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.
Sorry, we couldn't find any existing reviews that matched. Try using some different or simpler keywords.
★★★★★
★★★★★
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
★★★★★
★★★★★
crankshaft hub
arrived quickly and fit like original!
Guest - December 14, 2019
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
★★★★★
★★★★★
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
★★★★★
★★★★★
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
★★★★★
★★★★★
Easy fix
Parts fit perfectly lawnmower works great.
Guest - July 20, 2022
Verified Purchase
★★★★★
★★★★★
easy repair
No review
Guest - July 26, 2025
Verified Purchase
Questions & Answers
?
Our customer Service team is at the ready daily to answer your part and product questions.
We're sorry, but our Q&A experts are temporarily unavailable.
Please check back later if you still haven't found the answer you need.
Ask our Team
We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
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 lubri
... Read morecated 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.
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
... Read more 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.
Read less
Did you find this story helpful?
Thank you for voting!
Blade driver asm broke. Went to sharpen lawn mower and realized spacer-driver was broke and blade driver assembly was broke.
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.
Did you find this story helpful?
Thank you for voting!
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
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
✖
Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
(2012)_WW_1.gif "Part Location Diagram of 106-3987 Toro Blade Driver Asm")
(2012)_WW_1.gif "Part Location Diagram of 106-3987 Toro Blade Driver Asm")
