MTD 112-638A User Manual

OWNER’S

MANIJAE

22" REAR

DISCHARGE

PROFESSIONAL

ROTARY MOWER

.75

Model Number

112-638A

Important:

Read Safety Rules and

Instructions Carefully

Thank you for purchasing an

American built product.

PRINTED IN U.S.A.

FORM NO. 770-1792

INDEX

Safe Operation Practices........................................3

Assembly..................................................................4

Operation..................................................................9

Adjustments...........................................................10

Lubrication

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MTD PROFESSIONAL

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For one year from the date of original retail purchase, MTD PRODUCTS INC will either repair or replace, at its option, free of charge, F.O.B. factory or authorized service firm, any part or parts found to be defective in material or workmanship. Transportation charges for the movement of any power equipment unit or attachment are the responsibility of the pur chaser. Transportation charges for any parts submitted for replacement under this warran ty must be paid by the purchaser unless such return is requested by MTD PRODUCTS INC.

This warranty will not apply to any part which has become inoperative due to misuse, ex cessive use, accident, neglect, improper maintenance, alterations, or unless the unit has

been operated and maintained in accordance with the instructions furnished. This warran

ty does not apply to the engine, motor, battery, battery charger or component parts thereof.

Please refer to the applicable manufacturer’s warranty on these items.

Warranty service is available through your local authorized service dealer or distributor. If you do not know the dealer or distributor in your area, please write to the Customer Service

Department of MTD.

LIMITED WARRANTY

Maintenance Off-Season Storage Illustrated Parts

Repair Parts List....................................................15

Parts Information....................................Back Cover

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13 14

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The return of a complete unit will not be accepted by the factory unless prior written per mission has been extended by MTD.

This warranty gives you specific legal rights. You may also have other rights which vary from state to state.

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NOTE: The use of any accessory on this Rotary Mower other than those manufactured by the mower manufacturer is not recommended.

WARNING: DO NOT operate the mower with the chute door open unless the complete grass catcher is prop erly mounted on the mower.

WARNING:The mowershall not be operated without the protective shield on the rear of the mower in place.

NOTE: Under normal usage bag material is subject to wear and should be checked periodically. Be sure any replacement bag complies with the mower manufacturer’s recommendations.

For replacement bags, use only factory authorized replacement bag No. 764-0191.

WARNING: TO PURCHASERS OF INTERNAL COMBUSTION

ENGINE EQUIPPED MACHINERY OR DEVICES IN THE STATE OF CALIFORNIA

The equipment which you have just purchased does not have a spark arrester. If this equipment is used on any forest covered land, brush covered land, or grass covered unimproved land in the State of California,

before using on such land, the California law requires that a spark arrester be provided. In addition, spark

arrester is required by law to be in effective working order. The spark arrester must be attached to the exhaust system and comply with Section 4442 of the California Public Resources Code.

WARNING I

®c

To reduce the potential for any injury, comply with the following safety instructions. Failure to comply with the instructions may result in personal injury.

SAFE OPERATION PRACTICES FOR WALK-BEHIND MOWERS

TRAINING

1. It is suggested that this manual be read in its entirety before attempting to assemble or operate this unit. Keep this manual in a safe place for future reference and for ordering replacement parts.

2. Your rotary mower is a precision piece of power equipment, not a plaything. Therefore, exercise extreme caution at ail times.

3. Read this Owner’s Manual carefully. Be thoroughly familiar with the controls and the proper use of the equipment.

4. Never allow children to operate a power

mower. Only persons well acquainted with these rules of safe operation should be al

lowed to use your mower.

5. Keep the area of operation clear of all per sons, particularly small children and pets. Stop engine when they are in the vicinity of your mower. Although the area of operation should be completely cleared of foreign ob jects, a small object may have been over looked and could be accidently thrown by the mower in any direction and cause injury.

PREPARATION

1. Thoroughly inspect the area where the equip ment is to be used. Remove all stones, sticks, wire, bones and other foreign objects which could be picked up and thrown by the mower in any direction and cause injury.

2. Do not operate equipment when barefoot or wearing open sandals. Always wear substan tial footwear.

3. Do not wear loose fitting clothing that could get caught on the mower.

4. Check the fuel before starting the engine. Gasoline is an extremely flammable fuel. Do not fill the gasoline tank indoors, while the engine is running, or while the engine is still hot. Wipe off any spilled gasoline before start ing the engine as it may cause a fire or explo sion.

5. Disengage the self-propelled mechanism or drive clutch on units so equipped before start ing the engine.

6. Never attempt to make a wheel or cutting height adjustment while the engine is run ning.

7. Mow only in daylight or in good artificial light.

8. Never operate the equipment in wet grass. Always be sure of your footing. Keep a firm hold on the handle and walk, never run.

