How to Replace Trimmer Line Bump Feed

String Trimmer Head | How to install new trimmer line on a traditional bump head

This video shows how to use a trimmer head. Learn how to install new string trimmer line in a traditional bump head.

How to install new line in a traditional bump head. The traditional bump head has a round black cutting head with a 1 and 1/2 in spring-loaded knob in the center that's the bump knob.

Installing line in a traditional bump head requires you to disassemble the cutting head but first you'll need to cut about 10 ft of line. To install you can either use twin strand split line or cut two pieces of .095 inch trimmer line to 10 ft each.

Now to disassemble the cutting head unscrew the bump knob counter clock wise and remove the inner reel and spring. Find the two holes on top of the inner reel and insert both ends of the line into one of the holes pull the line through until 2 to 3 inches remain. Then Loop your short ends over into the other hole and pull the long ends to close the loop. Now wind the line around the reel in the direction of the arrow on top. You'll have to apply some pressure to wind it evenly. When you have about 6 inches left, push each string end into the holding slots marked .095 inch and place the spring back on the shaft. Then find the eyelets on the spool head and feed the strings through. When placing the reel on the shaft align those holding slots on the Reel with the eyelets on the head holding the Reel down to compress the spring. Tighten the bump knob back on. Gently pull the lines to make sure they were released from those holding slots and you're ready to go.

Thanks for watching. You can trust all Troy-Bilt string trimmers to stand up to the task season after season.

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