Scag STT-25CH-LP User Manual
ILLUSTRATED
30
31
32
33
34
29
33
36
37
40
39
38
41
35
18
18
PARTS
IPL
MANUAL
Model STT-25CH-LP
Turf Tiger
THIS MANUAL CONTAINS THE ILLUSTRATED PARTS LIST FOR MODELS:
STT52V-25CH-LP with a serial number of F5300001 to F5399999
STT61V-25CH-LP with a serial number of F5500001 to F5599999
© 2011
Scag Power Equipment
Division of Metalcraft of Mayville, Inc.
Part No. 06214
Printed 3/2011
Printed in USA
R
Table of Contents
Table of Contents
52V CUTTER DECK ...........................................................................................................................................2
61V CUTTER DECK ...........................................................................................................................................4
CUTTER DECK CONTROLS .............................................................................................................................6
SHEET METAL COMPONENTS ........................................................................................................................8
STT ROLL-OVER PROTECTION SYSTEM .....................................................................................................10
STT SUSPENSION SEAT ................................................................................................................................12
DECK DRIVE COMPONENTS .........................................................................................................................14
ENGINE AND ATTACHING PARTS - KOHLER LP .........................................................................................16
BRAKE AND STEERING COMPONENTS ......................................................................................................18
HYDRAULIC SYSTEM - KOHLER LP .............................................................................................................20
LP SYSTEM - KOHLER ...................................................................................................................................22
BDP-16A HYDRAULIC PUMP ASSEMBLY ..................................................................................................... 24
ELECTRICAL SYSTEM - KOHLER LP ............................................................................................................26
REPLACEMENT DECALS AND INFORMATION PLATES .............................................................................28
ELECTRICAL SCHEMATIC - KOHLER LP .....................................................................................................30
I
R
52V CUTTER DECK
44 61 63
69
12
65
64
52
58
54
17
59
24
14
56
28
56
33
3
A
A
B
B
4
14 29 20
53
2852
24
58
24
52
73
66
32
13
68
55
55
29
58
2
3
23
3
11
50
13
46
60
49
67
24
35
48
9
16
19
15
27
26
12
82
51 23
23
36
37
44
39
43
42
38
45
41
34
62
22
40
37
18
10
1
5
7
68
STT 2008 CD
14
29
12
30
28
31
25
31
21
47
51
12
23
70
71
22
13
72
74
28
29
13
26
57
75
76
77
78
79
80
81
83
84
85
86
Section 8
2
R
Section 8
52V CUTTER DECK
Ref.
Part No. Description
No.
1
461859
2
04003-40
3
04019-04
4
481625-01
5
481632
6
04003-26
7
422478
8
04017-27
9
04043-06
10
04021-05
11
461845
12
04001-11
04001-12
13
04021-22
14
04020-09
15
451240
16
04001-41
17
04003-12
