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ILLUSTRATED PARTS
MANUAL
Hydrostatic Lawn Tractor — Model Series 620
IMPORTANT
READ SAFETY RULES AND INSTRUCTIONS CAREFULLY BEFORE OPERATION
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 worki
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Model Series 620 17 15 40 39 2 4 5 19 22 16 18 29 20 1 23 24 8 21 A 14 32 3 13 27 26 33 30 1 16 7 2 23 11 12 9 6 10 34 36 A 38 35 1 37 1 2
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Illustrated Ref. Part No. Description Ref. Part No. Description Parts List No. No. 1 710-0726 Screw, 5/16-12 x .750 23 736-0176 Flat Washer, .265 x .938 x 1.20 2 710-0599 Self-tapping Screw, 1/4-20 x.5 24 747-1196 Brake/Cruise Pivot Rod 3 710-0751 Hex Cap Screw, 1/4-20 x.62 25 629-04083A* Headlight Wire Harness 4 746-04365 Throttle Control/Cable 26 731-05165A Plenum 5 725-1745 Ignition Key w/ plastic cover 27 783-04285E RH Dash Support Plate To order 725-1744 Ignition Key w/o plastic cover 28
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Model Series 620 39 16 40 28 46 46 4 1 35 41 7 14 6 15 36 48 50 13 38 26 47 31 30 29 44 9 34 28 49 17 42 C 43 27 C A 21 11 29 B 18 24 23 20 33 10 6 8 19 2 45 25 22 5 A 12 32 6 B 4
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Illustrated Parts List Ref. Part No. Description Ref. Part No. Description No. No. 1 710-0227 Screw, #8-18 x.500 26 731-1993A Cover w/ Cup Holder 2 683-04301 Lift Shaft Assembly 27 710-0451 Carriage Bolt, 5/16-18 x.750 3 736-0204 Washer, Flat, .344 x .62 x .033 28 710-0604A Self-tapping Screw, 5/16-18 x.625 4 736-0607 Lock Washer, 5/16 29 710-0895 Self-tapping Screw, 1/4-15 x.75 To order 5 712-04065 Flange Lock Nut, 3/8-16 30 731-1990 Lift Lever Cover replacement parts, 6 712-04063 Flange Lo
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Model Series 620 25 14 3 24 18 2 7 20 16 21 39 15 16 12 22 8 38 11 23 7 17 5 1 17 7 36 35 34 31 6 30 19 26 32 9 10 13 4 33 37 28 29 27 6
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Illustrated Ref. Part No. Description Ref. Part No. Description Parts List No. No. 1 710-04095 Hex Screw, 3/8-16, 1.00, Gr5 22 783-0727D Pivot Bracket, Support LH 2 710-0514 Hex Screw, 3/8-16, 1.00, Gr5 23 783-0728B Pivot Bracket, Bar 3 710-0643 Hex Screw, 5/16-18, 1.00, Gr5 24 631-04008A Steering Wheel, 13.25 4 711-1408 Link, Drag, RH 25 731-04039 Steering Wheel Cover 5 711-1409A Link, Drag, LH 26 738-1011A Shoulder Screw,.5 x 2.2, 3/8-16 To order 6 712-0214 Nut, Hex Lock, 3/8-24 27 731-05674
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Model Series 620 1 18 11 26 48 47 B 19 A 20 34 39 36 21 7 14 40 29 38 53 43 50 31 41 51 17 6 33 49 22 5 51 41 52 27 35 12 25 15 55 46 24 9 A 63 16 63 23 54 3 45 77 76 B 28 79 2 73 81 10 8 37 63 32 E 63 65 71 82 22 A 10 44 30 67 63 64 60 61 78 70 61 68 72 66 74 22 B 58 80 59 56 G 75 A 69 57 22 59 42 75
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REF. PART NO. DESCRIPTION REF. PART NO. DESCRIPTION Illustrated 1 17840 Transmission Mounting Bracket 44 747-04139 Brake Rod Parts List 2 618-04228 Wheel Hub Assembly 45 747-1149 Bypass Rod 3 618-04270A Hydrostatic Transmission 46 747-1151 Control Rod 4 629-04124* Harness Assembly 47 748-0334 Transaxle Spacer 5 710-0227 AB Screw #8-18 x 0.375 48 750-0566A Spacer,.260 x.372 x 1.030 Lg. 6 710-0502A TT Sems Screw 3/8-16 x 1.250 49 754-0461 V Belt, A x 78” Lg 7 710-0520 Hex Bolt 3/8-16 x 1.5 50 756
