Mobility Scooter PDI & Container Receiving Inspection: A B2B Importer’s Pre-Delivery Checklist

Mobility Scooter PDI & Container Receiving Inspection: A B2B Importer’s Pre-Delivery Checklist

When a full container of mobility scooters or electric scooters arrives at your warehouse, the work has only just begun. For importers, distributors, DME dealers, and retail chains, the hours immediately after devanning decide whether a shipment becomes a clean sale or a season of warranty disputes. A disciplined receiving and Pre-Delivery Inspection (PDI) process protects margin, keeps three-pack claims defensible, and ensures the unit a senior end user receives is safe on day one. This guide breaks the workflow into concrete steps, checklists, and timelines that procurement and service managers can hand directly to their receiving teams.

Why PDI Matters for Importers and DME Dealers

A mobility scooter that leaves a Chinese factory fully functional can still arrive damaged from ocean humidity, rough handling, or a loose crate fitting. The cost of catching a fault at the dock is a few minutes of technician time. The cost of catching it after it reaches a 78-year-old end user is a return freight, a complaint, and often a lost referral. PDI is the last controllable quality gate before ownership transfers to the customer, and for B2B buyers it is also the contractual point where supplier responsibility ends and dealer responsibility begins.

Distributors who skip structured PDI typically report defect rates of 6% to 14% surfacing in the first 30 days of use, versus 1% to 3% for operations that inspect every unit. On a 40-foot high-cube container holding 180 to 320 folded units, that difference is the gap between 2 returned scooters and 30. The math alone justifies a dedicated receiving bay and a written checklist.

Container Arrival: Unloading and Devanning

Planning the Unload

Before the truck is even booked in, the receiving team should know the manifest: how many cartons, which SKUs, and the serial-number range. Most mobility scooter containers ship 20 to 40 units in a 20-foot box and 160 to 320 units in a 40-foot high-cube, depending on whether models are fully assembled, semi-knocked-down (SKD), or completely knocked-down (CKD). Allocate a clear floor space of at least 60 to 120 square meters so cartons can be laid out, not stacked blind.

Require the driver to wait during a visual seal and container-condition check before the door is opened. Photograph the shipping seal number, both doors, and the floor of the container interior. Note the container number on the delivery receipt, and never sign a clean receipt if you see water staining, a broken seal, or a crushed corner.

Devanning and Damage Documentation

Move cartons with a pallet jack or forklift rated for at least 500 kg. Lift from the base, never the strapping, and keep cartons upright — many mobility scooter batteries are now shipped inside the unit or in a separate clearly marked carton, and tipping can stress terminals. As each carton is removed, mark it with a bay location and a sequential receiving number (for example RC-0921-001).

Conduct a first-pass damage count: separate cartons showing puncture, crushing, or water marks into a red-zone area. For a routine shipment, expect 0% to 2% of cartons to show transit damage; anything above 5% should trigger a formal carrier claim and a supplier notification within 24 hours. Keep the damaged cartons unopened until photos are taken from at least three angles, including the shipping label and the internal packing material.

The PDI Checklist: Six Core Inspection Points

Every unit should pass a standardized PDI before it is tagged “ready for sale.” The following six points cover the failure modes that account for the vast majority of early returns.

Frame and Structural Check

Inspect the main frame, tiller column, and seat post for cracks, paint chips exposing bare metal, and loose bolts. Torque the front fork and rear axle hardware to the manufacturer’s specification, typically 18 to 35 Nm for mobility scooter chassis bolts. Verify the folding or disassembly latch operates smoothly and locks with no play. A frame with more than 2 mm of visible weld splatter or any hairline crack must be flagged as a structural fault, not a cosmetic one.

Battery Voltage and State of Charge

Measure the pack voltage with a calibrated multimeter before charging. A healthy 24V lead-acid pack should read 24.0V to 26.5V at rest; a 24V lithium pack 25.2V to 29.4V depending on chemistry. Anything below 21V on lead-acid or below 22V on lithium suggests deep discharge during transit, which can permanently reduce capacity. Record the resting voltage on the PDI card for every unit, because a pre-charged battery that arrives flat is the single most common avoidable complaint.

