Scag Power Equipment SVR61V-29FX manuel d'utilisation

OPERA TOR’S MANUAL Part No. 03269 Rev. 1 Printed 12/10 Printed in USA © 2010 Scag Power Equipment Division of Metalcraft of Mayville, Inc. Congratulations on owning a Scag mower! This manual contains the operating instructions and safety information for your Scag mower. Reading this manual can provide you with assistance in maintenance and adjus[...]

W ARNING F AILURE T O FOLLO W SAFE OPERA TING PRA CTICES MA Y RESUL T IN SERIOUS INJUR Y OR DEA TH. Read this manual completely as well as other man uals that came with your mow er . • AL W A YS FOLLOW OSHA APPR O VED OPERA TION. • DO NO T operate on steep slopes. • Under no circumstances should the machine be operated on slopes grea[...]

I R T able of Contents T able of Contents GENERAL INFORMA TION SECTION 1 - ................................................................................... 1 1.1 INTRODUCTION ........................................................................................................................................... 1 1.2 DIRECTION REFERENCE ......[...]

II R T able of Contents ADJUSTMENTS SECTION 6 - ................................................................................................. 20 6.1 P ARKING BRAKE ADJUSTMENT ............................................................................................................ 20 6.2 TRA VEL ADJUSTMENT ....................................[...]

1 R Section 1 INTRODUCTION 1.1 Y our mower was built to the highest standards in the industr y . Howe v er , the prolonged life and maximum efficiency of your mower depends on you follo wing the operating, maintenance and adjustment instructions in this manual. If additio nal inf or mation or service is needed, con tact y our Scag P ower Equipment [...]

2 R Section 1 SYMBOLS 1.4 SYMBOL DESCRIPTION SYMBOL DESCRIPTION Choke T ransmission P ar king Brak e 48071S Spinning Blade On/Star t Spring T ension on Idler Off/Stop Oil F alling Hazard Thrown Object Hazard F ast Slow Continuously V ariable - Linear Cutting Element - Basic Symbol 481039S Pinch P oint Cutting Element - Engage Hour meter/Elapsed Ope[...]

3 R Section 2 INTRODUCTION 2.1 Y our mo wer is only as saf e as the operator . Carelessness or operator error ma y result in ser ious bodily injur y or death. Ha za r d co n tr o l an d ac ci de n t pr even ti o n ar e dependent upon the awareness , concer n, prudence, and proper training of the personnel in v olved in the oper ation, transpor t, m[...]

4 R Section 2 DO NO T allow children to ride or play on the 3. machine, it is not a to y . Clear the area to be mow ed of objects that could be 4. pick ed up and thrown by the cutter b lades. DO NO T carr y passengers. 5. DO NO T operate the machine under the influence of 6. alcohol or drugs. If the operator(s) or mechanic(s) cannot read English 7.[...]

5 R Section 2 Star t the engine with the operator in the operating 6. position, cutter blades are disengaged, parking brak e is engaged, and the neutral le ver is in neutral. If the mower discharge e ver plugs , shut off the 7. engine, remo v e the ignition ke y , and wait f or all mov ement to stop before remo ving the obstruction. W ARNING DO NOT[...]

6 R Section 2 Tie the mow er down securely using the tie do wn 21. points located on the front and rear of the machine. See Figure 2-2 and 2-3. Secure using straps, chains, cable , or ropes. Both front and rear straps must be directed down and outw ard from machine. TIE DOWN POINT TIE DOWN POINT Front Tie Down P oints Figure 2-2. TIE DOWN POINT TIE[...]

7 R Section 2 USING A SP ARK ARREST OR 2.6 The engine in this machine is not equipped with a spar k arrestor muffler . It is in violation of Calif or nia Public Resource Code Section 4442 to use or operate this engine on or near any forest covered, br ush cov ered or grass cov ered land unless the exhaust system is equipped with a spark arrestor me[...]

8 R Section 2 SAFETY AND INSTRUCTIONAL DECALS 2.8 483407 483402 484281 483406 2009 SVR Safety Decals Molded in Fuel T ank 484075 WARNING Operation of this equipment may create sparks that can start res around d ry vegetation. A spark arrestor may be required. The operator should contact local re agencies f or laws or regulations relating to ?[...]

