Parts for Mtd 13AL78ST299: Deck / Spindle Pulley Parts

Left-hand deck bracket assembly for lawn tractors and riding mowers. Mounts and supports the mower deck. Replace if bent, cracked, or broken.

Replace your cracked or broken lawn tractor discharge chute assembly. Mounts to the mower deck to direct grass clippings away from the cutting area.

Seat wiring harness jumper for front-engine lawn tractors. Connects seat safety switch to electrical system. Replace if frayed, damaged, or corroded.

Replace a faulty main wiring harness if your lawn tractor won't start, has electrical issues, or shows intermittent power loss. Direct fit part.

Deck brake assembly stops mower blades safely when disengaged. Fixes blades that won't stop spinning or take too long to halt. Moderate DIY repair.

Deck won't stop spinning after disengaging blades? This lawn tractor deck brake assembly stops mower deck rotation for safe operation and blade changes.

The replacement screw seen here is made from high-quality, durable metal. It is an identical replacement for a faulty screw in many types of lawn and garden equipment. The screw features a hex-bolt shaped head and is used for various applications in the machines. Owners will want to refer to diagrams of their model to ensure the correct application for the screw. A screw may need to be replaced for any number of different reasons. In some cases, the screw could become lost when making other repairs to the machine. It could also become bent or the threads could be damaged. Corrosion is also a possibility over time. Replacing the screw is typically considered a fast and easy repair. The screw is a genuine OEM replacement part that is sold individually. The screw can be used for many models of snowblower, lawnmower, chainsaw, tiller, string trimmer, log splitter, edger, and wood chipper. Compatible brands include Craftsman, Cub Cadet, Troy-Bilt, Murray, Yard Machines, MTD, Huskee, Montgomery Wards, Bolens, Yard-Man, and MasterCut.

Hex head self-tapping screw for outdoor power equipment. Securely fastens components throughout your machine. Replace if missing, stripped, or worn.

This is a genuine replacement bolt that is designed specifically for use on select lawn tractors. This tractor bolt is a specialty piece of hardware designed for use on the steering segment gear. This screw holds the gear in place and is exposed to constant vibrations and repetitive motion as a result. Over time, that can result in damage, wear, or even total breakage of the bolt and require a replacement. If the bolt isn't functional or is missing, the steering segment gear will not be secured and that can lead to further damage if left unattended. Using a genuine replacement part like this will guarantee an exact fit for compatible models. This genuine OEM gear bolt is manufactured by MTD. It is compatible with lawn and garden equipment from RYOBI, HUSKEE, Troy-Bilt, Bolens, Yard Machines, Yard Man, and Cub Cadet, along with select models from MTD. The bolt works for more than 100 compatible models. It is made of durable metal and sold as an individual unit. A wrench or socket will be required to replace this part. Always wear gloves when performing repairs on lawn and garden equipment and allow the engine to cool before doing any work.

There are multiple uses for the 5/16-18 Hex Screw. It is often used with small gasoline-powered yard equipment such as lawn and garden machines. While hex screws such as these may be used in edgers and snowblowers, the most frequent use this screw is in yard tractors. This variety of screw is commonly used in attaching the various appendages of gas-powered equipment to a central operating platform. In particular, these hex screws are used to secure the engine block of power tools to the frame or housing of the equipment. Once in place, these fasteners have an almost unbreakable strength to them. This is so much so the case that often, in order to detach the engine manifold and repair the inner workings of an engine, the bolts must be chiseled or cut loose. In such cases, it is necessary for the bolts to be replaced during reassembly. Manufacturers insist that genuine OEM replacement parts be used in the rebuilding process. These replacement parts were manufactured to the same exacting specifications used to make the original screws. These OEM screws are compatible with equipment made and sold by Yard-Man, Cub Cadet, Troy-Bilt, Husky, MTD, Bolens, and Yard Machines.

Hex screw fastener for securing lawn mower components. Replace if stripped, rusted, or missing to ensure proper assembly and equipment stability.

