Page 1
WM55Y22SA (2004) Page 1 of 6
Gear Case Assembly
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WM55Y22SA (2004) Page 2 of 6
Gear Case Assembly
Ref # Part Number Qty Description
1 183497 Case, Lower
2 183498 Case, Upper
3 183499 Gear, 27 Teeth
4 183500 Lever, Clutch
5 183501 Spring, Return
6 183502 Shaft, Input
7 183503 Dog, Movable
8 183504 Dog, Fixed
9 183505 Wire, Formed
10 183506 Bearing, Ball
11 183507 Fork, Shift
12 183508 Seal, Output Shaft
13 183509 Washer
14 183510 Seal, Case
15 183511 Bushing
16 187521 Shaft, Output
17 183513 Screw
18 183514 Seal, Input Shaft
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WM55Y22SA (2004) Page 3 of 6
Lawn Mower Housing & Handle Assembly
Page 4
WM55Y22SA (2004) Page 4 of 6
Lawn Mower Housing & Handle Assembly
Ref # Part Number Qty Description
1 166860X479 Upper Handle
2 146771 Control Bar
3 156581 Engine Zone Control Cable
5 179585 Rope Guide
7 131959 Handle Bolt
8 66426 Wire Tie
9 51793 Hairpin Cotter
10 136376 Handle Knob
12 151590X479 Lower Handle
18 170346X479 Handle Bracket Assembly (Left)
19 170345X479 Handle Bracket Assembly (Right)
22 189008 Rear Deflector
23 750097 Screw, Hex Washer Head #10-24 x 1/2
24 87584X004 Bracket, Deflector
25 151889 Discharge Guard
27 147286 Rod, Hinge
28 154132 Bracket, Housing
29 152124 Spring, Torsion
30 751592 Locknut, Hex
35 700325X007 Bracket, Wheel Adjuster
36 146630 Spacer
38 700331X004 Spring, Selector
39 87877 Knob, Selector
40 145935X004 Axle Arm Assembly
41 62335 Belleville Washer
42 142748 Shoulder Bolt
43 189172 Wheel & Tire Assembly
45 83923 Locknut, Hex 3/18-16
46 141846 Decal, Danger
48 149741 Screw, Thread Cutting 5/16-18 x 3/4
49 73800400 Locknut, Hex
51 182002 Debris Shield
52 150406 Screw, Hex Head, Threaded, Rolled 3/8-16 x 1-1/8
53 851084 Screw, Hex Head 3/8-24 x 1-3/8 (Grade 8)
54 850263 Washer, Lock, Helical
55 851074 Washer, Hardened
56 152202 Blade, 22"
57 184590 Adapter, Blade
58 176509 Deflector, Discharge
62 189225 Lawn Mower Housing (Includes Key Number 46)
63 184941 Pulley, Engine
64 187723 Hi-Pro Key
68 Engine, Briggs & Stratton, Model Number 123K02 (for
engine service and replacement parts, call Briggs & Stratton
at 1-800-233-3723)
69 153350X479 Support Bracket, Handle, RH
70 153282X479 Support Bracket, Handle, LH
71 132004 Locknut, Keps
72 77400 Hubcap
161058 Warning Decal (Not Shown)
172787 Operator's Manual, English
172789 Operator's Manual, Spanish
189224 Repair Parts Manual
71 33072 Grass Catcher Available accessory not included with lawn
mower
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WM55Y22SA (2004) Page 5 of 6
Wheel & Tire Assembly
Page 6
WM55Y22SA (2004) Page 6 of 6
Wheel & Tire Assembly
Ref # Part Number Qty Description
1 184588 Drive Control Assembly
2 88058 Bearing, Wheel Adjuster
3 751152 Nut, Hex
4 158755 Screw, Machine, Pan Head 1/4-20 x 2-3/16
5 146527 V-Belt
6 150495 Bolt, Hex Head 1/4-20 x 2
8 77400 Hubcap
9 145212 Locknut
11 189171 Wheel & Tire Assembly
12 12000058 E-Ring
13 137054 Pinion
14 180504 Dust Cover
16 67725 Washer
18 701037 Knob, Selector
26 143603 Screw, Tapping, Pan Head #10-24 x 2-3/4
28 154990 Drive Cover
31 132010 Locknut, Hex
32 137052 Pulley, Drive
35 152019 Kit, Wheel Adjuster, LH (Includes Knob and Bearing)
36 187211 Gear Case Assembly (See "Gear Case Assembly")
37 137090 Spring
38 73800400 Locknut
41 152018 Kit, Wheel Adjuster, RH (Includes Knob and Bearing)
55 86012 Drive Shaft Cover
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