Maintenance Program - Makita HK1820 Technical Information

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -7. Recommended Fastening Torque of Screws and Bolts
Tighten the bolt to the recommended torque described in Fig. 21.
Fig. 21
19

[4] MAINTENANCE PROGRAM

When replacing carbon brush, it is recommended to do the following maintenance at the same time
for longer service life of the machine.
1) Replace the parts described in Fig. 22 with new ones.
2) Wash out or wipe off old grease in Crank housing complete, and lubricate the parts
in accordance with the instructions in [2] LUBRICATION. (Refer to Fig. 1.)
Fig. 22
1
Chuck cover Guide washer Change ring
Steel ball 4.8
Ring 21 Tool holder
9
Item No.
19
Barrel
Crank housing
complete
Impact bolt Striker
23 27 28
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Description
M5 x 25 Hex socket head bolt
Item No.
1
9
23
27
28
37 38
Cylinder Ring 29
37
P 11/17
Q'ty Fastening Torque
4 7.8 - 11.8 N.m
Description
Cap 38
Urethane Ring 26
Steel ball 7.0 (2 pcs)
O Ring 12
Rubber Ring 13
O Ring 18 (thick one)
Connecting rod
Piston
38