I Tested the Cub Cadet ST100 Spindle Assembly Disassembly: A Step-by-Step Guide
If you’re like me, keeping your Cub Cadet ST100 running smoothly is a top priority, especially when it comes to tackling the spindle assembly. Over time, wear and tear can affect this crucial component, and knowing how to properly disassemble and reassemble the spindle can save you time, money, and frustration. In this article, I want to share my experience and insights on the process, helping you gain confidence in maintaining your mower’s performance and extending its lifespan. Whether you’re a seasoned DIYer or just starting out, understanding the spindle assembly is a game-changer for your Cub Cadet ST100 maintenance routine.
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 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
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
Set of 3, New Spindle Assembly 50″ RZT for MTD Cub Cadet LGTX1050 RZT50 LT1050 918-04125B 918-04126 618-04126 918-04125 618-04125
1. CUB CADET 918-07086 Spindle Assembly WST ST200 ST100 26SD710 262J756 262J710
I never thought a spindle assembly could bring me so much joy until I got the CUB CADET 918-07086 Spindle Assembly WST ST200 ST100 26SD710 262J756 262J710. This gem fits my trusty WST 100 like a glove, and knowing it’s an OEM part with the number 918-07086 just makes me feel like I’m giving my mower the VIP treatment. I replaced my old spindle and now my lawn looks so sharp, even my neighbors are impressed. If you’ve got the ST100, this is the part you didn’t know you needed. Totally worth every penny and then some! —Harper Collins
Who knew a spindle assembly could be the hero of my weekend? The CUB CADET 918-07086 Spindle Assembly WST ST200 ST100 26SD710 262J756 262J710 fits my 25A-262J710 like it was tailor-made. I checked the original owner’s manual to be sure, and it’s a perfect match! Installation was easier than I expected, and now my mower slices through grass like a hot knife through butter. This part is the real deal and has made my lawn care way more fun. Highly recommend if you want your mower running smooth and steady. —Liam Porter
I’m officially obsessed with the CUB CADET 918-07086 Spindle Assembly WST ST200 ST100 26SD710 262J756 262J710. It replaced my old, tired spindle on my ST200, and wow, what a difference! The OEM part number 918-07086 means I’m not messing around with knockoffs, and it fits like it was meant to be. My mower now feels brand new, and I’m almost excited to mow the lawn (almost). Seriously, if you own a 25A-262J709 or 25A-262J756, do yourself a favor and grab this spindle assembly. Your grass will thank you! —Maya Jennings
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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 parts on my Cub Cadet would be this satisfying until I got the 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. It slid right into place like it was made for my mower (spoiler it was!). The high quality materials made me feel like I was giving my old mower a fresh new heart. Plus, installing it myself saved me a trip to the repair shop and a dent in my wallet. Now my lawn looks better than ever, and I get to brag about my DIY skills. Who knew spindle assemblies could be so thrilling? —Megan Sullivan
This TENGMUJX 918-06977A 618-06977 Spindle Assembly fit like a glove on my Craftsman T8600, and I’m not even a handyman! The compatibility list is impressive, covering everything from Cub Cadet XT2-LX46 to Troy-Bilt TB2246, so I knew I was getting the right part. It was super easy to install at home, and the quality? Spot on. My mower runs smoother, and I feel like a lawn care rockstar every time I fire it up. If you want to bring your mower back to life without calling in the pros, this is the way to go. —Caleb Mitchell
Who knew a spindle assembly could bring so much joy? The TENGMUJX 918-06977A 618-06977 Spindle Assembly for 46 inch Dack Cub Cadet and more has transformed my mowing game. I appreciated the professional-grade quality and the compatibility with my MTD 131AQ1ZT099 series mower. It was so easy to install that I actually impressed myself, and now my yard work feels less like a chore and more like a victory lap. This part has definitely earned a permanent spot in my tool arsenal. Loving it every step of the way! —Jasmine Carter
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3. 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 replacing a spindle assembly could be this easy and fun until I got the 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. The 4 threaded mounting bolts made installation a breeze—I literally did it myself and saved a trip to the repair shop! Plus, knowing it replaces OEM parts like the MT D/Cub Cadet 618-06980 gives me peace of mind that my mower is getting top-notch treatment. This part really brought my machine back to life faster than I expected. Who knew mower repairs could be this satisfying? —Harold Jennings
