Replacing Electric Clutch In Cub Cadet: Step-By-Step Guide

how to replace electric clutch cub cadet

If you're looking to replace the electric clutch on your Cub Cadet, there are a few things to consider. Firstly, electric clutches are generally more expensive and non-rebuildable compared to manual clutches. It's important to have the correct model number to find the right replacement part. When replacing the clutch, the process may vary depending on whether you own a narrow frame, wide frame, or spread frame model. Additionally, you may need to remove the engine first for certain models. It is also recommended to refer to the owner's manual for specific instructions.

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Removing the PTO clutch lock

To remove the PTO clutch lock on a Cub Cadet, you will need to identify the lock that keeps the PTO clutch locked in place. This could be bolted in, or it may be a rod. Once you have located the lock, you can attempt to remove it.

One way to remove the lock is by using a 1/2 inch air impact tool to counter-clockwise loosen the bolt. If the bolt is very tight, this may be necessary. If the "stop/engage" bracket is spot welded on, you may need to grind the welds out and remove the two motor mount bolts to remove the bracket.

If you are working on a narrow-frame Cub Cadet tractor (models 70, 71, 72, 73, 100, 102, 104, 106, 122, 124, and 126), you will need to remove the engine first. For wide-frame tractors (models 86, 108, 128, 800, 1000, and 1200) and spread-frame tractors (models 580, 582, 800, 1000, 1050, 1200, 1282, 1535, 1604, 1606, and 1806), you can skip this step.

If your Cub Cadet has solid motor mounts, the driveshaft will not be able to move with the engine, and the flexible rubber disc(s) at the end of the driveshaft will be useless. In this case, you will need to remove the flexible rubber disc(s) and install spacers and hardened steel bolts to fasten the coupler arms together.

Finally, when assembling the clutch components, ensure that the clutch release/throw-out bearing is installed with the collar facing towards the clutch disc.

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Using a 1/2-inch air impact to remove bolts

When removing an electric clutch from a Cub Cadet, it is important to use the right tools. In this case, a 1/2-inch air impact wrench is recommended by some users. This tool can be used to forcibly pull the clutch/pulley from the crankshaft.

First, it is important to note that the air impact wrench should be heavy-duty and of good quality. A heavy-duty tool will have the necessary power to remove the clutch efficiently and effectively. It is also important to ensure that the air compressor has enough power to operate the wrench.

Next, insert the jaws of the 1/2-inch air impact wrench into the slots of the removal tool. Make sure that the wrench is securely in place and that it is the correct size for the tool.

Once the wrench is inserted, activate the air compressor to power the wrench. This will provide the necessary force to remove the bolts. Hold the wrench firmly and apply steady pressure in the counter-clockwise direction to loosen and remove the bolts. It may take some time and effort to break the bolts free, especially if they are tightly fastened.

When using the air impact wrench, it is crucial to exercise caution and follow safety guidelines. Wear appropriate protective gear, such as safety goggles and gloves, to shield yourself from any debris or projectiles. Ensure that the area is clear of any bystanders or obstacles that could be harmed or damaged during the process.

Additionally, be mindful of the surrounding components to avoid accidental damage. It is also important to note that using an air impact wrench incorrectly can result in breaking or damaging certain parts. Therefore, if you are unsure or uncomfortable with the process, it may be advisable to seek professional assistance or refer to other methods of bolt removal.

By following these steps and instructions, you can effectively utilize a 1/2-inch air impact wrench to remove bolts when replacing the electric clutch on your Cub Cadet.

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Replacing rubber mounts with solid steel motor mounts

To replace the electric clutch on a Cub Cadet RZT 50, you will need to first locate the lock that keeps the PTO clutch locked in place. This could be bolted in or be a rod, and sometimes you can remove it and replace the belt without removing the clutch.

Now, to replace rubber mounts with solid steel motor mounts, you can follow the steps outlined below. This process is specifically for Cub Cadet "Quiet Line" garden tractors that originally came with a rubber ISO-mounted engine.

Firstly, understand that with solid motor mounts installed, the driveshaft will not be able to "move" with the engine, and there is a reduced chance of clutch parts prematurely wearing or breaking. The flexible rubber disc(s) at the end of the driveshaft will be useless and could deteriorate over time.

