Hitachi DB 3DL Technical Data & Service Manual page 19

(4) Reassembly of the deceleration mechanism

(a) Apply grease (Hitachi Motor Grease No. 29) to the engaging portions of each gear and the needle roller

unit, and the contacting surfaces of the steel balls of the ring gear properly.

(b) Mount the parts from the Pin Set (3 pcs.) [13] to Washer (A) [28] to the part assembled in the following (2)

in order. (See Fig. 6.)

(1) Mount the Pin Set (3 pcs.) [13] and the Steel Ball D3 [14].

(2) Pay attention to the mounting direction of the Ring Gear [20], Carrier [18], Pinion (C) [22] and Pinion

(B) [25]. (See Fig. 6.)

[18]

[19]

[20]

[28]

(5) Reassembly of the drive unit

(a) Pay attention to the mounting direction of the Motor [31] and the Switch (W/Lock) [40]. Insert the red-

marked terminal of the Motor [31] into the terminal at the lock switch side of the Switch (W/Lock) [40].

At this time, insert each terminal of the Motor [31] between the terminal and the convex portion of the

Switch (W/Lock) [40]. (See Fig. 7.)

[31]

(b) Mount the Motor Spacer [30] to the Motor [31] with the two Machine Screws (W/Sp. Washer) M2.6 x 8 [29].

Do not mistake the head and the tail of the Motor Spacer [30]. Note that there is no difference in

circumferential direction. Pay attention to the mounting direction when mounting the Motor [31] to the Gear

Box Ass'y [1]. (See Fig. 8.)

[21]

[22]

[23]

[24]

[25]

[26]

Lock switch

Red mark

Terminal

Terminal

[11]

[17]

[27]

Fig. 6

Switch (W/Lock) [40]

Terminal

Fig. 7

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[13]

[14]

[15]

[16]

Enlarged section A

Convex portion