Ryobi CSB121 Quick setup guide

RYOBI
Double Insulated 7-1/4 In.
Circular Saw
Model No. CSB121
Repair Sheet

2
RYOBI CIRCULAR SAW – MODEL NUMBER CSB121
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2
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9
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67
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15 16
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18 19
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* 23
25
* 24
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8
FIGURE A
SEE FIGURE B
33
32
* Note: Changes start with Date Code
0648 and Serial Number 18850

3
RYOBI CIRCULAR SAW – MODEL NUMBER CSB121
The model number will be found on a label attached to the motor housing. Always mention the model number in all correspondence regarding your
CIRCULAR SAW or when ordering parts.
PARTS LIST
(Figure A)
KEY PART
NO. NUMBER DESCRIPTION QTY
KEY PART
NO. NUMBER DESCRIPTION QTY
1 9429813 Data Plate .......................................................1
2 9427576 Spindle Lock Decal.........................................1
3 9429810 Logo Plate.......................................................1
4 974900001 Bumper ...........................................................1
5 982492131 Screw (8-32 x 3/4 in., Fil. Hd.) ........................1
6 982481001 Gear and Spindle Assembly ...........................1
7 6880601 Sleeve Bearing................................................1
8 680022003 Hex Nut...........................................................1
9 6621205 Screw (M4 x 8 mm).........................................1
10 6454601 Lower Blade Guard Support...........................1
11 610122003 Screw (8-32 x 3/8 in., Pan Hd.).......................3
12 967952001 Torsion Spring.................................................1
13 6447602 Lower Blade Guard ........................................1
14 718602804 Retaining Ring ................................................1
15 999982001 Inner Blade Washer.........................................1
16 6885605 Saw Blade.......................................................1
17 998463001 Outer Blade Washer........................................1
18 623547002 Spring Washer ................................................1
19 612999001 Blade Screw....................................................1
20 615954003 Screw (8-18 x 3/8 in., Pan Hd.).......................2
21 5918001 Handle Lever...................................................1
22 621433018 Carriage Bolt (1/4-20 x 3-3/4 in.) ....................1
23 *680980003 Roll Pin............................................................1
6898001 Roll Pin............................................................1
24 *300530024 Base Assembly ...............................................1
3053005 Base Assembly ...............................................1
25 621438006 Wing Nut .........................................................2
26 614658010 Screw (8-32 x 5/8 in., Pan Hd.).......................1
27 706404007 Hex Nut (8-32).................................................1
28 621433001 Carriage Bolt (1/4-20 x 5/8 in.) .......................1
29 5542301 Spacer ............................................................1
30 974716001 Wrench............................................................1
31 9426410 Warning Tag ....................................................1
32 931744059 Flat Washer.....................................................2
33 550828004 Knob Bolt........................................................1
Not Shown:
3063680 Carrying Case .................................................1
982829001 Optional Dust Nozzle Kit.................................1
983000126 Operator’s Manual
2-20-12
(Rev:04)
* Note : Changes start with Date Code
0648 and Serial Number 18850

4
RYOBI CIRCULAR SAW – MODEL NUMBER CSB121
WARNING: Improper repair of a double insulated tool can result in damages to the double insulation system possibly causing electrical
shock or electrocution. Any repairs requiring disassembly of your tool requires safety testing and should only be performed by a Ryobi Autho-
rized Service Center. For the service center nearest you call 1-800-525-2579.
1
8
2
34
5
18 20
21 * 22
23
24
19
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11 1
10
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9
1
1
1
15
FIGURE B
25
26
27
* Note : Changes start with Date Code
0648 and Serial Number 18850

5
RYOBI CIRCULAR SAW – MODEL NUMBER CSB121
The model number will be found on a label attached to the motor housing. Always mention the model number in all correspondence regarding your
CIRCULAR SAW or when ordering parts.
PARTS LIST
(Figure B)
KEY PART
NO. NUMBER DESCRIPTION QTY
1 968702007 Screw (8-16 x 1/2 in., Pan Hd.) ........................................................................................ 11
2 5917702 Handle Cover ..................................................................................................................... 1
3 6880001 Torsion Spring .................................................................................................................... 1
4 5532203 Switch Trigger .................................................................................................................... 1
5 7621301 Switch ................................................................................................................................ 1
6 6620613 Screw ................................................................................................................................. 2
7 6933702 Clamp Plate........................................................................................................................ 1
8 5917802 Handle Support.................................................................................................................. 1
9 730372017 Cord ................................................................................................................................... 1
10 5927401 Bend Relief......................................................................................................................... 1
11 5917901 End Cap ............................................................................................................................. 1
12 617800002 Clamp................................................................................................................................. 2
13 968173001 Brush Assembly ................................................................................................................. 2
14 982500131 Screw (10-24 x 3/4 in., Pan Hd.) ........................................................................................ 1
15 982500137 Screw (10-24 x 1-1/8 in., Pan Hd.)..................................................................................... 2
16 5531904 Motor Housing ................................................................................................................... 1
17 5579301 Wire Holder ........................................................................................................................ 1
18 200215009 Field Assembly................................................................................................................... 1
19 972147022 Screw (8-10 x 2-1/8 in., Pan Hd.)....................................................................................... 2
20 5542103 Shaft - Gear Rack .............................................................................................................. 1
21 621342000 Spring................................................................................................................................. 1
22 *640545006 Upper Blade Guard ............................................................................................................ 1
640545002 Upper Blade Guard ............................................................................................................ 1
23 6942701 Rack - Shaft Lock .............................................................................................................. 1
24 968149003 Sleeve Bearing ................................................................................................................... 1
25 200216011 Armature Assembly (Inc. Key Nos. 26-27) ......................................................................... 1
26 680141020 Ball Bearing (608zz)............................................................................................................ 1
27 680894001 Ball Bearing (6001 LLU) ..................................................................................................... 1
* Note: Changes start with Date Code
0648 and Serial Number 18850

6
RYOBI CIRCULAR SAW – MODEL NUMBER CSB121
WIRING DIAGRAM
POWER CORD
SWITCH
BLACK
BLACK
WHITE
RED
BRUSH LEAD
MOTOR
RED
BRUSH LEAD
WHITE