Medium
1-2 hours
The tine shaft oil seal is used in tillers and is made of metal and rubber. This part is priced as an individual item, but may require two for proper installation. If the seal becomes dried out or cracked it will need to be replaced. It presses onto the sides of the transmission housing and stops oil from leaking, and may require a screwdriver during replacement. This part is an OEM from Troy-Bilt.
Seal-oil 921-04036
OEM part for: Troy-Bilt, MTD, Yard Machines, Bolens, Husky
Part Number: 921-04036
$19.15
In Stock
Ships within 1 business day 
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Frequently Purchased Together ?
Compatibility
This part will fit the following 114 machines
MTD
12A-989Q795 (2008) Walk-Behind Mower View Diagrams & Manuals
21A-240P029 (2010) Walk Behind Tiller View Diagrams & Manuals
21A-240P052 (2010) Walk Behind Tiller View Diagrams & Manuals
21A-240R200 (2010) Walk Behind Tiller View Diagrams & Manuals
21A-240R229 (2010) Walk Behind Tiller View Diagrams & Manuals
21B-240R200 (2010) Walk Behind Tiller View Diagrams & Manuals
21A-250H765 (2006) Tiller View Diagrams & Manuals
21A-250H065 (2007) Tiller View Diagrams & Manuals
21A-250J265 (2007) Tiller View Diagrams & Manuals
21A-250H065 (2008) Tiller View Diagrams & Manuals
21A-250J265 (2008) Tiller View Diagrams & Manuals
21A-250H065 (2009) Tiller View Diagrams & Manuals
21A-250J265 (2009) Tiller View Diagrams & Manuals
21A-250H065 (2010) Tiller View Diagrams & Manuals
21A-250J265 (2010) Tiller View Diagrams & Manuals
Troy-Bilt
12213 4.5 HP Tiller View Diagrams & Manuals
21A-521-081 Bronco RotoTillers View Diagrams & Manuals
21A-634A766 Bronco RotoTillers View Diagrams & Manuals
21A-634B063 (2003) Bronco RotoTillers View Diagrams & Manuals
12180 Bronco RotoTillers View Diagrams & Manuals
12210 Bronco RotoTillers View Diagrams & Manuals
21A-520-081 Bronco RotoTillers View Diagrams & Manuals
21A-634F063 (2002) Bronco RotoTillers View Diagrams & Manuals
21A-643B011 (2007) Bronco RotoTillers View Diagrams & Manuals
21A-643B066 (2007) Bronco RotoTillers View Diagrams & Manuals
21A-643B711 (2006) Bronco RotoTillers View Diagrams & Manuals
21A-643B766 (2006) Bronco RotoTillers View Diagrams & Manuals
21A-643B766 (2007) Bronco RotoTillers View Diagrams & Manuals
21A-643C211 (2007) Bronco RotoTillers View Diagrams & Manuals
21A-643C266 (2007) Bronco RotoTillers View Diagrams & Manuals
21A-643C711 (2006) Bronco RotoTillers View Diagrams & Manuals
21A-643C766 (2006) Bronco RotoTillers View Diagrams & Manuals
21A-644A711 (2005) Bronco RotoTillers View Diagrams & Manuals
21A-644A766 (2005) Bronco RotoTillers View Diagrams & Manuals
21A-64M1011 (2008) Bronco RotoTillers View Diagrams & Manuals
21A-64M1066 (2008) Bronco RotoTillers View Diagrams & Manuals
21B-643B011 (2007) Bronco RotoTillers View Diagrams & Manuals
21B-643B066 (2007) Bronco RotoTillers View Diagrams & Manuals
21B-643B766 (2006) Bronco RotoTillers View Diagrams & Manuals
21B-643C211 (2007) Bronco RotoTillers View Diagrams & Manuals
21B-643C266 (2007) Bronco RotoTillers View Diagrams & Manuals
21A-640C711 Tiller View Diagrams & Manuals
12209 Tiller View Diagrams & Manuals
21A-630C063 Rear-Tine Tiller View Diagrams & Manuals
21A-644H766 Bronco Rear-Tine Tiller View Diagrams & Manuals
21A-65M1011 Super Bronco CRT Garden Tiller View Diagrams & Manuals
12155 (121551300101-121551399999) 3hp Roto-Tiller View Diagrams & Manuals
12163 (121631200101-121631299999) 3hp Roto-Tiller View Diagrams & Manuals
