Step 2: Key Questions to Ask Your Supplier

A. About Performance & Configuration (Core Upfitting Systems)

1. Sweeping System:
   1. What type of sweeping brushes are used? "Four Side Brooms + Suction Nozzle" (most common) or "Side Brooms + Main Roller Brush" (better for sand, mud, snow)?
   2. Can brooms and suction nozzles automatically avoid obstacles? What is their material (e.g., steel wire, polypropylene) and wear resistance?
   3. What is the maximum sweeping width? Can broom pressure be adjusted for different road surfaces?
2. Washing/Flushing System:
   1. What are the water and garbage tank capacities? Their ratio determines continuous operation time (e.g., 8m³ water + 6m³ hopper is common).
   2. What are the high-pressure water pump’s pressure and flow rate? Pressure affects cleaning power; flow rate impacts coverage speed.
   3. What spray bars are included? Does it have front/rear/side spraying and misting for dust suppression?
   4. Is high-pressure hot water cleaning needed? It is essential for grease but increases cost and energy consumption.
3. Suction & Dust Control System:
   1. What type of fan is used, and what are its air volume and pressure? (Core of suction power)
   2. What dust control technology is adopted? (Gravity settling, inertial separation, Venturi wet dust extraction, or filter cartridge dust removal—directly affects exhaust quality and prevents secondary pollution.)
4. Garbage Disposal & Operation:
   1. What is the hopper dumping method (e.g., forward tipping, rear lift)?
   2. What is the control method (manual, electro-hydraulic, or smart one-touch operation)?
   3. Is there an intelligent CAN bus fault diagnosis system for quick troubleshooting?

B. About the Truck Chassis (Vehicle Foundation)

1. Chassis Brand & Model: Specify the chassis brand and model (e.g., SHACMAN, Dongfeng, Foton, Jiefang)—reliable brands are critical.
2. Engine & Power Take-Off (PTO):
   1. Is the engine horsepower sufficient to power both the vehicle and upfitting systems simultaneously?
   2. Is the PTO side-mounted or rear-mounted, and what is its brand? (PTO is the upfit’s power source; reliability is key.)

C. About Price & Service

1. Price Breakdown: Does the quoted price include the chassis, upfitting systems, taxes, delivery, and commissioning fees?
2. After-Sales Service & Warranty:
   1. What are the separate warranty periods for the chassis and specialized upfitting systems?
   2. What does the warranty cover?
   3. What is the warranty policy for core components (fan, water pump, hydraulic system)?
   4. Where are the service locations? Can timely technical support and spare parts be provided in case of breakdowns?