Part Location Diagram of 105-6839 Toro Gasket-gearcase
See part L-11 in the diagram
( Grid squares measure 1x1 inch )

Gasket-gearcase 105-6839

Manufactured by:
Toro
ERP Number:
ERP8826663
Part Number:
105-6839
Original Equipment Manufacturer ?
  Works with your model  20003!
$6.96
In Stock
Delivers in 3-5 Business Days!
Minimum Quantity of 2 required

A Bit Difficult 

More than 2 hours 

(4 rated repairs) ?
  Works with your model   20003!

Product Description

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This is an authentic replacement part manufactured for use with walk-behind lawnmowers. The gearcase gasket is used to seal the connection between the upper and lower gearcase covers. This gearcase gasket is available as an individual replacement part, please see model diagram for associative parts.

Troubleshooting

This part works with the following brands:
  • Toro
  • Lawn Boy
  • Jet
This part works with the following products:
  • Lawn Mower
Part# 105-6839 replaces these:
105-6839,

Questions & Answers

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Customer Repair Instructions

All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.

A Bit Difficult 

More than 2 hours 

(4 rated repairs) ?
  • 1
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Sorry, we couldn't find any existing installation instruction that matched.

Grinding noise in left wheel, loss of self propel function

Jim from Knoxville, Tennessee

4 of 4 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
More than 2 hours
Tools:
Nutdriver, Pliers, Screw drivers, Socket set, Wrench (Adjustable)
Removed back wheels, gears and axel.
Removed mower blade and belt.
Rebuilt transmission and repackaged with grease.
Reassembled and found an extra spacer. Eventually found it went in between the main engine shaft and the blade\'s shaft-bracket. If you leave this off then the engine won\'t turn due to clamping friction of the bracket against the engine\'s bottom.
After reassembling with all new parts and testing, the left wheel gears still sounded bad (grinding). Read different website forums from 2010-now where some people fixed this design/tolerance issue by adding spacers between the left wheel mount and the mower body. I added those and the grinding went away.
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Transmission slipping

Linda from Longmeadow, Massachusetts

0 of 1 people found this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
1- 2 hours
Tools:
Socket set
Parts Used:
108-9756, 105-1839, 105-6839
Opened the transmission, cleaned all the old grease and dirt from every part, put a washer on the drive gear to make up fit the gear wear, packed it with new grease and put it back together. It works again!
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Gear box gear broke

Tim from Palm Bay, Florida

0 of 1 people found this instruction helpful.
Difficulty Level:
Difficult
Total Repair Time:
More than 2 hours
Tools:
Pliers, Screw drivers, Socket set, Wrench set
Parts Used:
92-5790, 38-7820, 105-6839
1. Had to take rear wheels, and all shafts off wheels { watch half moon keys and springs under}. mark R/L sides. remove gear box
2 take gear box apart
2 a , Had to clean out old grease , clean up gear box
3 take pinion gear out{ can put socket on both ends to unscrew}
4 Didn\'t have to replace ring gear
5. pu t grease in gear box , put gear box together
6 reinstall gear box.
7. taking gear box out of mower was hardest part, I watch u-tube 1st ,Kinda made it easier.
8
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Drive gears worn out.

Roger from Milford, Michigan

0 of 1 people found this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
1- 2 hours
Tools:
Nutdriver, Pliers, Screw drivers, Socket set, Wrench set
Parts Used:
92-5790, 105-6839, 104-8671
1.Got Toro manual for drive system on line.
2.Disassembled drive system by removing front axle and removing gears from gear box.
3.Ordered gears and gasket from ereplacementparts.
4.Reassembled, greased gear box and axle assembly. Works great.
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  • 1

Model Cross Reference

This part works with the following models:
ERP Number: ERP8826663
Manufacturer Part Number: 105-6839
Brand Model Number Description
Lawn Boy 10655 Lawn Mower - Gold Series Lawnmower
Lawn Boy 10656 Lawn Mower - Gold Series Lawnmower
Lawn Boy 10672 Lawn Mower - Insight Gold Lawn Mower
Lawn Boy 10673 Lawn Mower - Insight Gold Lawn Mower
Lawn Boy 10682 Lawn Mower - Insight Lawn Mower
Lawn Boy 10684 Lawn Mower - Insight Lawn Mower
Lawn Boy 10684C Lawn Mower - Insight Lawn Mower
Lawn Boy 10685 Lawn Mower - Insight Lawn Mower
Lawn Boy 10686 Lawn Mower - Insight Lawn Mower
Lawn Boy 10686C Lawn Mower - Insight Lawn Mower
Lawn Boy 10687 Lawn Mower - Insight Lawn Mower
Lawn Boy 10695 Lawn Mower - Insight Gold Lawn Mower
Lawn Boy 10696 Lawn Mower - Insight Gold Lawn Mower
Lawn Boy 10696C Lawn Mower - Insight Gold Lawn Mower
Lawn Boy 10697 Lawn Mower - Insight Gold Lawn Mower
Lawn Boy 10995 Lawn Mower - Insight Gold Lawn Mower
Lawn Boy 10997 Lawn Mower - Insight Gold Lawn Mower
Toro 20001 Lawn Mower - Lawn Mower
Toro 20003 Lawn Mower - Lawn Mower
Toro 20005 Lawn Mower - Lawn Mower
Toro 20007 Lawn Mower - Lawn Mower
Toro 20012 Lawn Mower - Lawn Mower
Toro 20013 Lawn Mower - Lawn Mower
Toro 20014 Lawn Mower - Lawn Mower
Toro 20016 Lawn Mower - Lawn Mower
Toro 20017 Lawn Mower - Lawn Mower
Toro 20018 Lawn Mower - Lawn Mower
Toro 20019 Lawn Mower - Lawn Mower
Toro 20031 Lawn Mower - Lawn Mower
Toro 20041 Lawn Mower - Lawn Mower