MTD 780 User Manual
Illustrated Parts Manual
Printed In USA
Transmatic Lawn Tractor — Model Series 780
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
Form No. 769-07607
(November 07, 2011)
To The Owner
Thank You
Thank you for purchasing this lawn tractor. It was carefully
engineered to provide excellent performance when properly
operated and maintained.
All information in this manual is relative to the most recent
product information available at the time of printing.
Please be aware that this Illustrated Part’s Manual may cover a
range of product specifications for various models. Components
Table of Contents
Axle, Front ...............................................................10
Battery ...................................................................... 8
Head Lamps .......................................................... 4-7
Mower Deck, 42-inch .............................................16
Mower Deck, 46-inch .............................................18
Pedal Controls ........................................................14
Dash Panel ............................................................ 4-7
Drive System ...........................................................14
Electrical Schematic .............................................. 22
Engine Accessories ........................................... 20-21
Fender .....................................................................12
Frame ....................................................................... 8
Fuel Tank ............................................................... 4-7
listed and/or illustrated in this manual may not be applicable to
all models. We reserve the right to change product specifications,
designs and equipment without notice and without incurring
obligation.
Throughout this manual, all references to right (RH) and left (LH)
are observed from the operating position.
Hood ..................................................................... 4-7
Deck Lift Handle/Linkage ....................................... 8
Muer ............................................................... 20-21
PTO Lever ................................................................. 8
Seat ..........................................................................12
Steering Wheel .......................................................10
Switches, Interlock .................................................. 8
Throttle Control .................................................... 4-7
Transmission ...........................................................14
Wheels, Front ..........................................................10
Wheels, Rear ...........................................................14
Wiring Harness Schematic ................................... 22
Record Product Information
To ease in ordering replacement parts, please locate the model
plate on the equipment and record the information in the
provided area to the right. You can locate the model plate by
looking beneath the seat.
Model NuMber
Serial NuMber
Painted Parts
When ordering painted service parts, a four digit color suffix must be added to the part number (e.g. 783-XXXXX-0637).
Please refer to the table below for current color codes:
0637 Black
0709 Dark Green (Bolens, Yard-Man)
0662 Oyster Gray (MTD Gold)
0638 Red (Yard Machines, Huskee, Troy-Bilt, MTD)
0691 Black Jack (MTD Gold, MasterCut)
2
0674 Yellow (Yard-Man)
0650 Metallic Red (White Outdoor)
0629 Silver Flake (MTD Platinum)
04038 Day Orange (Daedong)
04033 Flint Mica (Troy-Bilt XP)
Notes
3
K Style Hood
2
17
3
1
5
7
8
13
49
36
37
29
51
22
44
52
53
21
30
33
34
14
24
23
20
28
9
46
31
45
32
6
40
43
31
6
19
25
26
18
16
A
4
21
27
14
A
35
15
50
10
12
48
46
47
32
11
42
35
41
47
38
4
39
48
45
4
K Style Hood
Ref.
No.
1 631- 04272 Grill Assembly, Troy-Bilt
2 731- 0640 4 K-Style Bumper
3 68 3- 0 4 441A Hood Assembly
4 710-044 84 Screw, 5/16-18 x .750
5 710-0895 Screw, 1/4-15 x .750
6 72 5 - 0157 Cable Tie
7 925- 0963 Lamp
8 731- 060 95 Left Lens
9 731-06096 Right Lens
10 738- 0 4 091A Shoulder Screw, 5/16-18 x .43 x .29
11 783- 05327B Left Support Pivot Bracket
12 783-05328A Right Support Pivot Bracket
13 710 -04 483 Screw, 1/4-20 x .500
14 710 - 05070 Screw, 1/4-20 x .500
15 710 - 0604A Screw, 5/16-18 x .625
16 712- 0 4063 Flangelock Nut, 5/16-18
17 710-05281 Screw, #12-16 x 1.25
18 783-07083 Gas Tank Support Bracket
19 910 - 0224 Screw, #10-16 x .500
20 731-05265 Choke Plug
21 710 -1652 Tap Screw, 1/4-20, 0.625
22 710 -3144 Hex Screw, 3/8-16 x 2.0
23 710-3025 Hex Screw, 5/16-18 x .625
24 931-08054 Dash, Upper
25 741-0587 Bearing, .628 ID x 1.36
26 783-06785A Bracket, Steering Support
27 7 8 3 -0 6 811 Dash, Lower
28 750-04465B Flange Spacer, .390 x .671 x 1.095
Part No. Description
Ref.
No.