This self-tapping screw is used to attach various parts to the engine housing of medium sized gasoline powered engines, in particular yard tools such as tillers, snow blowers, yard tractors, riding mowers, power vacuums, shredders, and chippers. It is used in over 150 different gasoline powered engines. Screws such as these are used particularly when a device is going to receive a great amount of vibration and stress while the engine is running and rotating tools are engaged. Such devices sustain a great deal of wear over time and the parts subject to replacement will eventually fail and need to be replaced. In such cases, it is wisest to replace the attaching hardware such as housing screws as well, because it is a self-tapping screw. Screws of this type are designed to forge a tight bond between the metal pieces they are securing together, but once loosened, they should ideally be replaced with new hardware. Make sure when replacing these screws to use genuine OEM parts like these screws. These replacement parts are manufactured to be identical to the original pieces. This hex screw is compatible with the following brands: MasterCut, Yard-Man, Yard Machine, Montgomery Wards, MTC, Murray, Bolens, Craftsman, Turf King, Troy Bilt, Cub Cadet, Huskee, Toro, and Ryobi.

Replace the hex screw in your lawn tractor or riding mower. Used to secure various components throughout the machine. Order a new screw if damaged or lost.

Hex screw for lawn tractors and garden equipment. Replaces missing, loose, or deteriorated fasteners in various mounting applications across the machine.

Carriage bolt for riding mowers and lawn tractors. Secures deck components and structural parts. Replace if bolt is stripped, broken, or missing.

Replace a missing, damaged, or worn push nut on your lawn tractor or riding mower. This fastener securely holds parts in place during operation.

Flange lock nut secures components on mowers and outdoor power equipment. Replace if stripped, corroded, or missing to restore proper fastening.

This is a flanged lock nut. It’s designed to apply tension, typically on a joint that needs to have a certain amount of flex. As such, it’s mostly used on snowblower chutes and lawnmower handles. They can remain in place, but with a forgiving connection that can take a beating. The nut size is 3/8, with a thread size of 16. A lock nut will generally last for many years. However, the silicone ring inside will wear down if it’s frequently tightened and loosened. It needs to be replaced when it will no longer reliably remain in place. Generally, this begins as a symptom of slight slippage and worsens as time goes on. Thankfully, whether it’s being used on a snowblower or a lawnmower, this nut is generally straightforward to access. Simply unscrew the old nut, then screw the new nut on until it’s nice and tight. Our flanged lock nuts are genuine OEM MTD nuts, and they are sold individually.

Replaces a stripped, damaged, or missing 5/8" hex flange nut on your lawn mower or snow thrower. Secures blades and other components with integrated washer.

Replacement hex nut for riding mowers and lawn tractors. Secures components together throughout the equipment. Replace when stripped, missing, or damaged.

Split pin fastener for lawn tractors and outdoor power equipment. Secures axles, linkages, and moving parts. Replace when bent, missing, or corroded.

Secures pins and shafts on lawn tractors and riding mowers. Replace if bent, missing, or worn. Bow-tie design inserts through pre-drilled holes.

Deck height adjustment gear for lawn tractors and riding mowers. Replaces broken or worn gears that control cutting deck position and leveling.

Nozzle adapter for lawn tractors and riding mowers. Connects hoses or tubes in the fuel or deck wash system. Replace if cracked, stripped, or missing.

If your mower belt is exposed to debris or weather damage, this deck belt cover shields it from impact and extends belt life. Plastic cover snaps on easily.

This extension spring attaches to the axle support bracket and the drive belt idler pulley on many types of lawn and garden equipment. It creates additional tension to the drive belt idler pulley. Sometimes the extension spring can be stretched out or may break, often caused through excess use. If this is the case, the spring will need to be replaced.If the spring is broken or no longer creates the appropriate amount of tension, replacement is required. It is an easy process that only requires a set of pliers. The pliers can be used to take the old spring off of the yard equipment before attaching the new extension spring. Make sure the equipment is on a stable surface and powered off when working with it. Remove the spark plug wire to prevent accidents.This extension spring is an authentic OEM replacement part sourced directly from the manufacturer. It is sold as an individual component. The spring is made to be used with lawnmowers, lawn tractors, and tillers created by MasterCut, Yard-Man, Bolens, Huskee, MTD, Yard Machines, Murray, Troy-Bilt, Cub Cadet, and Craftsman.

Compression spring for riding mowers and lawn tractors. Replace if spring is broken, stretched, or missing to restore proper component tension and fit.

