Hitachi D 10YB Technical Data And Service Manual page 10

Tap on these two holes
from the bottom.
(2) Disassembly of the spindle section
(a) Remove the four Seal Lock Hex. Socket Hd. Botls M3 x 12 [22] and remove the Chuck Cover [21].
(b) Remove the four Tapping Screws D5 x 40 [1] from the Gear Cover [2] and remove the Gear Cover [2] from the
Inner Cover [8]. At this time, the pinion ass'y (assembly of the Ball Bearing [3], Second Pinion [4] and First
Gear [5]) can be removed. If the pinion ass'y remains in the Inner Cover [8], tap the end surface of the Inner
Cover [8], and the pinion ass'y can be removed.
(c) Tap the flush surfaces of the Gear Cover [2] and the Inner Cover [8] with a wooden hammer. Then the pinion
ass'y (assembly of the Ball Bearing [3], Second Pinion [4] and First Gear [5]) can be removed from the Gear
Cover [2] with the First Gear [5] and the Ball Bearing [3] press-fitted.
(d) Use the J-310 tool for disassembly of the Spindle [19] because the Spindle [19] is press-fitted to the Ball
Bearing [18] which is secured to the Gear Cover [2] with the two Flat Fillister Hd. Screws M4 x 10 [17].
Set up the J-310 tool as shown in Fig. 4 and then pull out the Spindle [19] by turning the sleeve clockwise with
a wrench.
(e) Place the Gear [20] on a cylindrical jig and press down on the Spindle [19] to remove the Gear [20] from the
Spindle [19] (See Fig. 5).
( f ) Remove the Flat Fillister Hd. Screw M4 x 10 [17] from the Ball Bearing [18] and tap the Gear Cover [2] with a
wooden hammer. Then, the Ball Bearing [18] can be removed.
Holder plate (J-310)
Flat Fillister Hd. Screw M4 x 10 [17]
Gear Cover [2]
Fig. 2
Sleeve (J-136)
Left-hand screw
Spindle [19]
Gear Cover [2]
J-309 tool
Fig. 3 Secured to the vise.
Sleeve nut (J-310)
Ball Bearing [18]
--- 8 ---
Hex. bar wrench
Drill Chuck 10TLRD [25]
Gear [20]
Secure two pins of the
J-309 tool into the holes
at the rear of the gear.
Pin (J-309)
22 mm wrench
Gear [20]
Fig. 4