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Converting From Brushcutter To
Trimmer

Model No. ZR51990A

To convert from the brushcutter to the trimmer, remove the

blade, remove the brushcutter guard, attach the grass deflec-

tor, and install the trimmer head assembly.

To Remove the Blade and Brushcutter Guard

See Figure 7 and Figure 8.

Follow these steps to remove the blade and brushcutter

guard.

Align the slot in the flanged washer with the slot in the

gear head.

Place the head locking tool through the slot in the

flanged washer and gear head.

Remove the blade nut by turning it clockwise (left-

handed threads).

Remove the cupped washer and the blade.

WARNING:

Be careful when handling the blade. It is sharp.

Failure to heed this warning can result in serious

personal injury.

Remove the flanged washer from the gear shaft and

retain it for the trimmer head assembly installation.

Remove the three screws securing the brushcutter

guard.

Remove the brushcutter guard.

Note:

Store the brushcutter parts together for future

use.

To Attach the Grass Deflector

Refer to “To Attach the Straight Shaft Grass Deflector”

earlier in this manual.

To Install the Trimmer Head Assembly

See Figure 9.

Follow these steps to install the trimmer head assembly.

Align the slot in the flanged washer with the slot in the

gear head.

Insert the head locking tool through the flanged washer

and gear head.

Install the drive shaft and trimmer head assembly onto

the gear shaft by turning the drive shaft counterclock-

wise (left-handed threads).

Tighten the drive shaft securely.

Figure 7

Figure 9

Assembly

Head

Locking

Tool

Figure 8

Slot

Gear Head

Brushcutter

Guard

Flanged

Washer

Blade

Blade Nut

Slot

Cupped

Washer

Gear

Head

Trimmer

Head

Assembly

Drive

Shaft

Flanged

Washer

Содержание ZR51950A

Страница 1: ...Trimmer Brushcutter Model No ZR51950A 250000001 Up Model No ZR51970A 250000001 Up Model No ZR51990A 250000001 Up WARNING To reduce the risk of injury the user must read and understand the operator s manual Save this manual ...

Страница 2: ... brushcutter and you are not sure whether the engine is still warm set the start lever to RUN Choke Open and pull the starter cord If the engine does not start within 5 pulls refer to To Start a Cold Engine later in this manual Flooded Engine Will the engine start If not it may be flooded Relax this is easy to correct Set the start lever to RUN Choke Open Squeeze the trigger and pull the starter c...

Страница 3: ...nverting from Trimmer to Brushcutter 15 Operation 16 19 Applications 16 Mixing the Fuel 16 Filling the Tank 16 Starting the Product 17 Stopping the Product 17 Operating the Trimmer 18 Operating the Brushcutter 19 Maintenance 20 23 Emissions Maintenance Schedule 20 Cleaning the Product 20 Servicing the Product 20 Replacing the Cutting Line 20 21 Replacing the Spool 21 Checking the Fuel Cap 22 Clean...

Страница 4: ... and safely You are also responsible for training persons you allow to use the product about safe operation The Ryobi warning system in this manual identifies potential hazards and has special safety messages that help you and others avoid personal injury even death DANGER WARNING and CAUTION are signal words that identify the level of hazard However regardless of the hazard be extremely careful T...

Страница 5: ...rown or become entangled in the cutting attachment Clear the area of children bystanders and pets At a minimum keep all children bystanders and pets outside a 50 ft 15 m radius Because there still may be a risk of injury to bystanders from thrown objects bystanders should be encouraged to wear eye protection If you are approached while operating the product stop the engine and the cutting attachme...

Страница 6: ...ns that involve your safety Read the Operator s Manual Read the operator s manual before starting or operating this product Failure to follow operating instructions and safety precautions in the operator s manual can result in serious injury Wear Eye and Hearing Protection Wear eye protection which is marked to comply with ANSI Z87 1 as well as hearing protection when operating this equipment Keep...

Страница 7: ...ing power tool operation always wear safety goggles or safety glasses with side shields and when needed a full face shield We recommend Wide Vision Safety Mask for use over eyeglasses or stan dard safety glasses with side shields Always use eye protection which is marked to comply with ANSI Z87 1 WARNING SAVE THESE INSTRUCTIONS The following signal words and meanings are intended to explain the le...