Brake System Verification

For electromagnetic brakes on mobility scooters, confirm the scooter holds stationary on a 6 to 10 degree incline when the throttle is released. For drum or disc brakes on faster electric scooters, check lever free-play of 10 to 20 mm and pad wear within 1.5 mm of the backing plate. Roll the unit forward and apply the brake; the wheel should stop within one half-turn without a screech that indicates a glazed pad. Any brake that requires more than a firm single-finger pull is out of spec.

Lighting and Electrical Function

Power on the dashboard and cycle every light: headlight, tail light, brake light, turn signals, and the horn. Verify the battery gauge sweeps and settles, and that the speed-mode selector (where fitted) changes the indicated maximum speed. Check the charger connects with a solid click and the indicator turns from red to the in-charge color. Loose cannon connectors at the tiller are a frequent cause of intermittent dash failure and should be re-seated and zip-tied during PDI.

Tire Pressure and Wheel Condition

Inflate pneumatic tires to the sidewall specification, normally 30 to 55 psi for mobility scooter solid-rim fitments and 35 to 65 psi for larger electric scooter wheels. Use a gauge, not thumb pressure. Inspect for bead seating, sidewall cracking, and embedded debris. For solid or foam-filled tires, confirm there is no flat spot from long storage and no chunking on the tread. Note that under-inflation is the leading cause of premature motor-controller overheating on hill climbs.

Controller Firmware and Calibration

On models with a programmable controller, confirm the firmware version matches the current release sheet from the supplier. Calibrate the throttle zero-point and the speed limiter so the unit cannot exceed its market class — for example 6 km/h, 8 km/h, or 10 km/h for typical EU and UK mobility classes. A mismatch between firmware and label speed is a compliance and liability risk, not just a performance issue, and must be corrected before the unit leaves the warehouse.

Fault Classification and Warranty (三包) Standards

Not every fault is equal, and B2B buyers need a consistent way to decide repair, replace, or claim. A practical classification splits defects into three tiers.

• Class A (critical): frame crack, brake failure, controller fault, battery below 50% rated capacity, or any safety-related non-conformance. These units are quarantined and returned or replaced under supplier warranty, never sold.
• Class B (major): a non-functioning light, a loose tiller, excessive throttle play, or a tire that will not hold pressure. These are repaired in-house within 1 to 3 working days before sale.
• Class C (minor): cosmetic scuff, missing cosmetic trim, or a manual not in the local language. These are documented, photographed, and either corrected or disclosed at point of sale.

The three-pack (三包) period for mobility scooters in the Chinese export context commonly runs 12 months for the frame, 6 to 12 months for the motor and controller, and 3 to 6 months for the battery, with wear parts such as tires and brake pads explicitly excluded. Importers should map these supplier terms onto their own market’s consumer law, because the stricter of the two usually applies. Keep a fault log with serial number, class, date found, and disposition; a well-run service center should be able to show a closure rate above 95% within 10 business days.

Dealer Assembly and Technician Staffing

A semi-knocked-down mobility scooter can take 20 to 45 minutes to assemble and PDI; a fully assembled unit takes 10 to 20 minutes. Plan technician capacity against your weekly container volume. A single trained technician can realistically clear 12 to 20 units per 8-hour shift including paperwork, so a 200-unit container needs roughly 10 to 17 technician-shifts to process completely.

Staffing guidance by operation size:

• Small DME dealer (under 40 units per month): one certified technician spending 30% of their week on receiving and PDI.
• Regional distributor (40 to 200 units per month): a two-person receiving team, one for devanning and one for electrical PDI, plus a part-time admin for claims.
• National retail chain (200+ units per month): a dedicated inbound quality cell with 3 to 5 technicians, a quarantine area, and a monthly KPI review of defect rate by SKU and by container.

Technicians should hold a basic electrical safety certificate and receive supplier training on the specific controller and brake systems. Cross-training matters: a team where only one person can calibrate firmware becomes a bottleneck the week that person is on leave.

