How to Replace the Drive Belt on a Cub Cadet RZT-S Mower

Cub Cadet RZTOne of the most serious repairs and replacements that equipment owners will inevitably be faced with over the long course of mower ownership is that of the drive belt. Though built to be highly durable and withstand years of use and abuse, the drive belt can become worn and damaged after many years in service. Often, the only course of action is to opt for a full replacement of this key part with an OEM option made by Cub Cadet. Replacement resets the drive system and boosts efficiency, all while reducing the likelihood of more serious engine or mower repair needs. Replacement is a relatively simple, step-by-step process that should be undertaken at the first sign of trouble.

Follow Recommended Safety Procedures During Drive Belt Maintenance

Before drive belt replacement can begin, operators need to ensure their own safety and that of any bystanders who might be around. Start by clearing the area of pets and bystanders entirely, to completely eliminate the risk of their injury during replacement or adjustment. Next, ensure that the mower’s engine has had time to cool off and that the spark plug is disconnected. This will ensure that no unwanted engine ignition takes place during the repair, which could otherwise cause life-threatening injuries to ensue. Make sure that the mower is on a flat and level surface, and that it’s located in an area with good ventilation and a great deal of light. Visibility is key when performing a repair without causing other, equally serious problems for other parts of the equipment.

A Step-By-Step Guide to Full Removal of the RZT-S Drive Belt

Drive belt replacement follows a relatively logical procedure, as do most maintenance routines required of the RTZ-S over its long lifespan. For effective and quick replacement, follow the steps listed below.

Step 1: Prepare the Mower for Replacement

After ensuring good safety procedures are in place, follow instructions in the operator’s manual to remove the mower deck from the equipment entirely. Next, lift the back of the mower and support it as necessary to ensure easier work and better safety. Finally, remove the battery from the mower by following instructions in the operator’s manual.

Step 2: Remove the Left and Right Belt Guards

The left and right belt guards are the key pieces holding the drive belt in place and keeping it out of reach for replacement. Remove both the left and right belt guards separately, using a 7/16-inch wrench to loosen and remove the nuts that hold both guards in place. When removed, set the belt guards aside for replacement later.

Step 3: Remove the Rear Belt Guard

A slightly different belt guard is found to the rear of the drive belt, and should be removed using a 3/8-inch wrench. Set this part aside for replacement later.

Step 4: Perform the Last Steps Prior to Removal

With the belt guards removed, it’s easier to access smaller, internal parts that are keeping the drive belt in place. Start by disconnecting the brake de-clutching rod from its idler pulley bracket hardware. Then, remove the idler pulley tension spring. Finally, loosen the bolt that secures the idler pulley so that there is enough room to remove the drive belt entirely.

Step 5: Remove and Replace the Drive Belt

With space cleared by the loosening of the drive pulley belt, the drive belt can now be carefully removed from the equipment. Set it aside for proper disposal at a later time. Replace the drive belt with a new, OEM belt, and then follow these steps in reverse to prepare the equipment for active use. Remember to perform a test drive before using the mower for intensive landscaping tasks.

Adjustments: A Guide to Improvement Without Removal

An improperly adjusted brake link can cause drive belt problems that might seem as if replacement of the belt is required. In many cases, however, a readjustment of the brake link will return the mower to normal operation. To perform this adjustment, a few steps must be taken. Start by removing the deck, and then remove the bow tie clip from the ferrule that sits at the end of the brake link. Slide the ferrule out of its idler bracket.

With the ferrule slid out of that bracket, adjust it so that it lines up with the back of the appropriate slot and slides in, as needed, with tension placed on the spring. Reconnect the ferrule to the idler bracket, reattach the mower deck, and then give the mower a test drive to ensure it has resumed normal operation.

Get an OEM Cub Cadet Drive Belt Replacement at Ralph Helm Inc.

When a drive belt ultimately fails, consumers need to find a replacement part quickly and with minimal effort. This part should be OEM, meaning it’s actually manufactured by Cub Cadet rather than a third-party retailer that might not have the same quality standards. At Ralph Helm Inc, , drive belts and other OEM replacements are easy to find thanks to a parts lookup tool that filters by equipment type, model number, part number, and engine manufacturer. It’s the easiest way to find a perfectly compatible drive belt for quick replacement.

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