MTD 9096-334601-MT3075-MT3090-MT30775-MT30790 Parts Manuals

Download

For Parts Call 606-678-9623 or 606-561-4983

USER MANUAL

Gas String Trimmers/Brushcutters

Models : MT3075/ MT3090/MT30775/ MT30790

MT3075

MT3090

MT30775

MT30790

WARNING • PLEASE READ

For your own safety please read this manual before attempting to operate your new unit. Failure to follow instructions can result in serious personal injury. Spend a few moments to familiarize yourself with your trimmer before each use.

PN 9096-334601 Printed in Taiwan

www.mymowerparts.com

For Parts Call 606-678-9623 or 606-561-4983

INTRODUCTION 1 - GENERAL INFORMATION

PLEASE READ

Dear Customer, Thank you for purchasing a McCulloch product. With proper operation and maintenance, it will provide you with years of service. In order to make the best use of your investment, be CER-

TAIN to familiarize yourself with the contents of the ENTIRE user manual before attempting to operate and

maintain your unit. Be sure to carefully follow the step-by-step instructions in this manual to start, operate and maintain your new product. In the manual there will be the following call-outs: NOTE:, WARNING / CAUTION and WARRANTY. A NOTE: is used to convey additional information, to high- light a particular explanation, or to expand a step description.

A WARNING or CAUTION identifies a procedure which, if not undertaken or if improperly done, can result in serious personal injury and/or damage to the unit.

The (WARRANTY SYMBOL) serves notice that unless instructions or procedures are followed, any damage caused will void the warranty and repairs will be at owner’s expense. Pay particular attention to the safety precautions. They are written for your protection and contain important information you must know to safely operate your chain saw.

FOR WARRANTY OR SERVICE CONTACT THE NEAR-

EST AUTHORIZED SERVICE CENTER - LOCATE YOUR

NEAREST SERVICE CENTER BY CALLING THE TOLL

FREE NUMBER IN THIS MANUAL.

TABLE OF CONTENTS

1 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . .2

1-1. Specifications

2 GENERAL IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . .3

2-1. General Identification 2-2. Safety Features

3 SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3-1. What To Do 3-2. Brush/Grass Blade Safety Precautions 3-3. What No To Do 3-4. International Symbols

4 ASSEMBLY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . .6

4-1. “P” Handle Assembly 4-2. “J” Handle Assembly 4-3. Blade Gurd Installation 4-4. Debris Shield 4-5. Stringhead Installation 4-6. Debris Shield Installation 4-7. Blade Installation 4-8. Installing the Attachment

5 FUEL AND LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . .10

5-1. Fuel 5-2. Mixing Fuel 5-3. Fuel Mixing Table 5-4. Recommended Fuels 5-5. Fuel and Lubrication Symbols

6 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . .11

6-1. Shoulder Harness 6-2. Starting a Cold Engine 6-3. To Stop Engine 6-4. Warm Engine Start 6-5. Idling/Carburetor Adjustment

7TRIMMING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . .13

7-1. Additional Safety Precautions 7-2. Stringhead Line Release 7-3. Trimming Procedures 7-4. Cutting With Blades 7-5. Using Weed Blades 7-6. Using a Brush Blade

8 MAINTENANCE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . .15

8-1. Replacing Cutter Line 8-2. Air Filter 8-3. Fuel Cap / Fuel Filter 8-4. Carburetor Adjustment 8-5. Spark Plug 8-6. Spark Arrester Screen 8-7. Debris Shield Knife Sharpening 8-8. Storing a Unit

9TROUBLESHOOTING THE ENGINE . . . . . . . . . . . . . . . . . .19

10 PART LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

www.mymowerparts.com

For Parts Call 606-678-9623 or 606-561-4983

1-1. SPECIFICATIONS

Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Air-cooled, 2-Cycle, Chrome Cylinder

Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30cc / 1.8 ci

Dry Weight (MT3075/MT3090) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14.1 lbs. / 6.4 kg

(MT30775/MT30790) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14.3 lbs. / 6.5 kg