9 R Section 3 SPECIFICA TIONS ENGINE 3.1 General T ype ................................................................................................ Heavy Duty Industrial/Commercial Gasoline Brand ......................................................................................................................................................[...]

10 R Section 3 CUTTER DECK 3.4 T ype ...................................................................................................................... Out-F ront design with anti-scalp rollers Construction ...................................... 10-Gauge Dec k T op with 10-Gauge Spindle Suppor t, 7-Gauge (3/16") Deck Skirt T r ue Cutting W[...]

11 R Section 4 CA UTION Do not attempt to operate this mo wer unless you have read this man ual. Learn the location and purpose of all contr ols and instruments bef ore you operate this mo wer . CONTROLS AND INSTR UMENT 4.1 IDENTIFICA TION Bef ore operating the mower , f amiliarize yourself with all mow er and engine controls. Knowing the location,[...]

12 R Section 4 Left Steering Control (Figure 4-1). 6. Used to control the mower's left wheel when tr aveling f orward or re v erse. See Section 4.5 for further details regarding the mower's tr avel controls . Right Steering Control (Figure 4-1). 7. Used to control the mow er's right wheel when trav eling f orward or re verse . See Se[...]

13 R Section 4 GROUND TRA VEL AND STEERING 4.5 - IMPORT ANT - If you are not f amiliar with the operation of a machine with le ver steering and/or h ydrostatic transmissions , the steering and ground speed operations should be learned and practiced in an open area, aw ay from buildings, f ences, or obstructions. Practice until you are comf or table[...]

14 R Section 4 PUSH FOR FOR W ARD PULL BA CK FOR REVERSE “N” FOR NEUTRAL LOCK “D” FOR DRIVE NEUTRAL Forward / Re verse Controls Figure 4-2. WHILE TRA VELING FORW ARD,PULL BA CK ON RIGHT STEERING CONTROL TO STEER RIGHT WHILE TRA VELING FORW ARD , PULL BA CK ON LEFT STEERING CONTROL TO STEER LEFT Steering Controls Figure 4-3. ENGA GING THE DE[...]

15 R Section 4 T o disengage the deck drive, push the s witch in to 3. the disengage position. Alwa ys operate the engine at full throttle to properly 4. maintain cutting speed. If the engine star ts to lug down, reduce the f orward speed and allow the engine to operate at maximum RPM. HILLSIDE OPERA TION 4.7 W ARNING DO NO T operate on steep slope[...]

16 R Section 4 If the discharge chute becomes clogged, shut off 1. the engine and remov e the ignition key . Using a stick or similar item, dislodge the clogged material. Then resume nor mal mowing. MO VING MO WER WITH ENGINE 4.11 ST OPPED T o “free-wheel” or mov e the mower around without the engine r unning, place the dump v alve le vers in t[...]

17 R Section 5 CONDITION CA USE CURE STRINGERS - OCCASIONAL BLADES OF UNCUT GRASS Width of Deck SGB020 Low engine RPM Run engine at full RPM Ground speed too f ast Slow speed to adjust f or conditions W et grass Cut grass after it has dried out Dull blades , incorrect shar pening Shar pen blades Deck plugged, g rass accumulation Clean underside of [...]

18 R Section 5 CONDITION CA USE CURE U N E V E N C U T O N F L A T G RO U ND - WA V Y H I G H -L OW APPEARANCE, SCALLOPED CUT , OR ROUGH CONT OUR Width of Deck SGB020 Lift worn from blade Replace blade Blade upside down Mount with cutting edge tow ard ground Deck plugged, g rass accumulation Clean underside of deck T oo much blade angle (dec k pitc[...]

19 R Section 5 CONDITION CA USE CURE SCALPING - BLADES HITTING DI RT OR CU TT ING VER Y CLO SE T O THE GROUND Width of Deck SGB022 Low tire pressures Check and adjust pressures Ground speed too f ast Slow speed to adjust f or conditions Cutting too low Ma y need to reduce ground speed, raise cutting height, change direction of cut, and/or change pi[...]

