Question about Troy Bilt Tb425cs 26cc 4 - Cycle Curved - Shaft Gas Trimmer with Ez - Start and Speed Spool
The engine starts and runs well but the trimmer head does not turn.
Can you help me to fixit?
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Posted on Jan 02, 2017
The drive shaft is not seated into position properly or the shaft has
Have you had the shaft off recently? If so, take the shaft off again and try to seat the shaft as you gently pull on the rope. If you need further assistance, just let me know.
Posted on Jun 15, 2009
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.
Posted on Jul 19, 2009
Hi the key is moulded as part of the flywheel on most machines these days which doesent take much to sheer off , By the sounds of it this may well be your problem.
Posted on Sep 08, 2009
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
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