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MTD 520/550/551/554 - page 1
Edger Models 520 5 5 0 5 5 1 5 5 4 Oper ator’ s Man ual IMPOR T ANT : READ SAFETY R ULE S AND INSTR UCTIONS CAREFULL Y MTD LLC, P .O . BO X 361131 CLEVELAND , OH IO 44136-0019 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 unle ...
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MTD 520/550/551/554 - page 2
2 TABLE OF CONTENTS FINDING MODEL NUMBER This Operator’s Manu al is an important part of your new edger. It will help you ass emble, prepare and maintain the unit fo r best performance. Please read and understand what it says. Before you star t assembling your new equipment , p lease locate the model plate on th e equipment and copy th e informat ...
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MTD 520/550/551/554 - page 3
3 SECTION 1: IMPORTANT SAFE OPERATION PRACTICES WARNING: THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS WHICH, IF NOT FOLLOWED, COULD ENDA NGER THE PERSONAL SAFE TY AND/OR PROPER TY OF YOURSELF AND OTHERS. READ AND FOLLOW ALL INSTRUCTIONS IN THIS MANUAL BEFORE ATTEMPTING TO OPERATE THIS MACHINE. FAILURE TO CO MPLY WITH TH ESE INSTRUCTIONS MAY ...
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MTD 520/550/551/554 - page 4
4 4. Never operat e with damaged safety devices. Failure to do so, can resu lt in personal injury. 5. Never run an engi ne indoors or in a poorly ventilated area. Engine exhaust contains carbon monoxide, an odo rless and deadly gas. 6. Do not op erate machin e while under th e influence of alcohol or drugs. 7. Muffler and en gine become hot and can ...
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MTD 520/550/551/554 - page 5
5 SECTION 2: ASSEMBLING YOUR EDGER IMPORT ANT: This unit is shipped WITHOUT GASOLINE or OI L. After setting up the unit, service engine with gasoline and oil as instr ucted in the separate engine manual packed with your unit. NOTE: Reference to right or left hand sid e of t he e dger is observed from the ope rating position. Positioning the Ed ger ...
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MTD 520/550/551/554 - page 6
6 SECTION 3: KNOW YOUR EDGER Figure 4 WARNING: Be familiar wi th all controls and their proper opera tion. Know how to stop the machi ne and disengage t hem quickly. NOTE: Refer to the En gine Manual packed with your edger for a detailed description of all engine-relat ed controls and components. Pull Rope / Recoil Starter The pull rope/recoil star ...
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MTD 520/550/551/554 - page 7
7 SECTION 4: OPERATING YOUR EDGER The operation of an y edger can result in foreign object s being thrown into the eyes, which ca n result in severe eye damage. Alwa ys wear safety glasses or e ye shields. We recommend wide vision safety mask for over spectacl es or standard safety glasse s WARNING: Do not lower blade if blade is over concrete, a s ...
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MTD 520/550/551/554 - page 8
8 Edging Along A Curb (models so equipped) NOTE: Edger features var y by model. All edger models do NOT come equipped to edge along a curb nor is there a curb wheel kit available to modify your edger if it was not purchased equ ipped to do so. On models so equipped, the right, rear wheel of the edger can be lowered into on e of five positions to ea ...
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MTD 520/550/551/554 - page 9
9 WARNING: Rotating cut ting blade may throw objects causing personal injury . Keep area clear of b ystanders and do not operate without guar ds in place. Beveling In order to achieve a be velled edge, set the bevel adjustment leve r (refer to Fig ure 8) in the fi rst (left hand) or third (right hand) notch to place the edger bl ade in position for ...
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MTD 520/550/551/554 - page 10
10 • Install the flat washer (part no. 736-04088) and t he triplex edger blade (part no. 781-0748) that ar e packed separa tely in the box. • Secure with the bell washer an d the hex lock nut removed earlie r. See Figure 13. Figure 13 IMPORT ANT: Use a torque wrench to tighten the hex lock nut to between 37 foot-lbs. and 50 foot-lbs. • Reinst ...
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MTD 520/550/551/554 - page 11
11 Replacing the Edger Blade WARNING: The edger blad e is sharp. Wear leather work gloves to protect your hands when working around the edger blade . WARNING: Disconnect the spark plug wire and ground against engine before performing the following steps . • Working in fro nt of the edger, loo sen the flange lock nut on top of frame, allowing t he ...
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MTD 520/550/551/554 - page 12
12 SECTION 7: OFF-SEASON STORAGE Observe the following whe n preparing the edger for long-term storage : • Clean and lubricate uni t thoroughly as instructed on page 10 of this manual. • Refer to the Engine Manual packed separately wit h the edger for engin e manufacturers’s storage instructions. • Coat the edger bla de with chassis grease ...