20 R Section 6 P ARKING BRAKE ADJUSTMENT 6.1 W ARNING DO NO T operate the mower if the parking brake is not operab le. P ossible severe injur y could result. The par king brake linkage should be adjusted whene ver the parking brak e lev er is placed in the “ENGA GE” position and the parking brak e will allow the mo wer to move . If the f ollowi[...]

21 R Section 6 NEUTRAL ADJUSTMENT -NO TE- Neutral has been set by your Scag dealer at the time of set up and nor mally does not need to be adjusted. If , ho we ver , you find that the neutral has come out of adjustment, f ollow the procedure below . Be sure the dump v alves are in the run position and 1. the speed control le v er is in the neutral [...]

22 R Section 6 -NO TE- Bef ore proceeding with this adjustment, be sure that the caster wheels tur n freely and that the tire pressure in the dr iv e wheels is correct. If the tire pressure is not correct, the machine will pull to the side with the low er pressure. If at full speed the mow er pulls right, it is an 1. indication that the left wheel [...]

23 R Section 6 CUTTER DECK LEVEL The cutter deck should be le vel from side-to-side f or proper cutting performance. T o chec k f or le vel, be sure that the mow er is on a flat, lev el surf ace, the tires are properly inflated and the cutter deck is set at the most common cutting height that y ou will use. On the LH side of the machine, check the [...]

24 R Section 6 CUTTER DECK ADJUSTMENT BOL T CUTTER DECK ADJUSTMENT BOL T Cutter Deck Pitc h Adjustment Figure 6-5. CUTTER DECK HEIGHT The cutter dec k height adjustment is made to ensure that the cutter deck is cutting at the height indicated on the cutting height index gauge . T o check for proper dec k height, be sure that the mo wer is on a flat[...]

25 R Section 6 Rotate the cutter blade on the right side of the cutter 6. deck. P osition the cutter blade so it is f acing "front to back" on the machine . Check the measurement from the floor to the cutter 7. blade tip at the front and rear of the right side blade . If the measurement is not at 3", an adjustment must be made using [...]

26 R Section 6 1 2 3 4 A B 1 2 3 4 A B Custom-Cut Baffle Adjustment Mounting Slot Selected Mounting Har dware Location Slot “A” Hole 1 Hole 2 H ole 3 Hole 4 Height (inches) 3-3/4” 4-1/4” 4-3/4” 5-1/4” Slot “B” Hole 2 H ole 3 H ole 4 Height (inches) 3-1/2” 4” 4-1/2” Custom-Cut Baffle Adjustment Figure 6-7.[...]

27 R Section 6 ADJUSTMENT NUTS ADJUSTMENT NUTS Clutch Air Gap Adjustment Figure 6-10. This adjustment should be done e very 500 hours of operation or annually , whiche ver comes first. In cases where the machine is heavily used, airgap settings should be check ed more often. If the air gap is too narrow , the clutch ar mature may drag when disengag[...]

28 R Section 6 Additional weight can be added to the front of the machine if needed. See Figure 6-11. Remov e the front belt from the machine. 1. Remov e the mounting hardware securing the 2. weight(s) to the front of the machine . Add the desired weight to the machine and secure 3. using the recommended hardware . See Figure 6-11. Reinstall the fr[...]

29 R Section 6 A A B B C C D D E E F F H I J H I J G THREE MOUNTING BRACKET LOCATIONS OPERATOR CUSHION - LOW ADJUSTMENTS OPERATOR CUSHION - HIGH ADJUSTMENTS THREE OPERATOR CUSHION LOCATIONS ONE MOUNTING BRACKET LOCATION THREE OPERATOR CUSHION LOCATIONS Operator Cushion Adjustment Figure 6-12.[...]

30 R Section 7 MAINTENANCE CHART - RECOMMENDED SER VICE INTER V ALS 7.1 HOURS PROCEDURE COMMENTS BREAK-IN (FIRST 10) 8 20 40 100 200 500 X Check all hardw are for tightness X Check h ydraulic oil le vel See paragr aph 7.3 X Check belts f or proper alignment See paragr aph 6.5 X Check h ydraulic hoses f or leaks Us e extr e me ca u ti o n w he n che[...]

