Introduction
This manual provides detailed instructions for the assembly, operation, and care of your COBI 1674 Action Town Heavy Machinery building set. This set allows you to construct a dynamic construction site featuring a crane, an excavator, and four construction worker figures, along with various accessories.

Figure 1: Front view of the assembled COBI 1674 Action Town Heavy Machinery building set, showcasing the crane, bulldozer, and construction workers.
Safety Information
WARNING: This product contains small parts which may pose a choking hazard. Not suitable for children under 3 years of age. Adult supervision is recommended during assembly and play, especially for younger children.
Assembly Instructions
The COBI 1674 set includes 510 building blocks and 4 construction worker figures. A detailed, step-by-step instruction manual is provided within the product packaging to guide you through the assembly process. Please follow the diagrams carefully to ensure correct construction.
- Unpack all components and verify that all 510 blocks and 4 figures are present.
- Refer to the included printed instruction manual for detailed assembly steps.
- Begin by assembling the base structures, then proceed to the larger elements like the crane and bulldozer.
- Ensure all blocks are firmly connected to maintain structural integrity.

Figure 2: Side view of the assembled COBI 1674 construction site, showing the crane and bulldozer in detail.
Operating Features
The COBI 1674 set features several interactive elements designed to enhance play and realism:
- Crane Operation: The construction crane includes a movable arm and a winch mechanism. Rotate the gear to raise or lower the attached platform, simulating the movement of materials or workers.

Figure 3: Illustration of the crane's lifting mechanism, showing how to raise and lower objects.
- Bulldozer Blade: The bulldozer features a movable front blade. This blade can be adjusted up and down to simulate pushing and clearing debris on the construction site.

Figure 4: Demonstration of the bulldozer's adjustable front blade.
- Sewer Access Point: The set includes a sewer access point with a movable ramp, allowing figures to enter and exit the underground area.

Figure 5: The sewer access point with its movable ramp.
Maintenance and Care
To ensure the longevity and cleanliness of your COBI building set, follow these simple care guidelines:
- Cleaning: Wipe blocks with a damp cloth and mild soap if necessary. Rinse thoroughly and air dry. Do not use harsh chemicals or abrasive cleaners.
- Storage: Store the blocks in a clean, dry place away from direct sunlight and extreme temperatures to prevent warping or discoloration.
- Handling: Avoid excessive force when connecting or disconnecting blocks to prevent damage.
Troubleshooting
If you encounter any issues with your COBI 1674 building set, please refer to the following common solutions:
- Missing Parts: Double-check the packaging and assembly area. If parts are genuinely missing, contact COBI customer support with your product model number and a description of the missing components.
- Difficulty Connecting Blocks: Ensure blocks are aligned correctly. Apply gentle, even pressure. If a block is consistently difficult to connect, inspect it for any manufacturing defects.
- Structural Instability: Review the assembly instructions to ensure all steps were followed correctly and all connections are secure.
Specifications
| Feature | Detail |
|---|---|
| Model Number | 1674 |
| Number of Blocks | 510 |
| Figures Included | 4 construction workers |
| Product Dimensions (assembled) | Construction Site: 12.6 x 6.3 x 8.27 inches (320mm x 160mm x 210mm); Bulldozer: 7.7 x 3.7 x 3.7 inches (195mm x 95mm x 95mm) |
| Item Weight | 2.19 pounds |
| Recommended Age | 6 years and up |
| Material | 97% ABS plastic |
| Manufacturer | COBI Factory S.A. |
Customer Support
For further assistance, missing parts, or inquiries regarding your COBI 1674 Action Town Heavy Machinery building set, please visit the official COBI website or contact their customer service department. Keep your product model number (1674) handy when contacting support.
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