18
04001-108
19
04063-08
20
04063-01
21
04043-04
22
04001-176
23
04019-03
24
04001-172
25
48100-15
26
04030-03
27
04040-15
28
04041-07
29
04021-09
30
04001-62
31
04001-54
32
04001-20
33
04001-136
34
461663
35
43589
36
481024
37
481022
38
43644
39
43312
40
43296
41
481025
42
43297
43
481035
44
48114-04
45
48677
Cutter Deck Velocity Plus
Bolt, Carriage 7/16-14 x 1-1/4”
Nut, Hex Serr. Flng 3/8-16
Wing nut, 3/8-16
Anti-Scalp Wheel
Bolt, Carriage 3/8-16 x 4”
Anti-Scalp Wheel Bracket
Bolt, Hex Serr. Flng 3/8-16 x 1”
Flatwasher, 5/8” Hardened
Locknut, 3/8-16 Center Lock
Discharge Chute
Bolt, Hex Head 5/16-18 x 1-3/4” - Front
Bolt, Hex Head 5/16-18 x 1-1/2” - Rear
Nut, Hex Elastic Stop 5/16-18 Grd 8
Nut, 5/8-11 UNC
Push Arm Shaft
Bolt, HH 5/8-11 x 9-1/2”
Bolt, Carriage 5/16-18 x 3/4”
Bolt, HH 5/16-18 x 4-1/2”
Key, 1/4 x 1/4 x 2”
Key, 1/4 x 1/4 x 1-1/4”
Flatwasher,3/8” (.39 x .938 x .105”) HD
Bolt, HH 5/16-18 x 1-3/4”
Nut, Hex Serr. Flng 5/16-18
Bolt, HH 1/4-20 x 1” Grd 8
Bushing, .376” I.D. Oilite
Lockwasher, 5/16”
Flatwasher, 5/16” (.375 x .875 x .083”)
Flatwasher, 3/8” (.391 x .938 x .105”)
Nut, Hex Elastic Stop 3/8-16
Bolt, HH 3/8-16 x 3-1/4”
Bolt, HH 3/8-16 x 3”
Bolt, HH 3/8-16 x 1-1/2”
Bolt, HH 3/8-16 x 1-1/2” Grd 8
Spindle Assembly
Spindle Shaft
Seal, Top
Bearing Assembly
Spindle Housing
Spacer, Outside
Spacer, Inside
Seal, Bottom
Spindle Bushing, Bottom
Nut, Special 1-1/16-18
Grease Fitting
Relief Fitting, Tapered Spindle
Ref.
Part No. Description
No.
46
483378
47
482295
48
482878
49
482486
50
482281
51
45944
52
48926
53
48141
54
461842
55
48224
56
483215
57
461929
58
482744
59
424798
60
422412
61
461516
62
43590
63
04020-16
64
48763
65
04001-79
66
483704
67
482747
68
04110-03
69
04021-13
70
424208
72
43503
73
424840
74
04003-23
75
04040-11
76
04021-11
77
483167
78
04003-12
79
04040-04
80
04021-04
81
483176
82
48038
83
04021-10
84
43763
85
424799
86
04001-154
Spring, Discharge Chute
Wheel, Anti-Scalp
Cutter Blade, 18”
Gearbox Assm, Deck Drive
Belt, Cutter Deck Drive
Roller Shaft
Tapered Hub, 1-1/8” Bore
Tapered Hub, 1” Bore
Idler Arm, Cutter Deck
Bearings, Ball
Pulley, Idler
Lever Assembly, Deck Level (Incl. 77)
Pulley, 5.75” O.D. (52”)
Mounting Plate, RH Gearbox
Belt, Cover
Pusharm (includes items 44, 63 & 64)
Spacer, Spindle Bottom
Nut, Hex Head 5/8-18 UNF
Rod End, 5/8” Male RH Thrd
Bolt, Hex Head 5/8-11 x 4-1/2”
Spring, Cutter Deck
Pulley, 6.95” O.D.
U-Nut, 3/8-16
Nut, Hex Elastic Stop 5/8-11
Discharge Baffle 52V
Pivot, Idler - Short
Baffle, Custom Cut 52V
Bolt, Carriage 3/8-16 x 1”
Flatwasher, 7/16” (.500 x 1.25 x .083”)
Nut, Elastic Stop 7/16-14
Bolt, Deck Adjust
Bolt, Carraige 5/16-18 x 3/4”
Flatwasher, 5/16”
Nut, Center Lock 5/16-18
Wear Pad
Wheel, Anti-Scalp
Nut, Elastic Stop 5/16-18
Spacer, Gearbox Mount
Mounting Plate, LH Gearbox
Bolt, HH 5/16-18 x 4-3/4”
3
R
61V Cutter Deck
44 61 63
69
12
65
64
52
58
54
17
59
24
14
56
28
56
33
3
A
A
B
B
4
14 29 20
53
2852
24
58
24
52
73
66
32
13
68
55
55
29
58
2
3
23
3
11
50
13
46
60
49
67
24
35
48
9
16
19
15
27
26
12
82
51 23
23
36
37
44
39
43
42
38
45
41
34
62
22
40
37
18
10
1
5
7
68
STT-EFI 2008 CD
14
29
12
30
28
31
25
31
21
47
51
12
23
71
22
13
72
74
28
29
13
26
57
75
76
77
78
79
80
81
83
84
85
70
Section 8
4
R
Section 8
61V Cutter Deck
Ref.