Fuel Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18.6 oz. / 550 ml

Drive Shaft Length (MT3075/MT3090) . . . . . . . . . . . . . . . . . . . . . . . . . .52” / 132cm

(MT30775/MT30790) . . . . . . . . . . . . . . . . . . . . . . .26” + 26” / 66cm + 66cm

Cutting Swath (Twin Line Head ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17" / 43cm

(Blade - MT3090/MT30790) . . . . . . . . . . . . . . . . . . . . . .9” / 23cm

Handle (MT3075) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .“P” Handle

(MT30775/MT3090/MT30790) . . . . . . . . . . . . . . . . . . . . . . . . . . . “J” Handle

Carburetor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Primer / Diaphragm Type

Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic

Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Champion DJ8J or equivalent

Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Clutch

www.mymowerparts.com

For Parts Call 606-678-9623 or 606-561-4983

2 - GENERAL IDENTIFICATION

MT3075

MT3075/MT30775

MT30790

MT3090/MT30790

2-1.GENERAL IDENTIFICATION

1. STRINGHEAD

2. CUTTER LINE

3. DEBRIS SHIELD

4. BLADE

5. BLADE GUARD

6. DRIVE SHAFT ASSEMBLY 7A. PHANDLE (MT3075) 7B. J HANDLE (MT3090/MT30775/ MT30790)

8. THROTTLE TRIGGER

9. IGNITION ON/OFF SWITCH

10. SAFETY TRIGGER

11. CHOKE LEVER

12. FUEL TANK

13. AIR FILTER COVER

14. STARTER HANDLE

15. MUFFLER SHIELD

16. PRIMER BULB

17. SPARK ARRESTOR SCREEN

18. HARNESS (MT3090/MT30775/ MT30790)

19. COUPLER (MT30775/ MT30790)

20. SOCKET WRENCH (MT3090/ MT30790)

21. HOLDING PIN

2-2. SAFETY FEATURES

Numbers preceding the descriptions correspond with numbers on preceding page to help you locate the safety feature.

5 BLADE GUARD must be installed to prevent debris

from spraying up into the operator and to protect the operator form rotating blade.

15 MUFFLER SHIELD helps prevent hands, body and/or

combustible materials from making contact with a hot muffler.

17 SPARK ARRESTER SCREEN retains carbon and

other flammable particles over 0.023" (.6 mm) in size from exhaust flow.

NOTE: Compliance with local, state and federal laws and/or regulations governing the use of a spark arrester screen is the user’s responsibility. See Safety Precautions (Section 3) and Maintenance Instructions (Section 8) for additional information.

www.mymowerparts.com

For Parts Call 606-678-9623 or 606-561-4983

3 - SAFETY PRECAUTIONS

3-1. WHAT TO DO

READ YOUR USER MANUAL AND ALL SUPPLEMENTS (IF ANY ENCLOSED) THOROUGHLY BEFORE OPERATING YOUR UNIT.

1. CLOTHING - Always wear heavy, long pants, boots, gloves and long sleeve shirt. Do not wear loose clothing, jewelry, short pants, sandals, or go barefoot. Secure hair so it is at shoulder level. Always wear a hard hat, a safety face shield, or safety glasses for eye protection and a good grade of ear plugs or other sound barriers for hearing protection.

2 FUELING - Mix and pour fuel outdoors where there

are no sparks and flames. Slowly remove the fuel cap only after stopping the engine. Do not smoke while fueling or mixing fuel. Wipe spilled fuel from the unit. Move at least 30 ft (9m) away from the fueling source (gas can) and site before starting unit.

3. COMPLY WITH ALL FIRE PREVENTION REGULATIONS. COMPLIANCE WITH ALL LOCAL, STATE, OR FEDERAL LAWS IN THE UNITED STATES IS THE USER’S RESPONSIBILITY.Your unit comes with a spark arrester screen. Replacement spark arrester screen kits are available at your nearest McCulloch Authorized Service Center listed under “SAWS” in your Telephone Directory Yellow Pages.