Torsion spring for lawn tractors. Attaches to components to exert force for proper operation. Replace if broken, cracked, or missing.

This replacement part is an extension spring. This is a genuine replacement part made by MTD. This part is an important part of many types of appliances. Extension springs ensure that torque and other forces allow the engine to run smoothly.A new extension spring might be needed if the current one is missing or damaged. This type of spring can easily become brittle under pressure and snap after many uses. This is normal and a frequent occurrence due to normal wear and tear over time. Be sure to replace this spring as soon as possible if this happens. Ensure the engine is turned off and completely cool before beginning any repairs.This part is sold individually and is sourced directly from the manufacturer. This is a genuine OEM replacement part.

5-inch diameter deck roller wheel for lawn tractors and riding mowers. Replaces cracked, worn, or missing deck wheels that support smooth cutting deck operation.

Rubber hood bumper installs between hood and dash panel on lawn tractors. Replace if original is cracked, missing, or worn to prevent metal-to-metal contact.

This lock washer is used frequently for a number of applications on power yard equipment. The size, 5/16, is the default for many small engine housing and manifold applications. Lock washers are used with machined bolts to fasten engine blocks to the housing of the equipment being used. The compressed washer is able to handle the constant vibration of the small gasoline engine without losing the seal between the screw or bolt and the housing. Typically these lock washers only need to be replaced when they are misplaced during repairs or when the screws that attach them have to be chiseled or cut away, meaning the washers are destroyed as well. These OEM certified replacement washers have been manufactured to the same specifications as the originals they are replacing. In addition to lawn mowers, lock washers of this type and size are frequently used on blowers, lawn tractors, cultivators, snowblowers, and trimmers. Brands compatible with this type of washer are Murray, Husky, Poulan, Bolens, Yard-Man, Cub Cadet, Troy-Bilt, Yard Machines, MTD, and Ryobi.

If bolts keep loosening on your lawn mower or snowblower, this internal lock washer prevents gradual loosening. Easy DIY fix in minutes.

This flat washer is used to attach the idler pulley in a number of small and medium sized gasoline powered engines. These engines include snow blowers, log splitters, riding mowers, lawn tractors, and chippers. Because the idler pulley is subject to a great deal of resistance when the pulley is engaged, eventually the pulley will wear out. Should there be a squealing sound when engaging the drive, the problem is likely the idler pulley. In these cases, the pulley must be replaced. It is a good idea to replace the surrounding hardware when replacing the idler pulley; tNhis includes the flat washer, which is subject to corrosion during heavy use. To replace the idler pulley, first detach the spark plug cap. If on a mower or tractor, drop the mower deck. Remove the original pulley and install in order: replacement pulley, hex bolt, flat washer, flange nut. Apart from dropping the mower deck, the only tools required to complete this installation may be a 9/16 ratchet and combination wrench. This washer is a genuine OEM replacement part, designed to perfectly replicate the original piece. This washer is compatible with Troy-Bilt, Yard Man, Yard Machines, MTD, and Craftsman devices.

Belt guide ensures proper belt alignment on your lawn tractor. Replace if belts slip, wear unevenly, or mower performance declines. Confirm fit with model.

Shoulder spacer for lawn tractors and riding mowers. Installs to maintain proper spacing between components. Replace if worn, damaged, or missing.

Shield mounting screw for lawn mowers and tractors. Secures protective shields and covers. Replace if stripped, missing, or damaged during maintenance.

Shoulder bolt for riding mowers and lawn tractors. Used as an axle for wheels and deck components. Replace if bent, worn, or stripped from regular use.

Replace worn blades causing uneven cuts or poor grass discharge. High lift blade creates suction for better clipping removal in deep or wet grass.

Belt keeper rod guides and positions drive belts near the engine pulley. Replace if bent, damaged, or causing belt slippage. Verify fit with model number.

Front deck lift rod for lawn tractors and riding mowers. Connects mower deck to lift mechanism. Replace if bent, damaged, or corroded for proper operation.

Belt keeper rod for lawn tractors. Holds drive belt in proper position to prevent slippage and maintain tension. Replace if bent or damaged. Verify fit with your model number before ordering.

Deck release pin secures the mower deck to the tractor frame. Replace if bent, broken, or missing to properly attach and support your cutting deck assembly.

