Step 24: Check the cruise control/parking brake adjustment on the variable speed belt drive. For Troy-Bilt, MTD, MTD Gold, Bolens, White Outdoor, Huskee, Yard Machines and Yard Man. Remove the lower drive belt from the mower by pulling it towards the engine. Mtd yard machine 38 deck belt replacement. Riding Mower Tires & Wheels. Then re-install the belt guide, which was removed from the variable speed pulley bracket, by using a 1/4" socket. Remove the cutting deck. Step 26: Re-install the battery. Step 9: Remove the belt keeper. Disconnect the linkage from the latch assembly.
Always observe safety rules when performing any lawn mower maintenance. Safety glasses or goggles, and hand protection, in the form of mechanic gloves, should always be used. Step 20: Install the new riding lawn mower upper drive belt. Note: DO NOT get any anti-seize compound on the bolt threads or in the bolt hole of the crankshaft. Look down through where the battery was located.
Apply a very small quantity of anti-seize compound to the engine crankshaft. Step 1: Position the mower to change the lawn mower belt. For a proper working machine, always use factory approved lawn mower belts. The V belt found on your tractor is specially designed to engage and disengage safely. Step 13: Install the new lower drive belt.
Be careful not to get any of the anti-seize compound on the belt or in the "V" of the pulley. Remove the bolt securing the crankshaft pulley using a 5/8" socket. Step 18: Replace the lower transmission belt. Step 11: Make a note of where parts are located before you install a new drive mower belt for your riding lawn mower. Step 12: Remove the lower drive belt from the lawn mower. Nstall the new upper drive belt into the upper sheave of the variable speed pulley and around the transaxle pulley. When disconnecting the battery, always disconnect the black negative battery cable first, and then disconnect the red positive battery cable. Step 28: Check the operation of the new lawn mower belts. Yard machine 38 inch deck belt diagram 48 inch. Step 27: Reattach the spark plug wire(s). As you install the new lower drive belt, confirm the correct belt routing inside of all the belt keepers and through all the guide pins using the pictures taken before the lawn mower belt removal. A substitute, or NON-Original Equipment Manufacturer (OEM), V-belt can be dangerous as it may not disengage completely. Before starting this project, make sure you have the correct lawn tractor parts. Riding Mower 38-inch Deck Belt.
These instructions are specifically for a 700 Series riding mower. Step 14: Apply anti-seize compound to the crankshaft. Maneuver the upper (rear) belt from the transaxle pulley and remove the belt from the mower. You will see a large transaxle pulley. The following procedure will be for the speed control linkage on the variable speed belt drive. Start the unit and check that all linkage and related safety features are operating correctly before returning the mower to full operation. Yard machine deck belt size. Use our Part Finder to look up your belt based on the part numbers for your riding lawn mower. Common parts include: Riding Mower Blades.
If your new lawn mower belts and other parts are running smoothly, then you're ready to get back out and mow! Instructions for removing the cutting deck can be found in your Operator's Manual in the "Service" section. Ground the spark plug wire (s) against the engine to prevent it from starting during lawn mower maintenance. Step 19: Re-install the lawn mower belt keeper and belt guide. Loosen the large nut holding the pulley to the input shaft using a 7/16" socket. With the parking brake still engaged remove the cotter pin from the ferrule on the top side of the variable speed pulley bracket. Depending on your model, the steps to install lawn mower belts may vary. Open the hood and remove the spark plug wire(s). Oil, Lubricants and Fuel Additives.
Step 4: Remove the cutting deck and battery. Re-install the belt keeper surrounding the engine pulley, using a 1/2" wrench. Fix equipment issues quickly. If the engine is hot, allow the exhaust system to cool down before attempting any maintenance. Step 10: Remove the bolt securing the crankshaft pulley. Disconnect the ferrule from the bracket. Step 7: Remove the upper drive belt and lawn mower belt guide. Free Shipping on Parts Orders Over $45. This will relieve tension on the upper drive belt. Carefully lift the middle sheave slightly so the belt will clear the belt guide and slip it onto the variable speed pulley. Place the lower transmission belt into the upper "V" Pulley closest to the engine on the crankshaft pulley. Secure the ferrule with a new cotter pin and test the operation of the linkage. Even if only slightly worn, operating with damaged equipment could cause larger issues if not addressed. Tighten the large nut that secures the transaxle pulley to the input shaft of the transaxle using a torque wrench and torque to 10-15 foot pounds (13.
How To Repair the Drive Belt on a Riding Lawn Mower. Note: The use of an air impact gun is recommended for removal purposes. Put the cotter pin back through the hole in the ferrule on the top side of the variable speed pulley bracket. Using a torque wrench, tighten the crankshaft pulley bolt, to a torque of 37. Step 15: Insert a spacer. Step 17: Tighten the crankshaft pulley bolt. Put the cutting deck back in place under the mower as outlined in your owner's manual.
Note: Because there is inter-play between the two drive belts in the variable-speed pulley system, it is a good practice to replace both riding lawn mower drive belts at the same time. Then lift the seat to gain access to the battery. Then, install the crankshaft pulley bolt with the lock washer and heavy flat washer in place. During the installation process, you can refer back to the pictures for reference. If you need to make an adjustment there will be tension on the linkage and the resulting friction will cause resistance as you slide out the ferrule. Thread the ferrule up or down the rod until the post fits in the hole without any resistance.
For the do-it-yourself homeowner, here are some step-by-step instructions on how to change a riding lawn mower drive belt. When you need parts for your walk-behind lawn mower or riding lawn mower, you can use the MTD Genuine Parts Part Finder to find the correct one. While holding the spacer in place, install the crankshaft pulley. Again, with the parking brake engaged, remove the cotter pin that secures the ferrule in the latch assembly. Reconnect the spark plug wires to the spark plugs. Next, remove the belt guide from the variable speed pulley bracket using a 1/4" socket. Step 21: Re-install the tension spring. If you are uncomfortable with this procedure or don't feel qualified to replace your riding lawn mower drive belt, please contact your Authorized Service Dealer for drive belt replacement. Opposite of when you removed the battery, connect the red positive battery cable to the positive battery terminal first. Belt Specifications. Step 2: Check the engine temperature before replacing the lawn mower belt. Because of the tension change when you replace lawn mower belts, it is always recommended to check all drive adjustments after changing the drive belts. If while performing lawn mower maintenance on your drive belts, you noticed other issues or signs of wear, take the time to order replacement lawn tractor parts before running the machine again. If you find your machine has a bigger problem, use our service locator to find a qualified MTD service provider in your area.
If not, use a strap wrench to hold the crankshaft pulley while loosening the bolt. As you remove the engine pulley, note the orientation of the parts for reassembly (or take a picture). The MTD Genuine Parts Knowledge Center provides do-it-yourself instructions for performing many basic maintenance items, including replacing cutting blades, drive and deck belts, and engine oil.