Seasonal preparation
Seasonal truck & fleet prep: before summer, before winter
The seasonal work that saves a breakdown is the work booked before the season turns, not after the first hot week or the first cold snap. Here's what to put on the schedule and when.
Every fleet manager knows the pattern: everyone books at once when the season turns, and a truck waiting on a part or a bay in the middle of that rush is the expensive outcome. Booking seasonal work early is a scheduling decision, not a mechanical one — the fix is usually straightforward if it's caught with time to spare.
Before summer: A/C and cooling
Cab air conditioning and engine cooling systems sit unused for months over winter, and the first hot week is when a slow leak or a weak charge finally shows itself — right when every other fleet is calling for the same service.
- A/C performance check. Refrigerant charge, compressor operation and a leak check before the heat arrives, not during it — see heavy-duty air conditioning service for what's involved.
- Cooling system inspection. Hoses, coolant condition and the radiator itself — a marginal cooling system that got through winter fine is exactly what struggles under summer load.
- Tire condition. Heat accelerates a tire that's already marginal — worth a look at the same visit.
Before winter: starting, charging and cold-weather readiness
Cold is what finds a weak battery, a marginal charging system or a DPF that was already regenerating more than it should. None of that is a surprise if it's checked before the temperature drops.
- Starting and charging. Battery condition, alternator output and connections — the system that gets tested every single cold morning. Covered under electrical diagnostics if something's already marginal.
- Fuel and emissions system. Cold weather is when fuel filters and a loading DPF cause the most trouble — see DPF & emissions if a unit's been regenerating more often than it should.
- Block heaters and glow plugs. Confirm they're actually working before the first cold snap, not the morning after it.
- Brakes, suspension and steering. Winter driving conditions punish worn components faster — a brake and suspension check before the snow is standard practice, not an extra.
When to book it
As a rule: A/C and cooling work goes on the schedule in spring, before the first hot week; starting, charging and cold-weather work goes on the schedule in fall, before the first hard frost. Fleets that book on that rhythm get seen on their schedule. Fleets that wait get seen on ours — whenever there's a bay open.
A fleet maintenance program puts seasonal work on the calendar automatically, so it's never a scramble. Get in touch to build the schedule around your units.