Page 1
RYOBI
30cc STRING TRIMMERS
MODEL NUMBERS RY34420, RY34440
REPAIR SHEET
Page 2
FIGURE A
1
3
2
28
4
27
21
22
5
6
2
24
10
26
16
15
19
17
18
23
25
14
20
11
30
29
8
12
9
31
13
7
RYOBI 30cc STRING TRIMMERS
MODEL NUMBERS – RY34420, RY34440
2
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RYOBI 30cc STRING TRIMMERS
MODEL NUMBERS – RY34420, RY34440
PARTS LIST (FIGURE A)
KEY PART
NO. NUMBER DESCRIPTION QTY
1 660563002 Screw (M4 x 20 mm) .............................................. 4
2 120950026 Control Handle Assembly ...................................... 1
3 518695002 Trigger Lock ........................................................... 1
4 638431001 Strap Hanger ......................................................... 1
5 760700002 Switch (Momentary Contact) ................................. 1
6 570234002 Rear Handle ...........................................................1
7 678029002 Hex Nut (M6.3 x 1) ................................................. 1
8 310586001 Fuel Cap Assembly ................................................ 1
9 120950027 Air Box Cover (Incl. Key No. 26) ............................ 1
10 310302001 Oil Cap/Dipstick (Incl. Key No. 31) ........................1
11 870217001 Spark Plug (Champion RZ7C) ...............................1
12 660634001 Screw (#8-16 x 5/16 in.).........................................1
13 T660697001 Bolt (M6 x 1 x 30 mm) ...........................................1
14 660510004 Screw (M5 x .8 in.) ................................................. 1
15 308991001 Front Handle Assembly
(Incl. Key No. 16-19) .............................................. 1
16 518738001 Front Handle .......................................................... 1
KEY PART
NO. NUMBER DESCRIPTION QTY
19 518949001 Wing Nut (1/4-20) ..................................................1
20 518142002 Top Cover ..............................................................1
21 518696002 Throttle Trigger ......................................................1
22 690694002 Throttle Trigger Spring ...........................................1
23 518366001 Hanger Cap ...........................................................1
24 308439014 Throttle Cable and Lead Assembly
(Incl. Key No. 5) .....................................................1
25 940680023 Hot Surface Label ..................................................1
26 940734040 Starting Label ........................................................1
27 120950028 Upper Boom Assembly (Incl. Key No. 28) ............. 1
28 940230132 Warning Label ........................................................ 1
29 940705020 Logo Label .............................................................1
30 940991026 C430 Label (RY34420) ...........................................1
940991027 S430 Label (RY34440) ........................................... 1
31 570400001 O-Ring ................................................................... 1
987000405 Operator’s Manual (960646002) ............................ 1
9-17-08
(REV:00)
17 660643008 Bolt (1/4-20 x 40 mm) ............................................ 1
18 678008001 Washer (1/4 in.) ...................................................... 1
3
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FIGURE B
1
2
3
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
35
36
37
38
39
40
41
30
30
31
32
33
34
RYOBI 30cc STRING TRIMMERS
MODEL NUMBERS – RY34420, RY34440
4
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RYOBI 30cc STRING TRIMMERS
MODEL NUMBERS – RY34420, RY34440
PARTS LIST (FIGURE B)
KEY PART
NO. NUMBER DESCRIPTION QTY
1 511731004 Starter Grip ............................................................ 1
2 900849002 Starter Rope .......................................................... 1
3 660466001 Screw (M4 x 18 mm) ............................................. 7
4 660970001 Screw (M4 x 16 mm) ............................................. 4
5 310304001 Starter Housing Assembly .................................... 1
6 300960002 Clutch Assembly ................................................... 1
7 638090001 Washer .................................................................. 1
8 518994001 Starter Baffle ......................................................... 1
9 638033001 Spring & Container ................................................ 1
10 310022001 Easy Starter Assembly .......................................... 1
11 518996001 Air Dam ................................................................. 1
12 638389001 Pulley Retainer ...................................................... 3
13 638284002 Spacer Tube .......................................................... 1
14 650017001 Washer .................................................................. 1
15 309011001 Flywheel Assembly ................................................ 1
16 309921001 Short Block Assembly ........................................... 1
17 590462002 Washer .................................................................. 3
18 660970008 Screw (M4) ............................................................ 3
19 310585001 Fuel Tank & Cap Assembly
(Incl. Key Nos. 17-18) ............................................ 1
20 678180002 Nut (M5 x 0.8) ........................................................ 2
21 518960001 Air Filter Base ........................................................ 1
KEY PART
NO. NUMBER DESCRIPTION QTY
22 309368001 Carburetor Assembly ............................................ 1
23 518692002 Air Baffle ................................................................ 1
