From 1.7 t to 800 t
We work on air conditioning across the whole range of machines. That means mini excavators, skid steers, rollers, loaders, dozers and haul trucks, plus the trucks that move them between sites.
Big or small, the system has the same core parts: compressor, condenser, evaporator, receiver drier and expansion (TX) valve. What changes is access, the size of the charge and how hard the machine works. Have a look at the machines we've worked on.
Why a flush matters after a compressor failure
When a compressor fails internally, it can shed metal particles and burnt oil through the system. That debris settles in the condenser, hoses and evaporator, waiting for the next compressor.
Bolt in a new compressor without cleaning it out and the debris gets drawn straight back in. It can block the TX valve and wear out the new compressor early, and you end up paying for the same repair twice.
So we flush what can be flushed and replace what can't, including the receiver drier. Some condensers have passages too fine to flush clean, so they get replaced too. You'll know which parts need replacing, and why, before we start.
Dust, vibration and Hunter heat
Earthmoving air conditioning takes a beating on Hunter sites. Coal and quarry dust packs into condenser fins, so the system struggles to shed heat right when the afternoon is hottest. Dust also clogs cab filters and cuts the airflow at the vents.
Vibration does the rest. Rough haul roads and long shifts loosen fittings, rub hoses through on brackets and crack mounts, and plenty of machinery leaks start exactly that way.
When we fix a fault, we look for what caused it, whether that's a hose rubbing on a bracket or a condenser that needs cleaning more often. There's more on this in dust, vibration and machinery AC.
Leaks found before anything comes apart
Some leaks are easy to spot. Others are buried in an evaporator behind the dash, or in a fitting you can't reach without pulling panels off.
We confirm where the leak is before anything gets stripped, so you're not paying for a cab to come apart on a guess. If it can't be pinned down straight away, we'll tell you what it will take to find it.
On site across the Hunter, weekends included
We do truck air conditioning repairs and machinery AC work where the machine is. That might be a depot in Newcastle, a quarry on the Central Coast or a mine site in the Hunter Valley. Weekend breakdown call-outs are available by arrangement.
Machine AC faults are often electrical, like a blower motor that's given up, a fan relay or wiring rubbed through by vibration. We do auto electrical work as well, so one call covers both halves of the fault.