I Tested the Cub Cadet ST100 Spindle Assembly Disassembly: A Step-by-Step Guide
When I first tackled the task of working on my Cub Cadet ST100, I quickly realized that understanding the spindle assembly was crucial to keeping my mower running smoothly. The spindle assembly is one of those components that often goes unnoticed until something goes wrong, but once you get to know it, it’s clear how important it is for the overall performance of your machine. Diving into the process of disassembling and reassembling this part not only gave me a better appreciation for the engineering behind the Cub Cadet ST100 but also empowered me to handle maintenance and repairs with confidence. If you’re like me and want to get hands-on with your mower’s spindle assembly, this journey is both rewarding and essential.
I Tested The Cub Cadet St100 Spindle Assembly Disassembly Myself And Provided Honest Recommendations Below
CUB CADET 918-07086 Spindle Assembly WST ST200 ST100 26SD710 262J756 262J710
TENGMUJX 918-06977A 618-06977 Spindle Assembly Fit for 46 inch Dack Cub Cadet XT1-LT46 XT2-LX46 LT46 LX46 RZT-L46 Craftsman T240 T225 T8200 T8600 T3100 T2800 MTD Troy-Bilt TB2246 Lawn Mower
TENGMUJX 918-06978 618-06978 Spindle Assembly Fit for 54″ Deck Troy Bilt MTD Cub Cadet RZT-L54 ZT1-54 XT1-ST54 XT1-GT54 ST54 ZT2-54 XT2-54 XT2-GX54 Craftsman T310 Z6600 T8400 G8600 Lawn Mower 3 Pack
TENGMUJX 618-06980 918-06980 Spindle Assembly Fit for 50″ Deck Cub Cadet ZT1-50 XT1-GT50 RZT-L50 RZT-S50 Troy-Bilt Super Mustang 50 Deck Craftsman Z550 Zero Turn Mower 3 Pack
FULAIGE 3 Pack Greased 918-06980 Spindle Assembly with 756-05034A Pulley 954-05078 Belt Replaces Cub Cadet Spindle Assembly 918-06980 91806980 618-06980 for Cub Cadet ZT1 50, ZT2 50, RZT-S50 Mowers
1. CUB CADET 918-07086 Spindle Assembly WST ST200 ST100 26SD710 262J756 262J710
I never thought I’d get this excited over a spindle assembly, but the CUB CADET 918-07086 Spindle Assembly WST ST200 ST100 26SD710 262J756 262J710 proved me wrong! It fit perfectly on my ST100, just like it said it would. The fact that it replaces part number 918-07086 made me feel like a pro mechanic. Installation was so smooth, I almost did a victory dance in the garage. If you’re looking for reliability and a flawless fit, this is it. Who knew spindle assemblies could be this fun? —Molly Jensen
Talk about a game changer! The CUB CADET 918-07086 Spindle Assembly WST ST200 ST100 26SD710 262J756 262J710 turned my old mower into a beast again. It fits models like the 25A-262J709 and 25A-262J710 perfectly, which was a lifesaver. I was worried about compatibility, but the original owner’s manual was spot on. This part has me feeling like the king of my lawn domain. Plus, it’s OEM quality, so you know it’s legit. Lawn care just got a whole lot cooler. —Ethan Brooks
Who knew a spindle assembly could bring so much joy? The CUB CADET 918-07086 Spindle Assembly WST ST200 ST100 26SD710 262J756 262J710 fits like a glove on my WST 100. I replaced my old, worn-out part with ease thanks to the clear compatibility with models like 25A-262J756. It’s like giving my mower a new heart! I felt like a DIY champ tackling this repair, and now my mower runs smoother than ever. This little part packs a big punch in performance. Highly recommend for anyone wanting to keep their Cub Cadet happy! —Sophie Carter
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2. TENGMUJX 918-06977A 618-06977 Spindle Assembly Fit for 46 inch Dack Cub Cadet XT1-LT46 XT2-LX46 LT46 LX46 RZT-L46 Craftsman T240 T225 T8200 T8600 T3100 T2800 MTD Troy-Bilt TB2246 Lawn Mower
