheap and come with new cups fitted. If the spindle shows scoring or bluing, the problem is above your pay grade and the axle needs professional attention before the van tows again. And check each wheel stud for movement; a loose stud needs professional attention, not a tighten.

The matched-set rule bears repeating because it's the most common shortcut: cups and cones are replaced together, always. New cones in worn cups inherit the old failure. And whatever you decide about the bearings, the seal and split pin are new, every time.

While the drum is off: give the brakes ten minutes

A bearing service on an electric-braked van is also your best look at the brakes all year, and skipping that look wastes the teardown. With the drum in your hands, check the friction surface for scoring and heat marks. Check the shoes for wear and cracking. Then look hard at the magnet face: a worn magnet shows friction material gone to the metal housing or exposed copper coil, and the armature surface inside the drum backs up the story with blue spots or grooves if things have been running hot, as the trailer brake specialists at BlackSeries document. A magnet in that state gets replaced, not watched.

RV Daily's workshop guide includes a live test worth doing at reassembly: have a helper apply the brake controller with the drum off and the plug connected, and confirm each magnet energises (it will grab something steel). It's a ten-second check that catches dead wiring you'd otherwise discover on a descent.

After the drum goes back on and preload is set, adjust the brakes: spin the drum forwards while tightening the star-wheel adjuster until the shoes bite, then back it off until only a light scrape remains. Adjust while spinning forwards only; spinning backwards can trip the auto-reverse mechanism in some drum designs. Cruisemaster publishes its own electric brake bulletin (CIS-001) if you want the manufacturer version of this procedure.

What does a caravan wheel bearing service cost in Australia?

DIY is cheap, professional is reasonable, and a roadside failure costs more than a decade of either. Current Australian pricing, from published sources rather than guesswork:

Which way to go? If you're mechanically handy, the repack is a satisfying afternoon job and you'll know it was done properly. That said, there are two honest reasons to pay a professional. Preload is technique-sensitive, and a workshop does fifty of these a year. And if your van is under warranty, read the terms first: some manufacturers require servicing through authorised agents to keep extended warranties intact, even while listing bearing greasing among normal owner maintenance. Australian Off Road's service terms are an example worth reading before you pick up a spanner on a newer van.

Either way, the money conversation ends the same place: South Australia's RAA attended 1,363 caravan flat-tyre callouts between January 2020 and March 2025, and 65% of them were in country areas. Running-gear trouble on a caravan has a habit of happening a long way from the nearest workshop, which is the strongest argument for maintenance on schedule rather than repair on failure.

Between services: watch the temperature

Every interval in this guide shares one weakness: a bearing can start failing the week after a perfect service. Grit past a seal on one beach trip, a nick from a water crossing, a cup that spun slightly. The failure mechanism is thermal, and it's well documented in trailer industry guidance from TrailerWatchdog and BlackSeries: a failing bearing generates abnormal heat well before it makes noise, normal hub temperatures sit roughly between 38°C and 66°C, the band from about 66°C to 93°C is a warning zone, and beyond roughly 93°C grease thins enough to escape the seal, after which failure is a matter of distance, not luck. Just as telling is the comparison across an axle: hubs doing the same job should run within about 11 to 14°C of each other, so one hub running hotter than its partner is a fault report, not a quirk.

The traditional answer is the fuel-stop hand check, and it's a habit worth having: walk the van, hold the back of your hand near each hub, and investigate anything too hot to touch. Its limits are real, though. You only sample the temperature when you happen to stop, a hot brake drum sits millimetres from the hub and muddies the reading, and by the time a hub is painful to touch you're already into the warning zone. Mind your knuckles on a hot one.

There's a strong engineering precedent for doing this continuously instead. Railways have run trackside bearing-temperature detectors for decades, and peer-reviewed work from the University of Texas RGV rail safety group found that temperature trending plays a major role in preventing bearing-caused derailments, while also showing that intermittent spot measurements can under-read true bearing temperature by up to 47°C. Continuous beats occasional, in other words, and that logic scales down to a caravan axle.

That's the gap our wheel bearing temperature sensors close. They mount on the hub itself, read bearing temperature continuously, and display it on the same iCheckTPMS monitor as your tyre pressures, with packs for single axles (2 sensors, from $178) and tandems (4 sensors). No other TPMS brand on the Australian market offers integrated hub-mounted bearing temperature monitoring, which is why we keep writing about bearings: it's the failure mode we're equipped to catch. The full story of what an overheating bearing can do, including the fire risk, is in our article on how temperature monitoring prevents wheel bearing fires.

