Description
Overview:
This Genuine Husqvarna Thumb Wheel Assembly is an OEM replacement component for the chain brake cover system on selected Husqvarna petrol chainsaws. Built from durable, wear‐resistant materials suitable for outdoor use, it restores positive hand operation of the brake cover fastener so the chain brake can be maintained and serviced correctly. The assembly provides a secure, reliable interface for tightening and releasing the cover by hand, helping to keep the braking mechanism clean, accessible, and functioning as designed. It is a direct fit for the Husqvarna 235 E and 240 E, and other compatible models listed below. Supplied to Manufacturer Part Number (MPN) 525 88 42-01, it is a practical replacement when the original thumb wheel is worn, cracked, or stripped.
Key Features:
- Genuine Husqvarna OEM part for assured compatibility and reliability (MPN 525 88 42-01).
- Direct-fit design for specified models; no modification required.
- Robust construction for long service life under vibration, dust, oil, and cold conditions.
- Helps maintain correct function of the chain brake cover and related safety components.
- Smooth hand operation for easy tightening and release of the cover in routine maintenance.
- Simple to install with basic tools; straightforward swap for damaged or missing units.
- Stable retention of the clutch/chain brake cover to protect internal mechanisms.
- Supports safe, consistent chainsaw operation by keeping the brake system accessible.
Typical Applications:
Replacement of a worn, cracked, or lost thumb wheel on Husqvarna chainsaws used for felling, limbing, pruning, firewood cutting, grounds maintenance, and light construction tasks. Ideal for routine servicing, restoring secure cover fastening after impact damage, or preventative maintenance in domestic, trade, and hire fleet environments where reliable chain brake performance and quick access to the bar and chain are required.
Also known as:
Thumb screw, hand wheel, brake cover fastener, clutch cover knob, bar cover knob, chain brake cover wheel, chainsaw cover thumb nut. These terms are commonly used for the hand-operated wheel that secures the clutch/chain brake cover on compatible Husqvarna saws.
Fits Models:
120E Mark II, 235, 235 E, 236, 236 E, 240 E, 240 E TrioBrake
Alternate Part Numbers:
525 88 42-01, 525884201
Product Specifications
| L&S Part No. | 525 88 42 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 525884201 |
| Unit of Sale | 1 |
| Size | Overall Length: 23mm Overall Width: 23mm Overall Depth: 19mm |
| Applications | 120E Mark II, 235, 235 E, 235E, 236, 236 E, 236E, 240 E, 240E, 240E TrioBrake, 240ETrioBrake |
| Machine Type | Chainsaws |
| Fits Brands | Husqvarna |
| Fits Models | 236 | 120E MARK II | 235 | 236E | 240E TRIOBRAKE |
