--- 7 ---
(Note) When the drill chuck cannot be removed by tapping:
Remove the four Tapping Screws D5 x 40 [1] and the pinion ass'y (assembly of the First Gear [5], Ball Bearing
[3] and the Second Pinion [4]).
Remove the four Seal Lock Hex. Socket Hd. Bolts M3 x 12 [22] and tap the Gear Cover [2] strongly with a
wooden hammer to remove the Chuck Cover [21], Spindle [19] and others together (See Fig. 2). At this time,
be sure to tap on the two screw holes, not the center of the Gear Cover [2]. Otherwise, the Gear Cover [2] may
be deformed.
Secure the J-309 tool in a vise. Insert the pin of the J-309 tool into the hole at the rear of the Gear [20] and
loosen the Drill Chuck 10TLRD [25]. When it is difficult to loosen the Drill Chuck 10TLRD [25] with a hex. bar
wrench, use another tool such as a pipe to lengthen the handle and increase leverage (See Fig. 3).
8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
The [Bold] numbers in the descriptions below correspond to the item numbers in the parts list and exploded
assembly diagram.
8.1 Disassembly
(1) Replacement of the drill chuck
(a) Insert the Chuck Handle 10TLRD [26] into the Drill Chuck 10TLRD [25] until the Drill Chuck 10TLRD [25] is
secured to the Chuck Cover [21] (See Fig. 1). To avoid damage to the Chuck Cover [21], put a cloth between
the Chuck Cover [21] and the Chuck Handle 10TLRD [26].
(b) Insert a flat-blade screwdriver into the Drill Chuck 10TLRD [25] and remove the Flat Hd. Screw (Left Hand)
M5 x 15 [27].
(c) The Drill Chuck 10TLRD [25] is secured to the Spindle [19] with screws. Insert the Chuck Handle 10TLRD
[26] into the Drill Chuck 10TLRD [25] and strongly tap it with a wooden hammer counterclockwise viewing
from the Drill Chuck 10TLRD [25] side. Then the Drill Chuck 10TLRD [25] can be removed.
Fig. 1
Put a cloth to avoid damage to the chuck cover.
Drill Chuck 10TLRD [25]
Flat Hd. Screw (Left Hand) M5 x 15 [27]
Chuck Handle 10TLRD [26]
