Cub cadet GT 2550 User Manual

Parts Manual

SERIES 2500

TRACTOR

Model Number

GT 2550

CUB CADET LLC P.O. BOX 361131 CLEVELAND, OHIO 44136-0019 [www.cubcadet.com ]

PRINTED IN U.S.A. FORM NO. 769-01479

(10/04)

NOTES

-3-

MODEL GT2550

TABLE OF CONTENTS

DESCRIPTION PAGE

Axle, Front ....................................................... 36

Battery ............................................................. 16

Brakes .............................................................. 4

Bulkhead .......................................................... 15

Controls

Engine ..........................................................

Pedal ............................................................

Transmission ................................................

Dash Panel ...................................................... 15

Drawbar ........................................................... 18

Drive Line ......................................................... 9

Electrical

Switches .......................................................

Wiring ...........................................................

Engine

Air Filter ........................................................

Blower Housing ............................................

Breather ........................................................

Carburetor ....................................................

Controls ........................................................

Crankcase ....................................................

Crankshaft ....................................................

Cylinder Head ...............................................

Electrical ........................................................

Exhaust..........................................................

Flywheel ........................................................

Fuel System ..................................................

Oil Pan ..........................................................

Starter ...........................................................

Valves ...........................................................

15

4
8

16

16

26
21
23
27
30
22
24
23
29
24
29
27
25
28
23

DESCRIPTION PAGE

Engine Mounting .............................................. 20

Fender ............................................................. 34

Frame .............................................................. 18

Fuel Tank ......................................................... 19

Grille ................................................................ 32

Hood ................................................................ 32

Hydraulic Filter ................................................. 14

Hydraulic Linkage ............................................ 14

Hydrostatic Pump ............................................ 12

Implement Lift Handle ...................................... 37

Implement Lift Hanger ..................................... 38

Muffler .............................................................. 20

PTO Clutch ...................................................... 19

Running Board ................................................. 34

Seat ................................................................. 31

Side Panels ..................................................... 32

Steering ........................................................... 6

Transmission, Hydro ........................................ 10

Wheels, Front & Rear ...................................... 39

50" Mower Deck ............................................... 40

NOTE: For painted parts, please refer to the
list of color codes below. Please add the appli­cable color code, wherever needed, to the
part number to order a replacement part.

For instance, if a part, numbered 700-xxxx, is
painted Cub Yellow, the part number to order
would be 700-xxxx-0716.

Cub Yellow: 0716

Cub Beige: 0499

Cub Blue: 0685

Powder Black: 0637

-4-

BRAKE AND CONTROL PEDALS

47

55

37

29

31

39

48

46

11

51

28

32

20

54

15

18

21

34

10

23

14

30

38

5

26

31

44

45

31

1

35

50

22

12

21

27

40

13

18

50

30

30

52

30

52

27

30

8

20

1

41

48

31

16

1

33

3

3

31

48

30

49

7

43

17

6

42

17

54

8

25

27

36

24

4

50

59

56

57

59

9

60

63

61

30

2

64

62

66

49

58

65

57

19

8

6

8

1

7

6

BRAKE AND CONTROL PEDALS

REF.

PART

NO.

NUMBER DESCRIPTION QTY.

1 603-0321A Shaft Assy, Brake 1
2 603-0412 Pedal Assy, Reverse 1
3 603-0697 Shaft Assy, Forward/Reverse 1
4 603-0419 Cam Assy, Control 1
5 603-0421A Plate Assy, Disengagement 1
6 703-2570A Pedal, Forward 1
7 703-2573A Pedal, Brake 1
8 703-2804 Plate, Bearing Mounting 2

9 703-2938 Bracket, Reverse Pivot 1
10 703-2941 Bracket, Cruise 1
11 703-2942 Plate, Rod Adjustment 1
12 703-2962 Lever, Cruise 1
13 703-2963 Lever, Brake Lock 1
14 703-2965 Actuator, Reverse Switch 1
15 710-0106 Screw, Hex Cap, 1/4-20 x 1.25 1
16 710-0599 Screw, Hex Wash Hd Tapp 1/4-20 x .5 1
17 710-0623 Screw, Hex Wash Hd Tapp 3/8-16x .75 2
18 710-0642 Screw, Hex Wash Hd Tapp 1/4-20x .75 6
19 710-0796 Screw, Truss Mach, #12 x 1.5 1
20 710-0216 Screw, Hex Cap, 3/8-16 x .75 GR5 2
21 710-3009 Screw, Phil Hd Pan, #10-24 x .75 2
22 711-0415 Pin, Clevis, 3/8 x 1.62 1
23 711-0736 Ferrule, Adjustment, 1/4-20 Thrd 1
24 711-1138 Stud, Actuator 1
25 711-3295 Pin, Clevis, .25 x 2.38 1
26 712-0271 Nut, Hex Sems, 1/4-20 1
27 712-0431 Nut, Hex Flange Lock, 3/8-16 3
28 712-3004A Nut, Hex Flange Lock, 5/16-18 1
29 712-3027 Nut, Hex Flange Lock, 1/4-20 1
30 714-0104 Pin, Internal Cotter, 5/16 Dia x 1.12 9
31 714-0145 Pin, Internal Cotter, 3/8 Dia x 1.62 6
32 715-0114 Pin, Spiral Spring, 1/4 x 1.5 1
33 731-3205 Pedal, Reverse 1
34 731-3206 Knob, Cruise 1