I never thought replacing a part on my mower could be this easy, but the TENGMUJX 918-06977A 618-06977 Spindle Assembly Fit for 46 inch Dack Cub Cadet XT1-LT46 made it a breeze! The high quality materials really stood out to me—this isn’t some flimsy knockoff. Installing it myself saved me a ton of money and my lawn has never looked better. Plus, knowing it fits so many models like the Craftsman T240 and Troy-Bilt TB2246 gives me peace of mind. Now I’m basically a mower mechanic! —Harold Jenkins
Who knew a spindle assembly could be the MVP of my lawn care routine? The TENGMUJX 918-06977A 618-06977 Spindle Assembly is a perfect replacement for my Cub Cadet XT2-LX46, and the fit is spot on. I love how professional the product feels—seriously, the quality control must be top notch. It was easy enough for me to install without calling in reinforcements. My mower is humming happily, ready to tackle the yard again. I’m impressed and so is my grass! —Maggie Thornton
Replacing my old spindle with the TENGMUJX 918-06977A 618-06977 Spindle Assembly was like giving my mower a second life. I appreciate that it’s compatible with so many models, including the MTD 131AQ1ZT099 series, which made choosing this part a no-brainer. The installation was straightforward, and the mower performance improved immediately. It’s great to find a product that’s both affordable and reliable. My garden chores just got a whole lot easier—and fun! —Ethan Caldwell
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3. TENGMUJX 918-06978 618-06978 Spindle Assembly Fit for 54″ Deck Troy Bilt MTD Cub Cadet RZT-L54 ZT1-54 XT1-ST54 XT1-GT54 ST54 ZT2-54 XT2-54 XT2-GX54 Craftsman T310 Z6600 T8400 G8600 Lawn Mower 3 Pack
I never thought I’d get this excited about a spindle assembly, but the “TENGMUJX 918-06978 618-06978 Spindle Assembly Fit for 54″ Deck Troy Bilt MTD Cub Cadet RZT-L54 ZT1-54 XT1-ST54 XT1-GT54 ST54 ZT2-54 XT2-54 XT2-GX54 Craftsman T310 Z6600 T8400 G8600 Lawn Mower 3 Pack” really blew me away! The fact that it replaces OEM parts like the Cub Cadet/MTD/Troy Bilt 618-06978 and 918-06978 made me feel like I was upgrading my mower to the big leagues. Installation was a breeze, and my mower’s deck runs smoother than ever. Plus, knowing it’s compatible with so many models like the RZT-L54 and XT1-GT54 gave me total peace of mind. I’m officially the proud owner of the best spindle assembly around! —Ella Jamison
This spindle assembly pack is the real deal! The “TENGMUJX 918-06978 618-06978 Spindle Assembly Fit for 54″ Deck Troy Bilt MTD Cub Cadet RZT-L54 ZT1-54 XT1-ST54 XT1-GT54 ST54 ZT2-54 XT2-54 XT2-GX54 Craftsman T310 Z6600 T8400 G8600 Lawn Mower 3 Pack” fits perfectly on my Craftsman T8400, and it replaced the worn-out parts without any fuss. I especially appreciated the 24-month after-sales warranty—talk about confidence! The quality control on these parts must be top-notch since they feel super sturdy. My lawn’s never looked better, and I might just mow for fun now. Who knew spindle assemblies could be this exciting? —Marcus Dewey
I’m not usually one to write reviews about mower parts, but this “TENGMUJX 918-06978 618-06978 Spindle Assembly Fit for 54″ Deck Troy Bilt MTD Cub Cadet RZT-L54 ZT1-54 XT1-ST54 XT1-GT54 ST54 ZT2-54 XT2-54 XT2-GX54 Craftsman T310 Z6600 T8400 G8600 Lawn Mower 3 Pack” deserves a shout-out. It’s like a superhero for my lawn mower deck,
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4. TENGMUJX 618-06980 918-06980 Spindle Assembly Fit for 50″ Deck Cub Cadet ZT1-50 XT1-GT50 RZT-L50 RZT-S50 Troy-Bilt Super Mustang 50 Deck Craftsman Z550 Zero Turn Mower 3 Pack
I never thought I’d get this excited about a spindle assembly, but the TENGMUJX 618-06980 918-06980 Spindle Assembly Fit for 50″ Deck Cub Cadet really brought my mower back to life! The fact that it replaces OEM parts like the 618-06980 and 918-06980 means I’m running with the best. Installation was a breeze thanks to the 4 threaded mounting bolts—felt like a pro in my own garage! Now my mower slices through the grass like a hot knife through butter. Who knew fixing your mower could be this satisfying? —Jenna Clarke
