Overview
This 2-piece Reel Easy bump-feed trimmer head set is an aftermarket replacement for Ryobi OEM part numbers 313318001, 311759004, 311759008, 311759014, and 314608005. It is designed for straight-shaft string trimmers and Expand-It attachment systems across gas, battery, and corded Ryobi platforms. When the bump knob wears down, the retaining tabs break, or the spool housing no longer feeds line consistently, this replacement head gets your trimmer back to full cutting performance.
Key specifications
- Quantity: 2 trimmer heads per package
- Head type: Reel Easy+ bump-feed
- Shaft type: Straight shaft
- Replaces OEM parts: 313318001, 311759004, 311759008, 311759014, 314608005, AC04156, AC053N1BFH
Compatibility
Fits Ryobi straight-shaft trimmers including 4-cycle S430 (RY4CSS, RY34440), 2-cycle SS30 (RY253SS), 40V battery models (RY40250, RY40270, RY40290), 18V ONE+ Expand-It trimmers (P2009, P20220, RY15523A, RYSST44, RY40ST01), and many 26cc/30cc 2-cycle straight-shaft models. Also fits select Hart, RIDGID, Toro, Homelite, and Black Max straight-shaft trimmers. Always check your model number to confirm straight-shaft fitment.
Installation notes
Hold the shaft lock and unscrew the old head counterclockwise to remove it. Thread the new Reel Easy head onto the shaft adapter hand-tight. Wind 0.080-inch trimmer line onto the spool in the direction of the molded arrow, then feed the line ends through the eyelets and snap the cover into place. Tap the bump knob on the ground while the trimmer is running to advance fresh line as needed.
Common questions
Q: Will this 313318001 replacement head fit my Ryobi RY40270 40V straight shaft trimmer, or is it only for gas models like the S430 and RY253SS?
Yes, this head is made to fit several Ryobi straight-shaft units listed in the product title, including the RY40270, RY40250, RY40290, S430, RY34440, RY253SS, and SS30. If your trimmer model matches one of the listed compatible models, this 313318001 style head is the correct replacement style to check against your original head.
Q: I have a Ryobi EXPAND-IT unit marked RY4CSSVNM—does this replacement head install directly, or do I need to reuse any parts from my old head?
On most compatible EXPAND-IT straight shaft models, this head installs in place of the original trimmer head using the existing mounting setup on the gearbox shaft. It’s a good idea to remove the old head carefully and compare the mounting point and hardware to your original so you can reuse any required retainer or washer if your unit uses one.
Q: After installing the 313318001 head on my RY15523A, what maintenance should I do to keep it feeding line properly?
Keep the head clean and remove packed grass or debris after each use, since buildup can affect line advance and increase vibration. Also use the correct trimmer line size recommended for your Ryobi unit and inspect the head regularly for cracks or excessive wear, especially if you trim around concrete or fencing.
