Tool Holder - Makita HR4002 Technical Information

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Chuck Section
ASSEMBLE
Do the reverse step of disassembling. Refer to the illustrations from Fig. 2 to Fig. 9.
[3] -2. Tool Holder Section and Barrel Complete
DISASSEMBLE
1) In case of HR4002, it is not necessary to disassemble Chuck section, when repairing inside of Tool holder section.
Remove Barrel complete together with Chuck section. (Fig. 10)
2) Check whether Fluoride ring 25 is worn out.
When O ring 20 (orange color) under Fluoro carbon resin ring 25 can be seen, Fluoride ring 25 is worn out. (Fig. 11)
Be sure to replace not only Fluoride ring 25 but also O ring 20 and X ring 18.
3) Check whether there has been dust in the Tool holder. If yes, be sure to clean up Tool holder.
Fig. 10
Pull off Barrel complete, while pushing Impact bolt
with Screwdriver toward Piston in Slide sleeve
so that the Impact bolt remains in the Slide sleeve.
Screwdriver
Hex socket head
bolt M6x30: 4 pcs.
4) For removing Flat washer 45 and Urethane ring 45 from Tool holder, chuck section has to be disassembled as
illustrated in page 3.
5) Disassemble Tool holder from Barrel complete, by striking it with plastic hammer. (Fig. 12)
6) Remove Urethane ring 45 and Flat washer 45 by pushing them toward the Bit installing side of Tool holder. (Fig. 13)
Fig. 12
Urethane ring 45
Flat washer 45
Impact bolt
Slide sleeve

Tool holder

Barrel complete
Now Impact bolt comes into your sight.
Fig. 11
Barrel
Urethane ring 45
Flat washer 45
Tool holder
Fig. 13
Tool holder
P 4 / 20
O ring 20
(orange color)
X ring 18
Impact bolt
Worn Fluoride ring 25
Urethane ring 45
Flat washer 45