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 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 44136-0019.
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard
equipment.
3
Page 4
Model Series 620
40
38
36
1
16
46
46
41
7
15
A
B
B
A
C
C
44
43
28
29
9
26
50
28
6
35
4
27
21
11
23
32
5
25
45
6
49
31
47
13
34
30
39
24
19
18
6
2
29
33
12
8
22
17
20
10
42
48
14
4
Page 5
Illustrated
Ref.
Part No.Description
No.
1710-0227Screw, #8-18 x.500
2683-04301Lift Shaft Assembly
3736-0204Washer, Flat, .344 x .62 x .033
4736-0607Lock Washer, 5/16
5712-04065Flange Lock Nut, 3/8-16
6712-04063Flange Lock Nut, 5/16-18
7725-1439Inner Seat Spring Switch
8714-0104Hairpin Clip
9726-3046Foot Pad Clips
10716-0106AE-Ring
11720-0311Handle Grip
12732-0874Torsion Spring
13732-1184Extension Spring,.84 x 4.6
14736-0242Flat Washer
15726-0278Insulator Boss Plate
16736-0300Flat Washer, .406 x .875 x .059
17710-0599Screw, 1/4-20 x.500
18738-0138AHex Cap Screw, 5/16-18 x.62
19738-0380Shoulder Screw, 3/8-16
20741-0225Hex Flange Bearing
21712-0271Sems Nut 1/4-20
22746-0968Lift Cable, 16.16
23747-04447Lift Handle
24756-1154Roller Pulley
25783-0678BArm Lift
Ref.
Part No.Description
No.
26731-1993ACover w/ Cup Holder
27710-0451Carriage Bolt, 5/16-18 x.750
28710-0604ASelf-tapping Screw, 5/16-18 x.625
29710-0895Self-tapping Screw, 1/4-15 x.75
30731-1990Lift Lever Cover
31738-0296Shoulder Screw,.437 x.286
32736-3078Flat Washer,.349 x 1.0 x.063
33783-0677BLift Adjustment Bracket
34783-04459A Fender 4 Sty Hydro w/ Flares
35783-1489CSeat Mounting Bracket
36720-04061Knob, 3 /8-16 x .875
37712-04064Flange Lock Nut, 1/4-20
38738-04012A Shoulder Screw, 3/8-16 .625 x .145
39757-04003A High Back Seat, Black
40783-04081B Seat Pivot Bracket
41725-1303Outer Seat Spring Switch
42710-0932Carriage Screw 1/4-20 x 1.00
43735-0656RH Foot Pad
44735-0657LH Foot Pad
45714-0111Cotter Pin
46726-0279Insulator Plate
47783-0209DSeat Lift Bracket
48726-0201Speed Clip
49731-2618RH Fender Flare
50731-2619LH Fender Flare
Parts List
To order
replacement parts,
call the Customer
Service Line at
1-800-800-7310
or visit
www.mtdproducts.com
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard
equipment.
5
Page 6
Model Series 620
31
15
7
2
16
21
22
20
11
27
29
28
37
33
30
6
32
13
36
35
34
17
1
17
7
18
14
24
19
9
26
10
7
23
16
3
25
12
8
5
4
39
38
6
Page 7
Ref.
No.
20741-0656AHex Flange Bearing 5/8 PM
Part No.Description
1710-04095Hex Screw, 3/ 8-16, 1.00, Gr5
2710-0514Hex Screw, 3/8-16, 1.00, Gr5
3710-0643Hex Screw, 5/16-18, 1.00, Gr5
4711-1408Link, Drag, RH
5711-1409ALink, Drag, LH
6712-0214Nut, Hex Lock, 3/8-24
7712-04065Nut, Flange Lock, 3 /8-16
8712-0459Nut, Flange Lock, 7/16-20
9712-3004ANut, Flange Lock, 5/16-18, Gr5
10712-0240Nut, Jam, 7/16-20, Gr2
11717-1550EGear, Steering, 11/90 Ratio
12717-1554Gear, Pinion, Steering
13723-0448ABall Joint, 7/16-20, Lock
14736-3004Washer, Flat,.406 x.875 x.105
15736-3084Washer, Flat,.51 x 1.12 x.06
16710-1260AScrew, 5/16-18, 0.750
17738-04154Spacer, Shoulder,.38 x 1.00 x.31
18738-1001AShaft, Steering,.625 OD x 24.25
19741-0475Plastic Bushing.380 ID
21783-0726EPivot Bracket, Support RH
Ref.
