P 3/ 8
Repair
[3]DISASSEMBLY/ASSEMBLY
[3]-1. Keyless Drill Chuck
DISASSEMBLING
Remove Keyless drill chuck as illustrated in Figs. 2 and 3. If it is difficult to remove in this way, Keyless drill chuck can be removed as illustrated in Figs.2A and 3A.
Fig. 2
Correct setting of Hex Wrench 8
Clamp the long portion of Hex wrench 8 when using vise.
Hex wrench 8
Vise
Clamp the flat surface of Hex wrench 8.
Fig. 3
1.Hold Hex wrench 8 with Keyless drill chuck.
2.Firmly gripping the body in the near of Terminal, turn the machine counterclockwise.
Hex wrench 8
Vise
Fig. 2A | Fig. 3A |
| Gap between |
| Keyless drill chuck |
1R139 | and Gear housing |
| |
| 2.5mm in thickness |
| 14mm |
| width groove |
Make the thickness of this portion thin to 2.5mm by grinding in order to insert 1R139 into the gap between chuck and Gear housing.
ASSEMBLING
1.Hold Hex wrench 8 with Keyless drill chuck.
Hex wrench 8
1R139 modified
as shown in Fig. 2A
2.Turn Hex wrench 8 counterclockwise by striking with Hammer.
(1)Do the reverse of the disassembling steps. Refer to Figs. 3 and 2., or Figs. 3A and 2A.
(2)Turn the machine or Hex wrench clockwise to tighten Keyless drill chuck. The fastening torque for Drill chuck is 40 - 45 N.m.
Note: Keyless drill chuck may further turn resisting shaft lock mechanism, while sounding like clutch in work. This phenomenon does not show any trouble, but Keyless drill chuck is tightened firmly.