Tools / Power Tools
User Manual for Sealey MS900PS 170mm Variable Speed Sander/Polisher
Comprehensive user guide for the Sealey MS900PS 170mm Variable Speed Sander/Polisher. Includes assembly instructions, operation steps, maintenance procedures, and safety warnings.
Table of contents
Manual images
Click an image to enlargeQuick Guide from the Manual
The Sealey MS900PS is a variable speed sander/polisher designed for professional use. Important: Always disconnect from the mains power before changing accessories or performing maintenance. When polishing, do not use a speed setting above 3 (2000rpm) to avoid burning through paintwork. Always wear appropriate PPE, including eye protection, ear defenders, and a mask if dust is generated.
Safety Instructions
- Electrical Safety: Inspect power leads and plugs before use. Do not use damaged cables. Use an RCD (Residual Current Device) with all electrical products.
- General Safety: Keep the work area clean and tidy. Secure work pieces with a clamp or vice. Do not operate the tool if you are tired or under the influence of drugs/alcohol.
- Lead Paint Warning: If removing old paint that may contain lead, take strict precautions to contain dust and use appropriate respiratory protection.
Assembly
- Side Handle: Attach the side handle to either side or the top of the unit to suit your preference.
- Rubber Pad: Thread the rubber pad onto the shaft. Hold the shaft steady using the locking button (fig.2) and tighten with the provided spanner.
- Sanding Disc: Peel off the backing of the self-adhesive disc and locate it centrally onto the rubber pad.
- Polishing Bonnet: Fit the bonnet over the secured rubber pad, pull the cord to tighten, and tie a bow. Tuck the loose ends under the bonnet.
Operation
Ensure the power control switch is not locked on before plugging into the mains. Hold the polisher firmly with both hands (one on the handle grip, one on the side handle). To start, press and hold the safety lock button and squeeze the trigger. Rotate the speed selector switch to choose a speed between 1 and 6 (1400-3000rpm).
Maintenance
- Cleaning: Keep the machine clean and dry. Blow compressed air through side vents to keep motor ventilation clear.
- Carbon Brushes: Check brushes by removing the side screws (fig.4). If worn or cracked, replace them as a pair using genuine spare parts.
- Gear Grease: Replace the gear head grease after every 500 hours of use to prevent gear wear.
Technical Specifications
- Motor Power: 1300W
- Speed Range: 1400-3000rpm
- Pad Size: 170mm
- Thread Size: M14 x 2mm
- Weight: 3.8kg
- Vibration Emission: 7.678m/s²
Manufacturer information
Sealey Group
Practical help
Common problems
Tool will not start
Ensure the power supply is connected and the safety lock button is pressed while squeezing the trigger.
Excessive material removal or burning paint
Reduce the speed setting. Do not use a speed setting above 3 (2000rpm) for polishing.
Excessive vibration
Ensure the tool is well-maintained and the accessory is correctly balanced. Check that the rubber pad is securely tightened.
Before use
- Check power cable and plug for any signs of damage.
- Ensure the speed selector is set to the appropriate level for the task.
- Verify the rubber pad is securely tightened using the spanner.
- Wear eye protection, ear defenders, and a mask.
- Secure the work piece with a clamp or vice.
- Ensure the area is free from flammable materials.
Specs in practice
- 1400-3000rpm
- The variable speed range of the tool.
Images and diagrams
- Fig 1: Overview of the polisher unit, side handle, backing pad, and spanner.
- Fig 2: The locking button used to hold the shaft steady during accessory changes.
- Fig 3: The speed selector switch used to adjust the RPM.
- Fig 4: The access point for checking and replacing carbon brushes.
Model compatibility
- Use only genuine Sealey spare parts to maintain warranty and safety.
- Do not use with materials containing asbestos.
- Compatible with compound heads and lambs wool bonnets (contact stockist).
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.