No.
30719-04105Cast Iron Pivot Bar
34711-0332Pin, Clevis,.50 x.78
35714-04023Cotter Pin, Int., .080 x 1.5625
36783-0720AAdjustment Bracket, Front
38738-0143Screw, Shldr,.498 x.340, 3/8-16
Part No.Description
22783-0727DPivot Bracket, Support LH
23783-0728BPivot Bracket, Bar
24631-04008ASteering Wheel, 13.25
25731-04039Steering Wheel Cover
26738-1011AShoulder Screw,.5 x 2.2, 3/8-16
27731-05674Cap
28736-04228Flat Washer, .781 x 1.589
29714-04039Cotter Pin, 5/32 x 1.25
31726-0341Push Cap
32638-04003A LH Axle Assembly,.750
33638-04004A RH Axle Assembly,.750
37634-04086Wheel Assembly Complete,
734-1731Tire Only 15 x 6 x 6 Sq. Shldr.
634-04081Rim Only w/ Valve Stem
39712-0431Flange Lock Nut, 3/8-16
Illustrated
Parts List
To order
replacement parts,
call the Customer
Service Line at
1-800-800-7310
or visit
www.mtdproducts.com
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard
equipment.
7
Page 8
Model Series 620
A
A
B
B
B
A
A
G
E
47
18
1
6
36
19
26
52
57
22
75
75
21
14
29
20
39
7
50
33
49
40
43
41
31
51
17
51
53
38
15
12
34
11
48
46
45
82
68
78
69
28
44
56
58
59
59
10
54
10
22
63
76
77
63
73
81
79
65
63
63
71
64
74
70
63
22
66
67
32
30
23
42
16
25
60
61
61
72
80
24
27
9
3
2
8
37
5
55
35
22
41
8
Page 9
REF. PART NO.DESCRIPTION
117840Transmission Mounting Bracket
2618-04228Wheel Hub Assembly
3618-04270AHydrostatic Transmission
4629-04124*Harness Assembly
5710-0227AB Screw #8-18 x 0.375
6710-0502ATT Sems Screw 3/8-16 x 1.250
7710-0520Hex Bolt 3/8-16 x 1.5
8710-0627Screw, 5/16-24 x.750
9710-0653TT Screw 1/4-20 x 0.5
10710-0726AB Screw 5/16-12 x 0.75
11710-0778Screw, 1/4-20 x 1.50
12710-1007Screw, 3/8-16 x 1.50
13710-1266Hex Bolt 5/16-18 x 3.5
14710-3007Carriage Screw
15710-3011Hex Bolt 3/8-16 x 2.25
16711-0832Ferrule
17712-0240Jam Nut 7/16-20
18712-04063Flange Lock Nut, 5/16-18
19712-0431Flanged Lock Nut 3/8-16
20712-3017Flanged Lock Nut 3/8-16
21712-3066Hex Nut, 1/2-20
22714-0111Cotter Pin
23714-0507Cotter Pin
24725-0157
25725-1644Switch
26726-0154
27726-0320Insulator Nut Plate
28731-05300Sleeve, .765 x 2.410 Lg.
29731-1449ABlade Fan
30732-0209Extension Spring
31732-04323BExtension Spring
32732-0716CExtension Spring
33732-0729Wire Ring
34732-0994Extension Spring
35732-3118Extension Spring
36736-0169Lock Washer
37736-0242Bell Washer,.340 x.872 x.060
38736-0258Flat Washer,.385 x 1.0 x .135
39736-0300Flat Washer
40736-0921Lock Washer
41736-3010Flat Washer
42712-3050Lug Nut 7/16-14
43738-0372BShoulder Spacer
Cable Tie
Cable Tie
(Not shown)
(Not shown)
REF. PART NO.DESCRIPTION
44747-04139Brake Rod
45747-1149Bypass Rod
46747-1151Control Rod
47748-0334Transaxle Spacer
48750-0566ASpacer,.260 x.372 x 1.030 Lg.
