Snapper YT User Manual
Parts Manual
Lawn Tractors & Mower Decks
16HP Tractors
Mfg. No. Description
1694368 YT1644, 16HP Hydro
18HP Tractors
Mfg. No. Description
1694369 YT1850, 18HP Hydro
Mower Decks
Mfg. No. Description
1694371 44" Mower Deck
1694372 50" Mower Deck
YT Series
02/2003
Rev.
TP 400-3821-00-CQ-N
Table Of Content
s
TRACTOR / MOWER DECK COMPONENTS PAGES
Frame Group .........................................................................................................................
Steering Group - Manual Steering .........................................................................................
Engine & Electric Clutch Group - 16HP Briggs & Stratton, Vanguard ...................................
Transmission Group ..............................................................................................................
Transmission SERVICE PARTS - Tuff Torq K-66L ...............................................................
Lift Group - Manual Lift ..........................................................................................................
Controls Group ......................................................................................................................
Cruise Control Group ............................................................................................................
Electrical Group .....................................................................................................................
Hood, Grill & Dash Group ......................................................................................................
Seat & Seat Deck Group .......................................................................................................
Wheels & Tires Group ...........................................................................................................
Decals Group - Brand & Model ..............................................................................................
Decals Group - Safety & Common ........................................................................................
44" & 50" Mower Deck - Clutch & Support ............................................................................
44" & 50" Mower Decks - Housing, Arbors & Blades .............................................................
44" Mower Deck - Height Adjustment & Roller Bar ...............................................................
2
6
8
10
14
20
22
26
28
32
34
36
38
40
42
44
48
50" Mower Deck - Height Adjustment & Roller Bar ...............................................................
Torque Specification Chart ..................................................................... Inside Back Cover
52
Frame Group
NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.
1
Torque to
150 ft. lbs.
(202 Nm)
34
33
985881
4
6
5
2
3
7
8
9
10
32
29
11
31
27
30
37
21
36
35
26
29
Torque to
150 ft. lbs.
(202 Nm)
28
43
21
12
13
16
23
25
11
Torque to
22-40 ft. lbs.
(30-54 Nm)
43
20
24
1718
21
17
22
43
11
15
16
19
Service Kit
1686985
42
1411
Torque to
55-60 ft. lbs.
(74-81 Nm)
38
39
40
21
41
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
2
TP 400-3821-00-CQ-N
Frame Group
PART NO. DESCRIPTIONREF NO. QTY.
1 1721748 1 TOWER & SUPPORT ASSEMBLY
2 1923683 4 CAPSCREW, Hex Washer Head Taptite, 3/8-16 x 3/4
3 1960541 4 CAPSCREW, Hex Washer Head Taptite, 5/16-18 x 3/4
4 1723528 1 SUPPORT, Seat Deck
5 1928352 2 NUT, Hex Flange 3/8-16 Whiz Lock, Large
6 1930644 2 NUT, Hex Flange Two-Way Lock, 1/2-13
7 1722602 1 BACKPLATE,
8 1923114 2 CAPSCREW, Hex Head 1/2-13 x 1, Black
9 1921210 2 CAPSCREW, Hex Head 3/8-16 x 1, Black
10 1721572 1 FRAME ASSEMBLY, Front & Rear
11 1930645 7 NUT, Hex Flange Two-Way Lock, 3/8-16
12 1922755 1 WASHER, 3/8, Black
13 1960103 2 WASHER, 3/8, Black
14 1722541 1 LINK, Drag
15 1919262 1 NUT, Hex Jam 1/2-20
16 1702779 1 JOINT, Ball
17 1708236 1 SPACER, 3/8 x 1/2 x 5/8
18 1931350 2 CARRIAGE BOLT, 3/8-16 x 1
19 1722626 1 ROD, Tie
20 1611705 2 SPACER, 25/64 x 5/8 x 5/16, Powder Metal
21 1721682 6 BUSHING, 31/32 x 1-1/4 x 3/4, Powder Metal
22 1930650 2 NUT, Hex Flange Two-Way Lock, 7/16-14
23 1722200 1 AXLE ASSEMBLY w/LH Spindle, (Includes Ref. Nos, 21, 35, 36, 37 & 43)
24 1931352 1 CARRIAGE BOLT, 3/8-16 x 1-1/2
25 1721752 1 SPACER, 11/16 x 21/32 x 2 3/32
26 1927531 2 CAPSCREW, Hex Head, 7/16-14 x 2 G8
27 1721918 1 HOOK, "J"
28 960645 1 CAPSCREW, Hex Head, 5/8-11 x 3-1/2
29 1960035 2 WASHER, 5/8
30 1933260 4 CAPSCREW, Hex Flange Whiz Lock, 3/8-16 x 3/4
31 1721805 1 BUMPER, Black
31 1723502 1 BUMPER, Chrome
32 1960086 4 SCREW, Truss Head Torque Drive, 5/16-18 x 7/8
33 960646 1 NUT, Hex Flange Two-Way Lock, 5/8-11
34 1722212 1 PLATE
35 1919394 1 WASHER, 1
36 932577 1 RETIANING RING
37 1722199 1 SPINDLE, RH
38 923485 1 CAPSCREW, 3/8-16 x 7/8, GR8
39 1663151 1 LOCKWASHER, 3/8
Footnotes
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
3
TP 400-3821-00-CQ-N
Frame Group
NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.
