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3397400 MTD Lawn Mower - Overview

Diagrams for 3397400

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Parts for the 3397400

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Lawn Mower Hex Flange Bearing – Part Number: 941-0656A
$6.40
Special Order
Lawn Mower Air Valve – Part Number: 934-0255
$6.40
In Stock
Lawn Mower Air Valve
★★★★★
★★★★★
(1)
Part #934-0255
The air valve attaches to the wheel and is made of a durable material. This is a genuine MTD, Ryobi, Yard Machines, Bolens, Troy-Bilt, and Yard Man part sourced directly from the manufacturer for use in chippers, shredders, cultivators, edgers, lawn tractors, snowblowers, and trimmers. Keep in mind that this part is sold individually. When replacing this item a set of pliers might be required during the installation process. It might wear out over time and will need replacing.
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Nut, Jam Lock, 3/8-24, Gr2 – Part Number: 712-0262
$6.40
In Stock
Nut, Jam Lock, 3/8-24, Gr2
Part #712-0262
It is a genuine item that is sourced directly from the original equipment manufacturer for use with lawn and garden equipment. This is a standard hardware which may have multiple applications depending on the model of your unit, please make sure to check the appropriate diagrams for the correct location and use of this hex jam nut. Keep in mind this high-quality item is made of durable metal and is sold individually.
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Yardman / MTD wouldn't steer left, makes a popping and grinding noise when turning.
7 of 13 people found this instruction helpful.
  • Patrick from Northville, NY
  • Difficult
  • 1- 2 hours
  • Pliers, Screw drivers, Socket set, Wrench set
To disconnect the steering shaft to replace the bearing, there is a #3 Philips head screw on the underside of the deck which needs to be taken out. Chances are it hasn't been replaced before, so it is likely very tight. I ended up dropping the deck to allow for more room but it could probably be done with the deck in place the way I had t o do it. I had someone hold the steering wheel up top (not undoing the 13mm bolt holding the steering wheel in) and tried to unscrew the Philips, even after heating it with a torch still stripped out. The only way I could get the screw out was to take a pair of Vice Grips adjusted extremely tight to the outside of the screw and put the torch on it to heat it again. Then, turn the steering wheel to the left and when the Vice Grips get caught on the bottom of the mower, it will unthread the steering wheel from the screw. After the screw and washer are out *TAKE NOTE OF THE ORIENTATION OF THE WASHER*, I went to the hardware store and replaced the screw with a bolt that was 5/16 - 18 x .750 which was the closest length they had, took out the worn out bearing, popped in the new one, reinstalled the washer and bolt, then the deck. Even if you get the philips screw out without using Vice Grips, I would still recommend replacing it with a bolt.
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