49754-0461V Belt, A x 78” Lg
50756-04111Input Pulley
51756-04209Idler Pulley
52756-04224Flat Idler Pulley
53783-04442Idler Bracket
54783-0810BTorq Bracket
55783-1019BActuator Bracket
56647-0049AHydrostatic Control Assembly
57647-04100Brake Control Assembly
58683-0267CPedal Assembly
59710-1260ALD Screw 5/16-18 x 0.75
60711-04159BPin
61712-04065Flange Lock Nut, 3/8-16
62712-3004AFlange Lock Nut, 5/16-18
63714-0104Pin, Cotter
64732-0335Compression Spring
65732-0955Extension Spring
66732-0963Extension Spring
67735-0662Control Pedal
68735-3049ABrake Control Pedal
69736-0119Lock Washer 5/16
70736-0187Flat Washer,.64 x 1.24 x.06
71736-0262Flat Washer, .385 x .870 x .092
72738-0155Shoulder Screw
73738-0380Shoulder Screw
74741-0225Hex Flange Bearing
75741-3065BHex Flange Bearing
76747-04093ABrake Lock Control Rod
77747-04096Cruise Control Rod
78747-04641Brake Pedal
79748-04039CCruise Latch
80783-04612Steering Support Bracket
81783-0663EHydro Lockout Bracket
82634-0104Wheel Complete, 20 x 8 x 8
734-1730Tire Only, 20 x 8 x 8
634-0070Rim Only
734-0255Tubeless Air Valve
*Not Shown
Illustrated
Parts List
To order
replacement parts,
call the Customer
Service Line at
1-800-800-7310
or visit
www.mtdproducts.com
NOTE: Tractor features vary
by model. NOT all parts
listed above and pictured
on the previous page are
standard equipment.
9
Page 10
Illustrated
27
17
29
30
31
33
20
34
12
22
1
14
32
26
4
20
23
28
24
24
18
19
25
16
4
15
17
5
6
8
9
10
37
11
13
2
35
3
36
7
Parts List
Model Series 620
To order
replacement parts,
call the Customer
Service Line at
1-800-800-7310
or visit
www.mtdproducts.com
10
Page 11
Ref.
No.
1710-1260AScrew, 5/16-18 x 0.75
2710-3011Screw, 3/ 8-16, 2.25, Gr5
3710-04379A Screw, 7/16-20, 3.50, Gr5, Lock
4712-04065Nut, Flange Lock, 3/8-16
5717-1774BPTO Clutch, Electric
6736-0277Washer, Flat, 1.031 x 1.620 x.095
7748-0415BSpacer,.385 ID x.635 OD x 1.54
8756-0978BPulley, Engine, 3.56 Diameter
9783-04419B Clutch Bracket
10783-04467A Deck Bracket, Up-Stop
11725-04039Switch
12712-0271Nut, Sems, 1/4-20
1317962Switch Plate
14725-1750ABattery, 235 CCA
15710-0224AB Screw, #10-16 x.500
16683-04173B Frame Assembly, Lower
17710-0607Screw, 5/16-18, 0.500
18710-0642Screw, 1/4-20, 0.750
19710-3005Screw, 3/8-16, 1.25, Gr5
Part No.Description
Ref.
20712-04064Nut, Flange Lock, 1/4-20
21783-0693Axle Bracket
22732-04035Spring, Compress., 1.28 x 3.125
23736-0222Washer, Lock, 1/4, External
24710-0604AScrew, 5/16-18, 0.625
25738-04058Spacer, Shoulder,.38 x 1.0 x.70
26747-04121AHold Rod, Battery
27783-0349Battery Tray
28783-04329A Seat Bracket, Frame
29783-04809D Frame, Upper
30710-0599Screw, 1/4-20, 0.50
31725-04439Solenoid, 12V, 100 Amp
32738-1132Screw, Shoulder,.250 x.15, 1/4-20
33710-04666Hex Flange Bolt, 1/4-20,.75
34712-3087Nut, Wing, 1/4-20
35783-04612Support Bracket, Steering
36736-0171Lock Washer, 7/16
37710-0726Screw, 5/16-12 x .750
Part No.Description
No.
Illustrated
Parts List
To order
replacement parts,
call the Customer
Service Line at
1-800-800-7310
or visit
www.mtdproducts.com
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard
equipment.
11
Page 12
50” Electric PTO Deck
A
B
A
B
10
20
29
45
45
37
9
42
6
37
47
4
21
16
33
25
22
21
56
23
49
28
38
18
52
5
20
20
41
19
36
40
13
8
35
31
32
48
27
7
15
12
1
9
20
34
20
2
57
53
46
11
3
30
26
54
43
17
45
24
44
50
51
55
12
Page 13
Illustrated
Ref.
