Plastic Model Guides
Kenworth W-900 Dump Truck — Revell 1:25 Model Kit: Build, Paint & Assembly Guide

The Revell Kenworth W-900 Dump Truck is an unassembled 1:25 scale plastic model kit. The Muncle Mike’s listing identifies it as kit 12628, item number F977-12628. Check the kit number and 1:25 scale on the box before buying, since similar Kenworth truck kits can differ in scale and features.
Its long chassis, detailed cab and movable dump body make assembly order and paint access worth planning together. Revell rates it Level 5, intended for experienced model builders with painting and gluing knowledge. Approach it as several smaller assemblies that must eventually align, rather than trying to finish the entire truck in one sitting.
What comes in kit 12628, and why two part counts appear
The box shown in the current listing says 265 parts, matching the store description and Revell’s specification panel. Revell’s web description and included-items list also contain a conflicting 295-part figure. Use 265 as the count printed on this photographed boxing; compare the box and instructions supplied with your kit when checking its contents. A website discrepancy does not establish that a received kit is missing parts.
The kit includes a CAT 3408 turbocharged diesel V8 under an opening hood, a detailed cab with opening doors, a dual-drive-axle chassis, a movable dump body and opening tailgate. Ten soft black tires, plated trim and decals provide different materials to handle during painting and assembly.

The Muncle Mike’s product listing describes the main molded parts as white and says paint and model cement are sold separately. Review the current package contents and instructions for the exact color recommendations and assembly requirements.
Plan the chassis, cab and dump body separately
Read the complete instruction sequence before removing parts from the sprues. Locate the main assemblies and keep small parts identifiable by their numbers until you need them. The illustrations contain both glued connections and joints that must remain free; a part touching another part does not automatically mean it should be cemented.
| Assembly | Plan before finishing | Check before moving on |
|---|---|---|
| Chassis and engine | Separate areas that will be difficult to reach after the cab is fitted. | Frame alignment and engine placement, without forcing parts to meet. |
| Cab and hood | Interior paint access, glazing and the boundary between body colors. | Cab seating and hood and door clearance before adding delicate exterior trim. |
| Dump body and lift | Inside surfaces, underside details and joints marked to remain unglued. | Lowered position, lift movement and tailgate clearance. |
| Clear parts and plated trim | Which surfaces remain visible and which are actual attachment points. | A clean fit that does not depend on squeezing the finished surfaces together. |
For the long frame, use a flat work surface as a reference while checking the instruction drawings. If the rails or crossmembers sit unevenly, find the cause before adding the cab or dump body. Later assemblies can conceal a problem without correcting it.
Before gluing or painting, dry-fit the cab, hood, dump body and tailgate. Check that the opening parts clear nearby pieces and still move as intended; paint or adhesive at a hinge can limit movement. Follow Revell’s sequence and color callouts for this specific kit, and test any finish on a spare area or part when possible.
Pay particular attention to the hood hinges, telescoping lift and tailgate connections shown with no-cement symbols. Keep those specific joints free while bonding the adjacent structural parts as directed. If movement tightens after painting, stop and inspect the contact area instead of forcing the mechanism.
Choose the finish before closing up the cab
The red-and-white truck in the photographs is one finished example. Decide early whether you want that contrasting cab scheme, a single body color or a different work-truck finish. Then mark which areas need paint before they become difficult to reach: the engine, seats, dashboard and the inside and underside of the dump body deserve separate attention.

A clean fleet appearance puts the emphasis on even color boundaries and trim. A weathered work truck adds another finishing stage, so establish the basic fit and finish first. You can decide on dirt and wear later; correcting a crooked assembly becomes harder after delicate parts and additional finish layers are in place.
Revell’s instructions call for polystyrene cement and for paint or plating to be removed from cemented contact areas. That does not mean stripping every plated part. Identify the joining surfaces before painting, and follow the kit and adhesive directions for the particular connection. Use suitable tools and the ventilation and protection specified by your paints, cement and cutting equipment.
Follow this kit’s decal instructions
The official 12628 instructions say the supplied decals are compatible with setting solutions or solvents, and specify 48 hours of drying before clear coating. Follow the instructions packed with your kit and the chosen decal product and finish; the manual’s statement and waiting time do not establish that every product or clear coat is suitable.
Leave room to display the moving details
Plan more than a parking space for the closed truck. A raised dump body needs overhead room, and an open hood needs clearance at the front. Mirrors and exhaust stacks also need room around them. Check the intended shelf or case with the model in the display position you want, and support the chassis when moving it rather than lifting it by the dump body or small trim.
Revell 12628: the kit for this project
The listing photos may show an assembled example. The product is sold as an unassembled kit, so paint, cement and any other separately listed supplies are not included unless the package contents say otherwise.
Confirm the exact kit
- Match Revell kit 12628 and store item number F977-12628.
- Confirm the box identifies the 1:25 Kenworth W-900 Dump Truck.
- Check the instructions and package for the current part count and required supplies.
View the Kenworth W-900 Dump Truck kit listing · Browse Revell plastic model kits
Questions before starting the Kenworth
Is this a good first plastic model kit?
Level 5 is Revell’s experienced-builder category. The attraction here is the number of assemblies and moving details, which also creates more fit and finishing decisions. If you are still learning to make clean glued joints and paint smaller assemblies, compare a simpler project in the plastic model kit collection first.
Are all the parts white?
The main molded parts are white, but the photographed box also identifies clear and plated parts and black tires. Plan by material and surface: a white cab panel, a window and a plated grille do not all need the same treatment.
Can I paint everything after assembly?
Some exterior details remain accessible, but the completed cab and installed assemblies restrict access to the interior and adjoining surfaces. Use the instruction sequence to decide what to paint separately, while keeping joining surfaces suitable for the specified adhesive.
What should I buy separately?
The listing specifies paint and model cement as separate purchases. Build a short materials list from the instruction color chart and the tools you already own. Compare model-building supplies by material and task; a general-purpose glue or a familiar decal product is not automatically suitable for every part of this kit.
For other projects and techniques, browse the Hobby Learning Center. The Collector Guides also connect model-kit topics with display and collecting decisions.