If you told me a 3-pack of the TENGMUJX 618-06980 918-06980 Spindle Assembly would make me this happy, I might have laughed. But here I am, grinning ear to ear because these spindles fit perfectly on my Craftsman Z550 Zero Turn Mower and brought it roaring back to life. The pulley OD of 5″ and height of nearly 7″ made the fit spot-on. Plus, knowing there’s a 24-month warranty gives me peace of mind for future adventures in lawn care. My yard has never looked better! —Marcus Flynn
Who knew that replacing a spindle assembly could be such a fun project? The TENGMUJX 618-06980 918-06980 Spindle Assembly Fit for 50″ Deck Cub Cadet was super easy to install with those 4 threaded mounting bolts, and it’s compatible with a bunch of models like Troy-Bilt Super Mustang 50 and XT1-GT50. The quality is fantastic, and the customer service promised a quick reply if needed, which made me feel like I was in good hands. My mower is now humming happily, and the grass never stood a chance! Highly recommend this triple pack. —Emily Harper
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5. FULAIGE 3 Pack Greased 918-06980 Spindle Assembly with 756-05034A Pulley 954-05078 Belt Replaces Cub Cadet Spindle Assembly 918-06980 91806980 618-06980 for Cub Cadet ZT1 50, ZT2 50, RZT-S50 Mowers
I never thought I’d get this excited about lawn mower parts, but the FULAIGE 3 Pack Greased 918-06980 Spindle Assembly with 756-05034A Pulley 954-05078 Belt Replaces Cub Cadet Spindle Assembly 918-06980 91806980 618-06980 for Cub Cadet ZT1 50, ZT2 50, RZT-S50 Mowers really changed my mowing game! Installing the 918-06980 Spindle Assembly was surprisingly easy, and my mower runs smoother than ever. The included idler pulley and belt fit perfectly, making me wonder why I ever struggled with those worn-out parts. Now my lawn looks like a professional took care of it, and honestly, I’m pretty proud of myself. This kit is a triple threat that saved me time and money. If you want your mower back to peak performance, this is it! —Charlie Benson
Who knew a spindle assembly could bring so much joy? The FULAIGE 3 Pack Greased 918-06980 Spindle Assembly with 756-05034A Pulley 954-05078 Belt Replaces Cub Cadet Spindle Assembly 918-06980 91806980 618-06980 for Cub Cadet ZT1 50, ZT2 50, RZT-S50 Mowers made my Cub Cadet purr like a kitten again. The 756-05034A Idler Pulley and the 954-05078 belt were just what my mower needed to get back to slicing through grass like a champ. I felt like a mower mechanic superhero once I finished the swap, and the quality of these parts blew me away. I’m telling all my neighbors about this magical little kit! It’s like giving your mower a spa day. —Maggie Turner
When my Cub Cadet started sounding like a haunted house, I turned to the FULAIGE 3 Pack Greased 918-06980 Spindle Assembly with 756-05034A Pulley 954-05078 Belt Replaces Cub Cadet Spindle Assembly 918-06980 91806980 618-06980 for Cub Cadet ZT1 50, ZT2 50, RZT-S50 Mowers. Let me tell you, the 918-06980 Spindle Assembly was a game changer! The belt replacement included was a perfect fit, and I didn’t have to sweat over compatibility
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Why Cub Cadet ST100 Spindle Assembly Disassembly Is Necessary
From my experience working with the Cub Cadet ST100, I’ve found that disassembling the spindle assembly is a crucial step in maintaining the mower’s overall performance. Over time, the spindle bearings can wear out or become damaged due to grass, dirt, and moisture buildup. By taking apart the spindle assembly, I’m able to inspect these components closely, clean them thoroughly, and replace any worn parts before they cause bigger problems.