-5-

REF.

PART

NO.

NUMBER DESCRIPTION QTY.

35 731-3207 Knob, Brake Lock 1
36 732-0418 Spring, Extension, .38 OD x 2.1 1
37 732-0463A Spring, Extension 1
38 732-0756A Spring, Torsion 1
39 732-04006 Spring, Extension, .6 OD x 1.34 1
40 732-3099 Spring, Compression, .50 x 2.23 1
41 732-3117 Spring, Switch Actuator 1
42 735-3048 Pad, Forward Foot Control 1
43 735-3049 Pad, Brake Foot 1
44 736-0174 Washer, Wave, .625 x .885 x .015 1
45 736-0349 Washer, Flat, .635 x 1.0 x .020 1
46 736-0463 Washer, Flat, 1/4 x .63 x .051 1
47 738-0145 Shoulder Bolt, .50 OD x .840 1
48 741-3065B Bearing, Hex Flange Split 4
49 741-3073 Bearing, Flange, .375 x .58 x .25 2
50 741-3074 Bearing, Flange, .626 x .93 x .344 3
51 747-3392A Rod, Brake 1
52 747-3219 Rod, Parking Brake 1
54 747-3307 Rod, Cruise 1
55 748-3060 Latch, Cruise 1
56 761-0215 Disc, Brake 1
57 710-1206 Screw, Hex Wash Hd, Tapp,

58 712-0273 Nut, Hex Nylon Lock, 5/16-24 1
59 717-0678 Pad, Brake 2
60 717-0682 Plate, Puck 1
61 732-0925 Spring, Torsion 1
62 736-0371 Washer, Flat, .343 x .88 x .062 1
63 741-0343 Pin, Brake Actuating 2
64 761-0207A Yoke, Brake 1
65 761-0208 Bracket, Brake Anti Rotation 1
66 761-3074 Arm, Brake Actuator 1
67 747-3341A Rod, Rear Connecting 1
68 747-3383 Rod, Front Connecting 1

1/4-20 x 2.375

2

19

-6-

STEERING

16

7

4

14

5

5

23

10

22

13

26

27

21

24

10

12

17

25

9

20

2

3

18

6

11

1

24

11

15

8

8

15

-7-

STEERING

REF.

PART

NO.

NUMBER DESCRIPTION QTY.

1 603-0064 Arm Assy, Lower Steering 1
2 603-0250 Segment Assy, 18T Steering 1
3 603-0236B

737-3000
748-0108
748-3007A

4 731-2624 Wheel, Steering, Soft Grip 1
5 710-3008 Screw, Hex Cap, 5/16 - 18 x .75, GR5 2
6 710-1260A Screw, Hex Wash. Hd. Tapp

7 712-0237 Nut, Hex Center Lock, 5/16-18 1
8 712-0711 Nut, Hex Jam, 3/8-24 GR2 4

9 712-3012 Nut, Hex Slotted, 1/2-20 GR5 1
10 712-3004A Nut, Hex Flange Lock, 5/16-18 GR5 2
11 712-3054 Nut, Hex Lock, 3/8-24 GR5 4
12 714-3004 Pin, Cotter, 3/32 Dia x 1.25 1
13 717-3382 Pinion, Steering 1
14 722-3019 Gasket, Steering 1
15 723-0156 Joint, Ball, 3/8-24 4
16 731-2625 Cap, Steering Wheel 1
17 736-0272 Washer, Flat, .510 x 1 x .06 Thk 1
18 736-0351 Washer, Flat, .760 x 1.5 x .03 Thk 1
19 736-0242 Washer, Bell., .34 x .872 x .061 Thk 1
20 736-0921 Washer, Lock, 1/2 1
21 736-3013 Washer, Flat, .531 x 1 x .027 Thk 2
22 711-04360 Shaft, Steering 1
23 741-3025 Bearing, Flange 1
24 747-3171 Rod, Tie 2
25 714-0115 Pin, Cotter, 1/8 x 1.0 1
26 736-0355 Washer, Flat, .56 x 1.0 x .04 Ht 1
27 736-3132 Washer, Flat, 1.12 x .5 x .125 1

Housing Assy,

Fitting, Grease, 3/16 Drive Type
Bearing, Flange, .503 ID
Bearing, Bronze Flange, .75 ID

5/16 - 18 x .75

1
1
1
2

4

-8-

TRANSMISSION CONTROLS

7

3

REF.

