Hedge trimmer faults: gearbox, blades, triggers

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Hedge trimmers — Hedge Trimmers
HEDGE TRIMMERS

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.

SPARE PARTS, WITH THE MAKER’S OWN CODE

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.

PartMaker’s codeList 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.

BUY

Repair it, or replace it

A whole garden machine, new, ready to buy

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.

FAULTS

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 FOR THE JOB

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.

COVERAGE

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

Where this comes from

  • Husqvarna Machine data, manuals and parts lists, read on the maker’s own pages.
THE REST OF THE MAP

The other families

Every machine in the section starts from one of these. Back to the garden hub.

Swipe for more →

TroubleAtlas Technical Team · Last checked 26 September 2026 · How we verify

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