Basic Horsebox Maintenance - Helpful hints and essential checks.
Basic horsebox maintenance is all too easily ignored but breaking down
on a small country lane or on the motorway in the pouring rain, with one
or more horses in a horsebox isn't anyone's idea of fun.

But, it can and does happen and whether you're only travelling to a local
show or halfway across the country, a simple breakdown can quickly turn
into a nightmare; especially when your horses are young, inexperienced
or don't travel well.
The next time you're organising your show schedule or busy checking your
horse or pony, give a thought to your horsebox maintenance.
Download and print our easy-to-follow
checklist for passing the UK MOT test and pin it up in your cab, in
the tack room or on your noticeboard at home.
It'll help keep your horsebox in good condition and you and your horse safe.
Always :
- Make sure your horsebox is serviced annually, including a thorough
check on the brakes.
- Power-wash the outside and underside regularly, especially after use.
- Make sure the box or trailer is taxed and insured and that the lights
and indicators are working correctly.
- If your lorry has a wooden floor, check it regularly for signs of
rotting - reports of floors giving way while horses are in transit are
not uncommon and can result in serious injury!
- Occasionally remove floor matting or bedding, power-wash inside and
allow to dry thoroughly before replacing.
- Regularly check the tyres for signs of wear and ensure that tyre pressures
are correct.
- Never use a single axle trailer to tow a horse
- Ensure the towing hitch is the correct height for the trailer and
that the trailer can be towed level, to prevent uneven tyre wear.
- Always carry a fully charged mobile phone with you - even on short
journeys. Make sure you carry the emergency helpline number for your
breakdown or recovery company, your vet and your insurance company.
- Make a date in your diary to check your horsebox or trailer every
month.
Your horsebox engine :
- Check all oils (including hydraulic oil).
- Check all water levels (including windscreen washer) and that you
have the correct concentration of coolant in your radiator for the weather
conditions.
- Add an anticoagulant additive to the diesel to prevent the fuel from
solidifying, particularly if extremely cold weather is forecast.
- Clean water/sediment traps regularly and ensure that the filter is
replaced.
- Change oil and fuel filters regularly,especially after high mileage
or a long winter break.
- Start up and leave the engine running for 5 minutes before driving
to allow the engine and pipes to warm up if a turbo charger is fitted.
After running the engine at high revs, allow it to tick over for a minute
or so before switching off to allow the turbo to cool.
- If your diesel engine overheats and loses coolant water, make sure
you replace the water slowly, while the engine is running.
- Check all pulley belts are in good working condition.
Air brakes
- Pressurise brakes and check for leaks with the engine switched off.
- Check that all self-drain valves are operating and drain any condensation
from the system.
- Warm-up your brakes by driving a short distance and applying the brakes
intermittently, as when cold your brakes can bite and cause your horse
discomfort.
- Ensure your brakes are adjusted correctly and regularly.
Lights
- Check all internal lights as well as external.
- Check all warning lights, the bulbs tend to blow easily.
- Fit loading and unloading lights, they're essential in winter.
- Unloading lights should clearly illuminate the ramp and the surrounding
area.
- Loading lights should illuminate the ramp and the interior of the
horsebox.
- Make sure the lights face away from your horse to avoid glare.
Tyres

- Always carry a useable spare.
- Ensure all your tyre pressures are correct.
- 16" and 17" tyres are becoming very difficult to replace
as stocks are diminishing. Get advice about replacing those tyres with
a more common 17.5" size, to avoid delays if you ever require roadside
assistance.
- Check tyre condition, particularly if your horsebox has been left
idle over the winter months, as they may have cracked on the rims as
well as reduced in pressure.
- When buying a horsebox ensure that cross-plys and radials are not
mixed on the same axle. Front tyres should always be new. Rear tyres
can be Precision Grade remoulds.
- Check the inside tyres on the rear axle(s) as they can perish or
go flat without being noticed.
Horseboxes over 3.5 tonnes should carry a spare tyre, without a spare
wheel, as roadside assistance will be required to change the wheel anyway.
Why a horsebox and not a trailer?
Every horse owner dreams of the day when they can arrive at the yard,
load up their horsey friend and toddle off to a local competition or to
some nice beach or woodland trail ride...
Keeping Your Horsebox in Good Condition
When Buying a horsebox, you have to consider several sizes to fit different numbers of horses. As well as different features and facilities to fit your purpose...