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Bump Head Knob

Bump Head Knob

Part Number: 791-153066B
MTDRyobiTroy-BiltYard ManBolensYard MachinesCub Cadet
Availability: 25+ in stock
Price: $11.27
Quantity:
Order within the next 3 hours
and your part ships today!

*This part replaces obsolete part #: and 791-153066.

Product Information
Manufacturer: MTD, Ryobi, Troy-Bilt, Yard Man, Bolens, Yard Machines, Cub Cadet
Product Number: 791-153066B
Classification: Part
Weight: 0.05 lbs.
Also Known As: Bump Cap, Bump Cover, Spool Cover, Bump Knob
Shipping: Ships Worldwide
Description:
This is a genuine OEM replacement part. it is sold individually.
The Bump Head Knob Assembly is the part of the trimmer that you bump on the ground to advance the cutting line from the spool.
Because of the abuse this part gets, it is advisable to order an extra one so you have on on hand.
Compatibility

This part is compatible with the following machines:

Ryobi
Troy-Bilt
Yard Man
Bolens
Expand the 150+ compatible machines
Products Compatibility

This item works with the following types of products:

  • • Trimmer
Questions & Answers

The bumper is head fine...bolt stripped?!? Once the bolt was exposed I used a wrench, but it seems to be stripped or seized no matter which direction turned, it would not loosen as a normal machine bolt smoothness. Do I replace the entire housing?!?
Jody Cash for model number TB 22 EC
Hi Jody, Thank you for your question. If the bolt is the only part that is the issue, I would replace the bolt. I hope this helps. Thank you and have a great day!
Need the bolt ? That holds the string spool on
Ted West for model number Tb465ss
Hello Ted, thank you for writing. That is a part of the Gear Box Assembly part 753-05168 for your model.
What is the difference between part 791-153066 and 791-153066B ?
Scotty for model number 791-153066B
Hi Scotty, they are the same part, 791-153066B is just the replacement part number for 791-153066. Thank you for your question and good luck with your repair!
will this bump knob fit this model? thanks for your help.
Ernest for model number TB32EC
Hello Ernest, Thank you for your question. Yes, this bump head knob will fit your model. Hope this helps!
Repair Instructions: Submitted by Customers Like You
25 of 33 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Bump Head Knob - 791-153066B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Lost the bump head knob
Got the replacement and screwed it on. Perfect fit.
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9 of 11 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Bump Head Knob - 791-153066B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
, My fingers
The Bump Head Knob Assembly would not come off so I had to hack saw it off.
I had to order the spool assembly and the bump head know assembly. Since I had to cut the bolt off I had to replace the spool assembly which fastens onto the neck of the trimmer. Everything went together smoothly. I didn't have to use any tools to replace the Bump Head Assembly but the shaft assembly with the spool; I used a wrench and philips screwdriver to put it together.
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6 of 8 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Retainer - 791-610660
Spring - 791-610317B
Bump Head Knob - 791-153066B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Wrench Set
Broken bump head
Followed manufacturers diagram, replaced broken parts and tested the trimmer.
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Tool Type:
Trimmer
Parts Used:
Bump Head Knob - 791-153066B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Pliers
Bump Knob would not advance trimmer line
Held down trimmer line and had to use pliers to loosen old bump knob. Unscrewed old bump knob then screwed on new knob and hand tightened.
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Tool Type:
Trimmer
Parts Used:
Bump Head Knob - 791-153066B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
, Slip-joint pliers
The original knob had broken and would not allow advancement of the trimming string.
I needed to use pliers to remove the old knob.
The new knob screwed on very easily and the trimmer works like the day I bought it.
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Tool Type:
Trimmer
Parts Used:
Bump Head Knob - 791-153066B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Bump head knob came off while working and could not find the original
Hand screwed the replacement bump head knob with hand
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1 of 2 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Retainer - 791-610660
Outer Spool Assembly - 753-04284
Bump Head Knob - 791-153066B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver, Pliers, 1 deep well socket
Outer spool assembly was messed up as well as the bump knob.
Removed the retaining washer, then the old outer spool. Put the new outer spool on and slid the retaining washer down the shaft. Used a deep well socket the was a bit smaller than the retaining washer, and tapped it down snug. Good to go.
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Thanks for voting and helping fellow customers!
Tool Type:
Trimmer
Parts Used:
Bump Head Knob - 791-153066B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
, No tools needed
I had a broken bump head knob
Very easy repair. Just screw on the new head. Takes less than a minute.
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Thanks for voting and helping fellow customers!
Tool Type:
Trimmer
Parts Used:
Bump Head Knob - 791-153066B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
, Hands
The bump head knob came flying of so we ordered a new one
I ordered the new bump head knob. It arrived very quickly. I pulled it out of package and screwed it onto the trimmer head.
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Tool Type:
Trimmer
Parts Used:
Retainer - 791-610660
Inner Reel - 753-1155
Outer Spool Assembly - 753-04284
Bump Head Knob - 791-153066B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver, Pliers
Trimmer head wore out
Took off old parts and put on new parts. Slip washers made it easy to put on. Then wound line on the spool and started using it.
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Reviews
4.8
Average Rating (out of 5):
17 Reviews
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  • Quality parts
    Works like a champ 👍
    Guest - September 23, 2019 Verified Purchase
    Easy repair
    Was exact part I needed.
    Guest - September 14, 2019 Verified Purchase
    Weed Wacker Away
    Thanks for the Weedeater parts. It was exactly what I needed. We forget that parts wear out, until we need a replacement. You guys had the right pars, and I received them is just a couple of days. Great prices, great service. What could a person ask for? Thanks again. ES
    Guest - September 6, 2019 Verified Purchase
    Great part
    Arrived quickly and easy to install
    Guest - August 26, 2019 Verified Purchase
    Going bump
    Right fit and the part is working as it should and it arrived in the mail in no time at all and the service was excellent above that I have ever received from anyone.
    Guest - July 29, 2019 Verified Purchase
    Direct fit
    I installed it and used it last night for about half an hour. It works perfectly. It was hard heavy plastic with a metal screw that matched right up with my trimmer.
    Guest - July 25, 2019 Verified Purchase
    easy repair
    i can use my weed wacker now
    Guest - July 24, 2019 Verified Purchase
    Perfect Fit
    So glad to find this part, Wore the other one down to where the bolt showed through. My 10+ year old weed wacker still going. Thanks.
    Guest - July 16, 2019 Verified Purchase
    thanks
    Y'all are my go to place. You aren't going to find replacement parts at the big box store. Most repairs are a simple fix. Like a switch or head knob. So most people just throw it to the curb.
    Guest - July 5, 2019 Verified Purchase
    no problems
    I thought the knob looked smaller then the one that I lost but it fit and worked fine.
    Guest - June 18, 2019 Verified Purchase
    Verified Purchase
    eReplacementParts Team
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    Product Information
    Manufacturer: MTD, Ryobi, Troy-Bilt, Yard Man, Bolens, Yard Machines, Cub Cadet
    Product Number: 791-153066B
    Classification: Part
    Weight: 0.05 lbs.
    Also Known As: Bump Cap, Bump Cover, Spool Cover, Bump Knob
    Shipping: Ships Worldwide
    Repair Guides
    Watch the Repair Video for Bump Head Knob
    Articles:
    How to Replace the Bump Knob on a Bolens String Trimmer
    Step-by-step instructions for removing and installing the bump knob on your Bolens string trimmer....
    June 25, 2018
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