Garden / Brushcutters & Trimmers
User Manual for Bosch GRT 18V-33 / GFR 18V-23 Cordless Trimmer/Brushcutter
Quick guide and user manual for the Bosch GRT 18V-33 and GFR 18V-23 cordless trimmers/brushcutters. Includes setup, operation, maintenance, and troubleshooting.
Quick answers from the manual
Quick answer
- This manual covers the operation, maintenance, and safety of the Bosch GRT 18V-33 and GFR 18V-23 cordless trimmers/brushcutters. p. 1, 22
Key actions
- Mounting the protection guard p. 4
- Mounting the blade p. 11, 12
- Winding the line (EasyWind) p. 9, 24
First start
- Insert the charged battery into the battery holder until it clicks into place. p. 23
Problems and fixes
Motor will not start
Check battery charge, ensure battery is fully inserted, or remove grass wrapped around the spool.
p. 24Technical specifications
| Parameter | Value | Meaning | Pages |
|---|---|---|---|
| Rated voltage | 18 V | Operating voltage | p. 22 |
| Cutting diameter (line) | 33 cm | Cutting width with line | p. 22 |
Where to find it in the PDF
- Safety Notes p. 18, 21
- Technical Data p. 22
- Mounting and Operation p. 24
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
This manual provides instructions for the Bosch GRT 18V-33 and GFR 18V-23 cordless trimmers. These tools are designed for trimming grass, weeds, and light undergrowth. The GFR 18V-23 model also supports brush cutting with a metal blade.
- Safety: Always wear protective gear (eye, ear, head, hand, and foot protection). Keep bystanders away.
- Battery: Use only Bosch 18V batteries. Ensure the battery is fully charged before first use.
- Operation: Use the Pro-Tap system for line feeding and the EasyWind system for reloading the line.
- Maintenance: Remove the battery before any maintenance or transport.
Product Description
The tool features a handle, on/off switch with lock-off button, battery release, and a protection guard. The GFR 18V-23 model includes additional components for blade mounting.
Mounting and Installation
Follow the figures in the manual for assembly:
- Protection Guard: Mount the guard (7) using the screw (8) as shown in Figure C.
- Handle: Attach the safety handle (11) using the screw (13) as shown in Figures E and F.
- Blade (GFR 18V-23): Follow the sequence in Figure M to mount the cutting blade (23) with the spacer (21), dome washer (24), and nut (25).
Operation
Battery: Push the charged battery into the holder until it clicks. Press the release button to remove it.
Line Feeding (Pro-Tap): Lightly tap the spool on the ground while the tool is running to feed the line.
EasyWind: To reload the line without disassembling the spool, align the arrows on the spool with the Pro-Tap button, insert the line through the eyelet, and turn the button anticlockwise to wind the line.
Anti-Tangle: If the tool gets blocked, the motor automatically rotates the spool anti-clockwise for 3 seconds to clear the blockage.
Maintenance and Storage
Always remove the battery before maintenance. Keep the tool and ventilation slots clean. Store in a dry, secure place. Do not spray or immerse the tool in water.
Troubleshooting
If the motor does not start, check the battery charge and ensure it is fully inserted. If the tool vibrates heavily, check for a broken line or debris in the cutting head. For persistent issues, contact Bosch customer service.
Manufacturer information
Bosch
Practical help
Common problems
Motor will not start
Check battery charge, ensure battery is fully inserted, or remove grass wrapped around the spool.
Poor cutting performance
Move the tool more slowly, rewind the cutting line, or clean the protective guard.
Heavy vibrations
Check for broken line, remove contamination from the cutting head, or tighten the blade mounting nut (20 Nm).
Before use
- Ensure battery is charged and inserted correctly.
- Check that the cutting head or blade is not damaged.
- Ensure the protective guard is correctly mounted.
- Wear appropriate protective gear (eye, ear, head, hand, and foot protection).
Specs in practice
- Rated voltage
- 18V DC power system.
- No-load speed
- 4500-6400 min-1, the rotational speed without load.
- Cutting diameter (line)
- 33 cm cutting width using the line spool.
- Cutting diameter (blade)
- 23 cm cutting width using the metal blade (GFR 18V-23 only).
Images and diagrams
- Figure A: Overview of components.
- Figure J: EasyWind line winding procedure.
- Figure M: Blade mounting procedure (GFR 18V-23).
Model compatibility
- Compatible with Bosch 18V battery system (GBA 18V, ProCORE18V, etc.).
- Recommended performance with batteries >= 4.0 Ah.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.