Hitachi G 13YD Technical Data And Service Manual page 15

(5) Disassembly of the slide knob
1) Loosen the Tapping Screw (W/Flange) D4 x 20 (Black) [53] <53> to pull out the Tail Cover [52] <52>.
2) Hold the Housing [35] <35> and raise the Slide Bar [43] <43> until the Slide Knob [34] <34> moves to the
"ON" position.
3) Check that the Slide Knob [34] <34> has not moved to the "ON-LOCK" position, and push down the Slide
Knob [34] <34> until it clicks while keeping the Slide Bar [43] <43> raised.
4) Raise the Slide Knob [34] <34> straight up and remove it keeping the Slide Bar [43] <43> raised.
(6) Disassembly of the gear (Fig. 6)
1) Loosen the four Seal Lock Screws (W/SP. Washer) M4 x 12 [23] <23> fixing the Packing Gland [22] <22>,
and remove the Packing Gland [22] <22> from the Gear Cover Ass'y [4] <4>.
2) Support the bottom of the Packing Gland [22] <22> with a jig, and push down on the upper portion of the
Spindle [25] <25> with a hand press until the end surface of the Woodruff Key [24] <24> contacts the Ball
Bearing [20] <20> and the Spindle [25] <25> cannot be pushed down any more. Be careful not to deform
the Fringer [26] <26>.
3) Turn the Packing Gland [22] <22> upside down and fix it, then push down the Spindle [25] <25>.
4) Insert the J-128 gear puller (use of a steel plate is permitted as a substitute) between the Gear [17] <17>
and the Packing Gland [22] <22>, and push down the Spindle [25] <25> with a hand press to remove it.
Replace the Ball Bearing [20] <20> with new one every time should the gear be disassembled
because the stress while pulling out the gear is applied to the Ball Bearing [20] <20>.
[24] <24>
[26] <26>
Step 2)
[25] <25>
[20] <20>
[20] <20>
[22] <22>
[25] <25>
[22] <22>
[24] <24>
Step 3)
Fig. 6
--- 12 ---
Gear puller J-128
(Steel plate)
[25] <25>
[24] <24> [17] <17>
[22] <22>
[20] <20>
Step 4)