Garden / Brushcutters & Trimmers
Bosch GRT 18V-33 | GFR 18V-23 Grass Trimmer and Brushcutter User Manual
Quick guide for the Bosch GRT 18V-33 and GFR 18V-23 grass trimmer and brushcutter. Includes assembly, operation, battery maintenance, and troubleshooting steps.
Quick answers from the manual
Quick answer
- This manual provides safety, assembly, operation, and maintenance instructions for the Bosch GRT 18V-33 Grass Trimmer and GFR 18V-23 Brushcutter. p. 13, 17, 20, 21
Key actions
- Charging the battery p. 19
- Inserting the battery p. 19
- Mounting the protection guard p. 20
- Mounting the blade p. 20
First start
- Charge the battery using the recommended charger. p. 19
- Insert the battery into the battery holder until it clicks into place. p. 19
Problems and fixes
Motor refuses to start
Check battery charge, allow to cool/warm, ensure battery is inserted correctly, remove grass wrapped around the spool.
p. 20
Garden tool functions intermittently
Contact Bosch customer service agent, or remove/clear cutting head blockage.
p. 20
Heavy vibrations
Check/replace broken cutting line, remove mud/contamination from cutting head, check/tighten blade mounting nut (20 Nm).
p. 21Maintenance and reset
- Remove battery before any work (maintenance, tool change, etc.). Keep product and ventilation slots clean. p. 21
- Sharpening and balancing the cutting blade. p. 21
Technical specifications
| Parameter | Value | Meaning | Pages |
|---|---|---|---|
| Rated voltage | 18 V | Operating voltage of the tool | p. 18 |
| No-load stroke speed | 4500-6400 min-1 | Rotational speed without load | p. 18 |
| Cutting diameter (line) | 33 cm | Cutting width with line | p. 18 |
| Cutting diameter (blade) | 23 cm | Cutting width with blade | p. 18 |
Where to find it in the PDF
- Safety Notes p. 13, 14, 15, 16
- Product Description and Specifications p. 17, 18, 19
- Mounting and Operation p. 20
- Troubleshooting p. 20, 21
- Maintenance and Service p. 21
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
This manual provides essential information for the safe and efficient operation of the Bosch GRT 18V-33 and GFR 18V-23 grass trimmers/brushcutters.
Safety Notes
Always wear eye, ear, and head protection. Keep bystanders at least 15 meters away. Be aware of thrown objects and blade thrust. Disconnect the battery before any maintenance work. Do not use high-pressure washers or garden hoses for cleaning.
Battery Handling
Charge the battery only with recommended chargers. Store the battery within the temperature range of -20°C to 50°C. Do not leave the battery in the product in direct sunlight.
Assembly and Operation
Refer to the figures (A-U) for assembly steps. The tool features:
- Pro-Tap: Tap the spool on the ground to feed the line.
- EasyWind: Allows line loading without disassembling the spool.
- Anti-Tangle: Automatically reverses the spool to clear blockages.
Troubleshooting
- Motor won't start: Check battery charge, ensure it is fully inserted, and remove any grass wrapped around the spool.
- Poor cutting performance: Move the device slower, clean the protection guard, or rewind the cutting line.
- Strong vibrations: Check for broken line, clean the cutting head, or ensure the spool/blade is correctly fitted.
Maintenance
Keep the product and ventilation slots clean. Store in a secure, dry place out of reach of children. Do not modify the product.
Manufacturer information
Bosch
Practical help
Common problems
Motor won't start
Check battery charge, ensure it is fully inserted, and remove any grass wrapped around the spool.
Poor cutting performance
Move the device slower, clean the protection guard, or rewind the cutting line.
Strong vibrations
Check for broken line, clean the cutting head, or ensure the spool/blade is correctly fitted.
Before use
- Check battery charge
- Ensure protection guard is mounted
- Inspect cutting tool for damage
- Clear work area of debris
Specs in practice
- Rated voltage
- 18V
- Cutting diameter (line)
- 33 cm
- Cutting diameter (blade)
- 23 cm
Images and diagrams
- Figures A-U show assembly and operation steps.
Model compatibility
- Compatible with GBA 18V and ProCORE18V batteries.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.