This is a shoulder screw commonly used as a replacement for use with lawn tractors and mowers. This screw is used to secure the grille's pivot bracket on the machine. If the screw is damaged, it could be difficult to use the grille on the tractor. Replace the screw if they notice any problems.The shoulder screw is made from metal and it is durable. However, it could have some damage that would require a replacement. The threads might become stripped, or the screw could even start to corrode. The edges of the screw could also start to wear away. The screw is small, and it could be lost when working on the tractor, which is another reason a replacement may be needed.The shoulder screw will work for many tractor models from MTD, Yard Machines, Bolens, Yard-Man, Troy-Bilt, Cub Cadet, and Husky. The screw is sold individually, so owners might want to have several of them available. This is a genuine OEM replacement part.

Fix wobbling mower blades with this spindle shaft. Common repair for uneven cuts and blade vibration. Moderate DIY with socket set and hammer.

Deck spacer that attaches to the mower deck shell to create proper spacing between components and reduce friction. Replace if cracked or missing.

This casing clamp is a genuine MTD part, sold individually. This casing clamp can be used as a replacement part in lawn mowers, snowblowers, and tillers. The purpose of a casing clamp for one of these outdoor appliances is to affix the governor control plate to the tank assembly so that it remains stably placed throughout the standard operation of the appliance.If the casing clamp is subject to damage in the form of puncturing, denting, cracking, warping, or eroding over time, it should be removed and replaced by this genuine OEM replacement part.This is a genuine OEM replacement part sourced directly from the manufacturer. It is sold individually. This casing clamp is compatible with the following outdoor appliance brands: MTD, Craftsman, Ryobi, Cub Cadet, Troy-Bilt, Murray, Yard Machines, Huskee, Montgomery Wards, Yard Man, Bolens, and MasterCut.

Chute hinge pin for lawn tractors and riding mowers. Secures the discharge chute hinge assembly. Replace if bent, broken, or missing to restore proper fit.

This replacement part is a torsion spring and is intended for use in different types of lawn equipment. This is a genuine replacement part made by MTD. This spring is found in different types of lawn mowers and is able to assist other parts working together to allow the engine to run properly and smoothly. Though this spring is small it is an important part of many machines.A new torsion spring might be needed if the current one is damaged or missing. Because of the nature of the spring, it is not unusual for it to become stripped or snapped due to normal wear and tear within the machine. Unusual noises may come from inside the machine if the torsion spring is not working properly. This torsion spring is sold individually and is sourced directly from the manufacturer to ensure proper fit. This is a genuine OEM replacement part.

Fixes belt slipping or falling off on your riding mower. This idler pivot bracket maintains proper belt tension. Moderate DIY difficulty replacement.

Belt guard for 46-inch lawn tractors and riding mowers. Replace if cracked, damaged, or missing to protect belts and ensure safe operation. Verify fit.

Supports the idler pulley to maintain proper belt tension on your lawn tractor. Replace if bracket is bent, cracked, or causing belt slippage issues.

Holds the discharge chute securely in place on your lawn tractor deck. Replace if bracket is cracked, broken, bent, or missing to properly mount the chute.

Deck pulley transfers power to mower blades. Common when blades won't engage or spin unevenly. Straightforward repair for most DIYers with basic tools.

A ball bearing is a common type of rolling-element bearing. It will use balls to keep space between the bearing races and eliminate friction and contact between moving parts. Ball bearings used in lawn and garden equipment ensure that axial loads and radial loads are evenly supported and that there is only a limited amount of rotational friction on the component. It distributes weight evenly, but will undergo constant wear and tear from vibration, heat, and friction and will need replacement regularly. This ball bearing is a genuine OEM part suited to use in Craftsman, Cub Cadet, Ryobi, Troy-Bilt, MTD, Huskee, Yard Machines, Bolens, Mastercut, and Yard-Man equipment. It may be needed for repair work done on a lawnmower, snowblower, tiller, edger, or a log splitter.

Fix a deck that won't lift or adjust properly. This pivot cup lets the lift arm move freely while staying secured to your mower deck. Easy DIY fix.

Replace cracked or deteriorated vent hose on your lawn tractor or riding mower. This 3/16" ID hose connects fuel tank ventilation components.