116606Hook, Retainer
2618-04126A Spindle Assembly
3683-0254BHanger Bracket Assembly
4683-04075Weldment, 50-inch Deck
5703-3279Chute Stop
6710-0347Screw, 3/8-16, 1.75
7710-04095Screw, 3/8-16 x 1.0
8710-0528Screw, 5/16-18, 1.25, Gr5
9710-0599Screw, 1/4-20 x 0.5
10710-0607Screw, 5/16-18 x .75
11710-0726Screw, 5/16-12 x .750
12710-1260AScrew, 5/16-18 x .75
13710-3005Screw, 3/8-16, 1.25
14710-3103Screw, 5/16-18 x 2.00
15710-3178Screw, Carriage, 3/8-16 x .75
16711-1737Roller Pin
17712-0206Hex Nut, 1/ 2-13
18712-0229Push Nut Retainer
19712-04063Nut, Nylon Lock, 5/16-18
20712-04065Nut, Nylon Lock, 3/8-16
21712-0417ANut, Hex, Flange, 5/8-18
22712-0641Nut, Hex, M16-1.5
23712-3010Nut, Hex, 5 /16-18, Gr5
24712-3083Hex Lock Nut, 1/2-13
25714-0111Pin, Cotter, 3/32 x 1.00
26714-0470Pin, Cotter, 1/8 x 1.25
27717-04074Deck Adjustment Gear
28721-04041Coupler, Hose
29731-3005Roller
Part No.Description
No.
Ref.
30732-0306ASpring, Compression, .531 x 1.75
31732-0459BSpring, Extension, .94 x 6.74
32732-0934Spring, Extension, 1.5 x 5.99
33734-04155Deck Wheel, 5.0
34734-0973Deck Wheel, 5.0
35736-0119Washer, Lock, 5/16
36736-0225Lock Washer, 5/8”
37736-0300Washer, Flat, .406 x .875 x .059
38737-04003C Port, Water
39738-0373Shoulder Screw
40738-04162A Spacer, Shoulder, .884 x .190
41738-3056Shoulder Screw
42742-04053B Blade, 17.90
43747-1116Rod, Deck Release .375 Dia.
44747-1324Rod, Deck Adjust
45750-0151Spacer, .550 x .750 x 1.125
46754-04077Belt, V-Type, Aramid
47756-04129Pulley, Idler, 3.5”
48783-04399LH Belt Cover
49783-04400RH Belt Cover
50783-04414A Deck Skirt, Center
51783-04415Deck Skirt, RH
52783-04462Lift Bracket, 50”
53783-05303Idler Bracket
54631-04070A Chute Assembly, Side Discharge
55731-04651Mulch Plug
56756-04216Pulley, 5.39”
57736-0315Washer, Flat, .760 x 1.5 x .120
Part No.Description
No.
Parts List
To order
replacement parts,
call the Customer
Service Line at
1-800-800-7310
or visit
www.mtdproducts.com
IMPORTANT
For a proper working
machine, use Factory
Approved Parts.
V-belts are designed to
engage and disengage
safely. A substitute
(non OEM) V-belt can
be dangerous by not
disengaging completely.
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard
equipment.
13
Page 14
54” Electric PTO Deck
26
10
67
65
63
66
64
50
14
30
4
3
52
27
37
1
12
13
59
24
28
25
42
34
11
40
49
43
29
17
38
18
41
35
49
37
5
27
24
62
61
13
44
55
56
58
53
32
22
28
60
21
25
7
51
13
56
48
6
45
33
16
58
4
39
8
8
25
20
2
15
9
13
14
19
36
54
54
14
Page 15
Ref.
Part No.Description
No.
