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How do you remove the cutting head from a troy-bilt tb525 ec 4 cycle gas trimmer?

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  • Roy Cagle
    Roy Cagle Mar 20, 2011

    Can you maybe lock up the gear drive ABOVE the string head with a small diameter screwdriver by putting it into a hole in the side of the drive? On some manufacturers models, this can be done. I presume there is a nut to be removed at the end of the driveshaft to allow removal of the string head but when you turn it, the drive turns with it? I don't have any 4-stroke machines to allow examination at this time. Locking up the engine could facilitate removal of the head also; easily done on a 2-stroke model by removing the plug in the engine and inserting a length of soft, clean rope (like pull start rope) into the cylinder. This probably won't work here is the plug is in the head possibly, not the cylinder where the piston is. Post back and let me know if the lock nut turns the driveshaft when turning it.

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Ref: removing cutting head from troy-built trimmer tb525...
Just talked with Troy-Bilt company and got answer on how to remove head. seems that on the tb525, they used 3 heads over the production period. On mine, I had the slot above the head, but there was no deeper hole or notch to engage the screwdriver, etc. My head requires an allen wrench. Use the small part of the "L" shape and angle it into that notch...pointing the tip toward the shaft or engine direction. Then, hold the allen wrench upright and this will lock the shaft. Now you may turn the notched ring on the cutting head in a CCW direction (as you look from bottom to top). It will probably be very tight, but will come off. Hope this helps those who have been having trouble searching for that hole inside the notch that doesn't exist on this particular version. Good luck...

Posted on Aug 06, 2014

  • Mike Coffin
    Mike Coffin Aug 06, 2014

    the specific item number for the tb525 mentioned abovet is 41EDT52C966

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Posted on Jan 02, 2017

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SOURCE: Cannot disassemble Troy-bilt trimmer head

There is a round, rotary black part between the metal piece to which the cutting head attaches and the outer plastic seat of the cutting head. There are two square slots, each about a quarter inch wide, on opposites sides of the black piece. Slide an Allen wrench or something similar firmly into the slot. Holding the Allen wrench in a stable position, turn the outer plastic ring of the cutting head (it has scalloped edges that can be gripped firmly) counter clockwise to unscrew the cutting head from the bolt on which it is mounted. Be careful with the tool (e.g. Allen wrench) used to hold the black piece steady, as it is plastic and could be damaged by the edge of the tool.

Posted on May 04, 2011

#1 Taper
  • 1040 Answers

SOURCE: Troy Bilt TB 465SS Pony 4 cycle weed trimmer won't start

Sounds like you need to take the carb. apart and clean it. I like to use a Den Tek Brush, (used for cleaning teeth), to clean the small ports in carb. they work great for this job. Make sure to either clean or replace the small screen in thcarb. as well.

Jim

Posted on May 26, 2009

  • 10865 Answers

SOURCE: Troy Bilt Trimmer 75SS stalls at full throttle. new gas

Hello. Let me assist you. Since your trimmer runs but stalls at ful throttle it is telling you that there is a fuel problem. Not enough gas is getting through the carbeurator to satisfy the engines needs on full throttle. Most likely the carbeurator is gummed up. A common problem. Let's see if we can un gum it by getting a can or carbeurtor cleaner. Go to any auto parts store and talk to the clerk about your need.

Posted on May 20, 2009

  • 1114 Answers

SOURCE: line stuck inside head of troy-bilt trimmer

Take an awl or small diameter screw driver, same size or a bit smaller dia. than the line dia., and push it through the hole from the outside of the line head. This should push the piece of old line through the hole.
Recommendation: Leave at least one inch of line on the inside of the head, so you can grab it easily when you have to replace the line. I'll carry a pair of long nose pliers on me when I use my trimmer, so I can easily grab hold of the inside piece to pull it through.

Posted on Jun 21, 2009

s_s_m_o_k_i_
  • 162 Answers

SOURCE: Troy Bilt 4 cycle weed eater - trimmer head doesn't spin

rotate attatchment head slightly while inserting driveshaft

Posted on Jul 31, 2009

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