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Model Series 620 Illustrated Parts List 26 34 12 32 14 To order 33 replacement parts, 1 call the Customer 22 Service Line at 27 1-800-800-7310 or visit 28 www.mtdproducts.com 24 29 17 25 31 19 30 24 20 4 20 23 18 4 16 17 37 10 11 13 9 15 7 8 6 35 5 2 36 3 10
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Illustrated Ref. Part No. Description Ref. Part No. Description No. No. Parts List 1 710-1260A Screw, 5/16-18 x 0.75 20 712-04064 Nut, Flange Lock, 1/4-20 2 710-3011 Screw, 3/8-16, 2.25, Gr5 21 783-0693 Axle Bracket 3 710-04379A Screw, 7/16-20, 3.50, Gr5, Lock 22 732-04035 Spring, Compress., 1.28 x 3.125 4 712-04065 Nut, Flange Lock, 3/8-16 23 736-0222 Washer, Lock, 1/4, External 5 717-1774B PTO Clutch, Electric 24 710-0604A Screw, 5/16-18, 0.625 6 736-0277 Washer, Flat, 1.031 x 1.620 x.095 25
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0” Electric PTO Deck 10 48 49 56 6 57 21 37 11 52 46 47 32 2 13 40 37 53 A B 20 31 54 23 18 28 8 35 27 38 3 4 33 30 26 43 9 41 1 20 16 34 20 25 20 20 5 45 29 45 19 22 15 36 7 45 24 17 55 44 50 A 51 9 B 12 42 21 12
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Illustrated Parts List Ref. Part No. Description Ref. Part No. Description No. No. 30 732-0306A Spring, Compression, .531 x 1.75 1 16606 Hook, Retainer 31 732-0459B Spring, Extension, .94 x 6.74 2 618-04126A Spindle Assembly 32 732-0934 Spring, Extension, 1.5 x 5.99 3 683-0254B Hanger Bracket Assembly 4 683-04075 Weldment, 50-inch Deck 33 734-04155 Deck Wheel, 5.0 34 734-0973 Deck Wheel, 5.0 To order 5 703-3279 Chute Stop replacement parts, 35 736-0119 Washer, Lock, 5/16 6 710-0347 Screw, 3/
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4” Electric PTO Deck 13 61 9 44 55 56 15 48 2 56 5 21 37 49 54 35 36 27 54 43 62 58 17 38 24 28 18 53 13 29 22 25 32 49 41 51 11 7 34 60 40 37 27 25 33 42 52 25 3 28 24 4 12 45 1 30 10 20 19 14 6 65 13 59 67 63 14 26 8 66 50 58 13 4 16 64 39 8 14
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Illustrated Ref. Part No. Description Ref. Part No. Description No. No. Parts List 1 16606 Hook, Retainer Bracket 35 721-04041 Hose Coupler 2 618-04125A Spindle Assembly 36 731-3005 Front Roller 3 683-0254B Hanger Bracket Assembly 37 732-0306A Spring,.531OD x 1.75 4 683-04180 54” Deck Weldment 38 732-04247 Spring, Ext.,.850 Dia. x 6.415 5 683-04182 Idler Arm Assembly 39 732-0934 Spring, Ext., 1.15 Dia. x 5.99 To order 6 703-2093 Inner Rear Baffle 40 734-04155 Deck Wheel replacement parts, 7
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Kohler Twin Cylinder Engine Illustrated Parts List 7 For Choke 6 9 To order 14 replacement parts, call the Customer 8 Service Line at 1-800-800-7310 16 or visit www.mtdproducts.com 3 17 4 2 15 11 5 12 13 10 1 Ref. Part No. Description Ref. Part No. Description No. No. 10 751-0564B Muffler Deflector 1 710-0227 AB Screw #8-18 x 0.5 11 751-0644B LH Exhaust Pipe 2 710-0599 TT Screw 1/4-20 x 0.5 12 751-0645A RH Exhaust Pipe 3 710-0654A TT Screw 3/8-16 x 1.00 4 710-0726 AB Screw 5/16-12 x 0.5 1
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NOTES Use this page to make notes and write down important information. 1
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NOTES Use this page to make notes and write down important information. 19
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MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