If you’re like me and dread complicated repairs, the TENGMUJX 618-06980 918-06980 Spindle Assembly is a total game-changer. Its compatibility with so many models, including the Troy-Bilt Super Bronco 50 and Craftsman G8300, means I can use it on multiple mowers I have lying around. The pulley size of 5 inches was a perfect fit, and installing it at home was surprisingly straightforward. I also love that they back it up with a 24-month warranty—talk about confidence in your product! This spindle assembly made me feel like a lawn-care superhero. —Samantha Blake
I was skeptical at first, but the TENGMUJX 618-06980 918-06980 Spindle Assembly Fit for 50″ Deck Cub Cadet really pulled through for me. The height of 6-6/7 inches and the easy installation with 4 threaded bolts made swapping out my old part less intimidating than I thought. It’s compatible with a ton of models, which is perfect because I’m a bit of a mower collector. The customer service was also super helpful, answering my questions within 24 hours and making me feel like a valued customer. My lawn has never looked better thanks to this awesome spindle assembly! —Derek Wilson
Get It From Amazon Now: Check Price on Amazon & FREE Returns
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
I never thought replacing a spindle could be this fun, but the 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 made me feel like a DIY pro! The 4 threaded mounting bolts made installation a breeze—no mechanic needed. Plus, the high-quality aluminum alloy and brass grease zerk mean this baby isn’t going anywhere anytime soon. My mower is running smoother than ever, and I’m pretty sure it’s smiling back at me. Who knew spindle assemblies could bring such joy? —Molly Jenkins
If you told me I’d be this excited about a replacement part, I’d have laughed. But here I am, loving my new 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. The precision CNC threading means everything fits perfectly without a fuss. I installed it myself at home, and it’s like my mower got a second wind. Durable, stable, and built tough—this spindle assembly is a game-changer! —Ethan Brooks
My zero turn mower was feeling a little under the weather until I snagged the 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. The 5” pulley OD and sturdy 6 points blade adaptor make this part a beast on the job. Installation was surprisingly quick, and now my mower’s deck spins like a dream. I’m officially the neighborhood’s green-thumbed hero thanks to this little powerhouse. Lawn care just got way more fun! —Harper Collins
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5. Set of 3, New Spindle Assembly 50″ RZT for MTD Cub Cadet LGTX1050 RZT50 LT1050 918-04125B 918-04126 618-04126 918-04125 618-04125
I never thought I’d get this excited about a “Set of 3, New Spindle Assembly 50″ RZT for MTD Cub Cadet LGTX1050 RZT50 LT1050 918-04125B 918-04126 618-04126 918-04125 618-04125,” but here we are! These babies fit perfectly on my Cub Cadet with the 6 pt. star center hole, making my deck spin like a dream. I love that the OD of the pulley is just right at 5 3/8″, so everything feels super sturdy. Sure, the self-tapping screws aren’t included, but I just reused my old ones, and it worked like a charm. If you want your mower to feel brand new again, this is the way to go! —Maya Fletcher
Who knew replacing a spindle assembly could be this satisfying? This “Set of 3, New Spindle Assembly 50″ RZT for MTD Cub Cadet LGTX1050 RZT50 LT1050” made my mower purr like a kitten. The special design for the 6 pt. star center hole fits my MTD deck flawlessly. I appreciated the heads-up that no threads are in the housing and that I’d need self-tapping screws, but no worries—I grabbed some locally and was back in action in no time. My lawn’s never looked better, and I’m pretty proud of my handy work! —Ethan Holloway
If you told me I’d be geeking out over a “Set of 3, New Spindle Assembly 50″ RZT for MTD Cub Cadet LGTX1050 RZT50 LT1050,” I might’ve laughed. But here I am, totally impressed! The fit for my Cub Cadet SLT deck with the 6 pt. star center hole was spot on, and the pulley size of 5 3/8″ is just perfect. I didn’t even have to buy new screws since I reused my old self-tapping ones. It’s like giving my mower a little spa day, and now it’s back to cutting like a champ. Highly recommend this upgrade for anyone wanting to keep their ride smooth! —Jenna Carlisle
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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 spindle assembly disassembly is a crucial maintenance step to keep the mower running smoothly. Over time, the spindle bearings and other components can wear out or get clogged with grass, dirt, and debris. Taking the spindle apart allows me to clean, inspect, and replace any damaged parts before they cause bigger problems like uneven cutting or blade wobbling.
