Makita BST220 Technical Information page 5

R
epair
[4] DISASSEMBLY/ ASSEMBLY
[4]-3. Hammer, Cushion (cont.)
ASSEMBLING
1) As illustrated in Fig. 15, set Compression springs 13 and 9 in place on Guide bolt after installing Flat washer 8.
2) Pass Guide bolt through Driver lock. While pressing the compression springs onto worktable, mount the following parts
on Compression spring 13.
- M6 Hex. nut
- Holder
- Flat washer 6
- Cushion
- Driver lock
- Spring holder
Note: 1. When loosening Guide bolt, apply ThreeBond
1303B or Loctite 272 to the thread of Guide bolt.
2. Fit the inner lip of Cushion into the groove on
Guide bolt completely, or M6 Hex. nut will not
be installed firmly to the thread of Guide bolt.
Fig. 16
thread of Guide bolt
3) Move Spur gear 55 complete until the roller portion is placed as illustrated in Fig. 18, and secure Pin 10 to Housing L by
tightening 4x18 Tapping screw.
4) Mount Safety lever on Housing L.
5) Cover Hammer driving section with Guide plate, and install them into Housing L. (Fig. 18)
6) Check that Safety lever can be slid smoothly.
7) Secure both ends of Hammer driving section with 4x18 Tapping screws (2pcs.) and Fix plate. (Fig. 9)
8) Move Safety lever to the forward position to the full. And then put Set plate between Holder and Driver guide complete.
Fasten them to Magazine section by tightening M5x18 Hex. socket head bolts (2pcs.). (Fig. 19)
9) Secure Safety lever guide by tightening M4x6 Hex. socket head bolts (2pcs.). (Fig. 10)
10) Set Compression spring 4 in place. (Fig. 19)
Fig. 18
Roller portion of Spur gear 55 complete
4x18 Tapping
has to be placed as illustrated.
screw
Pin 10
Safety lever
Fig. 17
M6 Hex. nut
Driver lock
Guide plate
Hammer driving section
Fig. 15
Compression spring 13 Compression spring 9
Flat washer 6
Holder Driver lock
Fig. 19
M5x18 Hex. socket head bolt (2pcs.)
Safety lever guide
P 5/ 9
Flat washer 8
Guide bolt
Spring holder
inner lip of Cushion
Holder
Set plate
Driver guide
complete
Spring base
Compression
spring 4