Ryobi 990r manual Cleaning and Storage, Specifications, Engine, Drive Shaft & Cutting Head

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CLEANING AND STORAGE

WARNING

Always turn off your trimmer before you clean or perform any maintenance on it.

Cleaning

Use a small brush to clean off the outside of the trimmer. Do not use strong detergents on plastic housing or handle. They can be damaged by household cleaners that contain aromatic oils such as pine and lemon, and by solvents such as kerosene. Wipe off any moisture with a soft cloth.

Storage

If the trimmer will be stored for an extended period of time, use the following storage procedure.

1.Drain all fuel from the fuel tank. Do not use fuel that has been stored for more than 60 days.

2.Start the engine and allow it to run until it stalls. This ensures that all fuel has been drained from the carbu- retor.

3.Drain the oil from the crankcase and add fresh oil. Pull the starter rope a few times to lubricate the engine.

4.Thoroughly clean the unit and inspect for any loose or damaged parts. Repair or replace damaged parts and tighten loose screws, nuts or bolts.

The unit is now ready for storage.

5.Store the trimmer in a dry, well-ventilated area, and hang with the cutting head up or place the unit flat on the floor (Fig. 53).

Fig. 53

SPECIFICATIONS

ENGINE

Engine Type

Air-Cooled, 4-Cycle

Displacement

26.2 cc

Bore

32 mm (1.30 in)

Stroke

32.6 mm (1.3 in)

Clutch Type

Centrifugal

Operating RPM

7500 rpm

Ignition Type

Electronic

Ignition Switch

Slide Switch

Spark Plug

Champion RDZ19H

Spark Plug Gap

0.635 mm (.025 in)

Fuel Tank Capacity

450 ml (16 fl oz)

Oil Capacity

100 ml (3.4 fl oz)

DRIVE SHAFT & CUTTING HEAD

Drive Shaft

Steel, 1/4"

Drive Shaft Housing

Steel Tube, Split Boom®

Operating Weight

7.78 kg (17.2 lbs)

Throttle Control

Finger-Tip Trigger

Shoulder Strap with Pad

Standard

Line Spool Diameter

102 mm (4 in)

Trimming Line Diameter

2.41 mm (.095 in)

Cutting Path Diameter

440 mm (18 in)

COLD TORQUE SPECIFICATIONS

Spark Plug

11.3-12.3 N•m (100-110

 

in•lb)

Rocker Arm Cover Screw

2.2-3.4 N•m (20-30 in•lb)

Brush Blade Lock Nut

25.3-28.1 N•m (225-250

 

in•lb)

Engine Cover Screws (Top)

1.1-1.3 N•m (10-12 in•lb)

Engine Cover Screw (Front)

1.1-1.7 N•m (10-15 in•lb)

Engine Cover Screw (Rear)

2.8-3.4 N•m (25-30 in•lb)

Air Filter Cover Screws

2.8-3.4 N•m (25-30 in•lb)

Spark Arrester

 

Screen Screw

1.7-2.2 N•m (15-20 in•lb)

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Contents 990r Introduction Table of Contents California Emission Regulations Safety WarningsFuel and PRE-OPERATIONAL Operational Other Safety WarningsSaftey Warnings for Brush Blade During USE After USESymbol Safety and International SymbolsBrushcutter Safety Adjusting the J-HANDLE Assembly InstructionsInstalling the Shoulder Strap Installing the Brush Blade Blade Locating Installing the Line SpoolMark Operating Split Boom Coupler Installing the Lower Attachment BoomRemoving the Lower Attachment Boom Recommended OIL Type OIL & Fuel InformationAdding OIL to Crankcase Initial USE Checking the OILRecommended Fuel Type Changing the OILDefinition of Blended Fuels USE of Blended FuelsThrottle Trigger STARTING/STOPPING InstructionsPosition RopeUsing the Brush Blade Adjusting the Trimming Line LengthOperating Instructions Decorative TrimmingFrequency Maintenance Required Refer to Maintenance and Repair Instructions Maintenance ScheduleCorrect Line to Use Rewinding the Existing ReelRemoving the Existing Reel Bump Knob Inner ReelInstalling a Prewound Reel Reinstalling the ReelWinding the Existing Reel Fill Plug Gear Housing ServiceScrew AIR Filter MaintenanceAir Filter Screws Choke LeverAdjusting the Carburetor Carburetor AdjustmentAir Filter Maintenance Final High Speed Mixture Needle AdjustmentLean Adjust to Midpoint Rich INSPECTING/CLEANING the MufflerRemoving Muffler Muffler Reassembly Inspection and CleaningChecking Spark Arrester Screen Torque the screw to 15-20 inlb 1.7-2.2 NmReplacing the Spark Plug Checking / Adjusting Valve to Rocker ARM ClearanceScrew Screws Rocker Arm Valve Flat Feeler Gauge Adjusting NutsSpecifications Cleaning and StorageCold Torque Specifications EngineProblem Cause Action TroubleshootingYour Warranty Rights and Obligations California Emission Control Warranty StatementLimited Two-Year Warranty

990r specifications

The Ryobi 990R is a powerful and versatile cordless tool that has gained popularity among both DIY enthusiasts and professional users alike. Designed to offer convenience and efficiency, this innovative unit is equipped with a range of features that cater to different applications.

One of the standout characteristics of the Ryobi 990R is its powerful motor. With a robust design, it delivers ample torque and speed, enabling users to tackle a variety of tasks, from cutting through tough materials to drilling precise holes. The motor is powered by a high-capacity lithium-ion battery, which is known for its longevity and quick recharge time. This ensures that users can work longer without frequent interruptions, making the 990R an ideal choice for demanding projects.

Another notable feature of the Ryobi 990R is its ergonomic design. Lightweight and easy to maneuver, the unit minimizes user fatigue, especially during extended use. The integrated rubber grip offers enhanced comfort and control, allowing for greater precision when working on intricate tasks. This commitment to user comfort makes it suitable for both novice and experienced users.

The 990R also incorporates advanced technology that enhances its performance. The unit features variable speed settings, allowing users to adjust the tool’s speed according to the task at hand, whether it’s a delicate job or a high-powered application. Additionally, the tool is equipped with a built-in LED light that illuminates the work area, ensuring visibility in dimly lit spaces and improving overall accuracy.

For added versatility, the Ryobi 990R is compatible with a wide range of attachments and accessories. This allows users to customize the tool according to their specific needs, whether they require a drill, sander, or impact driver. The quick-change chuck system further enhances efficiency, enabling users to switch between accessories in seconds.

Durability is another defining characteristic of the Ryobi 990R. Constructed with high-grade materials, it is designed to withstand demanding working conditions without compromising performance. This resilience is crucial for professionals who rely on their tools for everyday use.

In summary, the Ryobi 990R stands out in the crowded tool market due to its powerful motor, ergonomic design, advanced technologies, and durability. Whether for home improvement projects or professional applications, it offers reliability and performance that users can trust. As Ryobi continues to innovate, the 990R remains a solid choice for anyone looking to enhance their toolkit.
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