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See part B-19 in the diagram
( Grid squares measure 1x1 inch )

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Gear Box Assembly

★★★★★
★★★★★
2 Reviews

Rated by 1 customers 

Really Easy 

30 - 60 mins 

Ratings submitted by customers like you who bought this part.

Get this part fast! Average delivery time for in-stock parts via standard shipping: 1.8 days.

 Fits your YM70SS!
 Fits your YM70SS!
PartSelect Number PS9118330
Manufacturer Part Number 753-06571
Manufactured by MTD
Product Description

Gear Box Assembly Specifications

This gearbox is for line trimmers. Gearbox contains the gears that turn the line spool for cutting.
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Troubleshooting
This part fixes the following symptoms:
Engine revs but trimmer head will not turn
This part works with the following products:
Trimmer.
This part works with the following products:
MTD, Yard Man, Troy-Bilt, Cub Cadet.
Questions and Answers

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2 questions answered by our experts.
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Gary
May 4, 2018
How do i remove the trimmer head from the gearbox.
For model number Tc80ec troybuiltweed eater
Hi Gary, Thank you for your question. To remove the trimmer head you have to unscrew the bumper counter clockwise and then pull that piece off. From there you would simply just pull the trimmer head off. I hope that helps. Good luck with your repair.

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Jesse Shimer
June 24, 2019
I'm having trouble unscrewing the bumper. Its caused so much trouble i've looked at just buying a new one. Any suggestions on taking it off before i do that?
For model number TB32EC
Hello Jesse, thank you for your question. The bumper knob is just threaded onto the shaft, it should unscrew from the spool head. Here is a video that might help. https://www.youtube.com/watch?v=i4ZLEfIeF1Q

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Customer Repair Stories
 Average Repair Rating: 3.8 / 5.0, 1 reviews. What's this?
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Sorry, we couldn't find any existing installation instruction that matched.
The gear ssembley was not turning
I ordered the gear assembley and the boom assembley and I stalled them.
Other Parts Used:
Boom Assembly, Lower
  • Ronald from TOOL, TX
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Screw drivers
2 of 3 people found this instruction helpful.
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Customer Reviews
Average Rating:
★★★★★
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2 Reviews
2.5
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Model Cross Reference
This part works with the following models:
PartSelect Number: PS9118330
Manufacturer Part Number: 753-06571
Brand
Model Number
Description
Craftsman
31679119
Trimmer - Craftsman String Trimmer Model 316.79119 (31679119, 316 79119) Parts
MTD
41AD380C799
Trimmer - MTD String Trimmer Model 41AD380C799 Parts
Yard Man
41AD457C755
Trimmer - Straight Shaft String Trimmer
MTD
41AD780C799
Trimmer - MTD String Trimmer Model 41AD780C799 Parts
Yard Man
41ADY71C901
Trimmer - Yard-Man String Trimmer Model 41ADY71C901 Parts
MTD
41ADZ21C799
Trimmer - Trimmer
MTD
41ADZ22C983
Trimmer - MTD String Trimmer Model 41ADZ22C983 Parts
MTD
41ADZ32C799
Trimmer - Trimmer
MTD
41BD380C799
Trimmer - MTD String Trimmer Model 41BD380C799 Parts
Cub Cadet
41BDC46G912
Trimmer - Cub Cadet String Trimmer Model 41BDC46G912/2009 Parts
MTD
41BDY70C901
Trimmer - MTD String Trimmer Model 41BDY70C901 Parts
MTD
41BDZ22C983
Trimmer - MTD String Trimmer Model 41BDZ22C983 Parts
MTD
41CD380C799
Trimmer - MTD String Trimmer Model 41CD380C799 Parts
MTD
41CD475D995
Trimmer - MTD String Trimmer Model 41CD475D995 Parts
Yard Man
41CDY70C901
Trimmer - Straight Shaft String Trimmer
Cub Cadet
CC4165
Trimmer - Cub Cadet String Trimmer Model CC4165/2009 Parts
MTD
MP475
Trimmer - String Trimmer
MTD
RM2570
Trimmer - MTD String Trimmer Model RM2570 Parts
Troy-Bilt
TB32EC
Trimmer - Trimmer
Troy-Bilt
TB70SS
Trimmer - Trimmer
Troy-Bilt
TB80EC
Trimmer - Trimmer
Yard Man
YM4570
Trimmer - Trimmer
Yard Man
YM70SS
Trimmer - Trimmer
Yard Man
YM71SS
Trimmer - Trimmer

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