Question about Troy Bilt Tb70ss Gas Trimmer

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How do i rewind back,the start pulling cord of my gas trimmer,i have tried diferent ways,but after asembly and pull first time,it got loose,can you helpme,please,thankyou...............ED

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Remove the tube that holds the flex-drive shaft from the front of the motor cover. Remove the throttle cable from the carburetor. Mark and unplug any wires for the on/off switch if possible. Now if you have pulled the driveshaft tube out of the way, the clutch drum is up next. Inside it, screwed into the very end of the engine's crankshaft is a Torx #25 screw. Before you loosen it, ou will have to lock up the engine. Remove the spark plug. Pull on the starter until the piston is down, then insert a length of clean, soft rope into the engine. The engine will come up and compress the rope, thus locking it in place to allow clutch drum and clutch removal. Loosen the T-25 screw inside the drum.. It probably won't come completely out...it is made this way. Next, remove the clutch. It is screwed onto a small threaded section of the crankshaft Removal is counterclockwise.. It will be pretty tight. To help, apply peneterating oil. Whack the ears of the clutch near the center with a dull flat-blade chisel and hammer unless there are bolts. then use wrench. It will turn counterclockwise for removal and there will probably be a removal direction arrow on it's face. After getting that off, remove the Torx screws holding the cover to the engine. The starter unit should be mounted inside as it mates with the top of the flywheel to start the motor. Remember to preload tension (5-7 turns) on the starter unit. Make sure the handle is installed. Jam the unit with a screwdriver or something so you can insert and tie off the new rope. Then remove jam device and let recoil pull your new rope into place. Reassemble and you are done. Disassembly requires Torx head drivers ranging from T-15 to T-25 Below are more details of this operation involving the starter recoil unit., OK...with the starter/recoil unit OFF the machine, with no rope in it, and no tension on it.....grasp the little nylon hub and turn it (clockwise is I recall) round and round 6-7 times until you feel the recoil spring get nice and tight...DO NOT LET GO OF IT!...hold it in place and then JAM the starter/recoil unit in place (still tight) inside it's housing by either clamping it with a tool like vise grips or by sticking a screwdriver thru it and thru the vents in the cover. If you have ANOTHER person to help you...one of you hold it in place....and make sure it is lined up to where you can NOW insert the new lenth of pull rope. Always use new rope....Feed the end thru the hole in the recoil unit and tie it off, by wrapping it around itself outside the nylon hub and then screw the little self-tapping set screw back in holding the rope down. OK...then feed the opposite end into the hole in the front engine cover and attatch the T pull handle....Now mind you, you are still jammming or holding the recoil in place against the spring!...Now, unclamp it or unjam it and slowly let the recoil pull the NEW rope you just installed back onto the pulley. Make sure it is fastened well on top of the pulley around the nylon hub and also fastened well onto the T pull handle. That is it. Then reconnect your wires, put your throttle cable back thru the engine cover and reinstall the Torx screws in the cover...and you are done

Posted on May 26, 2011

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1 Answer

Pull string is to loose


as big as a pain it is. you have to unscrew the pull mount and rewind it outside the wheel. they tend to loop over the top and this happens when you pull hard and let it snap back by letting it go. cord loops over the top. next time you pull it pulls it over the top and each time you do it, it becomes looser.

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TRY OPENING COVER,REWIND BY HAND,WITH THE COVER OFF SLOWLY PULL CORD OUT,WATCH AND SEE IF THE PULL CORD GETS HUNG UP.THAT MIGHT BE THE PROBLEM,
IF THE CORD COMES OUT WITH NO PROBLEM,THEN THE CORD IS NOT CLEARING THE CORD COVER,JUST LINE IT UP ANS TIGHTEN SCREWS,GOOD LUCK,

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You didn't list the model but those little rewinds are typically built very similarly.
It may sound a little crazy but it works, take the unit to a power washer such as a car wash and blow out the gook in the rewind with lots of hot soapy water and then rinse. Then using a probe or small screwdriver get the rewind unstuck. If it retracts you’re good to go if not let me know as you may have a broken piece in there and I'll need the model to know what to do next.

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You didn't list the model but those little rewinds are typically built very similarly.
It may sound a little crazy but it works, take the unit to a power washer such as a car wash and blow out the gook in the rewind with lots of hot soapy water and then rinse. Then using a probe or small screwdriver get the rewind unstuck. If it retracts you’re good to go if not let me know as you may have a broken piece in there

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It sounds like you did not properly rewind the spring that is behind the spool that the cord would around, that spring is what rewinds the cord after pulling the cord.

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you must take apart the cord recoil and rewind the pull string,inspect string make sure its the same thickness through out if not replace it, not too hard i believe you can do it.

Apr 26, 2010 | Troy Bilt Tb70ss Gas Trimmer

1 Answer

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First, make sure that the gas mixture is correct (gas and oil mixed in the right proportion). Next, press the primer bulb 3-4 times, turn the choke lever on to Full Choke, and pull the starter cord until the engine seems like to wants to start, but dies. Next, switch the choke lever to Half Choke and start the gas trimmer, giving it gas by pulling on the trigger. Once it has warmed up fully, you may be able to reduce the Half Choke to No Choke, although my 20+ years of experience with dozens and dozens of models tells me that many trimmers run better, although smoking slightly, when you keep them at Half Choke. One last tip, when pulling the cord, try pushing the trimmer away from you with the opposite hand at the exact same time that you are pulling the starter cord--the equal and opposite push-pull technique may sound like something from karate (and it is, in a way), but it is really helpful when trying to start trimmers. Best of luck, Bill

PS: Check you owner's manual (at home or online) for the proper gas/oil mixture. Empty any old gas out and replace the spark plug, if required.

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The recoil spring that rewinds the cord may have broken of pulled loose from its mooring.

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Take it apart as you did before. Look for whatever it is binding. Did you rewind the rope so there is a good amount of tension? If you didn't, then do that . Good luck, Lee

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