Ryobi RY401020 40 Volt 21 in. Lawn Mower

Repair Sheet

Product Information

Brand: Ryobi

Model No.: RY401020

Mfg. No.: 107592001

Description: 40 Volt 21 in. Lawn Mower

Revision: 5-20-21 (Rev:01)

The model number and manufacturing location are found on a label attached to the product. Always mention this information in all communications regarding this product and when ordering parts.

Exploded View and Parts List

The following sections detail the components of the Ryobi RY401020 lawn mower through exploded view diagrams and a comprehensive parts list. The diagrams show the arrangement of parts for assembly and repair.

Parts List

Key No.	Part No.	Description	Qty.
1	661189003	Screw (M4 x 18 mm, T20 Torx Pan Hd.)	4
2	318031001	Key Base and Battery Foot Assembly	1
3	660608001	Screw (M4 x 12 mm, T20 Torx Pan Hd.)	2
4	318320001	Battery Housing Top Cover with Labels	1
5	535006001	Battery Housing Front Vent (Left)	1
6	535007001	Battery Housing Front Vent (Right)	1
7	318032001	Power Head LED Assembly	1
8	318030001	Start Key Assembly	1
9	613427001	Motor Axle Bushing	1
10	660004019	Screw (M3 x 12 mm, Phillips Pan Hd.)	2
11	538869002	Hinge Cover	2
12	542861001	Wheel Hub Cap	4
13	281271001	Control Board Assembly	1
14	536862001	Front Battery Housing Plug Cover	1
15	770387001	Electric Wire with Terminal	1
16	663126001	Screw (1/4 in.-20UNC x 31.75 mm, T30 Torx Pan Hd.)	6
17	699475001	Spring	2
18	659320002	Grass Bag Frame	1
19	658929003	Height Adjustment Handle	1
20	970834002	Grass Bag	1
21	534988005	Blade Button	1
22	639118002	Blade Spacer Plate	1
23	663110001	Screw (M10 x 48 mm, Recess Hex Hd.)	2
24	541601002	Trailing Shield	1
25	699325003	Compression Spring	1
26	285001004	Motor Controller	1
27	535014003	Motor Bucket	1
28	742745001	Motor	1
29	542614001	Wire Harness Cover	1
30	638557001	Washer (OD15 x ID6.2 x 0.8t)	4
31	660722002	Screw (M6 x 26 mm)	4
32	699080002	Mulch Cover Spring	1
33	770115001	Wire Connect Switch & Holder Plate	1
34	770099001	Black Lead Wire (14 AWG, 280 mm)	1
35	659324007	Height Adjustment Bracket	1
36	682534001	Blade	1
37	317813001	Deck Assembly (Inc. Labels)	1
38	659706002	Front Axle	1
39	678279004	Cotter Pin	3
40	699325001	Torsion Spring	1
41	659957001	Linkage	1
42	535046001	Wheel Cover	2
43	614676002	Bearing Bushing	2
44	541381002	Rear Door	1
45	541380002	Discharge Baffle	1
46	659707001	Rear Axle	1
47	659746002	Handle Bracket (Right)	1
48	535080003	Motor Fan Blade Adapter	1
49	526920003	Blade Spacer Plate	1
50	679075001	Blade Nut (M10)	5
51	541643002	Mulching Plug	1
52	639116011	Rear Axle Press Plate	2
53	317847001	Top Cover with Labels	1
54	537116002	Carry Handle	1
55	541361003	Side Discharge Door	1
56	317161002	8 in. Wheel Assembly	2
57	317159002	10 in. Wheel Assembly	2
58	674157001	Trailing Shield Pin	1
59	659747002	Handle Bracket (Left)	1
60	614861003	Handle Bushing	2
61	622754001	Rear Door Axle	1
62	698995001	Rear Door Torsion Spring	1
63	678880001	E-Ring	2
64	541644001	Side Discharge Deflector	1
65	698355001	Side Cover Hinge Rod	1
66	664004003	Screw (M.25 x 1 mm, T30 Torx Pan Hd.)	14
67	542610001	Top Cover Door	1
68	681957001	Ball Bearing	8
69	639116012	Front Axle Press Plate	2
70	614652001	Engine Spacer	6
71	661505033	Screw (M8 x 50 mm)	3
72	660629005	Screw (10-14 x .78 mm, T25 Torx Pan Hd.)	3
73	659472001	Retaining Ring	1
74	538937002	Height Adjustment Knob (Right)	1
75	538938002	Height Adjustment Knob (Left)	1
76	535005002	Battery Housing Bottom	1
77	638387005	Washer	14
78	678016006	Nut (1/4 in.)	6
79	317168003	Handle Assembly	1
80	535081001	LED Clear Window Lens	1
81	661189002	Screw (M4 x 10 mm, T20 Torx Pan Hd.)	2
82	663111001	Center Lock Nut (M10)	2
83	682533001	21 in. Top Blade, Stepped	1
84	690698001	Snap Ring (12 mm)	2
85	699563001	Rear Axle Cross Shaft	1
86	682164001	Ball Bearing	2

Not Shown Parts

Operator's Manual: 998000495

Wire Harness Clip: 543394002

Foam: 903802002

Hang Tag Cable Tie: 900333008

Label Parts List

The following table lists various labels and their part numbers for the Ryobi RY401020 lawn mower.

Key No.	Part No.	Description	Qty.
1	940779340	Start Key Warnings Danger Label	1
2	940779339	Danger Label (SP)	1
3	941641001	Cut Finger Label	1
4	941851158	Icon/Danger Label (EN/FR)	1
5	918016070	Start Key Hangtag	1
6	940705546	Ryobi 40V HP Logo Label	1
7	940851690	Instructions Label	1
8	940779337	ONE TOUCH Logo Label	1
9	940851691	PUSH Front Logo Label	1
10	918016067	Handle Instructions Hangtag	1
11	940779354	QR Code Label	1
12	940779353	Battery Wet Conditions/Data Label	1
13	940779331	40V HP BRUSHLESS Logo Label	1
14	940779330	Right Side Crosscut Callout Label	1
15	940779334	Front Crosscut Logo Label	1
16	940779336	Made in the USA Label	1

Wiring Diagram Description

The wiring diagram illustrates the electrical connections within the Ryobi RY401020 lawn mower. Key components shown and connected include:

Battery Foot Assembly
Key Base Assembly
Motor Controller
Motor
Control Board Assembly
LED Lights
Toggle Switches (connected to Black and Yellow wires)
Red, Yellow, and Black wires connecting various components.

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