Adefol Chainsaw Clutch Cover & .325" 7T Clutch Drum Kit for Husqvarna 445/450 — Complete Brake, Worm Gear & Bearing Replacement

Adefol's complete clutch cover and .325" 7-tooth clutch drum kit replaces worn brake/clutch parts on Husqvarna 445 and 450-series chainsaws to restore reliable engagement and chain drive.

This replacement kit bundles the brake clutch cover, .325" 7T clutch drum, clutch assembly, worm gear, needle bearing, and a felling dog spike so you can service common wear points in Husqvarna 445/450 family saws quickly. Each component is machined to match OEM dimensions and packaged for direct fit to models including 445, 445E, 445 II, 450, 450 E and select Rancher variants. The set targets users who need an economical, single-purchase solution to repair clutch, sprocket and chain-brake hardware with parts identified by original numbers such as 544 09 79-01 and 578 09 79-01.

How does this kit restore my chainsaw's clutch and brake performance?

The kit replaces worn teeth, drum surfaces, and the chain-brake cover that protect the clutch assembly. Fresh components reduce slippage, improve chain engagement and re-establish the protection the brake cover offers during sudden stops or contact. Proper installation helps maintain consistent torque transfer from the engine to the chain.

• Includes .325" 7T clutch drum to match original sprocket pitch and tooth count.
• New clutch assembly and worm gear for smoother engagement.
• Brake clutch cover restores housing protection and mounting points.
• Needle bearing reduces lateral wear on the drum shaft.

Which Husqvarna models and OEM numbers does this replacement fit?

The parts are intended for specific 445 and 450-series chainsaw production runs and compatible Rancher variants. Fitment covers the 2007–2011 model iterations listed by Husqvarna and references related OEM part numbers for cross-checking. Always verify your saw's model and part numbers before purchase to ensure compatibility.

• Fits Husqvarna 445, 445 E, 445 II, 450, 450 E, and 455 Rancher II where specified.
• Cross-references OEM numbers: 544 09 79-01, 578 09 79-01, 503 93 18 01, 503905901, 537110503.
• Designed for saws using a .325" pitch, 7-tooth sprocket configuration.

What comes in the package and what tools will I need to install it?

The kit ships with all main replacement items required to service the clutch and brake cover area, so you won’t need to source additional parts. Basic hand tools and a service manual or exploded view for your exact model will make installation straightforward and safe. If you are not comfortable with clutch servicing, a qualified technician can fit the parts quickly.

• Included: clutch cover, .325" 7T clutch drum, clutch assembly, worm gear, needle bearing, felling dog spike.
• Suggested tools: socket set, torque wrench, clutch removal tool (if needed), screwdrivers, protective gloves.
• Reference your chainsaw service manual for torque specs and disassembly order.

How durable are these replacement parts and what guarantee is offered?

Components are manufactured from hardened metals and bearings sized to OEM tolerances to provide long-lasting operation under typical forestry and landscaping use. The set is supplied by Adefol, a parts supplier that tests fit and finish for reliable replacement performance. Adefol offers a satisfaction guarantee to address manufacturing defects or fitment concerns.

• High-quality materials to resist wear and maintain sprocket tooth profile.
• Precision-machined drum and worm gear for consistent engagement.
• 100% refund policy for unsatisfactory items or manufacturing defects.

Who is this for: This clutch drum and brake clutch cover kit is aimed at homeowners, professional loggers, and repair shops working on Husqvarna 445/450-series chainsaws who prefer a single, matched parts solution. It's ideal when the original clutch drum or brake cover shows wear, when sprocket teeth are damaged, or when you want to replace related components at once to avoid repeat disassembly. If you run a saw frequently and need reliable, OEM-compatible replacements without hunting multiple part numbers, this kit simplifies maintenance and gets your saw back to predictable operation.