Makita BTW074 Technical Information page 8

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -4. Bit holder section, Anvil
DISASSEMBLING
(1) Loosen four M4x22 Pan head screws and separate Hammer case complete from Housing set.
See the drawing on the upper left in Fig. 3.
(2) Remove Ring spring 7 as drawn in Fig. 12. And then, remove Anvil as drawn in Fig. 13.
*For Anvil without Ring spring 7, Anvil can be removed as drawn in Fig. 13 skipping Fig. 12.
Fig. 12
Use 1R232 for stabilizing Anvil in the position
where Ring spring 7 can be removed easily.
Ring spring 7
Anvil
1R232
Fig. 13
Anvil and Nylon washer 14 are removed from
Hammer case complete.
ASSEMBLING
(1) Pass Anvil through Nylon Washer 14 and mount them to Hammer case complete. Refer to Fig. 13.
*For Anvil without Ring spring 7, Hammer case section can be assembled to Housing set. Refer to Fig. 3
(2) To stabilize Anvil in the position where Ring spring 7 can be assembled easily, set Hammer case complete
on 1R232. Refer to the drawing on the left in Fig. 12.
(3) Assemble Ring spring 7 as drawn in Fig. 14.
Fig. 14
1. Aligning the cut of Ring
spring 7 with the groove
on Anvil, push the opposite
side of the cut portion
with pliers.
Ring spring 7
Hammer Case Complete
2. The mounted Ring
spring 7 is widened
by just fitting it.
So fasten it with pliers
as shown below.
Remove Ring spring 7 with 1R004.
Ring spring 7
Anvil
Nylon Washer 14
3. For final adjustment, repeatedly
attach and detach a 9.5 mm square
socket such as 1R222 to/from Anvil
to fit Ring spring 7 into the groove
on Anvil.
1R004
Anvil
.
9.5 mm
1R222
P 8/ 15