1
Torque to
150 ft. lbs.
(202 Nm)
34
33
985881
4
6
5
2
3
7
8
9
10
32
29
11
31
27
30
37
21
36
35
26
29
Torque to
150 ft. lbs.
(202 Nm)
28
43
21
12
13
16
23
25
11
Torque to
22-40 ft. lbs.
(30-54 Nm)
43
20
24
1718
21
17
22
43
11
15
16
19
Service Kit
1686985
42
1411
Torque to
55-60 ft. lbs.
(74-81 Nm)
38
39
40
21
41
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
4
TP 400-3821-00-CQ-N
Frame Group
PART NO. DESCRIPTIONREF NO. QTY.
40 1725112 1 HUB & ARM ASSEMBLY
41 930671 1 KEY, WOodruff
42 1724264 1 SPINDLE, LH
43 1704314 3 FITTING, Lube
Footnotes
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
5
TP 400-3821-00-CQ-N
Steering Group - Manual Steering
NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.
986283
2
Steering cap snaps
1
5
6
15
21
8
9
over steering wheel.
3
7
4
20
Torque to
36-44 ft. lbs.
or 48-60 Nm
19
Bearing mounts below
frame. Slide pinion on
steering shaft into gear
before tightening nuts.
18
Use washers
5
as required.
17
15
16
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
10
6
5
11
12
14
13
Torque to
36-44 ft. lbs.
or 48-60 Nm
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
6
TP 400-3821-00-CQ-N
Steering Group - Manual Steering
PART NO. DESCRIPTIONREF NO. QTY.
1 1722318 1 STEERING WHEEL, Straight, Shaft
2 1725024 1 CAP, Steering Wheel, Plain
3 1960540 1 PIN, Spring, 5/16 x 2-1/2
4 1722749 1 COVER, Rubber, Upper Steering Shaft
5 1960114 5 WASHER, 3/4
6 176440 2 BUSHING, 15/32 x 7/8 x 7/8, Nylon
7 928372 2 NUT, Hex KEPS 1/4-20
8 1721736 1 PLATE, Mounting Steering
9 1960518 2 NUT, Push
10 1931317 2 CARRIAGE BOLT, 1/4-20 x 3/4
11 1722385 1 GEAR & SHAFT ASSEMBLY, Steering
12 1960032 1 CAPSCREW, Hex Head, 3/8-16 x 1-1/4, Black
13 1930645 1 NUT, Hex Flange Two-Way Lock, 3/8-16
14 1664847 2 CAPSCREW, Hex Washer Head Taptite, 5/16-18 x 3/4
15 1721626 1 SHAFT & PINION ASSEMBLY, Steering Manual
16 1611710 1 RING, Clipring Extension
17 1722459 1 BEARING, 3/4 x 1-11/16 x 13/16, 3" Long Housing
18 1722461 1 SPACER, 3/4 x 1-1/16 x 3/8, Powder Metal
19 1931211 2 NUT, Hex Flange Whiz Lock, 3/8-16, Small
20 1933260 2 CAPSCREW, Hex Whiz Lock Flange, 3/8-16 x 3/4, Black
21 1919314 1 PIN, Cotter, 1-1/4, Black
Footnotes
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
7
TP 400-3821-00-CQ-N
Engine & Electric Clutch Group - 16HP Briggs & Stratton, Vanguard
NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.