116606Hook, Retainer Bracket
2618-04125A Spindle Assembly
3683-0254BHanger Bracket Assembly
4683-0418054” Deck Weldment
5683-04182Idler Arm Assembly
6703-2093Inner Rear Baffle
7703-3279Chute Deflector Stop
8710-0216Screw, 3/8-16 x.75
9710-0347Screw, 3/8-16 x 1.75
10710-04095Screw, 3/ 8-16 x 1.0
11710-0528Screw, 5/16-18 x 1.25
12710-0599Screw, 1/4-20 x.500
13710-0607Screw, 5/16-18 x.500
14710-0623Screw, 3/8-16 x.750
15710-0650Screw, 5/16-18 x.875
16710-0726Screw, 5/16-12 x.750
17710-1260AScrew, 5/16-18 x.750
18710-3103Screw, 5/16-18 x 2.00
19710-3168Bolt, Carriage, 3 /8-16 x 1.00
20710-3178Bolt, Carriage, 3/8-16 x.750
21711-1737Pin, Roller,.5” Dia. x 10.06
22712-0206Nut, Hex, 1/ 2-13
23712-0229Push Nut, 3/8
24712-04063Nut, Flange Lock, 5/16-18
25712-04065Nut, Flange Lock, 3/8-16
26712-0417ANut, Flange, 5/ 8-18
27712-0431Nut, Flange Lock, 3/8-16
28712-0641Nut, Hex, M16-1.5
29712-3010Nut, Hex, 5/16-18
30712-3022Nut, Hex Lock, 1/2-13
31712-3083Nut, Hex Lock, 1/ 2-13
32714-0111Pin, Cotter, 3/32 x 1.00
33714-0470Pin, Cotter, 1/8 x 1.25
34717-04074Deck Adjustment Gear
Ref.
Part No.Description
No.
35721-04041Hose Coupler
36731-3005Front Roller
37732-0306ASpring,.531OD x 1.75
38732-04247Spring, Ext.,.850 Dia. x 6.415
39732-0934Spring, Ext., 1.15 Dia. x 5.99
40734-04155Deck Wheel
41736-0119Washer, Lock, 5/16
42736-0225Washer, Lock 5/8 Int. Tooth
43736-0275Washer, Flat,.344 x.688 x.065
44736-0300Washer, Flat,.406 x.875 x.059
45736-0921Washer, Lock, 1/2
46736-3010Washer, Flat, .407 x .812 x .135
47737-04003B Port, Water
48738-1229AScrew,.625 x 2.50 x 1/2-13
49738-3056Bolt, Shoulder, 3/ 8-16; 4.96 x 2.50
50742-0677ABlade, 18.5”
51747-04384Upstop Rod
52747-1116Rod, Deck Release Handle
53750-1000Spacer, .800 x 1.10 x 1.322
54750-0151Spacer,.550 ID x.755 OD x 1.1
55754-0642V-Belt
56756-04129Pulley, Idler, 4.25” Dia.
57783-04013A Bracket, Stabilizer, Pulley
58783-04462Lift Bracket
59783-04690A Skirt, Deck
60783-05492Cover, Belt, RH
61783-05493Cover, Belt, LH
62783-04726Bracket, Idler, Stationary
63631-04070A Chute Ass’y, Side Discharge
64783-05030Chute Mounting Bracket
65732-04372Torsion Spring
66731-05559A Deflector Chute
67711-04565Hinge Pin
Illustrated
Parts List
To order
replacement parts,
call the Customer
Service Line at
1-800-800-7310
or visit
www.mtdproducts.com
IMPORTANT
For a proper working
machine, use Factory
Approved Parts.
V-belts are designed to
engage and disengage
safely. A substitute
(non OEM) V-belt can
be dangerous by not
disengaging completely.
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard
equipment.
15
Page 16
Illustrated
Kohler Twin Cylinder Engine
Parts List
To order
replacement parts,
call the Customer
Service Line at
1-800-800-7310
or visit
www.mtdproducts.com
For Choke
9
14
16
3
2
15
6
17
7
8
4
Ref.
No.
1710-0227AB Screw # 8-18 x 0.5
2710-0599TT Screw 1/4-20 x 0.5
3710-0654ATT Screw 3/8-16 x 1.00
4710-0726AB Screw 5/16-12 x 0.5
5710-1314AScrew, 5/16-18 x .750
6712-3005Flange Lock Nut, 3/8-16
7725-0157Cable Tie
8726-0205Hose Clamp
9736-0300Flat Washer, .406 x .875 x .059
Part No.Description
5
Ref.
No.
10751-0564BMuffler Deflector
11751-0644BLH Exhaust Pipe
12751-0645ARH Exhaust Pipe
13751-0805ADual Inlet Muffler
14751-10349Fuel Line Hose
15751-3141OIl Drain Extension Hose
16751-3140Oil Drain Valve
17783-0615DMuffler Bracket
12
Part No.Description
11
13
10
1
NOTE: Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard
equipment.
16
Page 17
17
Page 18
NOTES
Use this page to make notes and write down important information.
18
Page 19
NOTES
Use this page to make notes and write down important information.