4. TURN UNIT OFF before setting it down.

5. ALWAYS HOLD UNIT FIRMLY WITH BOTH HANDS, the thumb and fingers encircling the handles.

6. KEEP ALL SCREWS AND FASTENERS TIGHT. Never operate this equipment if it is improperly adjusted or not completely and securely assembled.

7. KEEP HANDLES DRY, clean and free of fuel mixture.

8. KEEP STRINGHEAD AS CLOSE TO GROUND AS PRACTICAL. Avoid hitting small objects with stringhead. When cutting on a slope, stand below stringhead.

9. CHECK AREA YOU WILL BE TRIMMING FOR DEBRIS that may be struck or thrown during operation.

10. KEEP ALL PARTS OF YOUR BODY AND CLOTHING AWAY FROM STRINGHEAD when starting or running engine. Before starting engine, make sure stringhead will not come in contact with any obstacle.

11. STOP ENGINE before examining cutting line.

12. STORE EQUIPMENT AWAY FROM POSSIBLE IGNITION SOURCES, such as gas-powered water heaters, clothes dryers, or oil-fired furnaces, portable heaters, etc.

13. ALWAYS KEEP the debris shield, stringhead, and engine free of debris build-up.

14. OPERATION OF EQUIPMENT should always be restricted to mature and properly instructed individuals.

3-2 BRUSH / GRASS BLADE SAFETY PRE-

CAUTIONS

1. FOLLOW ALL WARNINGS and instructions regarding operation and blade installation.

2. BLADE CAN VIOLENTLY THRUST AWAY FROM MATERIAL IT CANNOT CUT - Blade thrust can cause amputation of arms or legs. Keep people and animals 50 feet (15 meters) away in all directions. If blade contacts foreign objects during operation, turn off engine and allow coasting blade to stop. Then check blade for damage. Always discard blade if it is warped or cracked.

3. BLADE THROWS OBJECTS VIOLENTLY - You can be blinded or injured. Wear eye, face, and leg protection. Always clear work area of any foreign objects before using blade. Keep people and animals 50 feet (15 meters) away in all directions.

4. INSPECT YOUR TRIMMER AND ATTACHMENTS BEFORE EACH USE - Never use unless all bladeattaching hardware is properly installed.

5. BLADE COASTS AFTER THROTTLE IS RELEASED A coasting blade can cut you or bystanders. Before performing any service on the blade, always turn off engine, and be sure coasting blade has stopped.

6. 100-FOOT (30 meters) DIAMETER HAZARD ZONE Bystanders can be blinded or injured. Keep people and animals 50 feet (15 meters) away in all directions.

3-3. WHAT NOT TO DO

1. DO NOT USE ANY OTHER FUEL than that rec-

ommended in your manual. Always follow instructions in the Fuel and Lubrication section of this manual. Never use gasoline unless it is properly mixed with 2-cycle engine lubricant. Permanent damage to engine will result, voiding manufacturer’s warranty.

2. DO NOT SMOKE while refueling or operating equipment.

3. DO NOT OPERATE UNIT WITHOUT A MUFFLER and properly installed muffler shield.

4. DO NOT TOUCH or let your hands or body come in contact with a hot muffler or spark plug wire.

5. DO NOT OPERATE UNIT IN AWKWARD POSITIONS, off balance, outstretched arms, or one-handed. Always use two hands when operating unit with thumbs and fingers encircling the handles.

6. DO NOT RAISE STRINGHEAD above ground level while unit is operating. Injury to operator could result.

7. DO NOT USE UNIT FOR ANY PURPOSES OTHER than trimming lawn or garden areas.

8. DO NOT OPERATE UNIT FOR PROLONGED PERIODS. Rest periodically.

9. DO NOT OPERATE UNIT WHEN TIRED, ILL OR UNDER THE INFLUENCE OF ALCOHOL OR DRUGS OR MEDICATION.

www.mymowerparts.com

For Parts Call 606-678-9623 or 606-561-4983

2 - SAFETY PRECAUTIONS

12. DO NOT operate your unit near or around flammable liquids or gases whether in or out of doors. An explosion and/or fire may result. Never start or run the unit inside a closed room or building, breathing exhaust fumes can kill.

