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Ace by MTD 138-643A033 (72770) (1988) Lawn Tractor

Model: 138-643A033 (72770) (1988)

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Electrical, With Round Headlights

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1
Circuit Breaker MTD-753-0685

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2
Reverse Safety Switch MTD-725-0759

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3
Electric Wire w/Boot (Positive) MTD-725-0927

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4
Battery 12V MTD-753-0607

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5
Ground Wire 9.0" Lg. (Negative) MTD-725-0975


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7
Ignition Switch MTD-925-0267B

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8
Safety Switch (P.T.O.) MTD-725-0803B

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9
Safety Switch (Clutch) MTD-725-0577

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10
Ground Wire 7.25" Lg. (Engine) MTD-725-0976

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11
Wire Harness MTD-725-1308

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12
Solenoid MTD-925-0771

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13
Outer Seat Spring Switch MTD-925-1303

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14

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15
Light Switch MTD-925-0634

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16
Ground Wire MTD-725-0916A

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17
Head Light MTD-925-0222

Electrical, With Square Headlights

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1
Circuit Breaker MTD-753-0685

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2
Spring-Switch-Reverse MTD-725-0759

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3
Ground Wire 9.0" Lg. MTD-725-0975


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5
Ignition Switch MTD-925-0267B

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6

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8
Safety Switch MTD-725-0577

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9
Ground Wire MTD-725-0916A

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12
Miniature Lamp 12V Socket Type MTD-925-0963

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13
Headlight Socket MTD-925-1058A

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14
Ground Wire 7.25" Lg. MTD-725-0976

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15
Light Switch MTD-925-0634

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16
Safety Switch MTD-725-0803B

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17
Battery 12V MTD-753-0607

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18
Electric Wire w/Boot MTD-725-0927

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19
Solenoid MTD-925-0771

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20
Wire Harness MTD-725-1308

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21
Outer Seat Spring Switch MTD-925-1303

Parts01

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1
Steering Wheel Cap MTD-931-0220

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2
Hex L-Nut 5/16-24 Thd. MTD-712-0237

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3
Belleville Wash. .345" I.D. MTD-736-0242

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4
Steering Wheel (3 Spoke) MTD-731-0805

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xx
Steering Wheel (4 Spoke) MTD-731-0806

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5
Steering Bellow MTD-731-0559B

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xx
Steering Bellow-9" (Style 1) MTD-731-0654

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6
Steering Column Ass'y. MTD-16512

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7
FLANGE BEARING MTD-741-0356A

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8
Hex L-Nut 1/4-20 Thd. MTD-712-0324

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9
Fl-Wash. .438" I.D. x 1.37" O.D. MTD-936-0319

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10
Shoulder Bolt .437" Dia. x .35 Lg. 5/16-18 Thd. MTD-938-0141

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11
Hex Bolt 3/8-24 x 1" Lg. MTD-710-1039

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12
Bell-Wash. .400" I.D. x 1.13" O.D. MTD-936-0219

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13
Spacer.380" I.D. x .625" O.D. x .227 MTD-950-0535

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14
L-Wash. 3/8" I.D. MTD-736-0169

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15
Hex Wash. Hd. Self-Tap Scr. MTD-710-0726

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16
Steering Drag Link MTD-711-0788

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17
Front Pivot Brkt. MTD-14619

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18
Shoulder Bolt .498" Dia. x 2.04 Lg. 3/8-16 Thd. MTD-738-0527

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19
Hex Nut 3/8-16 Thd. MTD-712-0798

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20
L-Wash. 3/8" I.D. MTD-736-0169

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21
Hex Cent. L-Nut 5/16-24 Thd. MTD-712-0237

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22
Steering Arm Front Axle MTD-983-0055-0637

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23
Hex Bolt 5/16-24 x 2.00" Lg.(Grade 5) MTD-710-0772

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24
FLANGE BEARING MTD-941-0225

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25
Pivot Bar Ass'y. MTD-753-0642-0637

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26
Front Axle Ass'y. L.H (Used With 13 Inch Tire) MTD-983-0041A

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xx
Front Axle Ass'y. L.H MTD-16479P

