753-09904A 983-05182A Deck Brake Arm Kit Compatible with MTD, Cub Cadet, Craftsman 42-Inch Mower Deck, Fits 13AD78XS099, 13AL78XT099, 13AL78XT299

What It Is

This deck brake arm kit (parts 753-09904A and 983-05182A) replaces the brake assembly that stops the mower blade(s) when the operator releases the blade engagement handle. It’s designed for MTD, Cub Cadet, and Craftsman 42-inch lawn tractors with stamped steel decks.

Fitment & Compatibility

• Deck size: 42-inch cutting deck only. This kit will not fit 46-inch or 50-inch decks.
• Model numbers: Verified to fit 13AD78XS099, 13AL78XT099, and 13AL78XT299. Always check your tractor’s model number (stamped under the seat or on the frame).
• OEM vs aftermarket: This is an aftermarket replacement; OEM part numbers are 753-09904A (arm) and 983-05182A (bracket). Confirm your existing part numbers match.
• Measurements: The arm is about 6.5 inches long; the bracket has two mounting holes spaced 2.5 inches apart. Compare to your old part before ordering.

Key Things to Know

• Installation difficulty: Moderate. You’ll need basic hand tools (socket set, pliers) and about 30 minutes. Access to the underside of the deck is required.
• Common gotcha: The brake pad itself is not included in this kit. If your pad is worn through, you’ll need to buy it separately (part 490-500-M108 or equivalent).
• Quality: Most users report good fit and function, but some note the bracket holes may need slight filing to align perfectly on older decks.
• Safety check: After installation, test the blade engagement lever—the brake should stop blades within 3 seconds. If not, adjust the cable tension.

Should You Buy It

If your 42-inch MTD/Cub Cadet/Craftsman tractor’s deck brake is failing to stop blades or the arm is bent/broken, this kit is a solid, affordable fix. It’s not for complete brake system overhauls (you’ll need pads separately) but works well for the arm and bracket replacement. Avoid if your deck model isn’t listed or if you need a full brake rebuild.