Missing-Parts Claims: Timelines and Photo Evidence

Missing components — a charger, a key set, a basket, or an owner’s manual — are the most common and most disputable shortage. The defense is strict documentation and fast notification.

• Open and count within 7 calendar days of container delivery, even if the unit is not yet being sold. Many suppliers treat the 7-day window as the deadline for shortage claims.
• Photograph the empty carton interior, the packing list, and the actual contents laid out flat, with the carton serial label visible in the same frame.
• Email the claim with photos and the serial range to the supplier’s after-sales address within the window; a screenshot of the sent email is your timestamp.
• Keep the carton for 14 to 30 days in case the carrier or supplier requests a joint inspection; discarding it early weakens your position.

Typical resolution for a valid shortage is replacement parts shipped with the next order, or a credit note of 1% to 4% of the line value. Claims filed after the 7-day window are almost always declined, so the receiving SOP should build the count into the unload day, not the sale day.

Final Test Ride and End-User Safety Briefing

Before a unit is released to a senior end user, it must be ridden, not just switched on. A short 50 to 100 meter test ride on a flat surface confirms smooth acceleration, straight-line tracking, and clean braking. Listen for controller whine, hub bearing noise, or a clicking that signals a loose spoke or magnet.

For the end-user handover, the dealer should spend 10 to 15 minutes on a safety briefing covering:

• How to read the battery gauge and the rule of recharging at 20% to 30% rather than full depletion.
• How to set the speed limiter and why the lowest class is safest for indoor or pavement use.
• How to engage the freewheel lever for pushing, and why it must be locked before riding.
• How to check tire pressure monthly and what a soft tire feels like.
• Who to call for service, and what the warranty (三包) does and does not cover.

A signed handover sheet that records the briefing and the unit’s final PDI voltage turns a vague expectation into a documented standard, and it is the dealer’s best protection against “nobody told me” complaints.

Tip: Always photograph the container seal and any damaged carton before opening, because a missing pre-open photo is the most common reason a transit claim gets rejected.

FAQ

How many technicians do I need to PDI a full container?

For a 40-foot high-cube with 180 to 320 SKD mobility scooters, plan on 10 to 17 technician-shifts. A single trained technician clears about 12 to 20 units per 8-hour shift including documentation, so a 200-unit load is roughly a two-person week or a five-person two-day push.

What battery voltage is acceptable on arrival?

A resting 24V lead-acid pack should read 24.0V to 26.5V; a 24V lithium pack 25.2V to 29.4V by chemistry. Below 21V on lead-acid or 22V on lithium indicates deep transit discharge and a likely capacity loss, which should be logged as a Class A or Class B fault depending on recovery after a full charge.

How long do I have to file a missing-parts claim?

Most suppliers require the shortage to be reported within 7 calendar days of container delivery, supported by photos of the carton interior, the packing list, and the actual contents. Claims submitted after that window are routinely declined, so the count should happen on the unload day.

What should the end-user safety briefing cover?

Spend 10 to 15 minutes on battery care, the speed limiter, the freewheel lever, monthly tire-pressure checks, and the warranty scope. A signed handover sheet recording the briefing and final PDI voltage protects the dealer and sets clear expectations for the senior user.

Which faults must never be sold, only quarantined?

Class A critical faults: frame cracks, brake failure, controller faults, batteries below 50% rated capacity, and any safety non-conformance. These units are returned or replaced under supplier warranty and must not reach an end user under any circumstance.

Why calibrate firmware during PDI?

A firmware-and-label speed mismatch is a compliance and liability risk in regulated markets, not just a performance issue. PDI is the point to confirm the controller version matches the release sheet and the speed limiter cannot exceed the unit’s class.

Related Pages

• Mobility Scooter Wholesale: Complete Buyer’s Guide 2026
• CE Certification for Mobility Scooters: Complete Guide
• How to Get the Best Price on Mobility Scooters
• Mobility Scooter Factory Audit Guide