Manual

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Operator's Manual

Edger

Models 521

550

551

Model 550 and 551 Shown

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 361131 Cleveland, Ohio 44!36-0019.

MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019

PRINTED IN U.S.A.

FORM NO. 769-00527B

(5/03)

Summary of content (20 pages)

PAGE 1
Operator's Manual Edger Models 521 550 551 Model 550 and 551 Shown IMPORTANT: Warning: READ SAFETY RULES AND INSTRUCTIONS This unit is equipped with an internal combustion CAREFULLY 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).
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TABLEOFCONTENTS Content Page Important Safe Operation Practices ................................................................... 3 Assembling The Edger ....................................................................................... 5 Know The Edger ................................................................................................. 6 Operating The Edger .......................................................................................... 7 Making Adjustments ..........
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SECTION1: IMPORTANT SAFEOPERATION PRACTICES WARNING: THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS WHICH, IF NOT FOLLOWED, COULD ENDANGER THE PERSONAL SAFETY AND/OR PROPERTY OF YOURSELF AND OTHERS. READ AND FOLLOW ALL INSTRUCTIONS IN THIS MANUAL BEFORE ATTEMPTING TO OPERATE THIS MACHINE. FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY. WHEN YOU SEE THIS SYMBOL -- HEED ITS WARNING.
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. Neveroperatewithdamaged safetydevices. Failuretodoso,canresultinpersonalinjury. 5. Neverrunanengineindoorsorina poorly ventilated area.Engineexhaustcontainscarbon monoxide, anodorlessanddeadlygas. 6. Donotoperatemachine whileundertheinfluence ofalcoholor drugs. 7. Mufflerandenginebecomehotandcancausea burn.Donottouch. 8. Neveroperatethismachinewithoutgoodvisibility orlight.Alwaysbesureofyourfootingandkeepa firmholdonthehandles.Walk,neverrun. 9. Donotoperatethismachineifithasbeendropped ordamaged.
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SECTION2: ASSEMBLING YOUREDGER IMPORTANT: This unit is shipped WITHOUT GASOLINE or OIL. After setting up the unit, service engine with gasoline and oil as instructed in the separate engine manual packed with your unit. Upper Handle NOTE: Reference to right or left hand side of the edger is observed from the operating position. Groundingthe Engine'sSpark Plug • Disconnect the spark plug wire from the spark plug and ground against the engine.
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SECTION3: KNOWTHEEDGER Blade Depth Control Lever (Transport Pull Rope / Recoil Starter Position Shown) Curb Height Adjustment Lever\ (If Equipped) Bevel Adjustment Primer Spindle Sheaves Belt Guard NOTE: Wheel and blade styles vary by model. Yours may differ slightly. Model 550 and 551 Shown. Figure 4 ,_ and their proper operation. how to WARNING: Be familiar withKnow all controls stop the machine and disengage them quickly.
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SECTION4: OPERATING THE EDGER The operation of any edger can result in foreign objects being thrown into the eyes, which can result in severe eye damage. Always wear safety glasses or eye shields. We recommend wide vision safety mask for over spectacles or standard safety glasses IMPORTANT:Using the primer to restart a warm engine after a short shutdown is usually not necessary. Doing so may result in a flooded engine.
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SECTION5: MAKINGADJUSTMENTS BevelAdjustment(modelssoequipped) NOTE: Edger features vary by model. Aft edger models do NOT come equipped for blade tilt adjustment nor is there a blade tilt kit available to modify your edger if it was not purchased equipped to do so. Edging Set the bevel adjustment lever (refer to Figure 5) in the center notch to place the edger blade in a 90 ° position for edging. See Figure 7.
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• Remove the spindle sheaves belt guard by removing the two self-tapping screws which secure it to the blade plate assembly. See Figure 9. Blade • Secure with the bell washer and the hex lock nut removed earlier. See Figure 11. Plate Assembly Bell Washer Edg Flat Triplex Hex Lo_ckNut Figure 11 Hex Screws Spindle Sheaves Belt Guard Note: Wheel and blade styles vary Spindle Sheaves by model. IMPORTANT: Use a torque wrench to tighten the hex lock nut to between 37 foot-lbs, and 50 foot-lbs.