31 R Section 7 MAINTENANCE CHART - RECOMMENDED SER VICE INTER V ALS (CONT'D) HOURS PROCEDURE COMMENTS BREAK-IN (FIRST 10) 8 40 100 200 500 X Check hardw are for tightness X Apply grease to fittings See paragr aph 7.2 X Check h ydraulic oil le vel See paragr aph 7.3 X Change engine oil See par agraph 7.4 X Change engine oil filter See paragr ap[...]

32 R Section 7 Lubrication Fitting P oints Figure 7-1. GREASE FITTING LUBRICA TION Lubricant Inter va l Lithium MP White Grease 2125 (40 Hours/W eekly) Chassis Grease (100 Hours/Bi-weekly) Chassis Grease (200 Hours/Monthly) 2 1 5 4 4 3 5 2 1 6 6[...]

33 R Section 7 B. CHANGING HYDRA ULIC OIL The h ydraulic oil should be changed after ev er y 500 hours or annually , whiche v er occurs first. The oil should also be changed if the color of the fluid has become black or milky . A bla c k color and/ or a ra nci d odor usual ly indi cates poss ibl e ov erheating of the oil, and a milky color usually [...]

34 R Section 7 B. CHANGING ENGINE CRANKCASE OIL After the first 20 hours of operation, change the engine crankcase oil and replace the oil filter . Thereafter , change the engine crankcase oil after e ver y 100 hours of operation or monthly , whichev er occurs first. Refer to the Engine Operator’ s Manual fur nished with this mower f or instructi[...]

35 R Section 7 ENGINE FUEL SYSTEM 7.5 D ANGER T o av oid injur y from burns, allow the mo wer to cool bef ore remo ving the fuel tank cap and refueling. A. FILLING THE FUEL T ANK Fill the fuel tank at the beginnin g of each opera ting da y . For EP A Phase 2 (produced pr ior to 1/1/2011) models, fill to within one (1) inch belo w the filler neck. F[...]

36 R Section 7 ENGINE FUEL FIL TER Fuel Filter Figure 7-6. ENGINE AIR CLEANER 7.6 A. CLEANING AND/OR REPLA CING AIR CLEANER ELEMENT F or any air cleaner , the operating environment dictates the air cleaner ser vice per iods. Inspect and clean the air cleaner element after e ver y 100 hours of operation or monthly , whichev er occurs first and repla[...]

37 R Section 7 A. CHARGING THE BA TTER Y Ref er to the batter y charger’ s manual f or specific instructions. Under nor mal conditions the engine’ s alter nator will have no prob lem keeping a charge on the battery . If the battery has been completely discharged f or a long period of time , the alter nator may not be able to recharge the batter[...]

38 R Section 7 SGB033 Angle Blade Back Do Not Cut In X Must NOT Exceed 1/3 Blade Width X 30 Blade Sharpening Figure 7-7. Check the balance of the b lade. If the blades are out 2. of balance, vibration and premature w ear can occur . See your authorized Scag dealer f or blade balancing or special tools, if y ou choose to balance your own blades . C.[...]

39 R Section 7 BOD Y AND DECK 7.10 CA UTION Do not wash an y portion of the equipment while it is hot. Do not wash the engine; use compressed air . After each use, w ash the mow er and cutter deck. 1. Use cold water and automotiv e cleaners. Do not use pressure cleaners. Do not spra y electr ical components. 2. Repair damaged metal surf aces using [...]

40 R Section 7 NOTES[...]

41 R Section 8 SCA G APPRO VED A TT A CHMENTS AND A CCESSORIES. 8.1 Attachments and accessor ies manuf actured by companies other than Scag P ower Equipment are not approv ed f or use on this machine. Scag approv ed attachments and accessor ies: Mulch Plate (p/n 9288) • Hurricane Mulch (p/n 9285) • GC-4D (p/n 9054) • GC-F4 (p/n 9055)[...]

