Maintenance; Tool Holder - Makita HR4002 Technical Information

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epair
[3] DISASSEMBLY/ASSEMBLY
[3] -10. Fastening Torque of Screw and Bolt
Fasten the specific bolts to the appropriate fastening Torque as shown below.
Size of Hex socket
Item No.
head bolt
14 M6 x 30
85 M5 x 35

[4] Maintenance

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 following parts.
1. Tool holder cap
20. O ring 20
21. Fluoride ring 25
Fig. 60
1
2) Additionally apply approx. 60cc of Makita grease R No.00 to the inside of Crank housing complete.
Fastening torque
Q'ty
4 7.8 - 12.0 N.m
4 2.9 - 4.9 N.m
22. X ring 18
28. O ring 22 on Impact bolt
40. O ring 22 on Piston
Impact bolt

Tool holder

20 21 22
Fig. 59
Barrel complete
Crank housing
complete
Gear housing
complete
Motor housing
Striker Piston
28 40
P 18 / 20