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Stihl Hedge Trimmer: Gearbox & Blade Repair

The blades on this Stihl hedge trimmer were bound up and wouldn't stroke. There was no obvious debris preventing the stroke.  Accessing the gearbox revealed worn lobes on the spur gear and worn driving rings on both blades. Lack of lubrication was likely the cause.

The spur gear was replaced and an attempted repair was made on the blades. After short use. The repaired blades failed (cracked at the driven end) and replacements were installed.

Watch the video to see the repair was done on a Stihl HS56C commercial head trimmer.

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Heavy Duty Grease

High Temp Grease, 2 pk

Blow Gun

Adjustable rate air nozzle

Impact Driver Socket Adapters

1/4", 3/8", and 1/2" Socket Adapters for 1/4" Impact Driver

Disposable Gloves

8mil disposable work gloves

Medium Threadlocker

Permatex Medium Strength Threadlocker BLUE

Grease Gun

Quality grease gun and coupler

Torx Bit Set

12-piece torx bit set, 3/8" drive

Makita Drill & Driver Combo

Brushless 1/4" Impact and 1/2" Drill Combo (5.0Ah)

Disposable Shop Towels

Scott Blue Shop Towels in a Box


Aerosol brake and parts cleaner

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