Страница 8: ...easily visible to the operator and are located near any area of potential danger Replace damaged or lost labels Part No 986178 001 Part No 984032 001 50 15m Part No 985102 001 50 15m Part No 984105 001 50 15m Part No 983961 001 Shoulder Strap Part No 984240 001 OFF ON I ...

Страница 9: ... of the product provides for easy handling It is designed for comfort and ease of grasp when operating in different positions and at different angles Curved Straight Shaft Features Model No ZR51950A ZR51970A Dual Line The dual line permits more efficient cutting than a single line Grass Deflector The grass deflector helps protect you from flying debris Brushcutter Features Model No ZR51990A Blade ...

Страница 10: ...de Straight Shaft Trimmer Model No ZR51970A Front Handle Engine Trigger Handle Curved Shaft Grass Deflector Grass Barrier Engine Trigger Handle Curved Shaft Trimmer Model No ZR51950A Front Handle Straight Shaft Grass Deflector Dual Line Engine Front Handle Brushcutter Model No ZR51990A ...

Страница 11: ...ead cap screw 1 4 20 x 2 in 1 Model No ZR51950A Lock washer 1 Model No ZR51950A Flat washer 1 Model No ZR51950A Wing nut 1 Model No ZR51950A Oil Head locking tool 1 Model No ZR51990A Shoulder strap 1 Model No ZR51990A Storage cap Assembly Assembly WARNING If any parts are missing do not operate the product until the missing parts are replaced Failure to do so could result in serious personal injur...

Страница 12: ...se steps to attach the front handle 1 Remove the slotted Torx screws to separate the handle from the handle support 2 Press the handle onto the top of the upper shaft no less than 10 in 25 4 cm from the center of the trigger handle angling the handle toward the trigger handle 3 Place the handle along the upper shaft to a position that allows for comfortable operation 4 Place the handle support on ...

Страница 13: ...cket and grass barrier 4 Place the flat washer and lock washer on the hex head cap screw 5 Place the wing nut or hex nut on the hex head cap screw and turn clockwise to secure Figure 5 Figure 6 To Attach the Straight Shaft Grass Deflector Model No ZR51970A and Model No ZR51990A See Figure 6 Follow these steps to attach the straight shaft grass deflector 1 Remove the slotted hex head screw from the...

Страница 14: ... washer from the gear shaft and retain it for the trimmer head assembly installation 6 Remove the three screws securing the brushcutter guard 7 Remove the brushcutter guard Note Store the brushcutter parts together for future use To Attach the Grass Deflector Refer to To Attach the Straight Shaft Grass Deflector earlier in this manual To Install the Trimmer Head Assembly See Figure 9 Follow these ...

Страница 15: ...Follow these steps to attach the brushcutter guard 1 Place the guard onto the gear head as shown 2 Insert the three hex head screws from the bottom through the guard into the gear head 3 Tighten the screws securely and torque to 40 50 in lb To Install the Blade See Figure 13 Follow these steps to install the blade 1 Place flanged washer over the gear shaft with the hollow side toward the brushcutt...

Страница 16: ...fuel mixture carefully into the tank 4 Clean and inspect the gasket Note Replace the fuel cap if the gasket is damaged 5 Install the fuel cap and tighten it by turning it clock wise WARNING Check for fuel leaks If you find any leaks correct the problem before using the product 6 Wipe spilled fuel from the product 7 Move at least 30 ft 9 m away before starting the product Note It is normal for the ...

Страница 17: ...Slowly push the primer bulb seven times Note If restarting a warm engine do not push the primer bulb 4 Set the start lever to the START position Note If restarting a warm engine leave the choke in the RUN position 5 Pull the starter cord until the engine runs 6 Return the starter cord gently to the starter housing Do not allow the rope to snap back 7 Allow the engine to run for 15 seconds to warm ...

Страница 18: ...gure 16b Follow these steps to operate the straight shaft trimmer 1 Start the trimmer 2 Hold the trimmer at waist level with your right hand on the trigger handle and your left hand on the front handle 3 Place the product on the right side of your body with the engine behind and away from your body 4 Trim grass and weeds in a left to right motion with the line parallel to the ground Figure 16b Fig...