Engine manufactures
gasket & hardware.
Torque to 18 ft. lbs.
(25 Nm)
30
29
985902
3
1
2
31
32
4
6
5
B&S Vandguard Twin:
Tie cables to Left
Hand side of shield.
7
8
7
9
26
25
24
27
22
22
11
23
23
21
Note:
Orentation
of All Keys
28
26
10
20
19
18
17
Torque to
45-50 ft. lbs.
(61-68 Nm)
Engine Ground
Wire
Torque to
19-23 ft. lbs.
(26-31 Nm)
12
14
15
16
Position pulley
chamfer side up.
Tie clutch wire
to spring away
from pulley.
13
10
11
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
8
TP 400-3821-00-CQ-N
Engine & Electric Clutch Group - 16HP Briggs & Stratton, Vanguard
PART NO. DESCRIPTIONREF NO. QTY.
1 1723165 1 HOSE, Oil Drain, 10-1/2" Long, 3/8-18 Fittings
2 * 1 ENGINE, 16HP Briggs & Stratton Vanguard Twin, Model 303777, Type
1114
3 1719847 1 SEAL, Circle
4 1722388 1 BULKHEAD
5 1925003 2 CAPSCREW, Hex Washer Head Taptite, 1/2-20 x 1/2, Black
6 1721950 1 CONTROL, Throttle Double 39" Long w/Knobs
7 1701011 2 TIE, Wire, 7-5/16" Long
8 960112 2 CLAMP, Hose Type E
9 1718678 1 HOSE, Fuel, 59" Long
10 1722392 2 SHIELD, Side
11 1929000 8 CAPSCREW, Hex Washer Head Taptite, 1/4-20 x 3/8
12 1722288 1 PULLEY & HUB ASSEMBLY
13 932747 1 TIE, Self Locking, 3-5/8 Long
14 1708264 1 WASHER, Hex, 7/16, Black
15 1918199 1 LOCKWASHER, 7/16
16 1960648 1 CAPSCREW, Hex Head, 7/16-20 x 3-3/4
17 1717664 1 CLUTCH, Electric
18 1720463 1 KEY, HI PRO, 1/4 x 2 1/2
19 930598 4 CAPSCREW, Hex Washer Head Taptite, 3/8-16 x 1-1/2
20 920427 1 LOCKWASHER, External Tooth, 3/8
21 1722414 1 SHIELD, Muffler Bottom
22 1960368 8 NUT, Speed, 1/4-20, Lug
23 1960295 4 CAPSCREW, Hex Flange Whiz Lock, 1/4-20 x 5/8
24 1935255 2 NUT, Speed, 5/16-18, Lug, Black
25 1722389 1 DUCT, Muffler Top
26 934683 2 CLIP, Wire 1/8
27 1722390 1 DUCT, Muffler Extension
28 1924856 2 CAPSCREW, Hex Washer Head Taptite, 5/16-18 x 1/2, Black
29 1722625 1 MUFFLER, Briggs & Stratton, Vanguard Twin
30 * 1 GASKET, Briggs & Stratton, Vanguard Twin
31 1917356 4 LOCKWASHER, 5/16
32 960660 4 CAPSCREW, Hex Flange Whiz Lock, 5/16-18 x 7/8
Footnotes
* See your local Briggs & Stratton distributor for parts and service.
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
9
TP 400-3821-00-CQ-N
Transmission Group
NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.
4
3
2
1
45
44
Torque nut to
29 - 34 ft. lbs.
(39 - 46 Nm)
43
42
41
985888
48
46
7
37
15
19
20
18
Left
17
12
16
13
9
8
14
15
21
22
10
10
11
Route through Right
Hand slot of back plate.
6
5
47
40
34
39
38
37
10
32
33
15
13
36
Spring to be
compressed to
2-1/2 inches with
brake locked.