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• Lowertheright,rearwheelbymovingthecurb heightadjustment leverslightlytotheleft.See • Release thecurbheightadjustment levertolock thewheelinposition.SeeFigure13. Figure 12. \ Curb/Height Adjustment Lever (Normal Operating Position) Figure 12 • Curb Pivot the right, rear wheel into an applicable position in relation to the height of the curb to be edged along.
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• • • • • With your other hand, carefully reach under the rear of the unit and remove the belt from around the • engine flywheel pulley. Remove the spindle sheaves belt guard by removing the two self-tapping screws which secure it to the blade plate assembly. See Figure 9. Use two wrenches (one wrench to prevent the hex bolt head from spinning and the other to remove the hex lock nut and bell washer) to remove the edger blade. Refer to Figure 10.
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SECTION7: OFF-SEASON STORAGE Observe the following when preparing the edger for long-term storage: • • • Clean and lubricate unit thoroughly as instructed on page 10 of this manual. Refer to the Engine Manual packed separately with the edger for engine manufacturers's storage instructions. • Store the edger in a dry, clean area. Do not store next to any corrosive materials, such as lawn fertilizer. • Coat the edger, especially any springs and bearings with a light oil or silicone spray.
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SECTION9: MODEL521/550/551HANDLE 19t 15 t4 1" \ 5 16 12 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 PART NO. 710-3103 710-0449 710-1205 710-3008 710-0606 712-3004A 720-0279 720-0142 720-0284 732-0369 736-0451 REF. DESCRIPTION PART NO. NO.
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Model521/550/551Frame 2 lO 15 7 REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 PART NO. 710-0191 710-0599 710-0654A 710-0944 712-0431 731-04168 736-0320 736-0452 736-3052 736-3090 750-04142 756-0313 756-1035A 756-1150A 787-01072 DESCRIPTION Screw, 3/8-24 Screw, 1/4-20 Screw, 3/8-16 Screw, 3/8-16 Flange Lock Nut, 3/8-16 Debris Guard Flat Washer, 3/8 ID x 1.37 OD Bell Washer,.396 x 1.140 Flat Washer,.406 x 1.00 Flat Washer,.260 x.
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Model521SpindleAssembly / 11 18 10 19 25 16 21 ! 26 23 12 14 6 V-BELTS are specially designed to engage and disengage safely. A substitute (non-OEM) V-Belt can be dangerous by not disengaging completely. REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 PART NO. 687-02019 710-0395 710-0599 710-1143A 711-1017 712-3004A 712-3027 712-3056 714-0104 718-04012 731-04158 731-04207 732-04169 736-0119 736-0187 REF. NO.
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Model550 And551SpindleAssembly 10 / 19 2O 27 16 23 18 ! 28 25 1/ "% 11/ 14 5 V-BELTS are specially designed to engage and disengage safely. A substitute (non-OEM) V-Belt can be dangerous by not disengaging completely. REF. PART NO. NO. REF. NO.
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Model521WheelAssembly 1 (Frameshownforreferenceonly) 6 10 % 1 REF. NO. 1 2 3 4 5 6 7 8 9 10 PART NO. 712-0431 732-04045 734-1987 734-1988 738-04037 738-04038 738-04039 750-0289 750-04129 787-01074 DESCRIPTION Flange Lock Nut, 3/8-16 Torsion Spring Wheel 8xl .8 Wheel 7xl .8 Shoulder Screw,.50 x 9.36, 3/8-16 Shoulder Screw,.50 x 12.90, Shoulder Screw,.50 x 3.19, 3/8-16 Spacer,.510 ID x.875 Spacer,.525 x.
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Model550 And551WheelAssembly 17 (Frameshownfor referenceonly) 2 7 \ 18 2 19 10_ 9 6 < REF. NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 PART NO. 687-02022 712-0431 732-04045 734-1987 734-1988 736-0182 736-0208 736-0232 736-0234 738-0213 738-0380 738-04036 738-04037 738-04041 750-04129 750-04165 750-0664 781-0100 787-01074 DESCRIPTION Curb Height Adjustment Lever Flange Lock Nut, 3/8-16 Torsion Spring Wheel 8xl .8 Wheel 7xl .8 Spring Washer,.500 x 1.00 Flat Washer,.51 ID x 1.
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NOTES 19
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MANUFACTURER'S LIMITED WARRANTY FOR: RD The limited warranty with respect United set forth below to new merchandise States, is given by MTD LLC purchased its possessions d. MTD LLC does not extend and used in the sold or exported and territories.