42 R Section 8 61V CUTTER DECK B B 47 A A 1 1 2 2 3 3 4 4 4 5 7 9 8 6 10 5 8 9 11 5 8 12 12 13 13 14 17 15 16 18 19 20 20 18 21 22 23 24 25 26 27 28 29 31 30 33 34 35 48 36 37 38 39 39 41 40 42 43 44 45 46 57 55 56 54 53 52 49 50 51 63 62 18 61 20 59 5 58 60 67 67 66 69 70 68 71 12 28 73 72 73 74 75 76 77 78[...]

43 R Section 8 61V CUTTER DECK Ref. No. P art No. Description Ref. No. P art No. Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 04020-09 04001-172 48926 483286 04021-09 484197 424615 04043-04 424367 483210 483215 04019-04 48224 462333 43681 04001-136 04001-62 04[...]

44 R Section 8 SVR-61V CUTTER DECK CONTR OLS 61 61 A B C C A B D D 1 2 3 5 4 8 9 10 8 8 8 12 9 42 4 14 5 8 9 12 10 8 9 8 11 6 6 7 4 11 8 13 8 8 8 10 9 12 9 5 14 4 60 59 59 59 60 21 22 20 19 15 18 16 58 17 18 15 42 44 45 46 23 30 29 61 24 25 26 28 34 27 36 37 34 33 38 39 40 21 7 23 9 12 8 10 8 9 8 41 8 32 43 31 35 37 57 46 47 48 4 52 49 50 51 52 53 [...]

45 R Section 8 SVR-61V CUTTER DECK CONTR OLS Ref. No. P art No. Description Ref. No. P art No. Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 481625-01 491616 452063 04021-07 43806 04001-52 04001-74 04019-04 04001-20 483361 484274 48540 452161 04019-06 04021-10 [...]

46 R Section 8 SVR-61V SHEET MET AL COMPONENTS B B A A C C 3 35 34 33 1 2 4 46 6 5 6 47 2 17 11 10 9 8 7 9 12 13 14 15 30 15 15 16 6 19 21 13 20 18 24 23 48 26 35 35 6 22 25 28 29 27 26 35 36 37 35 15 17 41 32 40 42 31 44 15 45 46 13 13 18 49 43 38 23[...]

47 R Section 8 SVR-61V SHEET MET AL COMPONENTS Ref. No. P art No. Description Ref. No. P art No. Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 462240 04001-06 481625-01 491616 425504 04019-02 42392 48099 48661 423308 04003-01 04029-01 04003-12 425085 04019-03 425307 04003-02 04024-03 425148 04017-05 48396[...]

48 R Section 8 SVR-61V STEERING CONTR OLS 24 A A B B 12 12 13 18 17 19 20 23 24 16 15 14 15 22 11 21 25 26 29 30 27 *28 34 33 31 32 10 35 24 36 32 39 34 40 43 41 42 44 37 38 37 38 38 11 10 9 8 11 10 9 7 6 5 4 3 1 38 38 2 24 45 SVR-36A 2011 SVR Steering Controls 34 33 31 32 SVR-36A SVR-48V SVR-52V[...]

49 R Section 8 SVR-61V STEERING CONTR OLS Ref. No. P art No. Description Ref. No. P art No. Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 *28 29 30 484093 04020-12 452118 483601 04050-05 04009-11 04009-14 452117 04021-08 04030-03 483504 04050-10 43820 462220 462221 483453-19 484092 04003-02 04003-06 481545 4253[...]

50 R Section 8 SVR-61V FUEL SYSTEM - EP A PHASE 2 (models pr oduced prior to 1/1/2011) 1 2 4 6 5 8 7 3 9 10 11 9 10 11 TO FUEL FIL TER[...]

51 R Section 8 SVR-61V FUEL SYSTEM - EP A PHASE 2 (models pr oduced prior to 1/1/2011) Ref. No. P art No. Description 1 483617 Fuel Hose, 1/4" ID (order b y inch) 2 48059-01 Clamp , Fuel Hose 3 462205 Fuel T ank Assembly - SVR-61V 4 483896 V alve, Fuel Shut Off 5 482571 Bushing, .56 Dia. Viton 6 484246 Fuel Gauge Assembly (incl. #7) 7 484242 S[...]