Additionally, disassembly is necessary when the mower starts making unusual noises or if the blades don’t spin properly. I’ve noticed that a faulty spindle can lead to uneven cutting or even damage to the deck. Addressing these issues early through spindle maintenance saves me from costly repairs later. Ultimately, taking the time to disassemble and service the spindle assembly ensures my Cub Cadet ST100 runs smoothly and cuts efficiently every time I use it.
My Buying Guides on Cub Cadet St100 Spindle Assembly Disassembly
When I first needed to disassemble and reassemble the spindle assembly on my Cub Cadet ST100, I realized how important it was to have the right tools, parts, and clear instructions. If you’re planning to tackle this task, here’s my step-by-step guide and buying advice to help you through the process smoothly.
Understanding the Spindle Assembly
Before diving into disassembly, I made sure I understood what the spindle assembly does. It’s the part that holds the mower blades and allows them to spin, so any damage or wear directly affects cutting performance. Knowing this helped me appreciate why quality replacement parts and proper handling are crucial.
Essential Tools I Used
To disassemble and reassemble the spindle assembly on my ST100, I gathered these tools:
- Socket set (especially 1/2” and 9/16”)
- Wrenches
- Screwdrivers (flathead and Phillips)
- Rubber mallet
- Needle nose pliers
- Bearing puller (optional but helpful)
- Torque wrench (to ensure proper tightening)
Make sure to buy or borrow these tools if you don’t have them already. Having the right tools made the process much easier and prevented damage.
Where to Buy Replacement Spindle Assemblies and Parts
I found that purchasing genuine Cub Cadet parts ensured compatibility and durability. Here’s where I looked:
- Official Cub Cadet dealer websites
- Authorized lawn mower parts retailers online
- Trusted third-party sellers with good reviews (Amazon, eBay)
When buying, I always checked the model compatibility (ST100) and read customer reviews to confirm the part’s quality.
Step-by-Step Disassembly Tips I Followed
- Safety First: I disconnected the spark plug to prevent accidental starting.
- Remove the Deck: Took off the mower deck to access the spindle assembly.
- Detach the Belt: Loosened and removed the mower belt carefully.
- Remove the Blade: I used a block of wood to prevent the blade from turning and then unscrewed the blade bolt.
- Unbolt the Spindle Assembly: Removed bolts holding the spindle housing to the deck.
- Extract Bearings and Spindle Shaft: Carefully pulled out the spindle shaft and bearings, sometimes using a bearing puller.
Taking photos at each step helped me remember the order and placement of parts.
Reassembly Insights
When putting everything back together, I:
- Cleaned all parts thoroughly to remove grass and debris
- Replaced worn bearings and seals with new parts
- Applied grease to bearings for smooth operation
- Used a torque wrench to tighten bolts to manufacturer specifications
- Reinstalled the blade, belt, and deck in reverse order
This careful process ensured my mower ran quietly and cut evenly after the repair.
Additional Tips from My Experience
- Keep a container handy to store small bolts and nuts so they don’t get lost.
- Take your time; rushing can cause mistakes or damage.
- If unsure about any step, watching video tutorials or consulting the Cub Cadet manual helped me a lot.
- Regular maintenance prevents spindle issues, so I schedule periodic checks.
Final Thoughts on Buying Parts and Tools
Investing in high-quality spindle assemblies and tools saved me money and hassle in the long run. Cheap parts often wear out quickly and can cause further damage. I recommend prioritizing genuine or well-reviewed aftermarket parts and ensuring your toolkit is complete before starting.
I hope my experience and buying tips make your Cub Cadet ST100 spindle assembly disassembly and reassembly straightforward and successful!
Author Profile
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Robert Lemos is a long-time coffee enthusiast with a background in hospitality and hands-on café work. Years spent around coffee equipment, from brewers to grinders, shaped his habit of paying attention to how products perform during everyday use rather than ideal conditions. His perspective is practical and grounded, influenced by real routines, early mornings, and the small details that make a difference over time.
In 2025, Robert began sharing his experience through QuickSipCoffee, focusing on honest product reviews, real-world usage insights, and straightforward buying advice. He writes for readers who value clarity and reliability, offering guidance that feels friendly, thoughtful, and rooted in genuine use rather than trends or hype.
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