Makita HK1820 Technical Information page 5

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Barrel, Tool Holder, Cylinder Section
DISASSEMBLY
3) Separate Tool holder from Cylinder section as described in Fig. 7.
4) Disassemble Impact bolt and Cylinder section as described in Fig. 8.
Fig. 7
1. Pull out Striker from
Cylinder section.
Cylinder section
Striker
4. By removing Pin 6, Tool holder can be separated from Cylinder section.
Remove Rod 2.5 (3 pcs) from the grooves of Cylinder.
Screwdriver,
magnetized with 1R288
Pin 6 (3 pcs)
Note: Pin 6 can be removed as described below if it is difficult to remove.
1. Apply magnetized
screwdriver to Pin 6.
Screwdriver,
magnetized with 1R288
Pin 6
Tool holder
Cylinder
Fig. 8
Disassembling Impact Bolt Section
Rubber ring 13
Impact bolt Flat washer 12
2. Remove ring 25, Urethane ring 26
and Ring spring 37 from Cylinder.
Ring 25
Ring spring 37
Urethane ring 26
Tool holder
Rod 2.5 (3 pcs)
Cylinder section
2. Align the through hole
of Tool holder with that
of Cylinder by pushing
Tool holder.
Disassembling Cylinder Section
After removing O Ring 26, the following parts
can be removed from Cylinder:
Cup washer 29, Compression Spring 32, Ring 29
Ring 29
Cylinder
Compression Spring 32
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3. By removing Ring 39, you can see
Pin 6 (3 pcs) that join Tool holder
with Cylinder.
Ring 39
5. Push out Impact bolt section from
Cylinder section using screwdriver.
Impact bolt section
3. Remove Pin 6 using
magnetized screwdriver
when the two holes are
aligned.
Cup washer 29
O Ring 26
P 5/17
Pin 6 (3 pcs)