NO.

1 710-0642 Screw, Hex Wsh Hd Tapp, 1/4-20 x .75 2
2 710-3170 Screw, Ball, 5/16-18 x.56 1
3 712-0271 Nut, Hex Sems, 1/4-20 1
4 712-3004A Nut, Hex Flange Lock, 1/4-20 1
5 714-0101 Pin, Internal Cotter 1
6 714-0104 Pin, Internal Cotter 1
7 727-3090 Cylinder, Damper 1
8 732-3118 Spring, Extension, 3/8 OD x 1.44 1

9 738-0560 Bolt, Shoulder, .374 Dia x 1.375 1
10 747-3304 Rod, Front Control 1
11 647-3003 Rod, Rear Hydro Control 1
12 748-3070A Plate, Cruise 1
13 750-0434 Spacer, Split Tubing, .375 ID x 1.04 1

13

1

9

5

PART
NUMBER DESCRIPTION QTY.

11

10

2

8

4

12

6

-9-

DRIVE LINE

11

7

8

19

5

15

31

12

22

29

10

16

9

28

18

20

REF.

PART

NO.

NUMBER DESCRIPTION QTY.

1 603-0707 Bracket, Torque 1
2 617-3002 Gear Assembly, Pinion 1
3 618-3243 Transmission, Hydrostatic 1
4 703-4093 Spring Plate, Hydro Dump 1
5 710-0465 Screw, Hex Cap, 1/2-20 x 4.5 GR5 4
6 710-0599 Scrw, Hx Wsh Hd Tapp, 1/4-20 x .5 1
7 710-0919 Scrw, Hx Wsh Hd Tapp, 10-16 x .44 1
8 710-1062 Screw, Hex Patch, 1/4-20 x 1.25 GR5 4

9 710-1888 Scrw, Hx Hd Tapp, 5/16-18 x 5.25 4
10 710-3008 Screw, Hex Cap, 5/16-18 x .75 GR5 4
11 710-3288 Screw, Hex Patch, 1/4-20 x 1.62 GR5 4
12 712-3009 Nut, Hex Cntr Lock, 3/8-16 4
13 712-3058 Nut, Hex Nylon Lock, 1/2-20 GR2 4
14 712-3059 Nut, Hex Top Lock Jam, 1/2-20 1
15 718-3143 Shaft, Drive, 30.875 Lg 1
16 719-3096 Adapter, Engine 1
17 721-0519 Seal, Gland 1

24

17

32

13

13

14

21

3

23

2

26

4

30

6

27

25

5

24

REF.

PART

NO.

NUMBER DESCRIPTION QTY.

18 727-3195 Dipstick, Transmission 1
19 731-3294 Holder, Dipstick 1
20 735-0277A Grommet, Rubber, .75 x 1.063 1
21 736-0253 Washer, Belleville 1
22 736-0275 Washer, Flat, .344 x .688 x .065 2
23 736-0619 Washer, Spring 1
24 736-3019 Washer, Flat, .531 x 1.062 x .134 4
25 747-3417 Rod, Hydro Dump Valve 1
26 748-3093 Adapter, Hydro Pump 1
27 750-3349 Spacer, Hydro, .323 x .443 3.51 2
28 750-3350 Spacer, Hydro, .323 x .600 x .74 2
29 KH-24-086-16 Screw, Hex Patch, M10-1.50x 90mm 2
30 714-0104 Internal Cotter Pin 1
31 731-3297 Fan, Pump 1
32 Transmission Assembly, Hydro —

See Pages 10-11 for Parts Info.

10

12

22

1

1

12

42

-10-

HYDRO TRANSMISSION

23

14

4

34

3

1

34

7

21

10

36

34

28

25

24

26

37

29

32

18

15

13

23

19

17

15

33

9

8

13

40

16

38

20

31

18

10

35

21

41

30

11

22

6

2

34

14

23

1

42

5

12

39

27

5

-11-

HYDRO TRANSMISSION

REF.

PART

NO.

NUMBER DESCRIPTION QTY.