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
Part No. Description
461863
04003-40
04019-04
481625-01
481632
04003-26
422478
04017-27
04043-06
04021-05
461846
04001-12
04021-22
04020-09
451240
04001-41
04003-12
04001-108
04063-08
04063-01
04043-04
04001-176
04019-03
04001-172
48100-15
04030-03
04040-15
04041-07
04021-09
04001-62
04001-54
04001-20
04001-136
461663
43589
481024
481022
43644
43312
43296
481025
43297
481035
48114-04
48677
Cutter Deck Velocity Plus
Bolt, Carriage 7/16-14 x 1-1/4”
Nut, Hex Serr. Flng. 3/8-16
Wing Nut, 3/8-16
Anti-Scalp Wheel
Bolt, Carriage 3/8-16 x 4”
Anti-Scalp Wheel Bracket
Bolt, Hex Serr. Flng. 3/8-16 x 1”
Flatwasher, 5/8” Hardened
Locknut, 3/8-16 Center Lock
Discharge Chute
Bolt, Hex Hd. 5/16-18 x 1-1/2” - Rear
Nut, Hex Elastic Stop 5/16-18 Grd. 8
Nut, 5/8-11 UNC
Pusharm Shaft
Bolt, Hex Hd. 5/8-11 x 9-1/2”
Bolt, Carriage 5/16-18 x 3/4”
Bolt, Hex Hd. 5/16-18 x 4-1/2”
Key, 1/4 x 1/4 x 2”
Key, 1/4 x 1/4 x 1-1/4”
Flatwasher,3/8 (.39 x .938 x .105”) HD
Bolt, Hex Hd. 5/16-18 x 1-3/4”
Nut, Hex Serr. Flng. 5/16-18
Bolt, Hex Hd. 1/4-20 x 1” Grd. 8
Bushing, .376” I.D. Oilite
Lockwasher, 5/16”
Flatwasher, 5/16” (.375 x .875 x .083”)
Flatwasher, 3/8” (.391 x .938 x .105”)
Nut, Hex Elastic Stop 3/8-16
Bolt, Hex Hd. 3/8-16 x 3-1/4”
Bolt, Hex Hd. 3/8-16 x 3”
Bolt, Hex Hd. 3/8-16 x 1-1/2”
Bolt, Hex Hd. 3/8-16 x 1-1/2” Grd. 8
Spindle Assembly
Spindle Shaft
Seal, Top
Bearing Assembly
Spindle Housing
Spacer, Outside
Spacer, Inside
Seal, Bottom
Spindle Bushing, Bottom
Nut, Special 1-1/16-18
Grease Fitting
Relief Fitting, Tapered Spindle
Ref.
No.
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
Part No. Description
483378
482295
482879
482486
481558
45944
48926
48141
461842
48224
483215
461929
482745
424798
424325
461516
43590
04020-16
48763
04001-79
483704
482746
04110-03
04021-13
04001-154
424209
43503
424841
04003-23
04040-11
04021-11
483167
04003-12
04040-04
04021-04
483176
48038
04021-10
43763
424799
Spring, Discharge Chute
Wheel, Anti-Scalp
Cutter Blade, 21”
Gearbox Assembly, Deck Drive
Belt, Cutter Deck Drive
Roller Shaft
Tapered Hub, 1-1/8” Bore
Tapered Hub, 1” Bore
Idler Arm, Cutter Deck
Bearings, Ball
Pulley, Idler
Lever Assembly, Deck Level (Incl. 77)
Pulley, 6.35” O.D. (61”)
Mounting Plate, RH Gearbox
Belt, Cover
Pusharm (Incl. 44, 63 & 64)
Spacer, Spindle Bottom
Nut, Hex Hd. 5/8-18 UNF
Rod End, 5/8” Male RH Thread
Bolt, Hex Hd. 5/8-11 x 4-1/2”
Spring, Cutter Deck
Pulley, 6.75 O.D.