Страница 19: ...er tilted toward the area being cut this is the best cutting area 3 The curved shaft trimmer cuts when passing the unit from right to left the straight shaft trimmer cuts when passing the unit from left to right This will avoid throwing debris at the operator Avoid cutting in the dangerous area shown in figures 18 and 19 4 Use the tip of string to do the cutting do not force string head into uncut...

Страница 20: ...tenance replacement or repair of the emission control device and systems may be performed by any non road engine repair establishment or individual Emission Part Inspect before each use Clean every 5 hours Replace every 25 hours or yearly Clean every 25 hours or yearly X X X X X Fuel Tank Assembly Includes Fuel Lines Fuel Cap and Fuel Filter Air Filter Spark Arrester Spark Plug Replacing the Cutti...

Страница 21: ... Figure 24 Figure 21 Maintenance Inner Ring Upper Threaded Area Slotted Tab Lower Threaded Area Follow these steps to replace the spool 1 Stop the trimmer WARNING Make sure the trimmer head stops rotating when you release the trigger Contact with a rotating trimmer head could cause personal injury 2 Remove the spark plug boot See Figure 24 3 Remove the retaining cap by turning as indicated by the ...

Страница 22: ...ighten the air filter cover by turning the knob clock wise 12 Replace the spark plug boot Note Replace the air filter Part No 88048 as indi cated by the maintenance schedule Replacing the Spark Arrester See Figure 23 The spark arrester may need to be replaced after repeated use If replacement is necessary use Ryobi part number 986179001 To replace the spark arrester 1 Remove the five screws that h...

Страница 23: ... product short term 1 Clean all foreign material from the product 2 Store the product in a well ventilated place that is inac cessible to children To Store the Product Long Term If you do not intend to use the product for more than one month follow the storage procedures below Follow these steps to store the product long term 1 Drain all of the fuel from the tank into a container ap proved for gas...

Страница 24: ...w normal starting instruc tions If the engine still fails to start repeat the procedure with a new spark plug 5 Contact an authorized service dealer 1 Use fresh fuel and the correct 2 cycle oil mix 2 Clean the air filter 3 Clean the spark arrester 1 Lubricate with silicone spray 2 Install more line 3 Pull line while alternately pressing down on and releasing the retaining cap 4 Remove line from sp...

Страница 25: ...echnologies Inc product that has been altered or modified The warranty does not extend to repairs made necessary by normal wear or by the use of parts or accessories which are either INCOMPATIBLE WITH THERYOBITECHNOLOGIES INC productoradversely affect its operation performance or durability In addition this warranty does not cover A Tune ups Spark Plugs Carburetor Carburetor Adjustments Ignition F...

Страница 26: ...asonable amount of time not to exceed 30 days If you have any questions regarding your warranty rights and responsibilities you should contact a Ryobi Technologies Inc Customer Representative at 1 800 860 4050 COVERAGE Ryobi Technologies Inc warrants to the ultimate purchaser and each subsequent purchaser that your non road or small off road engine will be designed built and equipped at the time o...

Страница 27: ...s Heat Dam Gaskets FUEL TANK ASSY includes Fuel Lines X Fuel Cap X Fuel Filter IGNITION ASSY includes Spark Plug X ALL EMISSIONS RELATED PARTS ARE WARRANTED FOR ONE YEAR OR FOR THE PERIOD OF TIME PRIOR TO THE PARTS FIRST SCHEDULED REPLACEMENT WHICHEVER COMES FIRST THIS PRODUCT WAS MANUFACTURED WITH A CATALYST MUFFLER Congratulations You have made an investment toward protecting the environment In ...

Страница 28: ...ntenance contact your nearest authorized service dealer To locate your nearest authorized service dealer for this product contact us toll free at 1 800 860 4050 RYOBI TECHNOLOGIES INC 1428 Pearman Dairy Road Anderson SC 29625 Post Office Box 1207 Anderson SC 29622 1207 Phone 1 800 860 4050 www ryobitools com ...

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