Why a vague brief produces a machine that cannot do the job
Cab cleaning is a peculiar job inside vehicle cleaning. The exterior of a cab takes heat and pressure without complaint; the interior takes neither. Inside there is upholstery, a dashboard, wiring looms, HVAC ducts and vents, seat tracks, and a floor that carries grit and diesel film. Buyers send briefs that say "steam cleaner for truck cabs" and then discover the machine they bought is either too wet for the interior or too small for the yard outside. A useful equipment brief describes the working environment and the constraints in enough detail that a supplier can say no to part of it. The items below are what a supplier needs, in the order they usually decide the specification.
1. The work location, and what it supplies
- Where cabs are cleaned: a dedicated bay, a depot yard, a service station, or on the customer's site. This determines everything else.
- Power available at that position, and how far the cable would have to run across a live yard.
- Water at the point of work, and its fitting. Our published machines take tap water through a 4-point internal-tooth inlet — specified as 1/2 inch on the Fixed Steam Cleaning Machine PowerDe HW02 — so a mismatch has to be plumbed before the first shift, not negotiated on it.
- Where the runoff goes. In a yard this is often the item that stops a method being permitted at all.
If the wash point cannot supply power and water, the brief should say so explicitly, because the recommendation moves from a mains-fed machine to a self-contained mobile one.
2. Interior and exterior scoped as separate lines
- Interior scope: seats and trim, dashboard and switchgear, steering column, vents and air ducts, seat tracks, floor and footwells, storage compartments. Name the surfaces the crew is expected to clean, and name the exclusions — electrical connectors, instrument modules, airbag components.
- Exterior scope: cab panels, glass, wheels and arches, mirrors, chassis rails and fifth-wheel area, fuel-tank surround, steps and handrails.
- Engine-bay work, if in scope, as its own line: it requires heat with minimal moisture, and it must exclude wiring looms, alternators, ECU housings and air intakes.
For cab interiors, dry steam is the mode that works, because it delivers heat with comparatively little moisture; wet steam belongs on exterior deposits and the chassis. A machine that switches between modes on the same wand is the specification point that most often decides which model to buy.
3. Throughput and window, expressed as numbers
- Cabs per shift, and how many minutes per cab the operator can afford.
- Fleet size and whether cleaning is a turnaround job or a scheduled weekly task.
- Shift length, and whether the round is broken by driving between sites.
These numbers decide runtime and tank size. A mains-fed unit such as the HW02 — 220 V, 6 kW heating power, around 160°C steam temperature and roughly 0.8 MPa vapor pressure, with an 80 L SUS304 tank, dry and wet steam modes and a vacuum function on the same machine — suits a fixed bay with volume. For a moving round, our driving-style mobile machines offer dry steam, wet steam and hot water in battery and without-battery versions; the Driving Style Steam Cleaning Machine PowerDe HMW2 (without battery) listing also states leakage, short-circuit, high-temperature, high-voltage and water-shortage protection. Where the crew works along a long vehicle without a supply point, the hand pushed steam cleaning machine PowerDe HMW3 carries a 50 L clean-water tank with a 4.5 kW PTC heater.
4. Access, handling and the physical route
- How the machine reaches the cab: gate widths, kerb heights, steps, and whether it must be carried or rolled.
- Hose reach from where the machine can actually stand to the far side of the cab and into the rear of the interior.
- Storage on the vehicle, if the crew travels with the machine.
5. Tooling and the record the client expects
- Tools for the interior: narrow lance for vents and tracks, a low-moisture finish for trim, a vacuum function where trim must be dried rather than left damp.
- Tools for the exterior: flat tool for panels, extension for arches and chassis.
- Whether the operator or a haulage client requires a signed record per cab — vehicle registration, surfaces covered, mode used, time, and inspector.
6. The figures the brief should demand in writing
Product pages do not publish everything a buyer needs, and guessing them is how a depot ends up with the wrong fleet specification. The brief should require the supplier to state, for the exact model quoted: runtime on a battery charge and recharge time; consumption per hour in each mode; hose and wand lengths and the accessory set; steam temperature and pressure by mode where not listed; and the inlet fitting. Our PowerDe cleaning equipment series page shows the mains and battery or mobile variants together, which makes the comparison straightforward once the brief above is written.
Send us that brief — location, scope by surface, cabs per shift, and what the wash point supplies — and we will specify the machine, the modes and the accessories for it, and tell you plainly which parts of the scope steam should not be used on.