U-Nut, 3/8-16
Nut, Hex Elastic Stop 5/8-11
Bolt, Hex Hd. 5/16-18 x 4-3/4”
Discharge Baffle 61V
Pivot, Idler - Short
Baffle, Custom Cut 61V
Bolt, Carriage 3/8-16 x 1”
Flatwasher, 7/16 (.500 x 1.25 x .083”)
Nut, Elastic Stop 7/16-14
Bolt, Deck Adjust
Bolt, Carriage 5/16-18 x 3/4”
Flatwasher, 5/16”
Nut, Center Lock 5/16-18
Wear Pad
Wheel, Anti-Scalp
Nut, Elastic Stop 5/16-18
Spacer, Gearbox Mount
Mounting Plate, LH Gearbox
5
R
CUTTER DECK CONTROLS
STT-28CAT 2008CDC
6
4
21
19
14
32
35
36
34
33
19
14
11
13
4
3
2
5
44
1
42
41
38
14
39
40
37
43
45
7
8
9
12
18
17
16
15
21
14
19
20
22
27
14
19
28
14
19
25
26
23
14
19
CUTTER DECK
19
28
30
24
25
29
24
31
25
26
14
24
10
Section 8
6
R
Section 8
CUTTER DECK CONTROLS
Ref.
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
Part No. Description
481764
04020-28
481766
04050-10
45905
43487
482429
04009-02
48100-14
481428
462102
424857
04014-03
04019-04
423509
04003-04
422381
423463
04001-20
04019 -03
481598
48114-04
43526
04020-09
04040-09
04061-07
45904
48540
04004-48
461929
43527
04021-05
04050-08
04041-14
481547
04067-09
04021-09
424504
04021-07
04030-07
04105-01
481765
04001-74
04020-27
43391
Link, Deck Lift
Nut, Jam 1/2-20 LH
Rod End, Female - 1/2-20 LH
Ring, Retaining 1/2” External “E”
Bellcrank Weldment, RH Rear
Pin, Decklift
Slide Weldment, Height Adjustment
Bolt, Shoulder 1/2 x 3/4”
Bushing, .502 ID.
Grip, Deck Latch
Deck Latch (Includes items 9 & 10)
Lockplate, Decklift
Screw, Cap 5/16-18 x 3” FHHS
Nut, Hex Serrated Flange 3/8-16
Guide, Long
Bolt, Carriage 5/16-18 x 1”
Guide, Short
Bracket, Cutting Height Adjustment
Bolt, Hex Head 3/8-16 x 1-1/2”
Nut, Hex Serrated Flange 5/16-18
Spring, Helper (61” & 72” Cutter Decks Only)
Grease Fitting
Swivel Joint, LH
Nut, Hex 5/8-11
Flatwasher, 5/8” (.656 x 1.312 x .095)
Cotter Pin, 3/16 x 1”
Bellcrank Weldment, LH Rear
Chain
Stud, 5/8-11 x 26.0”
Lever Assembly, Deck Level
Swivel Joint, RH
Locknut, 3/8-16 Center Lock
Ring, Retaining 1” External “E”
Flatwasher, 1” (1.062 x 1.50 x .048)
Lanyard, Deck Height Pin
Ring Pin, 1/2 x 3.06”
Nut, 3/8-16 Elastic Stop
Foot Pedal, Height Adjustment
Nut, Hex Elastic Stop 1/2-13
Lockwasher, 5/8”
Capscrew, 5/8-11 x 1-1/2”
Rod End, Female - 1/2-20 RH
Bolt, Hex Head 1/2-13 x 3”
Nut, Jam 1/2-20 RH
Spacer, Decklift Pedal
7
R
STT-25CH-LP 2011 SMC
48
50
26
30
25
12
15
19
9
1
23
24
31
32
33
34
29
33
36
37
40
39
38
41
42
43
51
35
44
45
15
27
22
4
20
28
15
14
13
12
11
10
16
17
20
5
8
7
18
18
4
A
A
6
49
47
46
3
8
52
B
B
55
53
53
54
54
54
54
SHEET METAL COMPONENTS
Section 8
8
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