To replace the rubber mounts with solid steel mounts, you can either:

  • Remove the brackets and fabricate a minimum 1/4" thick plate steel, setting it at the right height and welding it to the frame. Ensure that the engine mounting holes and oil drain plug hole are properly located (centered) and drilled in the plate first.
  • Or, instead of replacing the OEM coupler arms with a machined rigid tubular coupler, make the coupler arms rigid by removing the flexible rubber disc(s) and installing spacers. For a single disc, use 3/8" thickness spacers, and for double composite clutch discs, use 3/4" thickness spacers. Fasten the arms together with 3/8" diameter hardened steel bolts.

Note that solid steel mounts may increase vibration and noise, and could cause other chassis parts to vibrate loose quicker. However, steel mounts are more durable than rubber and do not wear out as quickly.

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Installing a clutch release/throw-out bearing

When installing a clutch release/throw-out bearing, there are several important steps to follow. Firstly, it is crucial to identify the correct type of bearing for your specific Cub Cadet model. The bearing should be compatible with the clutch assembly and other components. Before installing the new bearing, it is recommended to clean the entire assembly with a suitable solvent, ensuring that all debris and drill cuttings are removed from the rollers.

The next step is to position the bearing correctly. The clutch release/throw-out bearing should be installed with the collar, which is the centre part that protrudes, facing towards the clutch disc. It is vital to ensure that the bearing is not installed backwards on the driveshaft. Additionally, a 3/32" hole should be drilled into the grease/dust seal on the back of the bearing.

In terms of the clutch yoke, there are different approaches to removing and replacing it. One method involves removing the top yoke pin first and replacing it last. This allows access to the bearing and facilitates its replacement. Another approach involves using a screwdriver to pry one side of the yoke away from the bearing, allowing it to pop out with minimal effort. Subsequently, the other side can be slid out, and the bearing can be removed from the shaft.

Adjusting the pressure plate fingers to 1 and 1/4 during the installation process is also recommended. This adjustment helps to ensure a smooth clutch operation and can address issues such as clutch chatter and grabbing. It is worth noting that splitting the tractor may be necessary to access certain parts and make adjustments.

Lastly, it is important to consider the clutch cushion spring or teasing spring, which is present in early/narrow frame and later model Cub Cadets, respectively. This spring is designed to allow the rear pressure plate to gently press against the clutch disc during clutch engagement, preventing a "jerky" clutch. When using an aluminium clutch disc, the spring can be replaced with a steel spacer or washers, and a lock washer can be installed between the pressure plates for a smoother clutch engagement.

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Finding the correct Cub Cadet replacement part numbers

Finding the correct replacement part for your Cub Cadet machine is essential to ensure it functions properly. Cub Cadet offers a variety of ways to find the correct replacement part numbers for your machine.

Firstly, it is important to identify the model number of your Cub Cadet machine. The model number is an eleven-character code that includes numbers, letters, or hyphens. This model number can be found on the product's 'Product Identification Label', and its location varies depending on the product type. For example, for model numbers beginning with '11' or '12', you can find the label on the rear left side of the product's cutting deck. On the other hand, for model numbers starting with '13', '14', '17', or '53', the label is located on the underside of the seat pan. Other locations include the tine housing, the rear of the frame cover, the left or right side of the frame, the left or right side of the starter housing, or near the starter rope housing.

Once you have identified the model number, you can use the Cub Cadet website to search for the correct replacement part. The website offers a Part Finder tool that allows you to search for parts using either the model number or the specific part number you are replacing. Additionally, they provide a parts diagram tool where you can select the model and year of your machine and browse the parts diagrams to locate the required part.

It is worth noting that Cub Cadet also provides customer service support for those who need further assistance in finding replacement parts. Their specialists can be contacted via phone or chat during business hours to help identify the correct replacement part numbers for your specific Cub Cadet machine.

By following these steps and utilizing the resources provided by Cub Cadet, you can ensure that you find the correct replacement part numbers for your machine, allowing you to maintain and repair your equipment effectively.

Frequently asked questions

To replace the electric clutch on your Cub Cadet RZT 50, you will need to first locate the lock that keeps the PTO clutch locked in place. This could be bolted in or a rod. Once you have located this, you can remove it and replace the belt without removing the clutch.

Yes, there are a few things to keep in mind when replacing the clutch on a Cub Cadet Garden Tractor. Firstly, if your tractor has a rubber ISO-mounted engine, consider replacing the rubber mounts with solid steel motor mounts to reduce the chance of clutch parts wearing out prematurely. Secondly, when assembling the clutch components, ensure that the clutch release/throw-out bearing is installed with the collar facing towards the clutch disc.

You can find genuine Cub Cadet replacement parts on their website or at Home Depot. You will need your product's model number to find the correct replacement part.

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