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Blade Driver Asm

Part Number: 106-3987
ToroLawn Boy
Availability: 25+ in stock
Price: $32.31
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Product Information
Manufacturer: Toro, Lawn Boy
Product Number: 106-3987
Classification: Part
Weight: 0.83 lbs.
Shipping: Ships Worldwide
Description:
The metal blade driver assembly attaches to the blade with the guide belt wrapped around it. The spacer will go inside the driver. This part is used in lawn mowers. If the lawn mower wheels will not turn you may need to replace the blade driver. A wrench will be needed to replace this part if it becomes damaged. The driver is available as an individual replacement item and is an original Toro part.
Frequently Purchased With
Compatibility

This part is compatible with the following machines:

Toro
20001 (240000001-240999999)(2004) Lawn Mower
20003 (250000001-250999999)(2005) Lawn Mower
20003 (260000001-260999999)(2006) Lawn Mower
20005 (250000001-250999999)(2005) Lawn Mower
20005 (260000001-260999999)(2006) Lawn Mower
20007 (240000001-240999999)(2004) Lawn Mower
20008 (230000001-230999999)(2003) Lawn Mower
20008 (240000001-240999999)(2004) Lawn Mower
20009 (220000001-220999999)(2002) Lawn Mower
20009 (230000001-230999999)(2003) Lawn Mower
20009 (240000001-240999999)(2004) Lawn Mower
20009 (250000001-250999999)(2005) Lawn Mower
20009 (260000001-260999999)(2006) Lawn Mower
20009 (270000001-270999999)(2007) Lawn Mower
20012 (220000001-220300000)(2002) Lawn Mower
20012 (220300001-220999999)(2002) Lawn Mower
20012 (230000001-230999999)(2003) Lawn Mower
20012 (240000001-240999999)(2004) Lawn Mower
20012 (250000001-250999999)(2005) Lawn Mower
20012 (260000001-260999999)(2006) Lawn Mower
20013 (220000001-220300000)(2002) Lawn Mower
20013 (220300001-220999999)(2002) Lawn Mower
20013 (230000001-230999999)(2003) Lawn Mower
20013 (240000001-240999999)(2004) Lawn Mower
20013 (250000001-250999999)(2005) Lawn Mower
20013 (260000001-260999999)(2006) Lawn Mower
20014 (220000001-220300000)(2002) Lawn Mower
20014 (220300001-220999999)(2002) Lawn Mower
20014 (230000001-230999999)(2003) Lawn Mower
20016 (220000001-220300000)(2002) Lawn Mower
20016 (220300001-220999999)(2002) Lawn Mower
20016 (230000001-230999999)(2003) Lawn Mower
20016 (240000001-240999999)(2004) Lawn Mower
20016 (250000001-250999999)(2005) Lawn Mower
20016 (260000001-260999999)(2006) Lawn Mower
20017 (220000001-220300000)(2002) Lawn Mower
20017 (220300001-220999999)(2002) Lawn Mower
20017 (230000001-230999999)(2003) Lawn Mower
20017 (240000001-240999999)(2004) Lawn Mower
20017 (250000001-250999999)(2005) Lawn Mower
20017 (260000001-260999999)(2006) Lawn Mower
20018 (220000001-220300000)(2002) Lawn Mower
20018 (220300001-220999999)(2002) Lawn Mower
20018 (230000001-230999999)(2003) Lawn Mower
20019 (230000001-230999999)(2003) Lawn Mower
20031 (240000001-240999999)(2004) Lawn Mower
20036 (230000001-230999999)(2003) Lawn Mower
20036 (240000001-240999999)(2004) Lawn Mower
20037 (230000001-230999999)(2003) Lawn Mower
20037 (240000001-240999999)(2004) Lawn Mower
20038 (230000001-230999999)(2003) Lawn Mower
20038 (240000001-240999999)(2004) Lawn Mower
20039 (230000001-230999999)(2003) Lawn Mower
20039 (240000001-240999999)(2004) Lawn Mower
20041 (250000001-250999999)(2005) Lawn Mower
20049 (250000001-250999999)(2005) Lawn Mower
20051 (240000001-240999999)(2004) Lawn Mower
20053 (270000001-270999999)(2007) Lawn Mower
20053 (260000001-260999999)(2006) Lawn Mower
20053 (250000001-250999999)(2005) Lawn Mower
20054 (250000001-250999999)(2005) Lawn Mower
20054 (260000001-260999999)(2006) Lawn Mower
20054 (270000001-270999999)(2007) Lawn Mower
20055 (250000001-250999999)(2005) Lawn Mower
20055 (260000001-260999999)(2006) Lawn Mower
20055 (270000001-270999999)(2007) Lawn Mower
