Winterizing your pulling rig for the Australian off-season

Pulling season across Australia rolls along through the warmer months, peaking from November to March at regional shows around places like Tamworth, Toowoomba and the NSW mid-west. Once the last sled run is made and the trophies handed out, owners face the question of how to keep their modified trucks and tractors safe through the cooler, damper months when most pullers are parked up. A careful off-season routine protects expensive driveline components, prevents corrosion, and means you are not chasing electrical gremlins when the next call for entries drops.

The word "winter" in Australia does not always mean snow and ice, but the southern half of the country still deals with cold nights, persistent rain, and condensation that does real damage to bare steel and electronic modules. In Victoria, Tasmania and parts of South Australia, frosty mornings are routine from May to September, and humidity swings encourage condensation inside fuel tanks and differentials. Even in Brisbane or Perth, where winters are mild, the long lay-up invites rodent damage, salt-laden coastal breezes, and stale diesel that gums up injectors.

Australian-built and Australian-delivered rigs also bring a few quirks worth factoring in. Many older pullers are based on right-hand-drive Ford Falcon and Holden Commodore utes, while imports from the US sit alongside home-modified Toyota Land Cruisers and Japanese farm tractors. Diesel specs differ from the American supply chain too, with most bowser fuel meeting local standards rather than the ultra-low-sulphur diesel formulated for North American on-road engines. Knowing what is in the tank before you park it up saves headaches when the first warm-up comes around.

A good winterising pass is less about spraying penetrating oil on every bolt and more about working through a checklist that mirrors the way professional teams store their competition vehicles between rounds. The steps below are written for Australian conditions, draw on the experience of pullers who campaign trucks and tractors around regional circuits, and are tailored for owners who would recognise the tips shared in the interview with a veteran puller that ran on the association's news feed last season.

Clean before you cover it

A thorough wash is the starting point for any rig going into storage, and in Australia that means paying extra attention to underbody grime. Clay and loam from regional showgrounds in the Riverina and the Darling Downs hold moisture against steel and pit ferrous parts in ways that suburban driveway mud never does. Pressure-wash the chassis rails, axle housings, and the inside of wheel arches, then let everything dry fully in the sun before the rig goes under cover.

Once the bulk dirt is off, go over the body and panels with a wax-safe degreaser to strip leftover bug splatter, hydraulic fluid and exhaust soot. For fibreglass pulling tractor bodies, a light polish with a non-abrasive product keeps the gelcoat from hazing under months of cover. Bare steel parts such as roll cages, weight brackets, and hand-fabricated bumpers benefit from a wipe-down with a light oil or lanolin spray to displace any moisture still clinging after washing.

Open the engine bay and blow out leaves, grass clippings and the fine red dust that finds its way into every gap from places like the Goulburn Valley or the Hunter Valley. Pay particular attention to the radiator fins and the air intake pre-cleaner, both of which can clog quickly when a tractor has been working in chaff and stubble. A clean machine going into storage is far easier to inspect, and any oil seep that develops over winter will be obvious against a tidy engine bay rather than hidden under a layer of dust.

Fluids, fuels and filters

Changing the engine oil and filter before long-term storage is one of the cheapest forms of insurance on offer. Used oil carries combustion by-products, moisture and metallic wear particles that can etch bearing surfaces when the engine sits idle. In Australian conditions, where summer pull rounds run back-to-back and engines work hard in hot dust, the oil at season's end is often well past its useful life. A fresh fill protects internals through the lay-up and means the first start-up next year is already running on clean lubricant.

Coolant deserves the same attention, especially in regions where overnight temperatures drop near zero for weeks at a time. A proper mix of ethylene glycol-based coolant and clean water protects aluminium heads and cylinder liners from freeze damage and corrosion. Top up any low coolant levels, check hoses for soft spots, and confirm the radiator cap seal is sound. For diesel pullers, this is also a sensible moment to drain the water-in-fuel trap and check for any algae growth in the tank, a common issue when fuel sits for months in warm coastal sheds.

Diesel fuel itself is one of the biggest winterising headaches for Australian pullers. Local diesel blends vary in cetane rating and biodiesel content, and untreated fuel can oxidise, drop out of suspension, and leave varnish on injectors over a long lay-up. Either fill the tank completely to limit condensation or run it down low and add a quality biocide and stabiliser. Petrol pullers based on Holden or Ford engines should run a bottle of fuel stabiliser through the system before the last drive, letting the treated fuel reach the carburettor or injectors. New fuel and air filters complete the fluid service and remove another layer of uncertainty.