12190 (121901100101-121901199999) 3hp Roto-Tiller View Diagrams & Manuals
12191 (121911100101-121911199999) 5hp Roto-Tiller View Diagrams & Manuals
12193 (121931100101-121931199999) 6.5hp Roto-Tiller View Diagrams & Manuals
12208 4.5 Hp Roto - Tiller View Diagrams & Manuals
12225 Tuffy Tiller View Diagrams & Manuals
21A-510-081 (12155) Tuffy Tiller View Diagrams & Manuals
21A-511-081 (12217) Tuffy Tiller View Diagrams & Manuals
21A-512-081 (12227) Tuffy Tiller View Diagrams & Manuals
12168 (121681100101-121681199999) Versatiller 1100101-1199999 View Diagrams & Manuals
12180 (121801100101-121801299999) Bronco 5hp Tiller View Diagrams & Manuals
12214 Bronco 5.5hp Tiller View Diagrams & Manuals
12193 Econo-Horse 6.5hp Opc View Diagrams & Manuals
21A-634B063 (2002) 6.5hp Roto-Tiller View Diagrams & Manuals
21A-630C063 (2003) 4 Hp Roto-Tiller View Diagrams & Manuals
21A-634F063 (2003) 5.5 Hp Roto-Tiller View Diagrams & Manuals
21A-644H063 (2003) 6.75 Hp Roto-Tiller View Diagrams & Manuals
21A-645A063 (2003) 5 Hp Roto-Tiller View Diagrams & Manuals
21A-634K711 (2005) 7hp Frt Roto-Tiller View Diagrams & Manuals
21A-634K766 (2005) 7hp Frt Roto-Tiller View Diagrams & Manuals
21A-640C711 (2005) Tuffy Crt Roto-Tiller View Diagrams & Manuals
21A-640C766 (2005) Tuffy Crt Roto-Tiller View Diagrams & Manuals
21A-630C766 (2004) 4hp Roto-Tiller View Diagrams & Manuals
21A-634A766 (2004) 6hp Super Bronco View Diagrams & Manuals
21A-644H766 (2004) 6.75hp Roto-Tiller View Diagrams & Manuals
21A-654J766 (2004) 7hp Roto-Tiller View Diagrams & Manuals
21AE654K766 (2004) 7hp Roto-Tiller View Diagrams & Manuals
21A-643D766 (2006) Tuffy Crt Roto-Tiller View Diagrams & Manuals
21A-645A766 (2006) 5hp Crt Roto-Tiller View Diagrams & Manuals
21B-643D766 (2006) Tuffy Crt Roto-Tiller View Diagrams & Manuals
21A-645A711 (2007) 5hp Crt Roto-Tiller View Diagrams & Manuals
21A-645A766 (2007) 5hp Crt Roto-Tiller View Diagrams & Manuals
21A-655A766 (2008) 160cc Crt Roto-Tiller View Diagrams & Manuals
21A-65M1011 (2008) Super Bronco Crt Roto-Tiller View Diagrams & Manuals
21A-65M1066 (2008) Super Bronco Crt Roto-Tiller View Diagrams & Manuals
21A-630B063 (2002) 3.75hp Roto-Tiller View Diagrams & Manuals
Yard Machines
21A-240P000 (2010) Walk Behind Tiller View Diagrams & Manuals
21A-24MK000 (2010) Walk Behind Tiller View Diagrams & Manuals
21A-241E700 (2006) Tiller View Diagrams & Manuals
21A-241E729 (2006) Tiller View Diagrams & Manuals
21A-241E752 (2006) Tiller View Diagrams & Manuals
21A-241E052 (2007) Tiller View Diagrams & Manuals
21A-241F252 (2007) Tiller View Diagrams & Manuals
21A-251E000 (2007) Tiller View Diagrams & Manuals
21A-251F200 (2007) Tiller View Diagrams & Manuals
21A-240H052 (2008) Tiller View Diagrams & Manuals
21A-240J252 (2008) Tiller View Diagrams & Manuals
21A-240M052 (2008) Tiller View Diagrams & Manuals
21A-250M000 (2008) Tiller View Diagrams & Manuals
21A-250N200 (2008) Tiller View Diagrams & Manuals
21A-240M000 (2009) Tiller View Diagrams & Manuals
21A-240M029 (2009) Tiller View Diagrams & Manuals
21A-240M052 (2009) Tiller View Diagrams & Manuals
21A-240N200 (2009) Tiller View Diagrams & Manuals
21A-240N229 (2009) Tiller View Diagrams & Manuals
21A-24MB752 (2016) Tiller View Diagrams & Manuals
Bolens
21A-250H065 (2010) Walk Behind Tiller View Diagrams & Manuals
21A-250J265 (2010) Walk Behind Tiller View Diagrams & Manuals
Husky
21A-240D731 (2006) Tiller View Diagrams & Manuals
21A-240H031 (2007) Tiller View Diagrams & Manuals
