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Yard Machines 12A-526L062 User Manual

Yard Machines 12A-526L062
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YARD
OPERATOR'S MANUAL
22" Self-Propelled
Mower
Model Series
520 Thru 530
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IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-
covered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with a spark arrester meeting
applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator.
In the State of California the above is required by law (Section 4442 of the California Public Resources Code). Other states may have
similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized
service dealer or contact the service department, P.O. Box 368022 Cleveland, Ohio 44136-9722.
MTD PRODUCTS INC. P.O. BOX 368022 CLEVELAND, OHIO 44136-9722
PRINTED IN U.S.A.
FORM NO. 770-10349A
(lo/oo)
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Yard Machines 12A-526L062 Specifications

General IconGeneral
Engine Type4-Cycle
Engine Displacement140cc
Cutting Width21 inches
Cutting Positions6
Wheel Size (rear)8 inches
Mulching CapabilityYes
Bagging CapabilityYes
Side Discharge CapabilityYes
Start TypeRecoil
Wheel Size (front)8 inches

Summary

Finding Model Number

Customer Support Assistance

Important Safe Operation Practices

General Operation Safety

Read manual, exercise caution, keep children away, wear safety gear, and avoid hazardous actions.

Slope Operation Safety

Mow across slopes, avoid drop-offs, and never mow on slopes greater than 15 degrees or wet grass.

Child Safety Precautions

Keep children away from mower, be alert for their presence, and never allow children under 14 to operate.

Safe Gasoline Handling

Handle gasoline with extreme care in a well-ventilated area away from ignition sources.

Service and Maintenance Safety

Stop engine, disconnect spark plug wire before service. Check parts, labels, and dispose of fluids properly.

Operator Responsibility and Warnings

Restrict use to trained persons. Follow manual instructions. Altering safety features voids warranty.

Slope Gauge Guide

Slope Operation Guidelines

Use gauge to determine safe mowing slopes. Operate walk-behind mowers across slopes, never up/down.

Assembling Your Lawn Mower

Unpacking the Mower

Remove staples, cut tape, lay carton flat, and remove packing material to unpack the mower.

Spark Plug Wire Disconnection

Disconnect the spark plug wire from the spark plug and ground it against the engine for safety.

Setting Up the Lawn Mower

Raise and secure the upper handle to the lower handle using wing nuts and bracket assemblies.

Removing Chute Retainer

Push up chute deflector and remove retainer. Lower deflector carefully to operating position.

Installing Mulching Baffle

Lift side discharge chute, insert baffle, and snap hooks over hinge pin to secure baffle.

Installing Side Discharge Chute

Slide hooks of side discharge chute under hinge pin on mulching baffle and snap into place.

Know Your Lawn Mower

Engine Controls

Refer to the separate engine manual for the location and function of engine controls.

Blade Control Handle

Located on upper handle. Must be depressed to operate. Release to stop engine and blade.

Operating Your Lawn Mower

Mower Performance Tips

Use fresh gas, connect spark plug wire, check oil, prime engine, set height, mulch if desired.

Gas and Oil Fill-Up

Service engine with gasoline and oil per engine manual. Fill tank only when engine is cool.

Pre-Start Checks

Check clutch operation by pushing and pulling mower. Ensure wheels don't lock up and drive cable is clear.

Starting the Engine

Connect spark plug wire, prime engine, stand behind mower, squeeze blade control, pull starter rope.

Mowing Best Practices

Clear lawn of debris. Mow across slopes, not up/down. Do not mow wet or excessively high grass.

Making Adjustments

Cutting Height Adjustment

Use levers on each wheel to adjust height. Ensure all wheels are at the same relative position.

Handle Height Adjustment

Lower handle by removing wing nuts, disconnecting handle, repositioning studs, and securing.

Engine Adjustments

Refer to the separate engine manual for specific engine adjustments and tuning.

Maintaining Your Lawn Mower

Maintenance Schedule

Follow the maintenance schedule for lubricating, cleaning, checking oil, changing oil, and filter replacement.

General Maintenance Recommendations

Observe safety rules, avoid altering governed speed, and maintain unit for full warranty value.

Lubrication Points

Lubricate wheels, blade control, drive clutch, chute deflector, and engine per manual instructions.

Deck Cleaning

Clean underside of mower deck after each use to prevent rust, corrosion, and maintain performance.

Blade Maintenance

Protect hands when removing blade. Use correct angle for sharpening to prevent imbalance.

Blade Balancing and Installation

Balance blade by removing metal from heavy side. Install blade with end tips up, secure with hex bolt.

Drive Belt Maintenance

Disconnect spark plug wire. Remove transmission cover, slide belt off pulleys, install new belt.

Off-Season Storage

Troubleshooting Guide

Engine Fails to Start

Check blade control, spark plug wire, fuel, fuel line, spark plug, and flooded engine causes.

Engine Runs Erratic

Check spark plug wire, fuel line, fuel tank, gas vent, fuel system, air cleaner, and carburetor.

Engine Overheats

Check engine oil level, airflow restriction, and carburetor adjustment.

Engine Idles Poorly

Check spark plug, carburetor adjustment, and air cleaner.

Excessive Vibration

Check blade looseness or imbalance, or bent cutting blade.

Mower Will Not Mulch Grass

Avoid wet or excessively high grass. Mow at a high setting first, then adjust height.

Uneven Cut

Ensure wheels are positioned correctly and blade is sharp/balanced.

Wheels Will Not Propel

Check belt installation, pulley alignment, and debris clogging the drive operation.

Manufacturer's Limited Warranty

Warranty Coverage Details

Warrants against defects for 2 years. Normal wear parts covered for 90 days or if caused by defects.

How to Obtain Warranty Service

Contact local authorized service dealer or MTD Customer Service with proof of purchase.

Warranty Exclusions

Excludes engine parts, log splitter parts, routine maintenance, and damage from misuse or alteration.

Warranty Limitations

No implied warranties beyond express period. MTD not liable for incidental/consequential damages.

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