Makita BTP131 Technical Information page 7

R
epair
[3]-1 Impact Assembly, Anvil
DISASSEMBLING
(6) Remove Retaining ring WR-15 (Fig. 7-1).
Follow the steps 2. and 3. below for removing Retaining ring WR-15 when it can not be removed with Pliers
because of deviation to Bit holder side from the position where it should be.
Fig. 7
1. Remove Retaining ring WR-15
with 1R003 and 1R212.
Retaining ring
WR-15
Cam A
(7) Disassemble Anvil (Fig. 8).
Fig. 8
1. Set Gear case assembly to 1R351
by inserting Anvil wings in
Deep notches of 1R351.
Deep notch
1R351
4. Remove Nylon washer 15 and O ring 12.5 from Anvil.
Nylon washer 15
O ring 12.5
2. Put Anvil wings onto Shallow
notches of 1R351 and set 1R390
to Retaining ring WR-15.
1R390
Retaining ring
WR-15
Shallow notch
1R351
2. Press down Anvil with
Arbor press.
Anvil wings
O ring 12.5
Anvil
Anvil wings
3. Anvil drops in Deep notches of 1R351.
So, Anvil and Cam A are removed
from Gear case assembly.
Cam A
1R351
5. Remove Cam B, 22 pcs of Steel ball 3
and Cup washer from Gear case assembly
by pushing them toward Bit holder side.
Steel ball 3 (22 pcs.)
Cam B
3. Press the 1R390 with Arbor press.
So, Cam A returns to the place
where it should be.
Now, Retaining ring WR-15 can be
removed with Pliers.
1R351
Anvil
1R351
Cup washer
P 7/ 18
1R351