29 746- 0 4367 Throttle/Choke Cable
30 783-06991 Speed Latch - No RMC
31 683-04448 Battery Assembly Rod
32 726 -0230 Cable Tie
33 747-05398 Speed Control Rod
34 783-06823 Speed Latch Tab
35 951-04304 1.36 Gallon Fuel Tank
36 92 5 -1745A Key
37 736-3006 Lock Washer, 1/4
38 936-3008 Flat Washer, .344 x .750 x .120
39 951-10589 5 Gallon Carbon Canister
40 951-10590 Vent Filter Canister
41 951-10610 Canister Adapter Bracket
42 751-10749-30 Fuel Hose, White
43 751-10750-28 Fuel Hose, Yellow
44 925-04659 3 Position Key Switch
45 951-1217 9A Fuel Cap, 2.25”
46 751-12118 Rollover Valve
47 735-04081 Rubber Grommet, 23 x 3.55
48 751-12 0 8 9 -28 Hose Vent, 3/16 EPA
49 710 - 0778 Hex Washer Screw, 1/4-20 x 1.50
50 712- 0 4065 Flangelock Nut, 3/8-16
51 731-07885A Shift Lever
52 731-07966 Index Control
53 732- 04877 Compr. Spring, .72 OD x .78
— 725-04567G Harness, LT-5, NRMC,Dual
Part No. Description
951-12426 Fuel Cap, 2.25” EPA
NOTE, Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard equipment.
5
5 Style Hood
9
13
36
44
49
14
20
19
35
17
7
1
8
38
46
47
5
2
3
1
48
31
6
21
39
37
29
41
22
42
43
21
30
25
23
33
A
28
34
26
16
24
18
4
27
14
15
40
A
10
12
45
32
11
6
5 Style Hood
Ref.
No.
1 710-04593 Screw, 5/16-18 x .375
2 710-0751 Hex Screw, 1/4-20 x .620
3 712- 0 4 0 64 Flangelock Nut, 1/4-20
4 710-044 84 Screw, 5/16-18 x .750
5 731-04949A Grill Lens
6 72 5 - 0157 Cable Tie
7 925- 0963 Lamp
8 783-05454 Hood Pivot Bracket
9 783-05683 Hood
10 738- 0 4 091A Shoulder Screw, 5/16-18 x .43 x .29
11 783- 05327B Left Support Pivot Bracket
12 783-05328A Right Support Pivot Bracket
13 710 -04 483 Screw, 1/4-20 x .500
14 710 - 05070 Screw, 1/4-20 x .500
15 710 - 0604A Screw, 5/16-18 x .625
16 712- 0 4063 Flangelock Nut, 5/16-18
17 783-05685 Grill
18 783-07083 Gas Tank Support Bracket
19 910 - 0224 Screw, #10-16 x .500
20 731- 05265 Choke Plug
21 710 -1652 Tap Screw, 1/4-20, 0.625
22 710 -3144 Hex Screw, 3/8-16 x 2.0
23 710-3025 Hex Screw, 5/16-18 x .625
24 741-0587 Bearing, .628 ID x 1.36
25 931- 08054 Dash, Upper
Part No. Description
931- 08542 Dash, Upper NRMC
Ref.
No.
26 783-06785A Bracket, Steering Support
27 7 8 3 -0 6 811 Dash, Lower
28 750-04465B Flange Spacer, .390 x .671 x 1.095
29 746- 0 4367 Throttle/Choke Cable
30 783-06991 Speed Latch - No RMC
31 683-04448 Battery Assembly Rod
32 726 -0230 Cable Tie
33 747-05398 Speed Control Rod
34 783-06823 Speed Latch Tab
35 951-04304 1.36 Gallon Fuel Tank
36 92 5 -1745A Key
37 736-3006 Lock Washer, 1/4
38 751-12089-28 Hose Vent, 3/16 EPA
39 710 - 0778 Hex Washer Screw, 1/4-20 x 1.50
40 712- 04 0 65 Flangelock Nut, 3/8-16
41 731-07885A Shift Lever
42 731- 07966 Index Control
43 732- 04877 Compr. Spring, .72 OD x .78
44 925-04659 3 Position Key Switch
45 951-1217 9A Fuel Cap, 2.25”
46 751-12118 Rollover Valve
47 735-04081 Rubber Grommet, 23 x 3.55
48 710- 0895 Screw, 1/4-15 x .750
49 731-05078C† Dash Collar
— 725-04567G Harness, LT-5, NRMC,Dual
Part No. Description
† If Equipped
NOTE, Tractor features vary by model. NOT all parts listed above and pictured on the previous page are standard equipment.
7
Frame and PTO Lift
53
18
51
4
10
4
45
50
5
46
21
47
29
25
17
19
13
B
22
16
A
31
34
A
57
8
12
B
6
3
5
27
26
30
C
2
6
9
3
1
11
8
24
33
23
28
12
34
15
6
39
23
23
7
20
56
28
52
49
48
55
54
4
44
11
8
24
36
35
A
31
24
38
23
31
43
39
37
B
42
40
5
5
43
41
14
C
32
46“ Deck Lift
24
40
8
Loading...