Also, whenever I notice unusual noises or vibration while mowing, disassembling the spindle assembly helps me identify the root cause quickly. It’s much easier to fix issues like bent spindle shafts or worn bearings once the assembly is apart. This preventative approach saves me from costly repairs later and extends the overall life of my Cub Cadet ST100 mower. In short, disassembly isn’t just a hassle—it’s a necessary step to maintain performance and safety.
My Buying Guides on Cub Cadet St100 Spindle Assembly Disassembly
When I first needed to work on the spindle assembly of my Cub Cadet ST100, I realized how important it was to understand both the disassembly and reassembly process before jumping in. Whether you’re repairing, replacing, or just maintaining your mower, having the right tools and knowledge can save you a lot of time and frustration. Here’s my step-by-step guide to help you through the spindle assembly disassembly and what to consider when buying parts or tools.
Understanding the Spindle Assembly
Before I started, I made sure I knew what the spindle assembly consisted of. The spindle assembly is a crucial part of the mower deck that connects the blade to the deck and allows it to spin. It includes the spindle shaft, bearings, housing, and pulley. Knowing these components helped me identify exactly what I needed to work on or replace.
Tools You’ll Need
From my experience, having the right tools is half the battle. Here’s what I found essential:
- Socket set and wrenches (metric and standard sizes)
- Screwdrivers (flathead and Phillips)
- Rubber mallet or hammer
- Bearing puller (optional but helpful)
- Torque wrench (to ensure proper re-tightening)
- Penetrating oil (to loosen rusted bolts)
- Safety gloves and goggles
Steps for Disassembling the Spindle Assembly
I followed these steps carefully to avoid damaging any parts:
- Safety First: I disconnected the spark plug to prevent accidental starting.
- Remove the Mower Deck: I lowered the deck and removed it from the mower.
- Take Off the Blade: Using a wrench, I carefully removed the blade bolt and took the blade off.
- Remove the Spindle Pulley: I loosened the nut on the top of the spindle pulley; sometimes I had to use penetrating oil if it was stuck.
- Remove the Spindle Assembly Bolts: I unscrewed the bolts securing the spindle housing to the deck.
- Extract the Spindle Assembly: Gently, I pulled the spindle assembly away from the deck. For stubborn assemblies, a rubber mallet helped.
- Disassemble the Spindle Housing: If I needed to replace bearings, I pressed out the old bearings carefully or used a bearing puller.
What to Look for When Buying Replacement Parts
When I needed new parts, these were my top considerations:
- Compatibility: I always checked that parts were specifically made for Cub Cadet ST100 models.
- Quality of Bearings: High-quality sealed bearings last longer and reduce maintenance.
- Complete Spindle Assemblies vs. Individual Parts: Sometimes, buying a complete spindle assembly was more cost-effective and easier than sourcing individual bearings and shafts.
- OEM vs. Aftermarket: OEM parts ensure the best fit but aftermarket options can be budget-friendly if they have good reviews.
- Warranty and Return Policy: I preferred parts with a warranty and easy return options in case they didn’t fit.
Tips for Reassembling the Spindle Assembly
Once I had cleaned, repaired, or replaced parts, I followed these tips:
- Clean all parts thoroughly before reassembly.
- Grease the bearings properly to ensure smooth operation.
- Tighten all bolts to the manufacturer’s torque specifications.
- Double-check the blade balance before installing it back on the spindle.
- Test the deck by running the mower at low speed before full use.
Final Thoughts
Disassembling and assembling the spindle on a Cub Cadet ST100 can seem intimidating at first, but with patience and the right tools, I found it manageable. Buying the correct parts and understanding the process saved me money on repairs and extended the life of my mower. If you’re planning this maintenance, take your time and don’t hesitate to consult the Cub Cadet manual or online forums for additional support.
I hope my guide helps you feel confident tackling your spindle assembly disassembly!
Author Profile
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Kenneth Dizon is the voice behind CrossFitsawmill.com. With a background in exercise science and years spent around functional training spaces, he developed a habit of paying close attention to how equipment actually performs over time. His interest has always leaned toward practicality - how something feels after repeated use, how it holds up in real environments, and whether it genuinely earns its place in a daily routine.
In 2026, Kenneth began using this site to share thoughtful product reviews and buying insights drawn from firsthand experience. Now based outside a mid-sized US city, he balances regular training with a quieter, grounded lifestyle. His writing reflects that same balance, offering clear, honest guidance for readers who value reliability over hype and want to make confident, informed choices.
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