732-04927 732-05549 Lawn Tractor Extension Spring for MTD Crafstman Cub Cadet LGT1050 LGTX1050 LTX1050KW Pro Z 100 RZT L46 50 54 2 pcs Review

Overview

This isn’t a mower—it’s a pair of genuine OEM replacement extension springs (part numbers 732-04927 and 732-05549) designed for MTD, Craftsman, Cub Cadet, and select Pro Z 100 series zero-turn and lawn tractors. If your deck won’t engage, the belt keeps slipping, or your blades are dragging, these springs are the fix. They’re built for owners of LGT1050, LGTX1050, LTX1050KW, RZT L46/50/54 models who need a reliable, drop-in solution to restore deck lift and belt tension without guesswork.

Who Should Buy This

• Owners of aging MTD/Cub Cadet/Craftsman tractors (5-10 years old) – These springs are the most common failure point on decks with stamped steel housings. If your deck sags or the belt pops off during heavy cutting, this is your part.
• DIYers who hate “universal” parts – Genuine OEM means no trimming, no bending, no cursing. You get the exact spring rate and hook geometry that matches your deck’s pivot points.
• Zero-turn owners with Pro Z 100 or RZT models – These machines put serious stress on deck lift springs. If you’re mowing rough terrain or thick grass, these springs maintain consistent belt tension better than aftermarket alternatives.
• Anyone restoring a tractor they bought used – A set of fresh springs is cheap insurance. Replace both sides (even if only one is broken) to avoid uneven deck wear and belt misalignment.

Key Features Breakdown

Genuine OEM Fitment – These aren’t Chinese knockoffs. They’re stamped with MTD/Cub Cadet part numbers and match the factory spring rate exactly. On a 54-inch deck, the wrong spring tension can cause the belt to ride too high or too low, leading to premature pulley wear. These eliminate that risk.

Two Springs Per Pack – Lawn tractor decks use two extension springs—one per side. Replacing them as a pair ensures balanced tension. If you only swap one, the deck will tilt slightly, scalping your lawn on uneven ground. This pack saves you a second trip to the dealer.

Corrosion-Resistant Finish – The black oxide coating isn’t just for looks. These springs sit inches from wet grass clippings and chemical fertilizers. A cheaper zinc-plated spring will rust and snap within two seasons. This coating holds up for 4-5 years in humid climates.

Precise Hook Geometry – The hooks aren’t just bent loops. They’re angled to clip securely into stamped metal deck brackets without slipping off during operation. Generic springs with open loops can pop loose mid-mow, dropping your deck into the grass.

Compatible with 42" to 54" Decks – While listed for specific models, these springs fit a wide range of MTD-built decks with the same pivot layout. If your deck uses a horizontal spring between the frame and deck arm, these will work.

Pros

• No guesswork – Bolts on in 10 minutes with basic hand tools. No modifications needed.
• Restores deck lift – If your deck won’t stay in the highest cutting position, these springs fix it instantly.
• Belt stays put – Proper tension eliminates belt chirp and throw-offs during tight turns.
• Outlasts aftermarket – The coating and spring steel quality are noticeably better than $8 generic packs.
• Ships as a pair – Many sellers only offer singles. Having both springs saves you from buying a second set later.
• Works on zero-turn and tractor models – Versatility for owners with multiple MTD-based machines.

Cons

• Not universal – If your deck uses a different mounting system (e.g., torsion springs or gas struts), these won’t fit. Measure your old spring’s length and hook style before ordering.
• Price is higher than generic – At $16 for two springs, you’re paying a premium for OEM branding. A generic pair might cost $10, but expect shorter lifespan.
• No installation instructions – Experienced DIYers won’t need them, but first-timers might want to watch a YouTube video. The listing assumes you know how to detach a deck spring.
• Hook ends can scratch paint – If you’re installing on a freshly restored tractor, the sharp hooks may chip the frame coating. Wrap the hooks in tape during installation to protect the finish.

Bottom Line

These springs are the right fix for a common problem. If your Cub Cadet, Craftsman, or MTD tractor’s deck is sagging, the belt is slipping, or the lift lever feels loose, this $16 pair is your cheapest, most reliable solution. They’re genuine OEM parts that fit perfectly, last years, and eliminate the headache of universal springs that never quite work. I recommend them to anyone with a 42-54 inch MTD-style deck—especially if you’re tired of stopping mid-mow to re-thread a thrown belt. Just measure your old springs first to confirm the hook pattern, and buy the pair even if only one is broken.

Frequently Asked Questions

Q: Will these fit a Craftsman LT1000 with a 46-inch deck?
A: Possibly, but not guaranteed. The LT1000 uses a similar spring system, but the hook orientation varies by deck model. Measure your existing spring’s overall length (hook end to hook end) and compare to the 732-04927/05549 specs. If your spring is roughly 4-5 inches long with closed loops, these should work.

Q: How do I know if my springs are bad?
A: Look for visible rust, stretched coils, or broken hooks. A quick test: with the deck in the highest position, lift the front edge of the deck by hand. If it droops more than 1/2 inch, or if the belt feels loose when you push it sideways, replace the springs.

Q: Can I use these on a zero-turn with a fabricated deck?
A: Only if the deck uses extension springs between the frame and deck arm. Fabricated decks (like on commercial Cub Cadet Z-Force models) often use different spring setups or gas struts. Check your deck’s parts diagram—if it shows a coil spring with hooks on both ends, these will fit.