13. DO NOT USE ANY OTHER CUTTING ATTACH-

MENT. Use only McCulloch replacement parts and accessories, which are designed specifically to enhance the performance and maximize the safe operation of our products. Failure to do so may cause poor performance and possible injury. Use only the stringhead supplied with this product.

other cutting attachment

will void your factory warranty and could result in serious bodily injury. (Model MT3075, MT3090)

. Use of such attachments

Do not use any

3-4.INTERNATIONAL SYMBOLS

Read the User Manual.

Use of these personal safety items is highly recommended to reduce the risk of accidental injury.

Minimum operating distance

Pump the primer bulb 10 times.

www.mymowerparts.com

For Parts Call 606-678-9623 or 606-561-4983

4 - ASSEMBLY INSTRUCTIONS

4-1. “P” HANDLE ASSEMBLY (MT3075)

1. To install handle onto unit, you will need the following components from your user kit: “P” handle (A & B), screws (C) and nuts (D). (Figure 4-1A).

2. Install the handle (B) on the shaft 160-200mm from throttle and tighten the 2 screws (C) and nuts (D).

4-1A

4-2. “J” HANDLE ASSEMBLY (MT3090/

MT30775/MT30790)

1. To install handle onto unit, you will need the following components from your user kit: “J” handle (A), middle clamp housing (B), upper and lower clamps (C) and screws (D). (Fig. 4-2A)

2. Install the middle clamp housing (B) on the shaft near the arrows on the sticker (warning label E ), put the lowerclamp (C) under shaft and tighten with 2 screws (D).

3. Install the J handle (A) on the middle clamp housing, then put the upper clamp (C) over J-handle and tighten the other 2 screws (D).

3. Reinstall the gear collar (A). Ensure the collar spacer (C) is in place or the collar will rub the gear housing (Figure 4-3A).

4-3A

4-3B

4-4. DEBRIS SHIELD (MT3090/MT30790)

1. Remove gear collar (A) from the threaded gear housing shaft. Insure collor spacer (C) is in place (Figure 4-4A).

2. Install debris shield with 3 screws (B) provided in the hardware bag. (Figure 4-4B)

4-2A

4-3. BLADE GUARD INSTALLATION

(MT3075/MT30775)

1. Remove gear collar (A) from the threaded gear housing shaft (Figure 4-3A).

2. Place the shield on the gear housing and align the mounting holes. Insert screws (B), found in the hardware bag as shown in illustration and tighten securely (Figure 4-3B).

www.mymowerparts.com

4-4A

4-4B

For Parts Call 606-678-9623 or 606-561-4983

4 - ASSEMBLY INSTRUCTIONS 4 - ASSEMBLY INSTRUCTIONS

4-5. STRINGHEAD INSTALLATION

1. Install gear collar (A) ensuring that collar spacer (B) is in place (Figure 4-5A).

2. Insert holding pin (C) and thread stringhead onto shaft. Tighten stringhead by hand only (Figures 4-5B and 45C).

MT3075/ MT30775

MT3090/ MT30790

MT3075/ MT30775

MT3090/ MT30790

MT3075/ MT30775

MT3090/ MT30790

4-5A

4-5C

4-6. DEBRIS SHIELD INSTALLATION

(MT3090/MT30790)

1. Turn the unit over and with screws found in the hardware bag install the debris shield (A) as shown (Figure 4-6A).

CAUTION

Debris shield must be installed to properly dispense cutter line and protect operator.

REMINDER

Be sure to remove holding pin before starting unit.

MT3090/MT30790

4-5B

www.mymowerparts.com

4-6A

+ 18 hidden pages

MTD 9096-334601-MT3075-MT3090-MT30775-MT30790 Parts Manuals

Specifications and Main Features

Frequently Asked Questions

User Manual