A cleaning trial in a vehicle maintenance bay usually fails before the first machine is switched on. The equipment arrives, the technician reads the manual, and then discovers that the bay has no water inlet near the work area, the drain is under the car lift, the cable run crosses the drive lane, and the only parking position leaves no room to open a door. The trial itself goes well; the site conditions make the result unusable. Preparing the bay takes about a day of practical checks, and it is the difference between a trial that gives you a decision and a trial that gives you a report nobody acts on.
This guide covers how our engineers ask customers to prepare a bay before we ship a machine for evaluation. If you run a service station, a parking facility, a fleet depot, a workshop or a detailing business, work through the checklist below and you will get a comparable result from the trial.
1. Write down what a clean bay should look like
Before you move any equipment, decide what you are testing for. "Clean" is not a criterion. Write a short line for each job you care about, in the words your own staff would use. Typical examples we see:
- Engine bay: no visible oil film on the block, no wet residue left in the wiring loom area.
- Interior: seats and floor free of loose grit, no strong cleaning smell left at handover.
- Exterior: road film removed from sills and wheel arches without a second rinse pass.
- Workshop floor and tools: grease patches lifted so the floor is not slippery.
Share that list with the two or three technicians who will run the trial. A steam cleaning machine behaves differently from a pressure washer, and your staff need to know which outcome they are judging. If the target is a heavy oil film on a commercial vehicle, the trial should be planned around a fleet job, not a passenger car.
2. Fix the utility points: power, water, drainage
This is where most bays need real work, and it is the part you can finish before the machine arrives.
Power
Check the supply at the point where the machine will actually stand, not at the distribution board. Our fixed units such as the Fixed Steam Cleaning Machine PowerDe HW02 run on 220 V with a 6 kW heating element, so a single socket on a shared lighting circuit will not carry it. Confirm the socket rating, the circuit breaker size, and whether the socket is on the same phase and same protective-earth arrangement as the machine. Keep the extension cable as short as practicable and route it along a wall, not across the lane where vehicles drive.
If the bay has no usable supply, decide now whether an electrician will install a dedicated outlet, or whether the trial should be run with a battery-equipped mobile unit instead. Our driving style steam cleaner PowerDe HMW2 and the PWD series work from an on-board 48 V battery, which removes the supply question in a rented or shared bay. Tell us which route you have chosen before we specify the machine.
Water
Our machines take tap water through a 4-point internal-tooth fitting, and the HW02 carries an 80 L stainless tank. That tank capacity is what lets a technician work away from the tap for a full vehicle. Even so, you need a tap within a reasonable hose reach for filling and for rinsing buckets and brushes. Mark the fill point on the bay drawing so your staff do not end up dragging a hose across a clean floor.
Drainage
Steam and low-volume hot water produce far less run-off than a pressure washer, but you still need somewhere for the wash water and the loosened grease to go. Check that the drain in the bay is clear, that it is not the rainwater drain, and that your local rules on oil and grease separation are met. If the bay floor falls away from the drain, that is a good thing to know before the trial, not after.
3. Clear the layout and give the machine room to move
Measure the working envelope, not just the parking space. The HW02 with its handles occupies roughly 1,200 × 800 × 1,200 mm, and the hand-pushed HMW3 is about 1,150 × 520 × 1,030 mm. Add the length of the wand, the hose, and a person standing behind the machine, and you get the real space requirement. In a narrow indoor garage this is the deciding factor, which is why our driving-style models are built for indoor garages and tight outdoor parking positions.
For the trial, do this:
- Mark a machine parking spot next to the vehicle, so the unit is not carried across the bay.
- Remove floor obstacles: wheel chocks, loose hoses, oil trays, cardboard, and anything a cable can catch on.
- Confirm door swing and boot lid clearance where the technician needs to work around an open panel.
- Check the ceiling height and any low beam, extractor duct or lift arm that blocks a raised wand.
If the trial involves an engine compartment, agree in advance which vehicles are safe to work on and which need a cover or a dry method. Older looms, exposed alternators and open fuse boxes are the usual problem areas.
4. Assign people, and set the timing
A trial run by one curious technician tells you very little. Put the trial in the schedule as a real job and name the two or three people involved. Give them the target list from step 1, and block the same working window each day so the results are comparable.
Ask each participant to record three things per vehicle: time spent on each area, whether the cleaning target from step 1 was met, and what they had to do twice. That last column is the one that pays for itself. If a panel needs a second pass because the technique was wrong, it is a training item. If it needs a second pass because the nozzle is wrong for the job, it is an equipment specification item, and we can usually solve it before you buy.
5. Set the safety and housekeeping rules before the first start
High-temperature steam at 0.8 MPa is a workplace hazard if it is treated like a hose. Write a short rule sheet and put it on the wall of the bay:
- Point the nozzle at the work surface, never at a person, and never at a colleague's feet.
- Wear gloves and closed footwear; use eye protection when working overhead or on a wheel arch.
- Let the unit complete its protection routines. Our machines include leakage, short-circuit, high-temperature, high-voltage and water-shortage protection, and a blocked or bypassed protection is a fault to report, not a problem to work around.
- Switch the machine off and release pressure before changing a nozzle or walking away.
- Keep the fill point and the electrical socket dry, and report any tripped breaker immediately.
Add one housekeeping rule for the trial period: keep a written log of machine settings used for each job. Dry steam and wet steam do different work, and a log lets you repeat a good result instead of rediscovering it next month.
6. Decide what counts as a successful trial
Before the machine arrives, agree the numbers you will compare against your current method. Write them on one page:
- Time per vehicle for each area (exterior, interior, engine bay, wheels).
- Water used and chemicals used, compared with the current process.
- Rework rate: how many jobs come back for a second attempt.
- Run-off volume and any drainage or separation cost you now carry.
- Labour effort as reported by the technicians, in their own words.
Send us that page. If your target is a busy forecourt or a fleet yard, we will match the machine and the nozzle set to those numbers rather than to a generic specification. Where a standard model does not fit your bay, our customized steam cleaning equipment service covers configuration changes, and the same engineering team handles steam cleaning equipment testing before delivery.
What to send us before the trial
A short email with five items is enough to make the visit productive:
- A photo of the bay from the vehicle entry point, plus the width and ceiling height.
- A photo of the nearest power outlet and the nearest water tap.
- The vehicle mix you want to test (cars, vans, trucks, plant machinery).
- The cleaning target list from step 1.
- The two dates that suit your staff best.
If you want a second opinion on your bay before you commit to a machine, send those five items and the layout drawing to sales@powerde.net or call +86 13023198376. Shenzhen PowerDe Automation Precision Equipment Co., Ltd. has built cleaning equipment since 2007, and a bay walk-through by email usually settles the specification question in one exchange.