21A-240J231 (2007) Tiller View Diagrams & Manuals
21A-240H031 (2008) Tiller View Diagrams & Manuals
21A-240J231 (2008) Tiller View Diagrams & Manuals
21A-240H031 (2009) Tiller View Diagrams & Manuals
21A-240J231 (2009) Tiller View Diagrams & Manuals
21A-210H031 (2010) Tiller View Diagrams & Manuals
21A-210J231 (2010) Tiller View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Lawn Mower Parts
- Cultivator Parts
This part replaces obsolete part #: 1909374, 721-04036
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Fast shipping and just what I needed
Product is as described
Guest -
June 3, 2023
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Correct part
Part was correct and was shipped very fast!
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April 21, 2023
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Oil seal
I received the part quickly and it was the correct one and everything went great I love it thank you
Guest -
October 21, 2019
Verified Purchase
Troybilt Tine Shaft Seal
Correct part. Short wait time. Glad I found this site.
Guest -
June 10, 2019
Verified Purchase
The exact part
Fit exactly as expected, excellent replacement part
Galen -
May 18, 2019
Verified Purchase
Oil Seal
Part was exactly what I wanted and appeared well made
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May 13, 2019
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Quick response to order
Easy Repair, parts were perfect for need
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April 26, 2019
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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.
Two seals were leaking oil.
Lee - June 24, 2016
👍 9 of 11 people found this instruction helpful
Tool Type
Cultivator
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Hammer, washer, and pipe to drive in the seals. emery paper
Parts Used
1. Removed wheel and tines.
2. Removed old seals.
3. Cleaned and smooth the shaft with emery paper.
4. Installed new seal by first putting a non hardening sealant on out side of shaft.
5. Next putting in the seal, by using a washer and pipe to get the seal in all the way.
2. Removed old seals.
3. Cleaned and smooth the shaft with emery paper.
4. Installed new seal by first putting a non hardening sealant on out side of shaft.
5. Next putting in the seal, by using a washer and pipe to get the seal in all the way.
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Oil leak from gear box
Layne - April 3, 2020
👍 1 of 1 people found this instruction helpful
Tool Type
Cultivator
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Adjustable Wrench
Parts Used
replaced axle seals
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Leaking oil
Michael - March 29, 2020
👍 1 of 1 people found this instruction helpful
Tool Type
Cultivator
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, 2 jaw puller
Parts Used
Removed outer tines and shear bolts. Tines were stuck so had to use a puller to remove the tine holder from shaft. Used a flat head screwdriver to pry up the seal then removed the rest of the way with needle nose pliers. Sanded shaft the reinstalled seals with a punch and hammer. Put antisieze on the shaft. Reinstalled tine holder shear bolt and out tines. Fill transmission with proper oil.
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All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
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