Propare installment of string in trimmer TB 525 CS

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

Sounds like your coil is not secured properly, adjust to spec. and tighten.

the bolt on the end has left hand threads not right hand the most bolts have

It sounds like it might be seized up. Pull the spark plug out and see if you can pull the cord that way.
Let me know what you find. How old is your machine?

Jim

Some disassembly may be required to get to the starter/recoil unit to fix this. The unit has Torx head fasteners and some level of mechanical skill is involved. Check your warranty?

Turn the bump knob clockwise to loosen on my tb490bc.

remove the guard
take out the 4 screws on the faring then split the case and remove the strings

On the bump mechanism, line up the two arrows, then unscrew the bump, this will release the spool, then you wind the two strings in the opposite directions, the arrow on the spool will tell you the direction to wind the string, replace spool, spring, bump feed, and you are good to go. I hope this has helped you.

Some of the trimmers recommend a certain size line, if you have one of these that let line out as needed, the speed at which the trimmer cuts will let out line as needed. If you have too small of line the drag for the friction let-out you will spoll all the line out. Make sure the line is the right size, They come in alot of sizes, anywhere from .060" to .125" line thickness so make sure you have the right size line!

To install string in the Ryobi you do not have to disassemble anything: Line up the two arrows on the inner and outer reel, remove any excess string, cut two pieces of string about 10 feet, feed line in the side holes, secure line in hole where it comes out the bottom (it only takes about 1/4in. to do so), pull strings tight, then turn the inner reel counter clockwise to wind it. If it sticks a little just pull line a little.
To remove the inner spool in order to remove line that has broken inside, to clean the mechanism, or to perform other maintenance, grasp the outer reel and unscrew the bump knob counter-clockwise. Mine is often very tight and requires pliers to get enough leverage. While you are in there, clean the inner reel and the inside of the outer reel to improve feed performance. The shaft rarely needs cleaning. Do not lubricate. After re-installing the reel, add string (0.080") as described above.