SHARPENING OR REPLACING CHIPPER BLADE

Because the engine on this unit has a tapered crankshaft, a special impeller removal tool (part number 753-0900) is required to remove the impeller assembly. For further assistance, contact your Sears Service Center.

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

Disconnect and ground the spark plug wire.

Remove the front hubcaps, flange lock nuts, front wheels, and wave washers that attach to the pivot arm assemblies. See Figure 17.

Front Support

Brace & Lock Nut

 

Bell Washer

 

Wave Washer

 

Hubcap

Pivot Arm Assembly

 

Thrust Washer

 

Shoulder

 

Screw

Flange Lock Nut

Figure 17

Remove the shoulder screws, thrust washers, and bell washers that go through the pivot arms to the front support brace. The front support brace and lock nut can be removed at this time as well.

Remove the three screws on the upper housing that secure the nozzle cover and the nine screws that secure the lower housing to the upper housing. See Figure 18.

Housing

 

Screws

 

Nozzle

Lower Housing

Screws

Screws

 

Remove flange lock nut that secures flail screen to the lower housing. The flail screen does not have to be removed. Refer to Figure 15.

Remove the hex bolt, lock washer, and flat washer that secure the impeller assembly to the crankshaft. See Figure 19.

Upper

Housing

Chipper

Blade

Impeller

Assembly

Hex Bolt

Lock Washer

Flat Washer

Flail

Blade

BOTTOM VIEW

Figure 19

Apply lubricant to the threads of impeller removal tool and then thread the tool into the crankshaft. Stop when the impeller assembly can move on the crankshaft.

Remove the impeller assembly from the crankshaft. Unthread the impeller removal tool from the impeller assembly.

Remove the chipper blade using a 3/16" allen wrench on the outside of the blade and 1/2" wrench on the underside of impeller assembly.

Replace or sharpen chipper blade.

When sharpening blade, protect hands by using gloves and follow the original angle of grind.

Reassemble by performing the previous steps in reverse order.

Tighten blade screws to 210 - 250 in-lbs.

Tighten impeller bolt to 375 - 425 in-lbs.

NOTE: Make certain chipper blade is reassembled with the sharp edge facing upward. See Figure 20.

Flail

Chipper

Blade

Blade

 

 

Impeller

 

Assembly

Figure 20

Figure 18

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Image 16
Sears 247.77055 operating instructions Sharpening or Replacing Chipper Blade, Disconnect and ground the spark plug wire

247.77055 specifications

Sears 247.77055 is a robust tool that combines a variety of features and technologies to meet the needs of both amateur and professional users. As part of Sears' commitment to quality and durability, this particular model is designed to provide reliable performance while ensuring ease of use.

One of the main characteristics of Sears 247.77055 is its powerful motor. The high-performance motor delivers consistent power across all tasks, whether cutting, drilling, or performing intricate jobs. It ensures that the tool can handle heavy-duty applications without straining or overheating, making it ideal for long-term use in demanding environments.

In addition to its robust motor, the Sears 247.77055 incorporates advanced safety features. These include an integrated safety switch that prevents accidental starts, as well as protective guards that shield users from debris and injury. Ergonomic design is a cornerstone of this model, ensuring that the grip is comfortable and minimizes fatigue during prolonged usage.

The tool also stands out for its versatility. It comes with multiple attachments and accessories, allowing users to switch between different tasks seamlessly. From sanding and grinding to polishing and drilling, the Sears 247.77055 can tackle a vast array of projects, enhancing its value for both DIY enthusiasts and professionals.

Another important feature of the Sears 247.77055 is its compact and lightweight design. This feature makes it easy to store and transport, providing convenience for users who may need to take their tools to job sites or move them around within their workspace. The tool’s streamlined construction does not compromise on power, ensuring that the tool remains effective without being cumbersome.

Sears has also integrated state-of-the-art technologies into the 247.77055. For instance, the tool incorporates advanced cooling systems that prevent overheating during extended use, maintaining performance and extending its lifespan. Additionally, features such as variable speed settings allow users to control the power output based on the specific requirements of the task at hand.

Moreover, the Sears 247.77055 is backed by a warranty, reflecting the company’s confidence in the product's durability and reliability. Overall, the combination of performance, safety, versatility, and user-friendly design makes the Sears 247.77055 a valuable addition to any toolkit, suited for both home improvement projects and professional applications alike.