Mechanical and electrical care

Once the fluids are sorted, work through the mechanical items that suffer from sitting still. Rodent damage is a genuine problem in Australian sheds, particularly in rural areas around towns like Wagga Wagga, Mudgee and the Adelaide Hills, where mice and rats find warm engine bays irresistible. Block off air intakes with steel mesh or purpose-made covers, stuff the exhaust pipe with a rag (remembering to remove it before start-up), and lay fresh bait or traps in the storage area. A chewed wiring loom can cost a weekend of pulling time and several hundred dollars to repair.

For mechanical components, move the machine gently forward and back by a metre or so every few weeks if you can, or at least rotate the driveshaft and wheels by hand before covering. This keeps bearings, seals and gearbox synchros bathed in oil and stops flat spots developing on tyres that have been carrying weight in one spot for too long. On tractors fitted with hydraulic linkage and three-point hitches, cycle the remotes and raise and lower the arms a few times to refresh the fluid film on cylinders and spool valves.

Electrical care is often overlooked until the first crank of the new season reveals a flat battery and corroded terminals. Remove the battery if the rig will be stored longer than six weeks, store it on a trickle charger or bring it indoors where temperature swings are smaller, and clean the posts before reinstalling. Check alternator belts for cracking and adjust tension, examine all visible wiring for chafing, and disconnect any aftermarket electronics such as shift lights, data loggers or PA systems that draw a slow parasitic load while the key is off.

Choosing and preparing the storage spot

Where you store the rig matters as much as how you store it. A fully enclosed shed is ideal, but many Australian pullers keep their machines in open-fronted barns, lean-tos, or shipping containers that breathe with the weather. Wherever the rig goes, the floor should be dry, level, and ideally raised above the surrounding ground. Concrete is best, but if the only option is a dirt floor, lay down heavy-duty plastic sheeting first to stop ground moisture wicking up into tyres and chassis components.

Coastal storage adds another layer of risk. Salt-laden air from places like the Mornington Peninsula, the Illawarra, or the suburbs around Fremantle accelerates corrosion on bare steel, chrome stacks and aluminium tanks. If the shed cannot be sealed, consider a breathable cover rather than a plastic tarp, which traps condensation and makes the corrosion problem worse. Desiccant bags or a small dehumidifier running occasionally help keep humidity below the level where rust takes hold on polished surfaces.

Pests are a constant in rural Australia, and not just rodents. Termites can chew through timber shelving and the fibre insulation on wiring looms, while wasps love to nest in the mouth of an open air intake over winter. A quick walk around the storage area before the rig goes in, sealing obvious entry points, and removing nearby food sources all reduce the chance of unwelcome guests setting up home. For tractors stored in shipping containers, vent the container on dry days to prevent the internal humidity from spiking and rusting tinwork from the inside out.

Off-season checklist worth pinning to the wall

A short, reliable checklist makes the job faster each year and keeps nothing important forgotten. The list below covers the essentials for a typical Australian puller heading into a winter lay-up.

• Wash and dry the rig thoroughly, then wipe bare steel with light oil or lanolin before parking up.
• Change engine oil and filter, top up coolant, and confirm the radiator cap holds pressure.
• Fill the fuel tank or treat the fuel with stabiliser and biocide, and replace fuel and air filters.
• Remove the battery for indoor storage on a trickle charger, and disconnect any parasitic electronics.
• Block the exhaust and air intake with mesh to keep rodents, wasps and termites out of the engine bay.
• Inflate tyres to a slightly higher pressure, chock the wheels, and cycle any hydraulics once a month.
• Log every job in a service notebook alongside membership and registration renewal dates.

When the cooler months pass and the pulling calendar starts filling up again, work through a measured wake-up routine rather than simply hitting the key. Check tyre pressures, top up any fluids that have settled, inspect for rodent damage, reconnect the battery, and crank the engine with the fuel system primed. For diesel tractors, bleed the injectors if the fuel system was drained. Run the engine up to operating temperature, cycle the hydraulics, and check for leaks before loading onto the trailer for the first event of the new season.

Schedules, class rules and registration packs for the coming season are usually posted well before the first hook, so it pays to keep tabs on the official OTTPA site over winter and lock in entries early, especially for popular regional rounds where spots fill fast. Pulling rewards preparation, and the work you do between events is what separates a trouble-free return to the scales from a long list of repairs in the shed.