13
35
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
17
30
29
31
Right
Right Hand
Side Only.
15
28
27
Right Hand
Side
23
24
25
26
Left Hand
Side
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
10
TP 400-3821-00-CQ-N
Transmission Group
PART NO. DESCRIPTIONREF NO. QTY.
1 1920397 2 NUT, Hex Lock ESNA Light, 1/4-20
2 1960654 2 SCREW, Truss Head, 1/4-20 x 2
3 1722174 1 PAD, Footrest, LH, Differential Lock
4 1722173 1 PAD, Footrest, RH
5 1960636 1 NUT, Hex KEPS, 5/16-18
6 1704351 15 FASTENER, 11/16" Long, Stem Plastic
7 1928352 2 NUT, Hex Flange Whiz Lock, 3/8-16, Large
8 1960637 6 NUT, Hex KEPS, 3/8-16
9 1931350 6 CARRIAGE BOLT, 3/8-16 x 1
10 1919438 6 NUT, Hex Lock ESNA Light, 5/16-18
11 1721728 2 SUPPORT
12 1676148 2 BUSHING, 5/8 x 3/4 x 13/32, Powder Metal
13 1924940 4 WASHER, 3/8
14 1922130 1 CAPSCREW, Hex Head, 3/8-16 x 2-1/4
15 1722460 7 PIN, Quick
16 1722151 1 ROD, Differential Lock, 15-3/16 Long
17 1925125 2 WASHER, 7/16
18 1721360 1 ROD & TUBE ASSEMBLY, Differential Lock Pedal
19 1716289 1 KNOB
20 1669105 1 SPACER, 25/64 x 5/8 x 1-1/2, Hardened
21 1723126 1 KNOB, 3 Sided Soft
22 1721622 1 ROD, Free Wheel, 18-3/16 Long
23 1921210 1 CAPSCREW, Hex Head, 3/8-16 x 1, Black
24 1722903 1 PIVOT ASSEMBLY, Differential Lock
25 1919326 2 WASHER, 5/16, Black
26 1923141 2 CAPSCREW, Hex Head, 5/16-18 x 2 3/4, Black
27 1960590 2 CAPSCREW, Hex Head, 5/16-18 x 3, Black
28 1722152 1 ROD, Differential Latch, 2 Bends, 6-3/16 Long
29 1921333 1 CAPSCREW, Hex Head, 5/16-18 x 1
30 1722383 1 ARM, Differential Lo c k
31 1721952 1 TRANSMISSION ASSEMBLY, K66 Transmission
32 1918447 1 PIN, Cotter, 3/4, Black
33 1721424 1 ROD, Brake, 17-27/64 Lo ng
34 1722684 1 SPRING, Compression
35 8191045 1 SPRING, Compression
36 1919439 1 NUT, Hex Lock, ESNA Light 3/8-16
37 1960141 2 WASHER, 5/16
38 1960027 1 WASHER, 1/2
39 1722648 1 BEARING, 1/2 x 9/16 x 3/4, Nylon
40 1721988 1 ARM & WELD PINS ASSEMBLY, Control K66
Footnotes
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
11
TP 400-3821-00-CQ-N
Transmission Group
NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.
4
3
2
1
45
44
Torque nut to
29 - 34 ft. lbs.
(39 - 46 Nm)
43
42
41
985888
48
46
7
37
15
19
20
18
Left
17
12
16
13
9
8
14
15
21
22
10
10
11
Route through Right
Hand slot of back plate.
6
5
47
40
34
39
38
37
10
32
33
15
13
36
Spring to be
compressed to
2-1/2 inches with
brake locked.
13
35
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
17
30
29
31
Right
Right Hand
Side Only.
15
28
27
Right Hand
Side
23
24
25
26
Left Hand
Side
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
12
TP 400-3821-00-CQ-N
Transmission Group
PART NO. DESCRIPTIONREF NO. QTY.