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27
Hex Nut 3/8-24 Thd. MTD-712-0241

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28
L-Wash. 3/8" I.D. MTD-736-0169

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29
Ball Joint, 3/8-24 MTD-923-3018

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30

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31
Hex Jam Nut 3/8-24 Thd. MTD-712-0711

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32
Front Axle Ass'y. R.H.. (Used With 13 Inch Tire) MTD-683-0040

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xx
Front Axle Ass'y.-R.H. MTD-14650A

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33
Wheel Ass'y. Comp. MTD-NA

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xx
Wheel Ass'y. Comp. MTD-634-0056B-0911

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xx
Wheel Ass'y. Comp. MTD-634-0056B-0911

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xx
Wheel Ass'y. Comp. (13 x 5.00) MTD-734-1229

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34
Front Wheel Rim Only MTD-NA

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xx
Front Wheel Rim Only MTD-753-0838-0662

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xx
Rim Only (14.5 x 6.00) MTD-734-0864

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xx
Rim Only (13 x 5.00) MTD-734-1227

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35
Flange Bearing .632 ID MTD-741-0487C

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36
Fl-Wash. .635 I.D. x 1.59" O.D. MTD-736-0285

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37

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xx
Front Wheel Hub Cap (Chrome) (Optional) MTD-734-0541

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38
Cotter Pin 1/8" Dia. x 1.25" MTD-714-0470

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39
Fl-Wash. .640" I.D. x 1.24" O.D. MTD-736-0187

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40
Push Cap 5/8" Dia. Rod MTD-726-0214

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42
Hex Jam Nut 3/8-24 Thd. MTD-712-0711

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43
Hex L-Bolt 5/16-18 x .62" MTD-710-0538

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44
Lock Wash. 5/16" I.D. MTD-936-0119

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45
Fl-Wash. .33" I.D. x 1.25" O.D. MTD-736-0343

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46

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47
Hex Nut 3/8-24 Thd. MTD-712-0241

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48
L-Wash. 3/8" I.D. MTD-736-0169

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49
HEX NUT 5/16-18 MTD-712-3010

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50
Lock Wash. 5/16" I.D. MTD-936-0119

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51
Steering Gear Segment MTD-717-0622C

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52
FLANGE BEARING MTD-941-0225

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53
Fl-Wash. (Hardened) MTD-736-0187

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54
STEERING SHAFT-LOWER MTD-738-0522A

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55
Hex Bolt 1/4-20 x 1.25" Lg. (Special) MTD-710-0106

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57
Oval Hd. Cr.-Sunk Scr. #10 x 518" Lg. MTD-710-0837

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58
SPRING WASHER .317 X .625 X .020 MTD-936-0271

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59
Fl-Wash. (Hardened) MTD-736-0187

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60
Ball Joint, 3/8-24 MTD-923-3018

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61
Ext. L-Wash. 5/16" I.D. MTD-736-0607

Parts02

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1
Engine MTD-NA

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2
Hex Bolt 1/4-20 x .62" Lg. MTD-710-0258

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3
Electric Ground Wire MTD-725-0122

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4
Hex Nut 5/16-24 Thd. MTD-912-3057

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5
Lock Wash. 5/16" I.D. MTD-936-0119

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6
Engine Mounting Plate MTD-14791

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7
Fl-Wash. .320" I.D. x 1.25" MTD-736-0343

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8
Engine Mounting Grommet MTD-722-0153

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9

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10
Hx Wash Hd. Scr. 3/8-16 x 1.25" (B&S) MTD-710-0502A

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xx
Hex Wash. Hd. TT-Tap Scr. 5/16-18 x 718" Lg. (Tec.) MTD-710-0650

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11
Lower Frame Ass'y. MTD-15930

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12
Hex Bolt 5/16-24 x 1.25" Lg. MTD-710-0672

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13
Hex Nut 1/4-20 Thd. MTD-912-0287

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14
L-Wash. 1/4" I.D. MTD-936-0329

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15
Hex Wash. Hd. AB-Tap Scr. 5/16" x .75" Lg. MTD-710-0781

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16
Belt Guard Brkt. Ass'y. MTD-15898

