Case Study: Truck Parts Coating Line, Vietnam
Summary
A coating line for truck parts at a plant in Binh Duong province, Vietnam, that assembles a Chinese automaker's light, medium and heavy trucks, tractor units, special-purpose vehicles and buses from CKD and IKD kits. The line is an overhead conveyor with a pumped pretreatment section and its own control cabinet feeding parts straight into the spray booth and curing oven, so cleaned parts are coated without re-handling, with exhaust treatment included. The line coats truck and commercial vehicle parts in 2026.
Project Background
The client assembles a Chinese automaker’s light, medium and heavy trucks, tractor units, special-purpose vehicles and buses in Binh Duong province, near Ho Chi Minh City, from CKD and IKD kits. MUSI supplied a coating line for truck parts.
The plant is a joint venture with the JAC brand's Vietnamese partners and assembles JAC light and medium trucks from CKD and IKD kits.
The Challenge
Truck parts come in many shapes and sizes, from brackets to large panels, and they work in heat, humidity and heavy rain. Coating quality depends on clean steel, so pretreatment has to be controlled as tightly as the spraying itself.
MUSI's Solution
MUSI supplied an overhead conveyor coating line with a pumped pretreatment section and its own control cabinet, feeding parts straight into the spray booth and curing, so cleaned parts are coated without re-handling.
Equipment Scope
- Pretreatment tanks with pumps and control cabinet
- Overhead conveyor
- Spray booth
- Curing oven
- Exhaust treatment
Results
The line coats truck and commercial vehicle parts for the client’s assembly operation in Vietnam.
Selection logic: why this configuration
A pumped pretreatment section with its own control cabinet was placed at the head of the line because in Vietnam's heat and humidity the interval between cleaning and coating is where flash rust starts; parts go from the last rinse to the booth on the same conveyor. An overhead conveyor was chosen because truck parts range from brackets to panels and all hang.
Scope of supply and key components
| Item | Specification | Notes |
|---|---|---|
| Pretreatment | Tanks with pumps and control cabinet | |
| Overhead conveyor | ||
| Spray booth | ||
| Curing oven | ||
| Exhaust treatment |
Key components
Key components are available from international brands, configurable per customer specification, so that spare parts can be sourced locally over the life of the line. Brand names below are the usual options for this type of equipment; the brands actually fitted are fixed in the contract specification.
| Component | Brands available on request |
|---|---|
| Pretreatment pumps and chemistry | Grundfos CR, KSB Etanorm, Xylem; Henkel BONDERITE, Chemetall Gardobond, PPG Zircobond, Nippon Paint |
| Automatic liquid guns, pumps and 2K proportioners | Graco ProMix 2KS, Sames Airmix, WAGNER AirCoat, Nordson, Binks (Carlisle Fluid Technologies) |
| Automatic powder guns and powder feed | Gema OptiGun, Nordson Encore, WAGNER PEA-X1, Sames (formerly SAMES KREMLIN) |
| Oven and dryer gas burners | Riello RS series, Weishaupt monarch WM-G, Baltur TBG, Honeywell Maxon OVENPAK, Eclipse |
| PLC and HMI | Siemens SIMATIC S7-1500, Mitsubishi Electric MELSEC iQ-R, Schneider Electric Modicon, OMRON NX, Rockwell Automation Allen-Bradley |
| Variable-frequency drives | ABB ACS580, Siemens SINAMICS G120, Danfoss VLT, Schneider Electric Altivar, Yaskawa, Mitsubishi Electric |
| Conveyor gear motors | SEW-EURODRIVE, NORD DRIVESYSTEMS, Bonfiglioli, Siemens, Sumitomo Drive Technologies |
| Sensors and temperature controllers | SICK, Pepperl+Fuchs, OMRON E5CC, Honeywell UDC, Yokogawa UT, ifm, KEYENCE |
Not included in the scope of supply
- Civil works, foundations and pits
- Building services up to the battery limit: power supply, gas, compressed air, water and drainage
- Local permits, emission approvals and third-party inspections
- Paint or powder supply, unless stated in the contract
Services included with every line: engineering design, manufacturing, shipping documentation, installation supervision, commissioning, operator training, warranty and spare parts.
Typical programme
The durations below are typical for equipment of this class and are given for planning; they are not the recorded schedule of this project. A complete line usually runs 90–180 days from contract to acceptance, a single unit 30–60 days.
| Stage | Typical duration | What happens |
|---|---|---|
| Site survey and workpiece review | 5–10 days | Remote review of drawings and photos, or an engineer visit |
| Layout and detail design | 15–30 days | Layout drawing, utilities list and specification sign-off |
| Manufacturing | 45–90 days | Booths, ovens, conveyor, pretreatment and controls built and pre-assembled at the works |
| Shipping | 20–45 days | Sea freight; equipment shipped in sections for on-site assembly |
| Installation | 15–40 days | MUSI supervision with the client's installation crew or MUSI crew |
| Commissioning, training and acceptance | 7–15 days | Trial runs on the client's parts, operator training, acceptance record |
Applicability and limits
The line is sized for the range of truck parts hung on one conveyor; large cabs or complete frames need a separate line. Humidity control in the booth and pretreatment dry-off is site-specific and follows the humidity guide linked below.
Results shown in this case study reflect the stated operating conditions and should not be interpreted as guaranteed performance under different feed, production, environmental, or site conditions.
After-sales and spare parts
Warranty on a MUSI coating line runs from acceptance: 12 months on the complete line excluding consumables, 36 months on critical components such as motors, drives and the PLC, and 60 months on structural parts such as steel structure, ducting and oven bodies. Failures within warranty, excluding misuse, are repaired free of charge.
Support starts remotely: the service line is staffed around the clock, a preliminary diagnosis with recommendations is given within 2 hours, and where a site visit is needed an engineer reaches any major city within 72 hours. A spare-parts inventory is held at the Changzhou headquarters with same-day shipping, and customers can keep a dedicated parts stock at MUSI for emergencies. Details are on the after-sales service page.
FAQ
How is flash rust avoided in a humid climate? By keeping the time between the last rinse and the booth short on one conveyor, with a dry-off stage sized for the humidity, and by controlling the pretreatment chemistry from its own cabinet.
What parts run on the line? Truck and commercial vehicle parts from brackets to panels, hung on the overhead conveyor.
Why does the pretreatment have its own control cabinet? So pump operation, temperatures and dosing are controlled and logged independently of the conveyor, which is what keeps cleaning consistent.
What vehicles does the plant assemble? JAC light and medium trucks and related commercial vehicles, from CKD and IKD kits, at the joint-venture plant in Binh Duong.
Is the line running? Yes, coating truck and commercial vehicle parts for the assembly operation.
Next step: a configuration proposal for a similar line
If your parts, volumes or plant conditions are close to this project, MUSI can return a line configuration and layout proposal. To prepare it we need four things:
- Photos and dimensions of the workpieces, with weight and material
- Required output (pieces per hour or per day, and shifts)
- Number of colours and how often colour changes are needed
- Available floor space and ceiling height, with the utilities on site
Message us on WhatsApp with these details, or use the quotation form.
Published 2026-09-26 · Updated 2026-09-30 · Last technical review: 2026-09-30
Get a Similar Solution
If your industry and requirements match this case, contact MUSI to schedule a free consultation. We'll design an optimal solution based on your specific workpieces, capacity, and facility.
Provided by Lin Cong, Technical Director, MUSI Technology