24 900809002 Carburetor Gasket ................................................. 1
25 660629003 Screw (M5 x 23 mm) ............................................. 2
26 518143001 Heat Dam .............................................................. 1
27 661509001 Bolt ........................................................................ 2
28 901657002 Heat Dam Gasket .................................................. 1
29 570710002 Breather Hose ....................................................... 1
30 308826002 Check Valve ........................................................... 2
31 570710003 Breather Hose ....................................................... 1
32 570710004 Breather Hose ....................................................... 1
33 570401001 Breather Fitting ...................................................... 1
34 660466002 Screw (M4 x 12 mm) ............................................. 3
35 518995001 Muffler Housing .................................................... 1
36 901702001 Muffler Gasket ....................................................... 1
37 309320001 Muffler Assembly .................................................. 1
38 661143001 Muffler Bolt (M5 x 42 mm) ..................................... 2
39 308863022 Electrical Lead Wire Assembly .............................. 1
40 309263002 Ignition Module ..................................................... 1
41 660968001 Screw (M4 x 19 mm) ............................................. 2
5
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FIGURE C
7
9
10
11
12
13
14
6
3
4
2
1
5
15
8
6
5
4
7
8
11
9
12
2
1
10
14
13
3
16
17
18
19
20
21
22
15
MODEL
RY34420
RYOBI 30cc STRING TRIMMERS
MODEL NUMBERS – RY34420, RY34440
FIGURE C
MODEL
RY34440
Key Service
No. Number Description Qty.
1 940627024 Expand-it Label ...................................................................... 1
2 940230132 Warning Decal ....................................................................... 1
3 308038010 Curved Shaft Assembly ......................................................... 1
4 120642001 Fastener Kit ............................................................................ 1
5 308052001 Grass Deflector ...................................................................... 1
6 308042002 Spool Retainer (Black)............................................................ 1
7 308925001 Pro Cut II String Head ............................................................ 1
8 120950011 Pro Cut II String Head Assembly ........................................... 1
9 308827002 Housing .................................................................................. 1
10 678749001 Spring ..................................................................................... 1
11 308924001 Spool ...................................................................................... 1
12 660650001 Bolt (5/16-18 x 1/2 in.) ........................................................... 1
13 518803001 Knob ....................................................................................... 1
14 518804001 Cover ...................................................................................... 1
15 120950010 Reel Easy String Head Assembly ........................................... 1
Key Service
No. Number Description Qty.
1 940627024 Expand-it Label ...................................................................... 1
2 940230132 Warning Decal ........................................................................ 1
3 308035011 Straight Shaft Assembly ........................................................ 1
4 660736001 Screw (10-24 x 5/8 in.) ........................................................... 1
5 638125001 Clamp ..................................................................................... 1
6 518367001 Spacer .................................................................................... 1
7 660642001 Screw (1/4-20 x 1-1/4 in.) ...................................................... 1
8 308210002 Gear Head .............................................................................. 1
9 678011002 Flanged Washer ..................................................................... 1
10 678019002 Arbor ...................................................................................... 1
11 660886001 Wing Screw (1/4-20 x 1-1/4 in.) ............................................. 1
12 308473001 Grass Deflector Assembly ..................................................... 1
13 308925001 Pro Cut II String Head ............................................................ 1
14 308042003 Spool Retainer (Red) .............................................................. 1
15 120950011 Pro Cut II String Head Assembly ........................................... 1
16 308827002 Housing .................................................................................. 1
17 678749001 Spring ..................................................................................... 1
18 308924001 Spool ...................................................................................... 1
19 660649001 Bolt (5/16-18 x 1/2 in. LH) ...................................................... 1
20 518803001 Knob ....................................................................................... 1
21 518804001 Cover ...................................................................................... 1
22 120950010 Reel Easy String Head Assembly ........................................... 1
6
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