NOTE: An unbalanced blade will cause excessive vibration when rotating at high speeds and may cause damage to the mower and/or personal injury.

•The blade can be tested by balancing it on a round shaft screwdriver. See Figure 14. Remove metal from the heavy side until it balances evenly. It is recommended that the blade always be removed from the adapter for the best test of balance.

1.Insert screw driver through hole

2.Blade should be parallel to ground

Screw

 

 

 

 

 

 

Blade

 

 

 

 

 

 

Driver

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ground

Figure 14

•Before reassembling the blade and the blade adapter to the unit, lubricate the engine crankshaft and the inner surface of the blade adapter with light oil (or engine oil). Also lubricate the bolt holes, bolts and inner surface of the nuts.

•Install the blade adapter on the crankshaft with the “star” away from the engine. Refer to Figure 13. Place the blade with the side marked bottom (or with part number) facing away from the adapter.

•Align the blade bell support over the blade with the tabs in the holes of the blade and insert the hex bolt. Tighten the hex bolt to the torque listed in the “Blade Mounting Torque” section below.

Blade Mounting Torque

Center Bolt: 450 in. lbs. min., 600 in. lbs. max.

IMPORTANT:To ensure safe operation, all nuts and bolts must be checked periodically for correct tightness.

Deck Care

NOTE: We do not recommend the use of pressure washers or garden hose to clean your unit.These may cause damage to electric components, spindles, pulleys, bearings or the engine. The use of water will shorten life of the mower and reduce its serviceability.

•The underside of the mower deck should be cleaned after each use to prevent a buildup of grass clippings, leaves, dirt or other matter. If this debris is allowed to accumulate, it will invite rust and corrosion, and may cause an uneven discharge of grass clippings at the next cutting.

•The deck may be cleaned by tilting the mower and scraping clean with a suitable tool (make certain the spark plug wire is disconnected).

Engine

•Refer to the separate engine manual.

Lubrication

(Refer to Lubrication Chart in Figure 15.)

WARNING: Always stop engine and disconnect spark plug wire before cleaning, lubricating or doing any kind of work on lawn mower.

 

 

e

 

b

u

 

L

 

 

Lube

Lube

 

 

e

 

b

u

 

L

 

 

Lube

Figure 15: Lubrication Chart

Blade Control

•Lubricate the pivot points on the blade control handle and the brake cable at least once a season with light oil. The blade control must operate freely in both directions.

Rear & Side Discharge Doors

•The torsion springs and pivot points should be lubricated periodically with light oil to prevent any rust or binding. Door must work freely.

Wheels

•The wheels require no lubrication. However, if the wheels are removed for any reason, lubricate the surface of the axle bolt and the inner surface of the wheel with light oil. Engine oil may also be used.

Engine

•Follow engine manual for instruction and schedule of lubrication.

NOTE: When tipping the unit, empty the fuel tank and keep engine spark plug side up.

12

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Cub Cadet PR-521 manual Deck Care, Engine, Lubrication
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PR-521 specifications

The Cub Cadet PR-521 is a robust and efficient snow blower designed to handle winter weather challenges effectively. This powerful machine is specifically engineered for homeowners who need to clear snow from driveways, sidewalks, and other paved surfaces with ease and convenience. Packed with a number of impressive features and technologies, the PR-521 stands out in the market for its performance and reliability.

One of the main features of the Cub Cadet PR-521 is its strong 208cc engine. This powerful engine ensures that the snow blower can tackle heavy and wet snow without compromising performance. The engine is designed for easy starting, even in extremely low temperatures, thanks to its reliable starting system. This is particularly beneficial for users who need to start clearing snow early in the morning or during harsh weather conditions.

The PR-521 also boasts a 21-inch clearing width, allowing users to cover large areas in a short amount of time. Moreover, the 12-inch intake height enables it to effectively clear substantial snow accumulations, making it suitable for various winter conditions. The adjustable discharge chute provides the flexibility to control where the snow is thrown, ensuring that users can direct it away from driveways or walkways as desired.

Another noteworthy characteristic of the Cub Cadet PR-521 is its lightweight and compact design. Weighing under 100 pounds, it is easy to maneuver and store, making it ideal for homeowners with limited storage space. The ergonomic handle design enhances comfort during operation, reducing fatigue even during extended use.

Additionally, the PR-521 features Cub Cadet's Sure Start technology, which enhances the starting mechanism, ensuring that the snow blower is ready to go when you need it. The snow blower also has an adjustable speed transmission, providing users with six forward speeds and two reverse speeds for optimal control and ease of use in various snow removal scenarios.

Overall, the Cub Cadet PR-521 combines power, efficiency, and user-friendly features, making it a valuable addition to any homeowner's winter toolkit. With its reliability and effective snow-clearing capabilities, the PR-521 is an exceptional choice for anyone looking to tackle winter weather challenges efficiently.
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