
Blades that jam on green wood are usually dry, not blunt.
A hedge trimmer is a gearbox with two knives bolted to it. When it stops cutting, the question is which of the three has gone.
Replacement parts
These rows come from the manufacturer’s own parts pages, read on Husqvarna. The code is the one you order by. The price is the maker’s list price on the day we read it — shops sell for less, which is what the buttons are for.
| Part | Maker’s code | List price | |
|---|---|---|---|
| Antivibration Element on 522HS75S |
525633601 | $2.99 | 🛒 Find it |
| Ignition Module Assy on 226HS99S |
589372401 | $64.99 | 🛒 Find it |
| Throttle Handle Assy on 522HS75S |
577071910 | $37.99 | 🛒 Find it |
| Diagnostic Tool Kit on 520iHT4 (tool only) |
583897101 | $199.99 | 🛒 Find it |
| Short Circuit Cable on 522HDR60S |
574488806 | $7.99 | 🛒 Find it |
| Throttle Cable Assy on 522HDR60S |
575572102 | $17.99 | 🛒 Find it |
The list price is the maker’s own, for orientation: shops sell for less, and that is what the buttons are for.
Repair it, or replace it

The whole machine
Blades and gearbox grease are worth it every time. A seized gearbox on a consumer machine rarely is. Both new and used open in the shop for your country.
Hedge trimmers: the failures that repeat
Gearboxes run dry because nobody ever opens the grease port. Blades jam because the gap between them has opened up. And the two safety triggers must both be made: one failing reads as a dead machine.
Written by the TroubleAtlas technical team from the manuals listed at the foot of this page. Where a maker documents a fault, we quote the maker.
What the maker sells as a replacement
Not “the most common failures” — nobody publishes that honestly. This is what Husqvarna stocks as a spare for these machines, fasteners excluded.
- Spring
- Gasket
- Cover
- Ring
- Wiring Assy
- Control Unit
- Sealing
- Bearing
- Gear Housing Assy
- Plate
Tools you’ll need
Chosen for this family, not a generic list. Prices and availability come from the shop in your country, with our tracking.
The machines we hold in this family
- 115iHD55 (battery and charger included)
- 115iHD55 (tool only)
- 122HD45
- 122HD60
- 122LKH
- 226HD60S
- 226HD75S
- 226HS75S
- 226HS99S
- 320iHD60 Hedge Master (battery and charger included)
- 320iHD60 Hedge Master (tool only)
- 322HD60
- 325HE3
- 325HE4
- 520iHE3 (tool only)
- 520iHT4 (tool only)
- 522HD60S
- 522HDR60S
- 522HDR75S
- 522HS75S
- 522iHD60
- 525HE3
- 525HE4
- 525HF3S
- 525iHE3
- 525iHE4 (tool only)
- 525iHF3 (tool only)
- 536LiHD60X
- Accessori, manuali e supporto per il modello 115iHD45 con batteria e caricabatterie
- Accessori, manuali e supporto per il modello 115iHD45 senza batteria e caricabatterie
- Accessori, manuali e supporto per il modello 120iTK4-H
- Accessori, manuali e supporto per il modello 122HD45
- Accessori, manuali e supporto per il modello 122HD60
- Accessori, manuali e supporto per il modello 136LiHD45
- Accessori, manuali e supporto per il modello 215iHD45 con batteria e caricabatterie
- Accessori, manuali e supporto per il modello 215iHD45 senza batteria e caricabatterie
- Accessori, manuali e supporto per il modello 226HD60S
- Accessori, manuali e supporto per il modello 226HD75S
- Accessori, manuali e supporto per il modello 226HS75S
- Accessori, manuali e supporto per il modello 226HS99S
A selection of the machines in this family.
Where this comes from
- Husqvarna Machine data, manuals and parts lists, read on the maker’s own pages.
The other families
Every machine in the section starts from one of these. Back to the garden hub.

Robot mowers
They run alone until they stop alone. Boundary wire, lifted-wheel errors, blade discs.
Open →
Riding mowers & tractors
Deck belts, PTO clutches, safety switches that cut the engine for no visible reason.
Open →
Walk-behind mowers
The machine that sat all winter and will not start in April. Carburettor, fuel, blade.
Open →
Chainsaws
Chain tension, bar wear, two-stroke mix gone stale, a clutch that drags at idle.
Open →
Trimmers & brushcutters
Line that will not feed, heads that unscrew themselves, shafts that stop turning.
Open →
Blowers & vacuums
Loss of air, impellers packed with leaves, batteries that fall off under load.
Open →
Generators
No output at the socket, AVR faults, low-oil cut-outs, dual-fuel changeover.
Open →
Pressure washers
Pressure that drops, pumps that pulse, unloader valves and blocked nozzles.
Open →
Multi-tools & pole saws
One powerhead, many attachments — and couplings that wear where they meet.
Open →
Chippers & shredders
Feed that stalls, knives that dull, chutes that block before the engine complains.
Open →TroubleAtlas Technical Team · Last checked 26 September 2026 · How we verify

