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SS720R (406147515) Ryobi Trimmer - Overview

Diagrams for SS720R

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Trimmer Bump Head Knob – Part Number: 791-153066B
$20.88
In Stock
Trimmer Bump Head Knob
★★★★★
★★★★★
(2)
Part #791-153066B
This genuine bump head knob assembly, sometimes known simply as the bump head, is black and approximately 2 inches long. Sold individually, this plastic part releases the cutting line. Over time, this part may break due to wear, and you will know it is broken because it will completely stop functioning. A troubleshooting tip is to tap the part on theg round to see if the cutting line advances. This is an easy repair to make, and does not require any tools. You will need to look for the bump head attachment point on the bottom of the cutting head assembly.
Spring-spool – Part Number: 791-610317B
$16.96
In Stock
Spring-spool
Part #791-610317B
Genuine OEM replacement part, this item is sold individually. This spring is used on all of the trimmers listed below. It is installed between the inner reel and the outer spool assembly. Its purpose is to keep pressure on the Bump Head Knob Assembly.
Retainer – Part Number: 791-610660
$7.68
In Stock
Retainer
Part #791-610660
This retainer clip is a metal piece used to secure components and provide stability inside trimmers. It is an authentic manufacturer replacement clip which is positioned on the trimmer hub and designed to hold the spool in position during use. If the retaining clip is worn down or broken, the trimmer head and outer spool will come loose and may slip off the shaft, the trimmer line will tangle and jam, and the trimmer may experience reduced power. You will need a small screwdriver and set of pliers to remove the faulty clip, and a retainer ring tool to lock the new one in position. This part is sold individually.
Lower Flexible Drive Shaft – Part Number: 791-181852
$77.52
In Stock
Lower Flexible Drive Shaft
Part #791-181852
This part is an OEM from the Ryobi manufacturer. The lower flexible drive shaft (24 3/4") is made of metal, and is compatible with multiple tools and machines. This part is used to operate the device cutting head, and is regularly secured in the draft shaft housing. It is recommended to refer to specific manual and diagrams for repair instructions. This part is sold individually. A screwdriver is often helpful in the replacement.
Upper Clamp Assembly – Part Number: 791-153597
No Longer Available
Upper Clamp Assembly
Part #791-153597
It is a genuine manufacturer-sourced replacement part that is supplied for use with handheld trimmers and tillers. This is the special clamp assembly which is used to secure the gearbox assembly to the outer boom housing. It is a high-quality component which is made of durable metal and it is sold individually.
Blade Asssembly – Part Number: 791-180553
$23.22
Special Order
Blade Asssembly
Part #791-180553
This is an original replacement part manufactured for use with grass trimmers. The blade assembly is used to trim excess line to protect the deflector shield from being damaged by the line. This blade assembly includes the nuts and bolts used to mount the blade to the guard and the blade assembly is sold as an individual part.
Hanger – Part Number: 791-612605
No Longer Available
Hanger
Part #791-612605
Outer Spool w/ Retainer – Part Number: 791-153619
$36.26
Special Order
Outer Spool w/ Retainer
Part #791-153619
This is an authentic replacement part manufactured for use with trimmers. This plastic outer spool assembly is used to house the spool of bump style trimmer heads. The outer spool assembly comes with the metal eyelets, and a retainer. The outer spool assembly is sold individually, please see model diagram for associative parts. Recommended additional parts: • Spring, part number: 791-610317B • Inner Reel, part number: 753-1155 • Bump Head Knob Assembly, part number: 791-153066B
Guard Mounting Screw Assembly – Part Number: 791-180547
No Longer Available
Guard Mounting Screw Assembly
Part #791-180547
This is an original part supplied directly from Craftsman for use on a trimmer/weedwhacker. The screws are used to secure the guard assembly to the equipment. Please note that there are several different types of screws for the trimmers/weedwhackers verify you are using the correct screws by using your model's diagrams. This part includes three screws and three nuts.
Guard and Blade Assembly – Part Number: 791-180548
No Longer Available
Guard and Blade Assembly
Part #791-180548
This is an authentic replacement part manufactured for handheld trimmers. This durable plastic guard and blade assembly act as a safety shield to protect the operator from debris. The guard includes the blade that trims excess line when feeding line while the trimmer is in use. The mounting hardware is available separately, and the guard assembly is sold individually. Recommended additional parts: • Guard Mounting Screw Assembly, part number: 791-180547
Gearbox Assembly – Part Number: 791-180549
No Longer Available
Gearbox Assembly
Part #791-180549
This is an original part from Ryobi, MTD, Bolens, Troy-Bilt, Yard-Man and Yard Machines for use with Trimmers. The gearbox assembly contains the cutting head that spins to cut grass and weeds and the gearbox that rotates to spin the cutting head. This part is sold individually. The most common reasons for replacing the gearbox assembly is if the trimmer head is not spinning (while the shaft is spinning), or there is grinding noise coming from trimmer head. The tools that you will need to replace the gearbox assembly is a small screwdriver or hex wrench, Phillip's screwdriver and a Socket/Ratchet set (or wrench set).
Eyelet eyelet – Part Number: 791-145566
No Longer Available
Eyelet eyelet
Part #791-145566
This is an authentic manufacturer-sourced replacement part for a Ryobi String Trimmer. The eyelet is used in conjunction with the outer spool and is where the trimmer line is fed through. This part is made of a metal material and is an individually sold replacement part.

Common Symptoms of the SS720R

How this model fails, and the parts that fix it.

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