618-04176 Transmission Assembly, Hydro —

1 618-04115 Hub Assembly, Wheel 2
2 619-3071A Housing, RH Transmission 1
3 619-3072 Housing, LH Transmission 1
4 710-0573 Screw, Hex Cap Lock,

5 710-1206 Screw, Hex Wash Hd. Tapp,

6 710-1633 Screw, Plug, M14 x 1.5 x .827 1
7 710-3144 Screw, Hex Cap Lock,

8 711-1052A Shaft, Cross, .50 x 3.005 2

9 711-1385A Shaft, Output, 9T 1
10 711-04233 Shaft, Axle 2
11 712-0273 Nut, Hex Nylon Lock, 5/16-24 1
12 710-3119 Screw, Hex Cap Lock,

13 716-04032 Ring, Retaining 4
14 716-0204 Ring, Retaining 2
15 717-0678 Pad, Brake 2
16 717-0682 Plate, Puck 1
17 717-1446 Gear, Miter, 10T 4
18 717-04102 Gear, Miter, 14T 2
19 717-1568A Gear, Differential Spur, 60T 1
20 717-3449 Gear, Bevel, 54T 1
21 719-0375A Housing, Differential w/Thru Holes 2
22 712-3020 Nut, Hex Insert Jam GR5, 3/8-16 4
23 721-0523 Seal, Oil, 1.0 x 2.047 x .2755 3
24 726-0324 Clamp, Hose 1
25 731-1480 Vent, Plastic 1
26 731-1481 Cap, Plastic Vent 1
27 732-0925 Spring, Torsion 1
28 735-0277A Grommet, Rubber, .75 x 1.063 1
29 735-0279 Grommet, Rubber, .362 x .56 1
30 736-0371 Washer, Flat, .343 x .88 x .062 1
31 736-0615 Washer, Thrust, 1.007 x 1.542 x .03 1
32 737-3092 Fitting, Tube 1
33 741-0343 Pin, Brake Actuating 2
34 741-3114 Bearing, Ball (6205-1) 6
35 750-3346 Spacer, Axle, 1.007 x 1.665 x .141 1
36 750-3358 Spacer, Axle, 1.007 x 1.665 x .989 1
37 751-0588-8 Tube, Transmission Breather 1
38 761-0207A Yoke, Brake 1
39 761-0208 Bracket, Brake Anti Rotation 1
40 761-0215 Disc, Brake 1
41 761-3074 Arm, Brake Actuater 1
42 736-0227 Washer, Flat, .39 x 1.5 x .134 2

759-3958
737-3120
737-3121

Does not include Ref Nos. 1 and 12

5/16-18 x 1.25 GR5

1/4-20 x 2.375

3/8-16 x 2.0 GR5

3/8-16 x .75 GR5

Sealant, Loctite Black, 5.3 oz. Tube
Drive System Fluid Plus - Quart
Drive System Fluid Plus - Gallon

1

14

2

4

2

1

5.5
AR

-12-

HYDROSTATIC PUMP

26

30

20

13

31

30

19

9

24

30

15

12

14

15

10

17

16

7

2

17

28

27

25

29

22

23

21

6

11

8

2

3

1

5

4

12

18

-13-

HYDROSTATIC PUMP

REF.

PART

NO.

NUMBER DESCRIPTION QTY.

1 HG-50158 Shaft, Pump (Splined) 1
2 HG-2003016 Ring, Retaining 2
3 HG-2003043 Bearing, Ball 1
4 HG-2003018 Spacer 1
5 HG-9008000-0128 Seal, Lip 1
6 HG-2003052 Ring, Retaining 1
7 HG-2003023 Bearing, Cradle 2
8 HG-9008000-0126 Seal, Lip 1

9 HG-2003005 Arm, Trunnion 1
10 HG-2000015 Guide, Slot 1
11 HG-2513036 Housing Kit 1
12 HG-2003044 Bearing Assembly, Thrust Ball 2
13 HG-51077 Center Section Kit 1
14 HG-2003034 Shaft, Motor 1
15 HG-2003017 Washer, Block Thrust 2
16 HG-2003087 Swash Plate 1
17 HG-70079 Block Assembly 2
18 HG-9004800-2506 Pin 2
19 HG-2003060 Gasket, Center Section 1
20 HG-2510027 Kit, Check Valve 1
21 HG-2510034 Kit, Orificed Check Valve 1
22 HG-2510011 Kit, Charge Relief Valve 1
23 HG-9007314-0808 Screw, Socket Hd 8
24 HG-2003014 Spring, Block 1
25 HG-9004101-1340 O-Ring 1
26 HG-2513027 Kit, Charge Pump 1
27 HG-J1041008 Gerotor Assy 1
28 HG-50095 Screw, Socket Hd 2
29 HG-2513011 Bypass Valve Kit 1
30 HG-9004201-3700 O-Ring 3
31 HG-9005110-5600 Plug w/O-Ring 2