Parts for Bolens 550: Spindle Assembly Parts

A hex screw fastens and holds two components together. It has a hexagonal head and features threading starting underneath the shoulder down to the tip. Its all-metal construction offers rigidity and longer lifespan. It is also threaded, so you can conveniently loosen or tighten in position. It measures 1/4-20 x 0.5 inch and comes in brass or gold color. Take note that this replacement hex screw may beused in different locations of a machine. Double check the device’s model number for compatibility. To install this hex screw, you will need a hex wrench or a hex socket. This hex screw is a replacement made by MTD. This screw/bolt may be used on lawn mowers, snowblowers, tillers, string trimmers, leaf blowers, edgers, chainsaws, pole pruners, log splitters, or wood chippers made by Craftsman, Toro, Cub Cadet, Ryobi, Troy-Bilt, Husky, Murray, Yard Machines, MTD, Huskee, Montgomery Wards, Bolens, Yard-Man, Turf King, or MasterCut. This OEM hex screw is sold individually.

The lock nut is a piece of standard hardware that may have a variety of applications on lawn and garden equipment, including on engines, housings, and other components. The lock nut offers a secure fit by tightening into a flange that prevents the nut from loosening like a regular nut might. Over time, the flange or the nut can become worn or damaged. In some cases, lock nuts may be lost during the process of other repairs or maintenance. Replacing them with genuine OEM parts like this lock nut is the best solution. This lock nut is compatible with hundreds of machines, including mowers, snowblowers, and chippers from MTD, Troy-Bilt, Cub Cadet, RYOBI, Yard-Man, Yard Machines, Bolens, and Husky. The ¼-inch lock nut has multiple locations and applications, so owners should consult their parts diagram for exact placement and part number identification. This lock nut is made of durable metal and sold as a single unit. Those who need additional pieces will have to order multiple quantities. This part will require a wrench or a socket to replace, as well as pliers and/or a screwdriver to hold the bolt or screw in place.

This cotter pin is an authentic OEM replacement part sourced directly from the manufacturer for use on many different lawn and garden machines in many different applications. Cotter pins are pins that are made of metal that are bent with or without curves on one side. The u-shaped pin is used to secure bolts in place. After installation, the ends of the pin are twisted to hold it tightly in place. One example of cotter pin use is on lawnmower wheels. After the wheel is placed on the shaft, the cotter pin slides through the hole on the end of the shaft to keep the wheel in place.Over time, cotter pins may become rusted, or the part being held together may need to be replaced. When the cotter pin is removed, a new one should be installed to ensure a tight hold. Use pliers to untwist or straighten the cotter pin for removal. Pull the cotter pin back through the hole using the pliers. To install a new cotter pin, push the pin through the hole and spread the ends in opposite directions once the pin is through the hole.This cotter pin is made of heavy-duty metal and is sold individually. It is designed for use in many different lawn and garden machines manufactured by various companies, including Craftsman, MTD, and Makita.

This part is a replacement bearing cup. This is a genuine OEM part made by MTD and has been sourced directly from the manufacturer. It is intended to replace a defective or broken bearing cup in lawn tractors.The bearing cup is what houses the variable speed pulley bearings themselves and thus is essential to proper equipment functionality. This part will need to be replaced immediately if ineffective in any way. Wear work gloves to protect the hands and check that equipment is powered off and cooled down before starting the repair process. For more accurate information on how and where to use this bearing cup, the appropriate owner's manual and equipment diagrams should be referred to. This bearing cup is a genuine OEM part made of durable materials and is sold individually. It is suitable for use with tiller models that have been manufactured by MTD, Craftsman, Troy-Bilt, and other brands.

This replacement part is a bearing block. This is a genuine replacement part made by MTD. This bearing block is important to many engines and other small appliances. Bearing blocks work with other pieces near the engine to allow for bearings and other parts to operate smoothly during use. A new bearing block might be needed if the current one is visibly missing or damaged in any way. If the bearing block is no longer able to stay attached or in place, it might be time to replace it. Be sure to wear work gloves while working closely to the engine. It is also recommended that the engine be powered off before attempting to replace this part. This part is a genuine OEM replacement part to ensure proper fit and long-lasting use. This part is sold individually and is sourced directly from the manufacturer.

The torsion spring is designed to create tension between various components in lawn and garden equipment engines. This spring may have multiple applications depending on the type of machine. The torsion spring typically connects levers and other things that need pressure to operate properly. They create torque and help support various items in lawn and garden machines. Over time, they can become worn or the springs can stretch or snap. This will require a replacement of the entire spring, since the unit will typically not be able to function without a properly working torsion spring. This genuine OEM replacement spring is manufactured to exact standards by MTD. This part can be found in hundreds of models from MTD, Yard Machines, Cub Cadet, Troy-Bilt, Husky, Bolens, and Yard-Man. Check the parts diagrams and equipment manual for the exact location and application of this torsion spring. This high-quality spring is made of metal and is sold as an individual unit. Always wear gloves when performing repairs on lawn and garden machines. Beware of pinching and crushing injuries when working with springs, which are typically under a lot of pressure.

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.

This grease fitting attaches to the cast pivot bar on many types of garden and lawn equipment. It is made of durable metal and ensures that internal parts of the equipment are lubricated so they operate at their full potential. Sometimes a grease fitting can become worn damaged and need to be replaced.If a lawn tool no longer seems to be properly lubricated, the grease fitting could be the cause. A pair of pliers will be required to make the replacement. Clean the area near the grease fitting and then use a hex wrench to remove it from the machine. Take the new fitting and place it into the hole and tighten it before applying grease.This is a genuine OEM replacement grease fitting that is sourced directly from the manufacturer. The part is sold individually. The fitting is compatible with chipper shredders, lawn tractors, snowblowers, string trimmers, edgers, chainsaws, and lawnmowers manufactured by Yard-Man, Cub Cadet, Troy-Bilt, Craftsman, Ryobi, Murray, Broan, Yard Machines, Huskee, Montgomery Wards, Bolens, MasterCut, and MTD.