Touring spares: what to carry in the outback

A bearing kit in the glovebox turns a trip-ending failure into a two-hour delay. For remote touring, carry per hub type: one complete bearing kit (cones and cups), pre-greased and sealed in a zip-lock bag or container so it's ready to fit; two grease seals; split pins; a tube or small tub of the same grease that's in your hubs (same product, not just same type, given the compatibility rule); a spare dust cap, which is the part most often mangled on removal; and the tools from the list above, particularly the drift and pliers. A cheap infrared thermometer earns its spot too, both for trend checks at stops and for confirming a suspect hub before you strip it on the side of the track.

If you've fitted bearing temperature sensors, the spares kit doesn't become redundant. It becomes the response plan for the alert you'll now actually receive in time.

Caravan wheel bearing maintenance FAQ

How often should caravan wheel bearings be serviced?

Every 12 months or 10,000 km, whichever comes first, for a van in normal highway use. Cruisemaster specifies 6 months or 10,000 km for its systems, and hard use shortens everything: regular corrugations or heavy loads halve the interval, and beach trips, salt exposure or deep water crossings warrant an inspection soon after the trip rather than waiting for the schedule.

How much does a caravan wheel bearing service cost in Australia?

Around $75 to $145 per axle in parts if you do it yourself. A professional bearing and brake service runs about $200 for a single-axle van and $300 for a tandem, mobile specialists start around $180, and bearing replacement labour at a workshop runs $150 to $300 per axle. A roadside failure starts at about $250 for the call-out plus $400 or more for towing, before any repair.

How do I know if my caravan wheel bearings need attention?

The signs that matter: grinding or rumbling from a wheel, play when the jacked wheel is rocked top and bottom, one hub running noticeably hotter than its partner on the same axle, grease flung across the inside of a rim, uneven tyre wear on one position, or the van pulling under brakes. Any one of them justifies a teardown and inspection before the next long tow.

Can I keep towing on a suspect wheel bearing?

No. A bearing that is noisy, hot or loose can deteriorate quickly, and the end state is a seized hub or a separated wheel at highway speed. Stop, check the hub temperature and wheel play, and have the bearing inspected before towing on. The cost gap between an early repack and a roadside failure is enormous.

What grease should I use for caravan wheel bearings?

A lithium complex wheel bearing grease in NLGI 2 consistency. Cruisemaster names Castrol LMX or equivalent, which has a 260°C dropping point. Never mix grease families: lithium complex and calcium sulfonate greases are incompatible, and a mixed hub should be cleaned out and repacked fresh. Boat trailers are a special case and run marine grease behind marine seals.

Should I repack my bearings or replace them?

Repack only if the cleaned bearing looks close to new. Any pitting, spalling, blue or black heat discolouration, rust staining, rough spots, or contaminated grease (milky or glittering) means the bearing is replaced as a matched set, cup and cone together. Seals and split pins are replaced at every service regardless.

How do I know if I have Holden or Ford bearings?

Read the number engraved on the outer bearing cone. LM67048 or LM67049 inner with LM11949 outer is the Holden pattern; L68149 inner with LM12749 outer is Ford; L68149 at both positions means a parallel axle. If the code is unreadable, measure the spindle: Holden shoulders are 31.75 mm and 19.05 mm, Ford are 35 mm and 22 mm.

How hot should caravan wheel hubs get?

Trailer industry guidance puts normal hub temperature roughly between 38°C and 66°C, with 66°C to 93°C as a warning zone and anything above about 93°C as the danger zone where grease begins escaping the seal. The comparison across the axle matters as much as the number: hubs on the same axle should run within about 11 to 14°C of each other.

Do bearings need servicing after beach driving or water crossings?

Yes, sooner than the calendar says. Salt attacks the steel, fine sand grinds through grease, and a hot hub cooled suddenly in a water crossing can draw moisture past its own seal. After a beach trip or crossings above hub depth, inspect the bearings promptly rather than waiting for the scheduled service.

Can I service caravan wheel bearings myself?

Yes, with basic tools, jack stands, and care over two steps: cleanliness during packing and correct preload at reassembly. The nut is set finger-tight by AL-KO's documented method, never wrenched tight. If the van is under a warranty that requires authorised servicing, or you find spindle damage or a spun cup, hand the job to a professional.

The bearing habit worth keeping

Caravan wheel bearing maintenance comes down to a short list: know which bearings you run, service them every 12 months or 10,000 km (sooner for hard use), pack them with the right grease and nothing mixed, set the preload finger-tight to AL-KO's method with a new seal and pin every time, and replace bearings as matched sets at the first sign of damage. Give the brakes ten minutes while the drum is off, re-torque the wheels after 50 km, and carry a pre-greased spare kit anywhere remote.

Then close the gap the schedule can't cover. Whether that's a disciplined hand check at every stop or continuous hub temperature monitoring on the same display as your tyre pressures, the principle is identical: bearings warn you with heat before they fail, if something is listening. Our Australian caravan safety checklist covers where bearing checks sit in the wider pre-trip routine.

Safe travels, and may your hubs always run cool.