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17
Bell-Wash. .345" I.D. x .88" MTD-736-0242

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18
HEX NUT 5/16-18 MTD-712-3010

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19
Hex Bolt 5/16-18 x 5.25" Lg. MTD-710-0833

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xx
Hex Bolt 5/16-18 x 4.0" 30" (799) & 38" (805) De cks MTD-710-0190

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20
Sq. Key 1/4" x 1/4" x 2.00" MTD-914-0114

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21
Engine Pulley-30" R.D. (799) Deck MTD-756-0423

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xx
Engine Pulley-34" (800),38" (801) and 40" (804) Decks MTD-756-0428

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xx
Engine Pulley (805) Deck MTD-753-0635

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22
Fl-Wash. 7/16" I.D. x 1.25" MTD-736-0322

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23
L-Wash. 7/16" I.D. MTD-736-0171

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24
Hex Bolt 7/16-20 x 1.50" Lg. MTD-710-0757

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25
Variable Speed Belt MTD-954-0280A

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26
Hex Bolt 5/16-18 x .75" Lg. MTD-710-0118

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27
Bearing Shaft Bracket Ass'y. MTD-16553

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28
Flanged Brg. 5/8" I.D. MTD-741-0591

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29
Hex Nut 3/8-24 Thd. MTD-712-0241

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30
Idler Bracket MTD-15891C-0637

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31
L-Wash. 3/8" I.D. MTD-736-0169

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32
Hex Nut 3/8-24 Thd. MTD-712-0241

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33
Transaxle Support Brkt. MTD-15945E-0637

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34
Ext. Spring .94" O.D. x 6.7 MTD-732-0459C

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35
Inter. Cotter Pin MTD-714-0149B

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37
Cotter Pin 3/32" Dia. x .75" MTD-714-0507

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38
Grip-Black MTD-720-0143

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39
Hex Nut 1/4-28 Thd. MTD-712-0138

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40
SCREW 1/4-20 X1.00 GR5 MTD-710-0597

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41
Switch Actuator MTD-732-0582

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42
Safety Switch MTD-725-0577

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43
Hex Wash. Hd. S-Tap Scr. 1/4-20 x .50" Lg. MTD-710-0599

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44
Clutch/Brake Pedal Ass'y. MTD-16235

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45

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47
Brake Rod 20.9 Lg. MTD-747-0519

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48

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49
Brake Lever Bracket MTD-15889

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50
Hill Holder Brake Handle MTD-15888

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51
Shift Lever Ass'y. MTD-16430

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52
Hex Bolt 1/4-28 x 1.75" Lg. MTD-710-0559

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53
Ext. Spring .38n O.D. x 2.5" MTD-932-0264

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54
Ext. Spring .59n O.D. x 7 08" MTD-932-0413

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55
Hex Bolt 5/16-18 x 2.75 MTD-710-0176

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56
Wheel Ass'y. Comp. MTD-NA

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xx
Wheel Ass'y. Comp. (18 x 9.50) MTD-734-0817

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xx
Wheel Ass'y. Comp. (18 x 8.50) MTD-734-0601

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xx
Wheel Ass'y. Comp. (18 x 6.50) (30", 34", 38" Decks) MTD-734-0592

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xx
Wheel Ass'y. Comp. (18 x 6.50) (40" Deck) MTD-734-1132

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xx
Rear Wheel Compl. MTD-634-0139

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xx
Wheel Ass'y. Comp. (18 x 5.5) MTD-734-1190

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57
Wheel Rim Only MTD-NA

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xx
RIM ASSEMBLY (8.0 x 7.0 x .750) MTD-634-04369

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xx
RIM ASSEMBLY (8.0 x 7.0 x .750) MTD-634-04369

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xx
Rim Assembly (30", 34", 38" Decks) MTD-634-0138

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xx
Rim Only (18 x 6.50) (40" Deck) MTD-734-1133

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xx
Rim Assembly MTD-634-0138

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xx
Rim Only (18 x 5.5) MTD-734-1191

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58
TUBELESS VALVE (Service Only) MTD-934-0255

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59
Hex Bolt 5/16-24 x .75' Lg. MTD-710-0627

