When a feed mill or integration farm measures the time needed to clean an animal feed tanker, the number usually comes from habit rather than measurement. Crews report roughly how long the job takes, supervisors plan around that figure, and nobody checks whether the estimate matches what actually happens at the wash bay. The result is a schedule that either wastes labour hours or pushes crews to rush a job that affects biosecurity. A usable estimate comes from breaking the wash into steps, timing each one on your own site, and adjusting for soil condition and surface type.
Start with the parts of the job, not the whole job
A tanker wash is not one task. Time it in sections and the estimate becomes defensible:
- Positioning and preparation: parking the vehicle, connecting utilities, laying containment, draining or sweeping out loose residue.
- Internal surfaces: the hopper walls, cones, discharge gate and any auger or flighting contacted by feed.
- External surfaces: chassis, wheels, mudguards, and the areas that collect spilled feed and road grime.
- Difficult geometry: corners, weld seams, gaskets, hinges, ribbed panels and bolted joints where residue packs in.
- Draining, drying and hand finishing: wiping seals, clearing standing water from the gate and sumps.
- Inspection and rework: the time spent going back over spots that failed the first pass.
Record each section separately with a phone timer on a normal working day, across at least three tankers. Take the average and note the range. If internal cleaning takes 25 minutes but hand finishing takes 12, an estimate built on the average alone hides where the real bottleneck is.
Surface condition matters more than tank size
Two tankers of identical capacity can need very different cleaning time. The variable that drives most of the difference is the surface the residue is bonded to:
- Smooth, sealed stainless or polished surfaces release dried feed film quickly, and the same area can usually be finished in fewer passes.
- Painted or coated steel with scratches, and bare steel with weld seams, hold residue in the surface profile and demand more scrubbing time.
- Ribbed or corrugated panels, and any area with gaskets and fasteners, multiply the per-square-metre time because each feature is a separate pass.
- Residue that has been left to set between loads — particularly wet or molasses-coated feed — takes far longer than dry, free-flowing meal from the same load.
Estimate per area rather than per vehicle. Time how long a crew member spends on one square metre of clean wall, one square metre of scratched wall, and one seam or hinge. From those unit times, a new tanker shape can be estimated by counting areas instead of waiting for a full trial.
How the cleaning method changes the estimate
The method you specify has to be the method you time, otherwise the figure is meaningless. Cold-water hosing with manual scrubbing depends almost entirely on crew effort and produces a wide range. High-temperature steam and hot-water equipment changes the profile: heat softens the grease and protein film that binds feed residue, so the operator spends less time on mechanical scrubbing and more time covering area. That usually narrows the range between fast and slow days, which is exactly what makes a schedule reliable.
The fixed installations in the PowerDe cleaning equipment range, such as the wall-mounted HW02 unit, deliver dry or wet steam through a water gun with a nozzle. The HW02 page lists a 6 kW heater, 160 °C steam temperature and 0.8 MPa vapour pressure with an 80 L SUS304 tank on a 220 V supply. Read those figures as planning inputs, not as a guaranteed cycle time: steam temperature and pressure determine how fast bonded soil releases, while tank capacity and duty cycle determine how long a crew can work before refilling or waiting for recovery. Where your site needs a different layout, power supply or wash-bay arrangement, customised cleaning equipment can be specified against the bay you actually have.
A worked example you can adapt
Suppose your own timings on a three-axle feed tanker give the following averages for a two-person crew:
- Positioning, containment and clearing loose residue: 8 minutes
- Internal walls and hopper cones: 18 minutes
- Discharge gate, gaskets and hinges: 9 minutes
- Chassis, wheels and exterior: 12 minutes
- Draining and hand finishing: 7 minutes
- Inspection and rework: 6 minutes
Those step times total 60 minutes of cleaning work. Add a changeover allowance for moving the next vehicle in, and a small buffer for the days when a load has set in the corners. A schedule figure of roughly 75 minutes per tanker is defensible because every component was measured on your own bay, and the breakdown shows immediately what to attack first if you want the number lower. If rework and hand finishing together consume a quarter of the total, the fix is better soil removal on the first pass, not a faster crew.
Turn the estimate into a repeatable standard
An estimate is only useful if it survives the shift handover. Write the step list into a wash-bay procedure, state which steps are timed, and keep the inspection step as a pass/fail check rather than a guess. Where the wash supports disease-control requirements, a written record of what was cleaned, how and for how long is what an auditor or a veterinary adviser will ask to see; a timed procedure makes that record easy to produce. Cleaning feed transport truck washing and internal hopper surfaces between loads is also part of the wider livestock facility cleaning routine that keeps residual feed from carrying contaminants between farms.
Review the figures whenever you change feed type, add a tanker body style, or change the equipment at the bay. Re-time one tanker, compare it with the stored step times, and update the standard. That is how a cleaning-time number stops being an opinion and becomes a scheduling tool.
