1. Introduction
Thank you for choosing the GASTROBACK #40966 Professional Multifunction Chopper. This appliance is designed for efficient and versatile food preparation, allowing you to chop, mix, grind, and knead various ingredients with ease. Please read this manual thoroughly before first use to ensure safe operation and optimal performance.

Figure 1.1: The GASTROBACK #40966 Professional Multifunction Chopper, fully assembled.
2. Important Safety Instructions
Always follow basic safety precautions when using electrical appliances to reduce the risk of fire, electric shock, and injury.
- Read all instructions before operating the appliance.
- Do not immerse the motor unit in water or other liquids.
- Keep hands and utensils away from the moving blades during operation to prevent severe personal injury.
- Ensure the appliance is unplugged from the outlet when not in use, before assembling or disassembling parts, and before cleaning.
- Do not operate any appliance with a damaged cord or plug, or after the appliance malfunctions or has been dropped or damaged in any manner.
- Avoid contact with moving parts.
- The use of attachments not recommended or sold by the manufacturer may cause fire, electric shock, or injury.
- Do not use outdoors.
- Do not let the cord hang over the edge of a table or counter, or touch hot surfaces.
- Always operate the appliance on a flat, stable surface.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
- Children should be supervised to ensure that they do not play with the appliance.
3. Product Overview
The GASTROBACK #40966 chopper consists of several key components designed for robust performance and ease of use.

Figure 3.1: Overview of the GASTROBACK #40966 chopper, highlighting the 1600W motor, 5-liter stainless steel bowl, and lid with blade assembly.
Components:
- Motor Unit: Contains the powerful 1600W motor and controls.
- Lid: Transparent lid with an opening for the motor unit, ensuring safe operation.
- Blade Assembly: Large 4-blade stainless steel knife for efficient chopping. Features a stainless steel blade shaft and internal gear.
- 5-Liter Stainless Steel Bowl: Robust, acid-resistant, taste-neutral, odor-neutral, and BPA-free bowl for processing ingredients.
- Non-slip Ring: Located at the base of the bowl for stability during operation.
- Safety Switch: Integrated for secure operation.
4. Setup and Assembly
Before first use, wash all parts that will come into contact with food (bowl, lid, blade assembly) in warm soapy water, then rinse and dry thoroughly.
- Place the stainless steel bowl on a stable, flat surface. Ensure the non-slip ring is securely attached to the base of the bowl.
- Carefully place the blade assembly onto the central shaft inside the bowl. Ensure it sits firmly.
- Add your ingredients to the bowl. Do not overfill beyond the maximum capacity mark.
- Place the lid onto the bowl, aligning it correctly.
- Position the motor unit onto the lid, ensuring it locks into place. The safety switch will prevent operation if the motor unit is not correctly seated.

Figure 4.1: Attaching the motor unit to the lid and bowl assembly.

Figure 4.2: The 5-liter stainless steel bowl with the transparent lid and central blade shaft.
5. Operating Instructions
The GASTROBACK #40966 chopper features two speed settings for versatile processing.
- Ensure the chopper is correctly assembled and the motor unit is securely in place.
- Plug the appliance into a suitable power outlet (240 Volts).
- Select the desired speed setting. The chopper offers 2 speeds, ranging from 3190 rpm to 4100 rpm. Use lower speeds for coarser chopping or softer ingredients, and higher speeds for finer chopping or harder ingredients.
- Press and hold the power button to operate. Release the button to stop. For optimal results, use short pulses rather than continuous operation, especially for chopping.
- After processing, unplug the appliance. Wait for the blades to completely stop before removing the motor unit, lid, and blade assembly.
- Carefully remove the processed food from the bowl.
Recommended Uses:
- Chopping: Ideal for onions, garlic, herbs, nuts, and vegetables.
- Grinding: Suitable for parmesan cheese, nuts, and spices.
- Mixing: Prepare sauces, creams, and baby food.
- Processing Meat/Fish: Can process up to 2.4 kg of meat.
- Crushing: Capable of crushing ice cubes or frozen fruits.

Figure 5.1: The chopper efficiently processing onions and garlic.

Figure 5.2: The 5-liter bowl containing finely chopped meat.
6. Maintenance and Cleaning
Regular cleaning and maintenance will ensure the longevity and optimal performance of your GASTROBACK chopper.
- Always unplug the appliance before cleaning.
- Motor Unit: Wipe the motor unit with a damp cloth. Do not immerse it in water or any other liquid.
- Bowl, Lid, and Blade Assembly: These parts can be washed in warm soapy water. Use a brush to carefully clean the blades. Rinse thoroughly and dry immediately to prevent water spots or corrosion.
- Storage: Store the assembled chopper or its components in a dry, safe place, out of reach of children.
Caution: The blades are very sharp. Handle with extreme care during cleaning and assembly.
7. Troubleshooting
If you encounter issues with your chopper, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Appliance does not start | Not plugged in; Motor unit not correctly seated; Safety switch not engaged. | Ensure plug is firmly in outlet; Re-seat motor unit on the lid; Check if lid is properly closed. |
| Blades are not rotating | Blade assembly not correctly placed; Bowl overfilled; Ingredients too large or hard. | Re-position blade assembly; Reduce quantity of ingredients; Cut ingredients into smaller pieces. |
| Motor sounds strained | Bowl overfilled; Ingredients too hard; Continuous operation for too long. | Reduce quantity; Use pulse function; Allow motor to cool down. |
If the problem persists after attempting these solutions, please contact customer support.
8. Technical Specifications
| Feature | Specification |
|---|---|
| Brand | GASTROBACK |
| Model Number | 40966 |
| Color | Silver/Black |
| Power | 1600 Watts |
| Voltage | 240 Volts |
| Material | Plastic, Stainless Steel |
| Number of Speeds | 2 (3190 rpm to 4100 rpm) |
| Bowl Capacity | 5 Liters |
| Max Meat Processing | 2.4 kg |
| Item Weight | 3.07 Kilograms |
| Product Dimensions (D x W x H) | 28.5 x 22 x 36 cm |
9. Warranty and Support
GASTROBACK products are manufactured to high-quality standards. This product includes a 2-year availability for spare parts. For specific warranty details, please refer to the warranty card included with your purchase or contact GASTROBACK customer service.
For technical support, spare parts, or service inquiries, please visit the official GASTROBACK website or contact their customer service department directly. Please have your model number (#40966) and purchase information ready when contacting support.