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60
Transaxle Complete MTD-717-1050

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61
Brake Return Spring Anchor MTD-932-0722A

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62
Belt Keeper, .25 DIA X 3.0 MTD-911-1000

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63
FLAT WASHER MTD-736-0275

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64
Hex Bolt 1/4-28 x 1.25" Lg. MTD-710-0428

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65
Ext. Spring MTD-732-0568

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66
Ext. Spring .62" O.D. x 6.12" MTD-932-0384

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67
Variable Speed Torque Brkt. Ass'y. MTD-16554

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xx
Variable Speed Torque Brkt. Ass'y. (30 Deck Only) MTD-6352

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68
Flanged Bearing MTD-741-0419

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69
Cotter Pin 3/32" Dia. MTD-714-0507

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70
Shoulder Spacer .27 Lg. MTD-748-0234

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71
Speed Control Link (30 Deck Only) MTD-747-0512

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xx
Speed Control Link MTD-747-0530A

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72
Truss Bearing .56 Dia. x 1.25" MTD-941-0405

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74
Fl-ldler Pulley 3.25" x 1.0" MTD-756-0643A

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75
1/2" "V"-Pulley 8.0 O.D. x.501" I.D. MTD-756-0374

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76
L-Wash. 1/2n I.D. MTD-736-0921


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78
Hex Bolt 3/8-24 x 1.75" Lg. MTD-710-0539

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79
Variable Speed Belt MTD-954-0281

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80
Snap Ring .56" Dia. MTD-916-0114

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81
Fl-Wash. MTD-736-0355

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82
Variable Speed Pulley Ass'y. 5" O.D. MTD-917-0800A

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83
Flange Wash. (Tec. Eng. Only) MTD-736-0392

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84
Variable Speed Brkt. Ass'y. MTD-16354

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85
Comp. Spring-Clip MTD-732-0525

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86
Transaxle Support Brkt.-R.H. MTD-14770

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xx
Transaxle Support Brkt.-L.H. (Not Shown) MTD-4769

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87
Fl-Wash. .34 I.D. x 1.12 O.D. MTD-736-0231

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88
Solenoid MTD-925-0771

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89
Shift Lever Bracket MTD-16429

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90
Teflon Washer 565" I.D. MTD-736-0414

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91
Circuit Breaker MTD-753-0685

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92
Hex Bolt 5/16-18 x 1.50"Lg. MTD-710-0959

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94
Shld. Bolt 3/8-24 x 3.12" Lg. MTD-938-0755

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95
Ext. Spring .99" O.D. x 11.0" MTD-932-0307A

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97
Bell-Wash. 38" I.D. x .88" MTD-736-0105

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98
Shaft 56" Dia. x 3.875" Lg. MTD-938-0569

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99
Bell-Wash. .39" I.D. x 1.12" MTD-736-0331

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100
Fl-Wash. MTD-936-0256

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101
Cotter Pin 3/32" Dia. x 1.0" MTD-714-0111

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102
Screw, 5/16-18 x .625 MTD-710-0604A

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104
Fl-Wash. .32" I.D. x 1.25" MTD-736-0362

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105
Belt Guard MTD-16067

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106
Truss Mach. Scr. 5/16-18 x .75" Lg. MTD-710-0323

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107
Pedal Bracket MTD-15885

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108
Cotter Pin 3/32" Dia. x 75 MTD-714-0507

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109
Hex Sems Bolt 5/16-18 x .75" 4. MTD-910-0198

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110
Hex Bolt 5/16-18 x 1.0" Lg. (Grade 5) MTD-710-0376

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111
Hex Bolt 1/4-28 x 50" Lg. MTD-910-0195

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112
Bell-Wash. .265" I.D. x .75" MTD-736-027A

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113
Shift Lever Link Ass'y. MTD-16437

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114
Muffler MTD-NA

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xx
8 H.P. B&S Muffler MTD-751-0157

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xx

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xx
11 & 12 H.P. B&S Muffler MTD-751-0450

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xx

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115
Fl-Wash. .385" I.D. x .62 MTD-736-0140