20057 (250000001-250999999)(2005) Lawn Mower
20057 (260000001-260999999)(2006) Lawn Mower
20062 (270000001-270999999)(2007) Lawn Mower
20064 (270000001-270999999)(2007) Lawn Mower
20064 (280000001-280070155)(2008) Lawn Mower
20064 (280070156-280999999)(2008) Lawn Mower
20065 (270000001-270999999)(2007) Lawn Mower
20065 (280000001-280072441)(2008) Lawn Mower
20065 (280072442-280999999)(2008) Lawn Mower
20066 (270000001-270999999)(2007) Lawn Mower
20066 (280000001-280999999)(2008) Lawn Mower
20067 (270000001-270999999)(2007) Lawn Mower
20067 (280000001-280999999)(2008) Lawn Mower
20069 (270000001-270999999)(2007) Lawn Mower
20070 (260000001-260999999)(2006) Lawn Mower
20071 (270000001-270999999)(2007) Lawn Mower
20071A (270000001-270999999)(2007) Lawn Mower
20072 (270000001-270999999)(2007) Lawn Mower
20072A (270000001-270999999)(2007) Lawn Mower
20073 (270000001-270999999)(2007) Lawn Mower
20073A (270000001-270999999)(2007) Lawn Mower
20074 (270000001-270999999)(2007) Lawn Mower
20074A (270000001-270999999)(2007) Lawn Mower
20079 (260000001-260999999)(2006) Lawn Mower
20086 (280000001-280011041)(2008) Lawn Mower
20086 (280011042-280999999)(2008) Lawn Mower
20087 (280000001-280009000)(2008) Lawn Mower
20087 (280009001-280999999)(2008) Lawn Mower
20089 (280000001-280999999)(2008) Lawn Mower
20090 (280000001-280999999)(2008) Lawn Mower
20090 (290000001-290999999)(2009) Lawn Mower
20090C (280000001-280999999)(2008) Lawn Mower
20090C (290000001-290999999)(2009) Lawn Mower
20091 (280000001-280999999)(2008) Lawn Mower
20091C (280000001-280999999)(2008) Lawn Mower
20092 (280000001-280999999)(2008) Lawn Mower
20092 (290000001-290999999)(2009) Lawn Mower
20092 (310000001-310020057)(2010) Lawn Mower
20092 (310020238-310999999)(2010) Lawn Mower
20092C (280000001-280999999)(2008) Lawn Mower
20092C (290000001-290999999)(2009) Lawn Mower
20092C (310000001-310999999)(2010) Lawn Mower
20094 (270000001-270999999)(2007) Lawn Mower
20095 (280000001-280999999)(2008) Lawn Mower
20095 (290000001-290999999)(2009) Lawn Mower
20095 (310000001-310004268)(2010) Lawn Mower
20095 (310004923-310999999)(2010) Lawn Mower
20095C (280000001-280999999)(2008) Lawn Mower
20095C (290000001-290999999)(2009) Lawn Mower
20095C (310000001-310999999)(2010) Lawn Mower
20096 (270000001-270999999)(2007) Lawn Mower
20098 (270000001-270999999)(2007) Lawn Mower
20099 (280000001-280999999)(2008) Lawn Mower
20099 (290000001-290999999)(2009) Lawn Mower
20099 (310000001-310000309)(2010) Lawn Mower
20110 (280000001-280001676)(2008) Lawn Mower
20110 (290000001-290999999)(2009) Lawn Mower
20111 (280000001-280001951)(2008) Lawn Mower
20111 (280001952-280999999)(2008) Lawn Mower
20111 (290000001-290999999)(2009) Lawn Mower
20112 (280000001-280999999)(2008) Lawn Mower
20112 (290000001-290999999)(2009) Lawn Mower
20113 (280000001-280999999)(2008) Lawn Mower
20113 (290000001-290999999)(2009) Lawn Mower
20330 (290000001-290999999)(2009) Lawn Mower
20330 (310000001-310008917)(2010) Lawn Mower
20330 (310008918-310999999)(2010) Lawn Mower
20330C (290000001-290999999)(2009) Lawn Mower
20330C (310000001-310999999)(2010) Lawn Mower
20331 (290000001-290999999)(2009) Lawn Mower
20331 (310000001-310006219)(2010) Lawn Mower
20331 (310006220-310999999)(2010) Lawn Mower
20331C (290000001-290999999)(2009) Lawn Mower
20331C (310000001-310999999)(2010) Lawn Mower
20332 (290000001-290999999)(2009) Lawn Mower
20332 (310000001-310999999)(2010) Lawn Mower
20332C (290000001-290999999)(2009) Lawn Mower
20332C (310000001-310999999)(2010) Lawn Mower
20334 (290000001-290999999)(2009) Lawn Mower
20334 (310000001-310999999)(2010) Lawn Mower
20334C (290000001-290999999)(2009) Lawn Mower
20334C (310000001-310999999)(2010) Lawn Mower
20338 (310000001-310999999)(2010) Lawn Mower
20350 (290000001-290999999)(2009) Lawn Mower
Expand the 150+ compatible machines
