21" Rear Bagging Rear Drive Self Propelled Rotary Mower

Models WRRB4SP21F, ORRBSP21F

Exploded View Diagram Description

The diagram presents an exploded view of the MTD 21-inch rear bagging, rear-drive, self-propelled rotary mower, illustrating the arrangement and assembly of its various components. It details the engine (components 57-68, 111), the main deck structure (components 1-5, 18, 20, 21, 26, 36, 41, 46, 52, 56, 84, 93, 95, 102, 103, 105, 113), the handle and control mechanisms (components 6, 8, 9, 10, 17, 32, 33, 34, 35, 50, 54, 57, 58, 59, 61, 76, 77, 78, 79, 80, 85, 86, 87, 88, 89, 90, 91, 92, 96, 99, 100, 101, 104, 106, 108, 109, 110, 111, 112, 114), and the grass catcher system (components 22, 25, 39, 42, 43, 44, 45, 107). Key components like the blade (part 4), drive shaft (part 26), belts (part 84), and various adjustment mechanisms are also depicted with corresponding part numbers.

Parts List

Index	Part No.	Description
1	012641	Deck-Red
2	029298	Deck Green
3	024174	Bracket idler mount
4	030338	Blade 21" offset
5	041848	Wheel 8" x 1.75 front
6	051250	Throttle control w/cable
7	051649	Control ground drive w/cable
8	051540	Cable engine/blade control*
9	071449	Handle lower
10	071100	Handle upper
11	090589	Back plate front adjuster
12	090613	Setting lever - front adjuster
13	090977	Wheel lever - front adjuster
14	090746	Setting lever - rear adjuster
15	090761	Back plate rear adjuster
16	090910	Wheel lever - rear LH
	090894	Wheel lever rear RH
17	097659	Bail engine/blade control*
18	105825	Baffle front
19	106005	Blade washer
20	097162	Handle bracket - R.H.
21	097170	Handle bracket - L.H.
22	109546	Catcher hook
23	107128	Drive support mtg. brkt.
24	109496	Backing strip
25	108324	Latch rear bagger
26	108357	Drive shaft
27	107193	Idler arm
28	109082	Stepped sleeve
29	127191	Height Adjuster Assembly rear LH
30	126926	Baffle Assembly
31	128918	Height Adjuster Assembly rear RH
32	111526	Actuator engine control
33	110379	Cable tie
34	110510	Plastic tip - rear adjuster
35	112540	Plastic tip - front adjuster
36	112037	Dust cover rear wheel
37	112144	Belt cover
38	111633	Vinyl trailing shield*
39	111724	Knob catcher latch
40	126466	Blade adapter
41	128140	Wheel rear, w/gear
42	133371	Torsion spring catcher latch
43	143115	Decal - Danger*
44	002451	Decal door caution*
45	001206	Decal blade warning*
46	144899	Decal - starting instructions
47	715607	Washer 3/8 Belleville
48	150011	Carriage bolt- 1/4-20 x 5/8
49	150730	Wheel bolt - front
50	150201	Curved washer - 5/16
51	150276	Woodruff key #6
52	150623	Bolt slotted hex #10 x 5/8
53	790451	Ring retainer
54	151944	Bolt machine 10-24 x 2
55	153601	Self tap screw 1/4-20 x 3/4
56	151449	Washer wheel retaining
57	151613	Bolt hex head sems #10-32 x 3/8
58	151621	Screw self drilling #6-20 x 1/2
59	150235	Wing nut 5/16-18
60	151928	Curved head bolt 5/16 - 18 x 1.75
61	152074	Rope stop
62	152405	Bolt carriage 3/8-16 x 3/4
63	152413	Washer plastic 3/4 x 11/32 x .095
64	152421	Washer spring
65	157255	Bolt blade
66	152371	Eyebolt Rope guide
67	152637	Spacer bagger latch
68	110833	Spark Plug Cover
69	153643	Bolt shoulder
70	128686	Height Adjuster Assembly - front
71	154393	Nut Snap in 1/4 - 20
72	153817	Bolt hex head 3/8-16 x 1/2
73	153841	Snapring 7/8
74	153858	Spring washer 7/8
75	152553	Thrust washer 1/2" I.D.
76	153908	Bolt Hook
77	170456	Pulley 3/8" bore
78	170464	Bearing flange ball
79	170530	Pulley ext hub 3/8" bore
80	170670	Pulley drive 1/2" bore
81	170993	Pinion ratchet R.H.
82	170985	Pinion ratchet L.H.
83	170811	Drive pawl
84	170829	V-belt
85	170878	Idler - pulley
86	310151	Nut nylon insert- 5/16-18
87	312322	Bolt hex hd 3/8-16 x 1.75
88	450346	Bolt hex hd 5/16-18 x 3/4
89	326348	Shouldered spacer
90	449587	Bolt hex hd 1/4-20 x 5/8
91	151985	Nut hex 10-24
92	152181	Screw bail retaining
93	451419	Nut TL flange 1/4-20
94	452318	Nut hex nylon insert #10-24
95	457168	Bolt thread form 3/8-16 x 7/8
96	458687	Bolt hex #10-24 x 1/2
97	156851	Bolt 1/4-20x3/8 SHVD HD
98	715011	Hairpin Cotter
99	715037	Nut keps 1/4 - 20
100	715078	Nut flange whiz 1/4-20
101	715086	Locknut hex 3/8-16
102	715193	Roll pin 3/16 x 1
103	715524	Nut hex 3/8 16 Jam
104	715292	Bolt hex head 1/4-20 x 1
105	715300	Washer flat 1/4"
106	156919	Lockwasher 3/8 HD Split
107	715417	Washer - 3/8
108	715508	Nut top lock - 1/4 - 20
109	468801	Sleeve- idler cable
110	789883	E-ring
111	150318	Cable clamp
112	127167	Door assembly*
113	451492	Nut 3/8-16 TopLock
114	153874	Bolt 1/4-20 x 2 1/4

Notes and Specifications

Note: Parts are right or left hand as viewed from the operator position.

Approximate Cutting Heights: 1 1/8" to 3 1/8"

Specifications subject to change without prior notice.

* Indicates optional equipment.

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Exploded View Diagram Description

Parts List

Notes and Specifications

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