Parts03

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1
Truss Mach. Scr. 1/4-20 x .75" Lg. MTD-710-0924

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2
Speed Selector Plate 4-Speed MTD-16237

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xx
Speed Selector Plate 5-Speed MTD-16195

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xx
Speed Selector Plate 6-Speed MTD-16236

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xx
Speed Selector Plate 7-Speed MTD-16194

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3
Shift Knob MTD-720-0218

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4
Speed Selector Lever Ass'y. MTD-16192A

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5
Flat Washer .53" I.D. x .93" MTD-736-0192

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6

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7
Shoulder Bolt MTD-938-0155

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8
Speed Control Rod Ass'y. MTD-16355

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9
Cotter Pin 3/32" Dia. x .75" MTD-714-0507

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10
FLAT WASHER.469 ID x .88 OD MTD-936-0226

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11
Lock Wash. 5/16" I.D. MTD-936-0119

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12
HEX NUT 5/16-18 MTD-712-3010

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13
Cotter Pin 3/32" Dia. x .75" MTD-714-0507

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14
Spring .38" O.D. x 3.18" Lg. MTD-932-0303

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15
Clamping Plate MTD-16196

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17
Fl-Wash. .385" I.D. x .62" MTD-736-0140

Parts04

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1
Ext. Spring .99" O.D. x 11.0" MTD-932-0307A

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2
Flange Bearing .632 ID MTD-741-0487C

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3
Fl-Wash. .344" I.D. x 1.125" MTD-736-0231

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4
Screw, 5/16-18 x .625 MTD-710-0604A

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5
Adj. Link Lift MTD-14802A-0637

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6
Stabilizer Rod MTD-711-0738

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xx
Stabilizer Rod 36" (805) Deck Only MTD-711-0790A

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7
Stabilizer Shaft Ass'y. MTD-16234

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8
Hex Tap Scr. 5/16-18 x 1" MTD-710-0602

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9
Cotter Pin 1/8" Dia. x 11/4" MTD-714-0470

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10
Fl-Wash. .635" I.D. x 1.12" MTD-736-0156

...
11
Fl-Wash. .531" I.D. x .940" MTD-736-0160

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12
Cotter Pin 3/32" Dia. MTD-714-0111

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13
Lift Shaft Ass'y. MTD-17154

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14
Hex Jam Nut 5/16-18 Thd. MTD-712-3007

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15
Connecting Rod MTD-09735

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16
Fl-Wash. MTD-936-0117

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17
Inter. Cotter Pin 1/2" Dia. MTD-714-0101

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20
Flange Brg. .630" I.D. MTD-748-0176

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21
Deck Lift-Down Stop MTD-732-0412

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24
Pivot Link Ass'y. MTD-09721

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25
Shld. Bolt .437" Dia. x .180" Lg. (5/16-18) MTD-738-0140

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26
Fl-Wash. .344" I.D. x..62" MTD-736-0264

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27
Lock Wash. 5/16" I.D. MTD-936-0119

...
28
HEX NUT 5/16-18 MTD-712-3010

...
29
Index Brkt. MTD-16462

...
30
Spacer .523" I.D. x .640" O.D. x 1.95" Lg. MTD-711-0425

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31
Ext. Spring 13.25" Lg. MTD-732-0530

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32
EXTENSION SPRING MTD-732-0573

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33
Lift Handle Ass'y. MTD-16465

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34
Grip (Lift Handle) MTD-720-0157

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35
Intern. Cotter Pin 3/8" Dia. MTD-714-0145

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36
Hex Bolt 5/16-18 x .75" MTD-710-0118

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40

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41
Hex AB-Tap Scr. #10 x .50" MTD-710-0351

...
42
Safety Switch MTD-725-0803B

...
43

Single Speed Transaxle Right Hand

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...
1
#4 Hi-Pro Key 3/32 x 5/8" Dia. MTD-914-0129

