Assign the duty before the machine moves
Write two columns on the task card. The first column names the deposit: traffic film on the flanks, silt in the wheel wells, salt residue along the lower body, food and drink debris inside the saloon, oil on the step grilles. The second column names the duty being asked of the machine for each deposit: lifting it off a surface, or flushing it away with volume. A industrial steam cleaning equipment selection is decided in that second column, not by the vehicle length written on the job sheet.
Ask the same question for the cabin and for the exterior, because the answers are rarely the same on one vehicle. A body panel carries an open film that is worked in the open; a stair tread carries packed grit against an anti-slip insert; a grab rail carries handling soil that a passenger touches on every boarding. Deposits that sit against a texture, a joint or a grip pattern need a different pass order from deposits that sit on an open flat, and the operator who cannot say which case applies will default to the longest pass, which is the one that drives water into joints.
Read the reach, not the length, of the vehicle
A double-deck body changes the operator's problem in three places at once. Height puts the upper flank and the roof edge outside a comfortable arm's reach, so the lance is worked at an angle that the operator cannot hold steady for a long pass. The nearside kerb edge and the offside verge are reached from different ground, and ground that a bus is parked on is rarely level enough for a stable stance. Along the underside, the chassis members, the tank housings and the skirt panels create pockets where rinse has nowhere to go until it is deliberately swept out.
Map those three places on the bay sheet before the shift: what can be worked standing, what needs a platform and a second person, and what is worked only when the vehicle has been moved. The same map decides whether the machine is pushed to the bay on its own wheels or carried in sections, and that is where the choice between a mobile steam cleaning machine and a bay-mounted unit is settled by the property list rather than by preference: mobility to reach several parked vehicles, or a fixed position with services laid once and never moved.
Reach also sets the working rhythm. Where an arm is stretched, the tendency is to move faster and hold the nozzle farther out, which is the opposite of what a textured deposit needs. Put a rest stop at each point on the map where reach fails, and record what was left there rather than pushing a second person to improvise.
Keep a written exclusion list on the vehicle
A bus is a working surface for the people who drive it, and every item that a driver touches, reads or relies on should appear on the exclusion list before the first pass: the windscreen and its seals, the mirror housings and their cables, the camera lenses, the destination display and the side marker glass, the cab glazing at the door pillar, the instrument faces, the step nosing and any loose trim panel. The list is not a judgement about those parts; it is a boundary the operator can hold without negotiating with themselves while the lance is live.
For each excluded item, name the fallback in the same line: a hand wipe with a damp cloth, a dry brush, a cloth that has been rinsed off the vehicle, a deferred job for the body shop. A fallback that is not written gets skipped at the end of a shift, and the excluded item then gets a spray pass because the operator assumed someone else had cleaned it. The list travels with the bay sheet, not with the operator, so a relief driver who boards mid-shift can see what has been kept dry and why.
Trip and reset as a shift-level habit
Ask the operator to state, before starting, the two things that stop the job: water entering a lamp joint or a door seal, and any change in what the machine is doing that they cannot explain from the hand: a change in the delivery they can feel through the lance, a loss of the steady stream they were seeing on the panel. Both cases have the same first action: stop, put the lance down, write the observation on the bay sheet, then bring the supervisor to look at it. A machine that is restarted without a written note has moved the problem into the next operator's shift.
Resets are a different matter from trips. A refill, a filter change, a hose swap and a restart after a stoppage each belong on the sheet with a name beside them. Half of the disputes about an unfinished vehicle come from resets that happened without a line written down: the second operator inherits a machine whose state they did not observe and cannot reason from.
Hand over the bay by walking it, not by talking
Depot cleaning is handed across shift breaks, and a handover that happens at the machine loses most of its value. Walk the handover along the vehicle instead. The leaving operator names each band along the flank, says what was done there, and points at what was not done and why: a skirt panel left dry because a seal looked disturbed, a rear corner left for the late shift because the reversing lane had not been closed. The incoming operator confirms the same map with their own eyes and signs the sheet.
Where a vehicle is worked from both sides at once, agree in advance which person owns each side and who owns the roof line, the doorway and the rear face, since those are the three places where two operators overlap and neither assumes responsibility. The overlap is where streaking and unworked strips survive into service.
Capture one line of evidence per bay, per shift
Operators resist records that feel like paperwork. Keep the evidence to a single line per bay per shift: the vehicle identifier, the bands that were worked, the bands that were skipped with the reason, the exclusion items that were touched by another method, and the observation from any stop. Photograph the same three views each time: the nearside flank from the front door, the doorway step from inside the saloon, the rear face from the kerb; take them from the standing position, not from an angle chosen to flatter the result.
That one line earns its keep in the argument after service, when a complaint about a film on a window or a rattle near a lamp has to be traced to a shift, a bay and a person. An operator who has written the line is also the person best placed to say what the visit did not cover: the band that was never sprayed, the seal that was kept dry on purpose, the panel that only saw the pre-work rinse.
Ask before assuming the catalogue covers your fleet
Where a depot needs a bay arrangement that its vehicles do not fit into comfortably, such as a fixed position, a lay-flat service run or a reach solution for the upper flank, customized steam cleaning equipment is the route to ask about, and the questions to ask are the same whether a machine is standard or built around the site. Ask what the supplier's vehicle-cleaning duty actually describes; ask how the unit is moved and positioned between bays in a tight yard; ask what the supplier needs from the site before quoting; ask what has been seen to go wrong on vehicles of this body type. The answers are worth more than the brochure page.
The PowerDe catalogue presents its vehicle-cleaning duty in terms of indoor garages and confined outdoor parking, and its cleaning range covers a fixed unit and mobile units intended for that kind of access. Nothing reviewed for this article states that any unit in the range has been built, dimensioned or signed off for public-transit bus work. Before a machine reaches a transit depot, suitability has to be settled with the supplier on the fleet's actual body types and bay geometry, and the site's own discharge, drainage and water-recovery rules, together with any requirement from the transit authority, have to be confirmed with the local authority. Operators who carry those two confirmations into the briefing are the ones whose work stands up afterwards.