OPERATION

1. Do not change the engine governor settings or overspeed the engine. Excessive engine speeds are dangerous.

2. Do not put hands or feet near or under rotating parts. Keep clear of the discharge opening at all times as the rotating blade can cause in jury.

3. Stop the blade when crossing gravel drives, walks or roads.

4. After striking a foreign object, stop the

engine, remove the wire from the spark plug, and thoroughly inspect the mower for any damage. Repair the damage before restarting and operating the mower.

5. If the equipment should start to vibrate abnor

mally, stop the engine and check immediately for the cause. Vibration is generally a warning of trouble.

6. Stop the engine whenever you leave the mower, before cleaning the mower housing, and when making any repairs or inspections.

7. When cleaning, repairing or inspecting, make certain the blade and all moving parts have stopped. Disconnect the spark plug wire, and keep the wire away from the plug to prevent accidental starting.

8. Before attempting to unclog the mower or discharge chute, stop the engine and be sure the blade has stopped completely. The cut ting blade continues to rotate for a few seconds after the engine is shut off. Never place any part of the body in the blade area un til you are sure the blade has stopped rotating. Disconnect the spark plug wire and keep the wire away from the plug to prevent accidental starting.

9. Do not run the engine indoors.

10. Shut the engine off and wait until the blade comes to a complete stop before removing the grass catcher or unclogging chute.

11. Mow across the face of slopes, never up-anddown. Exercise extreme caution when chang ing direction on slopes. Do not mow ex cessively steep slopes.

12. Always disconnect electric mowers (line operated) before cleaning, repairing or ad justing.

13. Never operate mower without proper guards, plates or other safety protective devices in place.

14. Keep washout ports and other mower-housing service openings closed when mowing.

15. DO NOT OPERATE this mower with the chute

doors open, unless the complete grass catch

er is properly mounted on the mower.

MAINTENANCE AND STORAGE

1. Check the blade and engine mounting bolts at

frequent intervals for proper tightness.

2. Keep all nuts, bolts, and screws tight to be

sure the equipment is in safe working condi tion.

3. Never store the equipment with gasoline in the tank inside of a building where fumes may reach an open flame or spark. Allow the engine to cool before storing in any enclosure.

4. To reduce fire hazard, keep the engine free of grass, leaves, or excessive grease.

5. Check the grass catcher bag frequently for wear or deterioration. For safety protection, replace only with new bag meeting original equipment specifications.

FIGURE 1.

ASSEMBLY

INSTRUCTIONS

NOTE

This unit is shipped WITHOUT GAS OLINE or OIL. After assembly, see operating section of this manual for proper fuel and engine oil recom mendations.

-Contents of Hardware Pack: (See figure 1) A

Cable Ties (Fuel Tank)

(2)

Cable Ties (Throttle Control Wire)

(2)

Hex Bolt V4-20 X 1.50" Long

(1)

Lock Washer Va " I.D.

(1)

Hex Nut V4-20 Thread

(1)

Hex Bolts 5/16-18 x 1.75" Long

(2)

Lock Washers 5/16" I.D.

(8)

Hex Lock Nuts 5/16-18 Thread

(8)

Hex Bolts 5/16-18 x 1.50" Long

(4)

Hex Bolts 5/16-18 x .75" Long

(2)

Hairpin Cotters

(2)

Hose Clamp (For Fuel Line)

(1)

FIGURE 2.

Loose Contents in Carton: (See figure 2)

M (1) Fuel Tank N (1) Fuel Tank Bracket O (1) Upper Handle P (2) Upper Struts Q (2) Lower Struts R (1) Lower Handle

1. Remove the lawn mower, loose parts, hard

ware pack and literature from the carton.

Make certain all parts and literature have been removed before the carton is discarded.

2. Extend the throttle control which is attached to the mower and place on the floor. Be careful not to bend or kink control wire.

3. Place lower handle in position over weld pins

in handle mount brackets on deck. Secure by placing two hairpin cotters (K) in inner hole on

weld pins. See figure 3.

NOTE

FIGURE 3.

It may be necessary to bend the ends of the lower handle inward slightly to obtain a snug fit against the bracket mounting area.

Strut Mount

ing Bracket

FIGURE 4.

Lower Struts (Q)

4. Place the lower struts (Q) in position on strut

— mounting brackets. Secure with hex bolts (J),

lock washers (G) and lock nuts (H). See figure

4. Only tighten finger tight at this time.

FIGURE 5.

Fuel Tank Mounting

' Bracket(N)

5. Place the fuel tank mounting bracket (N) over

the lower struts. See figure 5. Place upper struts (P) in position, lining up the holes in the lower handles, fuel tank mounting bracket and upper struts. Start by hand hex bolts (I), lock washers (G) and hex lock nuts (H). Do not tighten at this time.

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