This ball bearing is made of durable metal and fits in between a spacer and a washer to prevent excessive friction and heat between different parts of lawn and garden equipment. If the bearing retainer or the ball wears out, it can cause problems with turning the wheel on a lawnmower or other equipment. The balls take the load and spin to distribute weight evenly while avoiding friction so the tool can run smoothly.Ball bearings experience wear constantly when a machine is being used, so they can start to wear out or experience problems. The heat, vibration, pressure, and friction will start to wear them down. Because of that, ball bearings often need maintenance or replacement. To replace the ball bearings, remove the wheels and the height adjuster, if present. Take out the old bearing holders and remove the bearings. Put the new ones in and reassemble the machine.This is an authentic OEM replacement ball bearing directly sourced from the manufacturer. It is sold as an individual item. The ball bearing is designed for edgers, lawn tractors, trimmers, and lawnmowers manufactured by Yard-Man, Craftsman, MTD, and Yard Machines.

The blade adjuster rod is used to set the position for the blade for bevel cutting. These are useful for those who want to have more control over the way their mower or edger works and the results they can achieve. The adjustment rod is made from metal and is generally long-lasting. However, over time, it can suffer from wear and tear and may even break. To replace the rod, a screwdriver, pliers, a wrench set, and a socket set may be needed. Repairing the adjustment rod should be relatively easy and only take about half an hour to complete. The rod-adjust is a genuine OEM part that can work with a range of machines from Craftsman, Yard Machines, MTD, Bolens, and Yard-Man. The rod-adjust is most commonly used in lawnmowers and edgers.

This is a replacement spacer for walk-behind lawn mowers, riding lawn tractors, snowblowers, and other outdoor machinery. The spacer prevents parts from grinding together and wearing down. This spacer fits over the axle areas and is a small, flat, metal ring.Over time and through wear and tear, a spacer can go bad or get bent. This is also dependent on frequency of use. For equipment used maybe once a week (or month, depending on the season), replacing a spacer may never be a concern. For machines used more frequently, it may be a rather minor fix. Replacing the spacer is simple, and requires a screwdriver, pliers, wrench, and a pair of durable gloves. The replacement requires some disassembly of the lawn mower and its inner workings.This is a genuine OEM replacement spacer. This part is compatible with over 150 products and machines. This part is sold separately.

This ground drive belt works to drive the transmission, which turns the wheels of the lawn maintenance equipment. The ground drive belt might be attached in a way that transfers the engine’s power to the pulley in charge of spinning the blades instead. Ground drive belts are made from a flexible rubber that can become brittle, cracked, or broken over time. The replacement of the ground drive belt will require a wrench to complete. This ground drive belt is compatible with Bolens, Craftsman, Ryobi, MTD, Troy-Bilt, White Outdoor, Yard Machines, and Yard-Man brands. It can be placed in lawnmowers, tillers, chipper shredders, leaf blowers/vacuums, edgers, log splitters, snowblowers, trimmer, and other lawn and garden equipment. This ground drive belt is a genuine OEM part.

This replacement blade is a genuine MTD part for select models of edgers. The edger blade is responsible for cutting the weeds and grass from the edges of concrete, landscaping, and other elements. Over time and with regular use, blades can become dull or damaged. They also contact the ground regularly, which can lead to dents or other damage. In the event that the edger blade is damaged or warped in any fashion, it should be replaced immediately for safe operation of the machine. This replacement part provides an exact fit for compatible units. This genuine edger blade from MTD is compatible with multiple units, including hundreds of models from Troy-Bilt, MTD, Yard Machines, Yard Man, Husky, and Bolens. This model has a 5/8” center hole for attaching the blade nut to secure the blade. Always wear gloves when replacing edger blades and be sure to disable the engine for added safety. This repair will require a wrench or socket set to remove the blade nut and replace it once the blade is changed. This blade is sold as a single unit and comes un-sharpened.

This genuine MTD belt cover can be used as a replacement part for lawn and garden appliances that are operated by small engines, such as lawn tractors, snowblowers, chipper shredders, leaf blowers, edgers, and lawnmowers. The purpose of a belt cover is to protect the gears, the belt, and the engine and its components from accumulating dirt and debris internally, which can cause individual components to malfunction and fall into disrepair.A belt cover will have to be replaced in the event that it can no longer protect the gears, the belt, and the engine. A belt cover can suffer from damage as a result of overuse or direct collision; this form of damage can limit the ability of the belt cover to perform its precautionary function. Remember that gloves must always be worn when handling, repairing, and operating outdoor equipment. This OEM belt cover part is compatible with the following brands: MTD, Craftsman, Cub Cadet, and Yard Machines. This part is sold individually.

The tri-cut blade works to replace edger blades to ensure they are sharp and capable of cutting through the grass and turf properly. The blade is made from metal and can provide users with clean edging around the edges of their lawn and around flower beds. Regularly examine the edger blade regularly to ensure that it is not bent, broken, or otherwise damaged. If your current edger blade is no longer sharp and cannot be sharpened, it is time for a replacement. Without a sharp blade for the edger, it will be impossible to take care of the lawn properly. To replace the blade in your edger, the only tool required is a wrench. Replacing the blade is easy, and it should not take more than 15 minutes. This OEM part is sold individually, and it works with edgers from a range of brands, including Craftsman, Yard Machines, MTD, Troy-Bilt, Bolens, and Yard-Man.