Repair Guide; Precautions On Disassembly And Reassembly - Hitachi CV 350V Service Manual

Be sure to disconnect the power cord plug from the power supply before conducting repair. Otherwise, the
motor may suddenly turn on, posing a very dangerous situation.

1. Precautions on disassembly and reassembly

[Bold] numbers in the description below correspond to the item numbers in the Parts List and exploded
assembly diagram of the Model CV 350V.
1. Disconnecting the wiring
(1) Loosen the three Screws D4 x 20 [1] and remove Tail Cover (A).(B) Set [33].
(2) Lift up the spring of the Brush Holder [30] and then pull out the Carbon Brush [32].
(3) Pull out the terminal that connects the Carbon Brush [32] and the Stator [23] and remove the Carbon
Brush [32].
(4) Cut the internal wire connected to the Connector [42] at its connection root and remove the Controller
[35].
(5) Desolder the terminal of the Micro Switch [34] and disconnect the internal wire to remove the Micro
Switch [34].
(6) Pull out the wire in the center of the Noise Suppressor [40] from the Housing [27] and remove the
Noise Suppressor [40].
(7) Loosen the two Screws D4 x 16 [39] and remove the Cord Clip [38] and Cord [44].
2. Removing the head case and armature ass'y set
(1) Loosen the four Screws D3 x 16 [25] and remove Head Cover (A).(B) Set [24].
(2) Loosen the four Screws D4 x 20 [1] and remove the Head Case [3] from the Housing [27].
(3) Pull out the Armature Ass'y Set [10].
3. Removing the lever
(1) Place the Head Case [3] on an adequate stand with the Lever [7] fitted to the Lever Guide [9]. Using a
hand press, push the Needle Roller [2] to remove it. Remove the Lever [7] and the Pushing Piece [6].
(2) Loosen the Screw M4 x 6 [8] and remove the Lever Guide [9].
(3) Pull out the Sleeve Cap [4].
4. Disassembling the armature ass'y set
(1) Insert the hooks of a bearing puller between the Bearing Cover [17] and the Bearing Holder [11], and
then remove the Bearing Holder [11].
(2) Remove the Retaining Ring [13].
(3) Insert the hooks of a bearing puller into both ends of the Ball Bearing-R 607VV [14] and remove the
Ball Bearing-R 607VV [14].
(4) Pull out the Balancer [15].
(5) Insert the hooks of a bearing puller into both ends of the Ball Bearing 6000VV [16] and remove the Ball
Bearing 6000VV [16].
(6) After removing the Ball Bearing 6000VV [16], remove the Bearing Cover [17].
5. Removing the stator and slide bar
(1) Remove the Fan Guide [22]. Lightly tap on the Housing [27] where the Head Case [3] was mounted
with a plastic hammer and remove the Stator [23] from the Housing [27].
(2) Push the tab of the Slide Knob [26] inward and remove the Slide Knob [26] and Slide Bar [29].

REPAIR GUIDE

Disassembly
-1-