Service, Tires, Cutting Blades, Battery

SECTION 10: SERVICE

TIRES

WARNING: Never exceed the maximum inflation pressure shown on the sidewall of the tire.

The recommended operating tire pressure is 10 psi for the rear tires and 14 psi for the front tires. Refer to the tire sidewall for exact tire manufacturer’s recommended or maximum psi. Do not overinflate. Uneven tire pressure could cause the cutting deck to mow unevenly.

CUTTING BLADES

WARNING: Be sure to shut the engine off, remove ignition key, disconnect the spark plug wire(s) and ground against the engine to prevent unintended starting before removing the cutting blade(s) for sharpening or replacement. Protect your hands by using heavy gloves or a rag to grasp the cutting blade.

WARNING: Periodically inspect the blade adapter and/or spindle for cracks or damage, especially if you strike a foreign object. Replace immediately if damaged.

The blades may be removed as follows.

•Remove the deck from beneath the tractor, (refer to DECK REMOVAL) then gently flip the deck over to expose its underside.

•Place a block of wood between the center deck housing baffle and the cutting blade to act as a stabilizer. See Figure 16.

•Use a 15/16" wrench to remove the hex flange nut that secures the blade to the spindle assembly. See Figure 16.

To properly sharpen the cutting blades, remove equal amounts of metal from both ends of the blades along the cutting edges, parallel to the trailing edge, at a 25° to 30° angle. See Figure 17.

IMPORTANT: If the cutting edge of the blade has already been sharpened to within 5/8" of the wind wing radius, or if any metal separation is present, replace the blades with new ones. See Figure 17.

It is important that each cutting blade edge be ground equally to maintain proper blade balance.

A poorly balanced blade will cause excessive vibration and may cause damage to the tractor and result in personal injury.

The blade can be tested by balancing it on a round shaft screwdriver. Grind metal from the heavy side until it balances evenly.

Hex Flange Nut	Wood Block
	Wood Block
Spindle Assembly

Figure 16

Blade Separation

Worn Blade Edge

Wind Wing

5/8"

minimum

Sharpen Edge Evenly

Figure 17

IMPORTANT: When replacing the blade, be sure to install the blade with the side of the blade marked ‘‘Bottom’’ (or with a part number stamped in it) facing the ground when the mower is in the operating position.

IMPORTANT: Use a torque wrenchto tighten blade spindle hex flange nut to between 70 ft-lbs and 90 ft-lbs

BATTERY

The battery is sealed and is maintenance-free. Acid levels cannot be checked.

WARNING: Shield eyes (e.g. goggles, face shield) and protect skin and clothing when handling battery acid or a battery containing acid.

•Always keep the battery cables and terminals clean and free of corrosive build-up.

•After cleaning the battery and terminals, apply a light coat of petroleum jelly or grease to both terminals.

•Always keep the rubber boot positioned over the positive terminal to prevent shorting.

772C0748 specifications

The Troy-Bilt 772C0748 is a powerful and versatile rotary lawn mower designed for maintaining a pristine lawn with ease. Known for its durability and efficiency, this model is tailored for homeowners who seek a reliable solution for their mowing needs.

One of the standout features of the Troy-Bilt 772C0748 is its strong engine. Equipped with a robust 159cc engine, this mower delivers impressive cutting performance and allows for efficient operation over a variety of terrains. The engine is designed for easy starting, minimizing the hassle often associated with lawn maintenance.

The mower boasts a 21-inch cutting deck, which offers a balance between maneuverability and cutting width. This size is ideal for residential lawns, allowing users to navigate through narrow paths and tight corners with ease. The cutting deck is made from durable materials, ensuring longevity and resilience against the rigors of outdoor use.

Another notable characteristic of the Troy-Bilt 772C0748 is its adjustable cutting height feature. With six different height settings, users can achieve their desired lawn length with precision. This flexibility is essential for accommodating different grass types and seasonal growth patterns, ensuring a well-maintained lawn throughout the year.

The mower’s design also prioritizes user comfort. It features an ergonomic handle that reduces strain during operation, allowing for longer mowing sessions without discomfort. The handle is also foldable, which not only saves storage space but also enhances portability.

In terms of technology, the Troy-Bilt 772C0748 incorporates a reliable grass collection system. The rear bagging capabilities allow for efficient collection of clippings, which can be easily emptied, promoting a cleaner mowing experience. The mower also has side discharge capabilities, providing options for lawn maintenance according to user preferences.

Overall, the Troy-Bilt 772C0748 combines power, efficiency, and user-friendly features, making it an excellent choice for homeowners looking to maintain their lawns effortlessly. Its durable construction, innovative technology, and thoughtful design characteristics position it as a standout option in the competitive lawn mower market. Whether tackling small patches or larger areas, the Troy-Bilt 772C0748 promises to deliver consistent performance and a beautiful, well-groomed lawn.