Products Compatibility

This item works with the following types of products:

  • • Lawn Mower
Questions & Answers

No questions have been asked yet
Repair Instructions: Submitted by Customers Like You
11 of 11 people found this instruction helpful
Tool Type:
Lawn Mower
Parts Used:
Blade Driver Asm - 106-3987
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
Socket set, Dead Blow Hammer
Blade driver arm split and lost keyway structure.
Remove blade. Tap off old blade driver arm. Place keyway and tap blade driver arm onto shaft. Bolt blade on. You are ready to mow.
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2 of 2 people found this instruction helpful
Tool Type:
Lawn Mower
Parts Used:
Blade Driver Asm - 106-3987
Repair Difficulty:
Hard
Time Spent Repairing:
15-30 minutes
Tools Used:
Socket set, Gear puller, propane torch
Worn drive belt pulley (made belt replacement ineffective).
1. Remove belt guard, blade, and belt.
2. Attach gear puller to blade driver assembly (pulley) utilize the blade bolt as a place to set the puller center button.
3. Apply pressure with a wrench to the puller. The puller may or may not be adequate to remove the pulley. In which case apply heat to the pulley assembly just on the sleeve portion of the assembly in front of the pulley. Keep the heat away from the crankcase to avoid heat damage to the seal.
4. Upon removal of the old assembly, you will find a special spacer inside of it required for the new assembly. It may fall out or you may have to tap it out, but remember you will need it.
5. Reverse the procedure for assembling, use a little anti-seize on the crankshaft and use the blade bolt to draw the driver assembly onto the crankshaft.
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3 of 4 people found this instruction helpful
Tool Type:
Lawn Mower
Parts Used:
Blade Driver Asm - 106-3987
Pulley-Half - 107-3862
V-Belt - 107-3922
Cable-Traction - 107-3917
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver, Socket set, Gear puller
Self drive was not working properly.
1. Took the old parts off.
2. Put the new ones on.
3. Had to use a gear puller to remove blade drive assembly.
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Tool Type:
Lawn Mower
Parts Used:
Blade Driver Asm - 106-3987
Spacer-Driver - 106-3999
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
Socket set, 32oz hammer
Blade drive assembly
Ruptured drive assembly after running over a well hidden tree stump. Quarter size hole where the keyway used to be. Had to beat the thing with a 32oz
hammer like a mad because of short stroke clearance. ( yes I tried prying with 2x4 and crowbar, dont own a puller big enough). Upon removal I inspected and cleaned the shaft then lubricated it with greaseless spray, inserted the spacer into new drive and aligned the key way and it pushed on about an inch before it stopped cold, placed 2x4 on drive and hit it with aforementioned 32oz hammer like it owed me money, and drive slid right on. Hooked belt and installed blade in the usual way and righted the mower. Let the mower sit for a couple of hours to allow oil to settle, checked oil and gas then cut the grass. BTW pull the plug wire whenever I work on blade end stuff and use cardboard to catch any fluid when turned on side. All in all a $42 repair job on an 8 year old mower beats $400 for a new one.
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Tool Type:
Lawn Mower
Parts Used:
Blade Driver Asm - 106-3987
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Pliers
Shield was old and worn and broken
Removed old rod shield with a pair of pliers then removed the trailing shield. Then replaced the trailing shield and inserted the new rod shield threading it through the trailing shield. Less than 5 minutes only used a pair of pliers.
