Ryobi HD420 Repair Sheet page 3

The model number will be found on a label attached to the motor housing. Always mention the model number in all correspondence regarding your
HAMMER DRILL or when ordering parts.
KEY PART
NO. NUMBER DESCRIPTION
1 039803001007 Housing Assembly (HD420)
(Inc. Key Nos. 2 and 15) ....................................1
039803005002 Housing Assembly (HD4201)
(Inc. Key Nos. 2 and 15) ....................................1
2 039803001009 Logo Label ........................................................1
3 039803001018 Mode Shift Button .............................................1
4 039740003029 Impact Plate ......................................................1
5 039803001020 Brush Assembly ................................................1
6 039740003024 Screw (M2.9 x 16 mm, Pan Hd.) .......................4
7 039740003019 Bearing Cover ...................................................1
8 039140001048 Ball Bearing (607-2Z) ........................................1
9 039740003015 Ball Bearing (608-2RZ) ......................................1
10 039803001004 Motor Assembly
(Inc. Key Nos. 7-9) ............................................1
11 039740003001 Output Spindle Shaft
and Gear Assembly ..........................................1
12 039171001006 1/2 in. Chuck .....................................................1
13 039140001012 Chuck Screw (M6 x 25 mm,
RYOBI 1/2 in. HAMMER DRILL – MODEL NUMBER HD420 / HD4201
PARTS LIST
KEY PART
QTY NO. NUMBER
14 039803001016
15 039803001011
039803005001
16 039803001033
17 039140001067
18 039140001066
19 039140001070
20 039803001013
21 039171001014
22 039171001015
23 039803001034
24 039171001002
NOT SHOWN:
990000163
8-30-16
(Rev:03)
3
DESCRIPTION
Special, Left Hand Threads) .............................1
Screw (4.2 x 16 mm, Torx Hd.) .........................9
Data Label (HD420) ...........................................1
Data Label (HD4201) .........................................1
Switch Assembly ..............................................1
Cord Clamp ......................................................1
Screw (M4.2 x 14 mm, Pan Hd.) .......................2
Bend Relief .......................................................1
Power Cord .......................................................1
Chuck Key ........................................................1
Chuck Key Holder .............................................1
Auxiliary Handle Assembly ...............................1
Depth Stop Rod ................................................1
Operator's Manual
QTY