52 R Section 8 SVR-61V FUEL SYSTEM - EP A PHASE 3 (models pr oduced after to 1/1/2011) 1 2 4 6 5 8 7 3 9 10 11 TO FUEL FIL TER 9 10 23 T ank Purge A A To Engine Purge Po rt B B 12 13 14 14 13 14 14 14 15 16 17 18 19 20 21 22[...]

53 R Section 8 SVR-61V FUEL SYSTEM - EP A PHASE 3 (models pr oduced after to 1/1/2011) Ref. No. P art No. Description 1 483617 Fuel Hose, 1/4" ID (order b y inch) 2 48059-01 Clamp , Fuel Hose 3 462300 Fuel T ank Assembly - SVR-61V 4 483896 V alve, Fuel Shut Off 5 482571 Bushing, .56 Dia. Viton 6 484246 Fuel Gauge Assembly (incl. #7) 7 484242 S[...]

54 R Section 8 SVR-61VHYDRA ULICS AND ENGINE COMPONENTS A A B C C D D E E F G H H J J K K L L 2 3 5 3 3 3 3 3 3 5 5 5 5 5 5 3 B 6 6 5 10 9 14 8 13 11 12 4 4 7 17 18 6 54 M M 64 G F N N 7 5 3 1 15 16 19 20 46 61 68 61 68 63 22 23 60 24 25 21 24 54 52 26 25 25 22 23 32 33 36 33 34 35 37 38 39 40 41 27 28 29 31 30 51 52 50 53 55 48 58 57 58 48 42 43 5[...]

55 R Section 8 SVR-61V HYDRA ULICS AND ENGINE COMPONENTS Ref. No. P art No. Description Ref. No. P art No. Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 484219 484317 48136-13 48136-05 48811 482839 48351 462176 482571 482572 482573 482574 481507 481164 482417 482800-02 [...]

56 R Section 8 ELECTRICAL SYSTEM 20 20 1 2 3 SC AG POWER EQUIPMENT 4 5 6 7 8 9 12 10 13 14 11 17 16 18 19 20 21 16 22 23 24 25 26 27 28 15 A A[...]

57 R Section 8 ELECTRICAL SYSTEM Ref. No. P art No. Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 462240 483957 48798 48017-03 48017-04 462069 483609 483976 483975 04003-43 04021-26 483537 04001-06 04019-02 484351 482543 481637 483642 483571 48298 483629 482588 483473 462339 48126 48029-07 48029-06 04001-01 [...]

58 R Section 8 REPLA CEMENT DECALS AND INFORMA TION PLA TES 1 2 3 4 5 6 7 8 9 10 11 H e a v y - D u ty Co m m e r c i a l 481971 __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________ __________[...]

59 R Section 8 REPLA CEMENT DECALS AND INFORMA TION PLA TES Ref. No. P art No. Description 1 483402 Decal, Warning - Belt Cov er 2 483405 Decal, Warning 3 483961 Decal, Belt Cov er 4 483201 Decal, 61V 5 483407 Decal, Spinning Blades 6 48404 Decal, Metalcraft - Made in USA 7 483977 Decal, Height-of-Cut 8 483406 Decal, Warning - Knives 9 481971 Decal[...]

60 R Section 8 SVR ELECTRICAL SCHEMA TIC 20 20 PTO SWITCH KEY SWITCH ENGINE HOURMETER BRAKE INTERLOCK SWITCH CLUTCH GROUND OPERA TO R PRESENCE SWITCH 20 AMP FUSE 20 AMP FUSE NEUTRAL INTERLOCK BLUE RED WHITE GREEN YEL W/RED STRIPE BLUE RED BLACK BLACK BLACK BLACK BLUE YEL W/RED STRIPE GREEN BLACK W/RED STRIPE BLACK W/RED STRIPE BLACK YELL OW GREEN B[...]

LIMITED W ARRANTY - COMMERCIAL EQUIPMENT Any part of the Scag commercial mower manuf actured by Scag P ower Equipment and f ound, in the reasonable judgment of Scag, to be def ective in materials or workmanship , will be repaired or replaced by an Authorized Scag Service Dealer without charge for parts and labor during the per iods specified below[...]