...
2
Snap Ring .625" Shaft MTD-916-0115

...
3
Hex Wash. TT-Tap Scr. 1/4-20 x 1.75 Lg. MTD-710-1026

...
4
Hex Bolt 1/4-20 x 1.25" Lg. MTD-710-0809

...
5
Upper Housing MTD-717-0764

...
6
Hex Fl-Bolt 1/4-20 x .75" Lg. MTD-710-0642

...
7
Hex Nut 1/4-20 Thd. MTD-912-0287

...
8
Input Shaft MTD-717-0634A

...
9
Square Seal 5/8" I.D. MTD-721-0178

...
10
THRUST WASHER MTD-936-0335

...
11
Pinion Input 14T MTD-717-O633

...
12
Retaining Ring 7/16" Ext. MTD-716-0108

...
13
Drive Shaft-R.H. MTD-917-0758

...
14
Flange Brg. 5/8" I.D. x 3/4" Lg. MTD-941-0336

...
15
Fl-Wash. MTD-NA

...
xx
FLAT WASHER MTD-936-0349

...
xx
FLAT WASHER MTD-936-0336

...
xx
Fl-Wash. 5/8" I.D. x 1.0" O.D. x .040 Thk. MTD-736-0337

...
16
Bevel Gear 42T MTD-717-0757

...
17
Clutch Collar MTD-917-0667

...
18
Miter Gear 15T MTD-717-1020

...
19
Snap Ring MTD-753-0527

...
20
Snap Ring MTD-753-0527

...
21
Pan Head Scr. 1/4-20 x .50" Lg. w/Patch MTD-710-0862A

...
22
Axle R.H. MTD-717-1012

...
23
SLEEVE BEARING .75X1.00X1.00 MTD-741-05060

...
24
Oil Seal 3/4" I.D. MTD-721-0179

...
25
Flange Bearing 3/4" I.D. x 15/16" Lg. MTD-941-0339

...
26
Fl-Wash. .760" I.D. x 1.49" O.D. MTD-736-0188

...
27
Snap Ring MTD-753-0527

...
28
Differential Housing Ass'y. MTD-753-0546

...
29
Comes with Ref. 28 MTD-NA

...
30
Miter Gear-H.D. MTD-917-1019

...
31
Hex Ins. L-Nut 1/2-20 Thd. MTD-712-0200A

...
33
Fl-Wash. .75" I.D. x 1.5" O.D. MTD-736-0351

...
34
Lower Housing MTD-717-0761

...
35
Spacer .53" O.D. x 3/8" Lg. MTD-750-0555

...
36
L-Wash. 1/4" I.D. MTD-936-0329

...
37
Hex Bolt 1/4-20 x 1.50" Lg. (Grade 5) MTD-910-0886


...
39
Fl-Wash. .34" I.D. x .875" O.D. MTD-736-0371

...
40
Actuating Arm-R.H. MTD-717-0700

...
41
Brake Yoke MTD-717-0679

...
42
PUCK PLATE MTD-917-0682

...
43
BRAKE PUCK MTD-917-0678

...
44
Axle L.H. MTD-717-1011

...
45
Brake Disc MTD-717-0677

...
46
Flange Bearing 5/8" I.D. x 15/16" Lg. MTD-941-0337

...
47
KEY 3/16 x 5/8 H MTD-914-0161

...
48
Shift Fork Ass'y. MTD-917-0754

...
49
DETENT BALL .250 MTD-741-0862

...
50
DETENT SHAFT SPRING MTD-932-05125

...
51
#9 Hi-Pro Key 3/16" x 3/4" Dia. HT MTD-914-0169

...
52
NEEDLE BEARING MTD-941-0335

...
53
Screw, Hex MTD-710-0788

...
54
FLAT WASHER MTD-936-0336

...
54A
Fl-Wash. 5/8" I.D. x .040 MTD-736-0337

...
xx
FLAT WASHER MTD-936-0349

...
55
Actuating Pin 5/16" Dia. MTD-741-0343

...
56
Hex Bolt 1/4-20 x 1.50" Lg. (Grade 5) MTD-910-0886

...
57
Differential Gear 72T Ass'y. w/ Bearing MTD-717-1059

...
58
Sq. Hd. Bolt 5/16-24 Thd. MTD-717-0796

...
59
COTTER PIN-3/32 MTD-914-0507

...
xx
Grease, Benalene 8 oz tube (10 oz.) MTD-737-0300A