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MTD 520/550/551/554 - page 13
13 REF . NO . PA R T NO . DESCRIPTION 1 710-3103 Screw, 5/16-18 2 710-0449 Screw, 5/16-18 3 710-1205 Eye Bolt 4 710-3008 Screw, 5/16-18 5 710-0606 Screw 6 712-3004A Hex Lock Nut, 5/16-18 7 720-0279 Wing Nut 8 720-0142 Grip 9 720-0241 Wing Knob 10 732-0369 Compression Spring 11 736-0451 Saddle Washer,.320 ID x.93 OD 12 746-04036 Wheel Adjustment Cab ...
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MTD 520/550/551/554 - page 14
14 REF . NO . PA R T NO . DESCRIPTION 1 710-0191 Screw, 3/8-24 2 710-0599 Screw, 1/4-20 3 710-0654A Screw, 3/8-16 4 710-0944 Screw, 3/8-16 5 712-0431 Flange Lock Nut, 3/8-16 6 731-04168 Debris Guard 7 736-0320 Flat Washer, 3/8 ID x 1.37 OD 8 736-0452 Bell Washer,.396 x 1.140 9 736-3052 Flat Washer,.406 x 1.00 10 736-3090 Flat Washer,.260 x.720 11 7 ...
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MTD 520/550/551/554 - page 15
15 REF . NO . PA R T NO . DESCRIPTION 1 687-02019 Blade Plate Assembly 2 710-0395 Hex Screw, 5/16-18 3 710-0599 Self-tapping Screw, 1/4-20 4 710-1143A Hex Screw, 5/8-18 5 711-1017 Clevis Pin 6 712-3004A Hex Lock Nut, 5/16-18 7 712-3027 Hex Flange Nut, 1/4-20 8 712-3056 Jam Nut, 5/8-18 9 714-0104 Cotter Pin 10 718-04012 Bearing Cup 11 731-04158 Blad ...
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MTD 520/550/551/554 - page 16
16 REF . NO . PA R T NO . DESCRIPTION 1 687-02019 Blade Plate Assembly 2 710-0395 Hex Screw, 5/16-18 3 710-0599 Self-tapping Screw, 1/4-20 4 710-1143A Hex Screw, 5/8-18 5 712-3004A Hex Lock Nut, 5/16-18 6 712-3027 Hex Flange Nut, 1/4-20 7 712-3056 Jam Nut, 5/8-18 8 714-3010 Cotter Pin 9 718-04012 Beari ng Cup 10 731-04158 Blade Guar d 11 731-04207 ...
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MTD 520/550/551/554 - page 17
17 REF . NO . PA R T NO . DESCRIPTION 1 712-0431 Flange Lock Nut, 3/8-16 2 732-04045 Torsion Spring 3 734-1987 Wheel 8x1.8 4 734-1988 Wheel 7x1.8 5 738-04037 Shoulder Screw,.50 x 9.36, 3/8-16 6 738-04038 Shoulder Screw,.50 x 12.90, 3/8-16 7 738-04039 Shoulder Screw,.50 x 3.19, 3/8-16 8 750-0289 Spacer,.510 ID x.875 OD 9 750-04129 Spacer,.525 x.775 ...
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MTD 520/550/551/554 - page 18
18 Model 550 And 551 Wheel Assembly REF . NO . PA R T NO . DESCRIPTION 1 687-02022 Curb Height Adjustment Lever 2 712-0431 Flange Lock Nut, 3/8-16 3 732-04045 Torsion Spring 4 734-1987 Wheel 8x1.8 5 734-1988 Wheel 7x1.8 6 736-0182 Spring Washer,.500 x 1.00 7 736-0208 Flat Washer,.51 ID x 1.5 OD 8 736-0232 Wave Washer,.531 ID x.781 OD 9 736-0234 Was ...
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MTD 520/550/551/554 - page 19
19 Model 554 Wheel Assembly REF . NO . PA R T NO . DESCRIPTION 1 687-02022 Curb Height Adjustment Lever 2 712-0431 Flange Lock Nut, 3/8-16 3 732-04045 Torsion Spring 4 734-1264 Wheel 7 x 1. 75 5 734-1268 Wheel 8 x 1. 75 6 736-0182 Spring Washer,.500 x 1.00 7 736-0208 Flat Washer,.51 ID x 1.5 OD 8 736-0232 Wave Washer,.531 ID x.781 OD 9 736-0234 Was ...
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MTD 520/550/551/554 - page 20
MANUF A CTURER’S LIMITED W ARRANTY FOR: The limited warranty set forth below is given by MTD LLC with respect to new merchandise purchased and used in the United States, its poss essions and territo ries. “MTD”warrants this product ag ai nst defects in material and workmanship for a period of two (2) years commen cing on the date of original ...
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