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Tool Type:
Lawn Mower
Parts Used:
Blade Driver Asm - 106-3987
V-Belt - 91-2258
Repair Difficulty:
Medium
Time Spent Repairing:
1-2 hours
Tools Used:
Pliers, Socket set, Wrench Set
Lawn mower was not self-propelling properly
replaced the two parts, then found it was actually the gears on the drive shaft that was causing the problem.
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Tool Type:
Lawn Mower
Parts Used:
Blade Driver Asm - 106-3987
Recycling Blade - 133-8183-03
Repair Difficulty:
Easy
Time Spent Repairing:
30-60 minutes
Tools Used:
Socket set, HAMMER TO REMOVE OLD DRIVER ADAPTER
BLADE DRIVER ADAPTER NEEDED REPLACED ALONG WITH A NEW CUTTING BLADE
PARTS ORDERED FIT PERFECTLY, AFTER REMOVAL OF OLD DRIVER ADAPTER THE NEW PART TAPPED ON THE DRIVE SHAFT WITH THE WELDED IN KEYWAY.. AFTER REPLACING THE BLADE, THE MOWER WAS RETURNED TO IT'S FORMER GLORY AND READY FOR THE NEW CUTTING SEASON
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Tool Type:
Lawn Mower
Parts Used:
Blade Driver Asm - 106-3987
Mulching Blade (22-Inch) - 131-4547-03
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Socket set
Struck a rock and ruined the original blade and drive coupling keyway hub for the front wheel drive
Removed and replaced the mower blade and front wheel drive coupling
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Tool Type:
Lawn Mower
Parts Used:
Blade Driver Asm - 106-3987
Spacer-Driver - 106-3999
Bolt-Blade - 125-2466
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver, Wrench Set
Blade driver became loose because of a loose bolt and damaged the blade driver assembly and blade bolt.
The new parts were installed (slipped on) very easily. The lawn mower now works and I just mowed the front and back yards.
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1 of 2 people found this instruction helpful
Tool Type:
Lawn Mower
Parts Used:
Blade Driver Asm - 106-3987
Spacer-Driver - 106-3999
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Socket set
Blade driver asm broke. Went to sharpen lawn mower and realized spacer-driver was broke and blade driver assembly was broke.
1. Put new parts on with the blade that I had sharpened. Changed oil. Every thing went fine.
Parts diagram for replacement parts was a great help.
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Reviews
5
Average Rating (out of 5):
6 Reviews
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  • Easy fix
    Parts fit perfectly lawnmower works great.
    Guest - July 20, 2022 Verified Purchase
    Perfect fit. Back in in working order
    Everything was as expected. No trouble installing perfect fit parts. Shipping box was poorly secured. Open at one end with poor taping. Lucky all parts still inside.
    Guest - May 15, 2021 Verified Purchase
    Replacement of blade driver arm assembly
    Being technically challenged, I found the E Replacement parts site was user friendly. Found the necessary part and chose to call in the order . The part arrived in the prescribed 3 day delivery time. My Toro was back in business in about 45 minutes.
    Guest - April 9, 2020 Verified Purchase
    Mower Repair - DIY
    The mower was working okay(?) but making a clanging noise at start up and stop. Took it to my preferred small engine shop and was told it was a warped shaft and not worth the cost to repair. I took the thing apart and found the drive pulley was the culprit. $42 dollars and about one hour later, it was as good as new. I expect to get a few more years service out of the mower!
    Guest - March 11, 2020 Verified Purchase
    crankshaft hub
    arrived quickly and fit like original!
    Guest - December 14, 2019 Verified Purchase
    Broken Blade Mount
    I was truly impressed how well these parts came together to complete a simple and straight forward repair on my Toro self propelled lawn mower. $40 in parts probably saved me $140 in labor/parts had I taken my mower to a Lawn Equipment repair shop. You guys will be my first stop for future repair parts in the future.
    Steven - May 26, 2019 Verified Purchase
    Verified Purchase
    eReplacementParts Team
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    • Most Recent
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    Product Information
    Manufacturer: Toro, Lawn Boy
    Product Number: 106-3987
    Classification: Part
    Weight: 0.83 lbs.
    Shipping: Ships Worldwide
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