41 1721392 1 V-BELT
42 1722194 1 PULLEY & HUB ASSEMBLY, Transmission
43 1719968 1 NUT, Hex Flange, M10-1.5, Nylon Insert
44 1719233 1 FAN, 5 Blades, 3 Holes
45 1933958 3 CAPSCREW, Hex Washer Head Taptite, 1/4-20 x 1-1/8
46 1931335 1 CARRIAGE BOLT, 5/16-18 x 1
47 1721593 1 STRAP, 4-1/4 Long
48 1921719 1 CAPSCREW, Hex Head, 5/16-18 x 2-1/2
Footnotes
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
13
TP 400-3821-00-CQ-N
Transmission SERVICE PARTS - Tuff Torq K-66L
NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.
91
1721952
1
104
103
102
93
92
90
6
89
7484
81
100
101
4
6
26
99
94
13
88
87
83
82
5
80
79
98
97
6
96
12
95
86
85
26
25
2
3
55
7
8
9
10
11
12
24
23
22
16
15
14
10
20
13
27
17
18
19
21
107
6
63
67
31
33
34
35
32
5
42
40
41
44
53
51
52
106
62
36
37
38
41
59
105
39
31
29
45
50
76
77
78
51
52
75
20
73
72
28
30
47
55
53
54
74
60
71
70
46
48
49
56
57
58
61
64
65
68
69
66
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
14
TP 400-3821-00-CQ-N
Transmission SERVICE PARTS - Tuff Torq K-66L
PART NO. DESCRIPTIONREF NO. QTY.
1 1718076 1 RING E15
2 1724314 1 FAN
3 1708651 1 SEAL
4 1708650 1 RING 35
5 1708672 4 RING 15
6 1718083 1 BEARING 6202UC3
7 1724699 1 SHAFT, PUMP
8 1722223 1 PIN 3 x 13.8
9 1724696 1 CAP, M20B
10 1720789 2 O-RING, P18
11 1724692 1 HOUSING, UPPER
12 1724693 2 BUSHING, 25.4
13 1718264 2 SEAL S25.4 x 42 x 8
14 1724695 1 BOLT, 8 x 20
15 1724746 1 FITTING
16 1724745 1 SEAL, 8
17 1724740 1 VALVE, VENT 15
18 1724742 1 TANK, RESERVOIR
19 1724743 1 PIPE, 8
20 1707890 3 SCREW, TAPPING
21 1724744 1 BRACKET, TANK
22 1724708 1 ARM, CONTROL
23 1724709 1 SPRING, TORSION
24 1721181 1 COLLAR, CONTROL
25 1721966 1 WASHER 17 x 30 x 1
26 1707912 2 RING
27 1724697 1 CASE, CENTER
28 1718070 1 PIN 3 x 9.8
29 1724698 3 BOLT, 10 x 65
30 1718084 1 WASHER 12 x 24 x 1
31 1718079 2 CYLINDER BLOCK
32 1708675 1 BEARING, THRUST
33 1724700 1 HOUSING
34 1724702 1 BEARING, 6302UC3
35 1724701 1 SHAFT, MOTOR
36 1724723 1 DISC, BRAKE
37 1724726 1 ACTUATOR, BRAKE
38 1724724 1 SHOE, BRAKE
39 1724725 1 SHIM SET
40 1724714 1 SHAFT, FINAL PINION
Footnotes
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
15
TP 400-3821-00-CQ-N
Transmission SERVICE PARTS - Tuff Torq K-66L
NOTE: Unless noted otherwise,
use the standard hardware torque
specification chart.
91
1721952
1
104
103
102
93
92
90
6
89
7484
81
100
101
4
6
26
99
94
13
88
87
83
82
5
80
79
98
97
6
96
12
95
86
85
26
25
2
3
55
7
8
9
10
11
12
24
23
22
16
15
14
10
20
13
27
17
18
19
21
107
6
63
67
31
33
34
35
32
5
42
40
41
44
53
51
52
106
62
36
37
38
41
59
105
39
31
29
45
50
76
77
78
51
52
75
20
73
72
28
30
47
55
53
54
74
60
71
70
46
48
49
56
57
58
61
64
65
68
69
66
The above parts group applies to the following Mfg. Nos.:
1694368 - YT1644
1694369 - YT1850
© Copyright Simplicity Manufacturing, Inc. All Rights Reserved.
2003
16
TP 400-3821-00-CQ-N