How to Change the Blades on a Cub Cadet Ultima

How to Change the Blades on a Cub Cadet Ultima

Over time, the blades on your Cub Cadet Ultima zero turn rider can become worn out or dinged. The gradual damage of the mower blades can reduce the effectiveness of your mower. Check the blades on your mower at least twice a year, at the beginning and middle of the mowing season. Check the blades more often if you mow more frequently. Here’s how to change the blades on a Cub Cadet Ultima.

Before performing any maintenance on your Cub Cadet Ultima, refer to your operator’s manual. It lists required maintenance, safety information, and instructions for your machine. Maintenance instructions vary by model, so depending on your model our instructions may vary slightly.

Begin by parking your zero turn on a flat, level surface. Turn the engine off and allow it to cool, remove the ignition key, disconnect the spark plug ignition wire to prevent accidental starting, and engage the parking brake.

Set the deck height on your Ultima to the lowest setting. Use a 3/8-inch socket or wrench to remove both belt covers from the deck.

Remove the access panel. Use the panel access tool included on Cub Cadet Ultima mowers to remove the bolt from the panel.

Remove the belt from the spindle pulleys. Use a 9/16-inch socket or wrench to pull the idler pulley arm back to release the belt tension.

Remove the belt from the idler pulleys and PTO clutch. Use both a 9/16-inch socket and wrench to loosen the idler pulley bolts.

Remove the cotter pins and deck pins from the deck. Slide the deck out from under your Cub Cadet mower. Flip the deck over to access the blades. Wear gloves for protection when working with blades.

Remove the blades. Use a block of wood and wedge it between the blade and the frame of your machine to stop the blades from rotating. Use a 15/16-inch socket or wrench to loosen the blade nuts.

Replace the blades on your Ultima and tighten the nuts. Make sure the word “bottom” or the blade part number is facing the ground when installing the blades.

Flip the deck over and slide the deck back into place under the mower. Reattach the deck and slide the deck pins back into place. Reconnect the cotter pins.

Reinstall the belt. Route the belt around the PTO clutch. Route the belt through the idler pulleys.

Use both a 9/16-inch socket and wrench to tighten both idler pulley bolts. Route the belt around the spindle pulleys. Use a 9/16-inch socket or wrench to release the tension and finish routing the belt.

Reinstall both belt covers and then reinstall the access panel and bolt. Reconnect the spark plug wires and start your Cub Cadet mower.

Use our illustrated parts diagrams to locate any replacement parts you may need for your Cub Cadet Ultima zero turn rider.

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Cub Cadet Ultima Series

Cub Cadet Ultima Series

Cub Cadet Ultima Series Zero Turn Riders are built with a two by two frame for structural strength typically found on a lot of commercial mowers, and the unique style really stands out.

Some nice features on the Cub Cadet Ultima Series are larger front and rear tires, large grips for comfort, and, instead of foam, a nice, heavy padded grip on the lap bar for a real positive feel. The lap bars are adjustable and will easily adjust for operator comfort. The padded comfort seats also maximize comfort.

The control panel makes it very easy to view your keypad, hour meter, PTO and control system. For your height of cut adjustment, the Cub Cadet Ultima Series did a nice job for your mower deck lift. Instead of a hand lift there is a foot pedal with a simple knob. The presets are easy to view for what height you want. Adjustments are made in quarter inch increments.

There are two mower series in the Cub Cadet Ultima Series. The ZT1 series mowers are powered by EZT 2200 series engines. The ZT1 uses primarily Kohler engines but there is one model with a Kawasaki engine. The ZT2 is the other series and these mowers are on the same chassis, but Cub Cadet upgraded the transmission to a EZT 2800 series. ZT2 mowers have larger front and rear tires for less turfing and better flotation. The EZT  2800s will give you a longer life. You also pick up about a half mile an hour speed, so you go from 7 mph to 7.5 mph. Armrests also come standard on ZT2 mower models.

On both the Cub Cadet ZT1 and ZT2 LED headlights and rear tow hitches some standard. The Kawasaki FR691V Series engine comes standard on all ZT2 series mowers as well as the ZT1 50-inch mower.  The FR691V delivers 23 horsepower, which is a nice upgrade over some of the base engines available in this size mower.

The ZT1 series mowers are available with a 42, 46, 50 and 54 inch cutting width while the ZT2 mowers are available with a 46, 50, 54, and 60 inch cutting width.

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