P 4/ 17
Repair
[3]DISASSEMBLY/ASSEMBLY [3]-2 Tool holder section
DISASSEMBLING
(1)Disassemble Chuck section. (Figs. 2, 3 and 4)
(2)Removing Retaining ring
(3)Remove Fluoride ring 28 and O ring 23 from Impact bolt when Fluoride ring 28 is worn out as illustrated in Fig. 6.
Fig. 5
1.Tool holder is fixed to Barrel with Retaining ring
Remove the Retaining ring
Retaining ring
Flat washer 29
Barrel
2. Remove Flat washer 29 | 3. Pull off Tool retainer |
and Rubber ring 28. | from Barrel. |
| Tool holder |
Flat washer 29
Rubber ring 28
Barrel 
O ring 38
5. Remove O ring 38 from Tool holder.
4.Remove Impact bolt from Tool holder by pushing out with Screwdriver.
Tool holder
Impact bolt
Fig. 6
When orange colored O ring 23 can be seen through Fluoride ring 28, Fluoride ring 28 and O ring 23 have to be replaced with new ones.
Fluoride ring 28 | O ring 23 |
(the worn one) | (color: orange) |
Impact bolt
ASSEMBLING
(1)When particles and dust are in the inside of Barrel and Crank housing, be sure to clean them up.
(2)Fit O ring 23 into the groove of Impact bolt, and then put Fluoride ring 28 on O ring 23 as illustrated in Fig. 7.
(3)Assemble Tool holder and Chuck section by taking the reverse step of Figs. 5, 4, 3 and 2.
Note: Do not apply any grease to O ring 23, or the Fluoride ring will not shrink even using Taper sleeve.
Be sure to apply Makita grease R.No.00 to the outer surface of Fluoride ring 28 after fitting into Impact bolt.
Fig. 7
Fluoride ring 28
O ring 23
groove on Impact bolt
Fluoride ring 28 is protruded from the groove on Impact bolt.
Note: Once Fluoride ring is expanded, it does not shrink by itself.
If you insert Impact bolt into Tool holder without shrinking Fluoride ring, Fluoride ring will be pinched and broken, or Impact bolt will loose smooth sliding action.
Impact bolt
Taper sleeve (No.1R214)
1) Insert Impact bolt securely into Taper Sleeve from HR5001C marking side.
2) Hold the Impact bolt for at least
60 seconds.
3) Then pull Impact bolt out of Taper sleeve.
Note: If it is hard to pull out Impact bolt, insert a round bar from the opposite side and hit it slightly.
Outer surface of Fluoride ring 28 
O ring 23
groove on Impact bolt
Fluoride ring 28 is fit into the groove on Impact bolt.
Note: If it is hard to pull out Impact bolt, insert a round bar from the opposite side and hit it slightly.
