How to remove trimmer head from shaft. - Husqvarna 28cc Gas Line Trimmer

you dont,y7ou need to get the adapter that came with the universal head,if you try to take more than the head off,you will damage it

There are usually flats above the head to use a special flat wrench to hold it with.

Or take the engine off and hold the shaft very carefully not to scar it

Dozens of videos showing how, although you don't give a make and model of what you have?

https://www.google.com/search?q=install+a+Pivotrim+trimmer+head

Tricked into answering a 13 year old question by

Leland Keefer Feb 19, 2024
Model 316.711370

Post your own question please rather than tagging to historical ones.
..

Most trimmer heads simply unscrew from the shaft. You should see a hole above the trimmer head, in the gear box where you can insert a screwdriver or something to lock the shaft from spinning whie you unscrew it.

Some trimmer heads require you to disassemble the head and remove a clip on the inside to remove the head.

You can wrap a rag around the threaded end of the string head shaft after removing the bump knob to hold in place while turning the upper part of the string head counterclockwise to remove. Then you can do the same to remove the metal shaft adapter nut above that, exposing the flex shaft in its entirety.

I believe what you need to do is remove the 3 screws on the trimmer head to remove the head from the lower shaft. After the head is off you can look down into where the shaft goes and be able to use some needlenose pliers or something of the sort to pull the broken part out.<!-- from fixya rte -->

The shaft cable has either come loose at the head, or is broken at the engine most likely. Is this a 2 piece unit? If so, see if the cable turns with the grass trimmer section removed. If so, it is usually easiest to just replace the trimmer shaft section. One piece units require disassembly at the engine, and if you are not mechanically inclined, that can be a pain.

Remove orange sheild,remove single screw holding head in shaft then grab head with pliers and twist side to side until complete head is free.You should then be able to grab part of shaft.On power head loosen screws {about one turn each} that hold two white case halves near trigger,I think there are four,then there is a single torx screw on the bottom of lower case half in the middle that must be taken out to allow tube to be removed.Romove flexshaft from top.Check 4 plastic burnt to flexshaft,if there is you must replace tube liner as well,usally around bent part of tube the liner will go bad.

The entire trimmer assembly (from the gearbox forward) will slide off of the drive shaft cover. On the side of the aluminum gearbox assembly, you will find a single screw. This is the "anti-rotation screw" (do not lose this). Then remove the small (approximately 1" diameter) clamp from the end of the gear box assembly and simply pull the entire cutting assembly off of the shaft.

If you just want to remove the trimmer bump head assembly, then you will need to lock the bump head assembly to prevent rotation while you are working. If you purchased this new, then there should be a small metal rod included with your accessories. This will fit in a small hole in the base of the gear box assembly 791-182193 and prevents the trimmer head from rotating.

Then proceed to remove the following items:

791-180814B (replaces 791-180814) Bump Head Knob Assembly
791-147495 Inner Reel (hold the trimmer string)
791-610636B (replaces 791-610636) Spring
791-612026 Retainer (be careful removing this so you do not inadvertently destroy it). If you intend to reuse the trimmer head. If not, then hack, pry, stab, etc.. until you mangle it enough to remove.
791-683301 Outer Spool & Eyelet Assembly should now slide out leaving only 791-612483
Spool Shaft which I will assume that you want to keep.

I replaced my entire string head assembly a couple of years ago (and subsequently misplaced it and am in fact wanting to purchase one) and replaced it with a grass-gater or similar.

I hope this helps.

The drive shaft is not set all the way into position. You will have to take the front casing off, as well as the lower part of the shaft, and work it into position that way. You may have to play with it a little bit.

Jim