HITACHI SV 8SA, SV 12SF User guide

MODELS SV 8SA/SV 12SF

1. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY

Please pay particular attention to the following items during disassembly and reassembly. Since the SV 8SA and the SV 12SF are of the same structure, explanation is given only on the Model SV 8SA.

[Bold]

The

numbers in the description correspond to the item numbers in the parts exploded diagram of the

SV 8SA and the numbers in

1-1. Disassembly 1-1-1. Remove the Felt Pad or the Pad [19] <19>

Remove the Felt Pad or the Pad

1-1-2. Remove the Base [18] <18>

Remove the Base

[18] <18>

Base

1-1-3. Remove the Fan Guide [34] <34>

Remove the Fan Guide

1-1-4. Remove the Thrust Washer [32] < 32> , t he Ball Bearing 6001 DDUCM [31] <31> , the Dust Washer [30] <30> and the Balancer Fan [29] <29>

Remove the Thrust Washer

[30] <30>

and the Balancer Fan

[18] <18>

in the arrow-indicated direction.

<Bold>

together with the Paper Clips

[34] <34>

[32] <32>

to those in the parts exploded diagram of the SV 12SF.

[19] <19>

removing the two D4 x 20 Tapping Screws

[29] <29>

by removing the four M4 x 10 Machine Screws

, the Ball Bearing 6001 DDUCM

by removing the M4 x 12 Machine Screw

[37] <37>

and the Felt

[35] <35>

[31] <31>

[20] <20>

[36] <36>

, the Dust Washer

[33] <33>

by pulling out the

[18] <18>

[19] <19>

[20] <20>

[29] <29>

[30] <30> [31] <31>

[32] <32> [33] <33>

[34] <34>

[35] <35>

[36] <36>

Pull out

[37] <37>

Fig. 3

−

−#

1-1-5. Remove the Housing (B) [3] <3> and the Legs [16] <16>

After removing the Base

along the perforations with a cutter. Then remove the four Tapping Screws with D4 Flanges

<4>

securing the Housing (A) Legs

[16] <16>

can be removed by pulling them out of the Housing (A)

[18] <18>

[12] <12>

and the Balancer Fan

and the Housing (B)

[29] <29>

[3] <3>

as indicated above, cut the Grip Tape

together, and the latter can be removed. The

[12] <12>

or the Housing (B)

1-1-6. Disassembly of the A rmature [28] <28>, the Stators [25] <25> and O t her Parts

(1) Remove the two Carbon Brushes

(A)

[12] <12>

[15] <15>

(2) Loosen the positive (+) terminal screw of the Slide Switch

and remove the lead wires of the Noise Suppressor lead wires of the Stator

[25] <25>

(3) Loosen the negative (-) terminal screw of the Pillar Terminal

screwdriver and remove the lead wires of the Cord

[25] <25>

, and the parts inside the Housing can then be removed.

(4) With a bearing puller, pull of the two Ball Bearings 608 VVC2

Armature

[28] <28>

by lifting the Brush Holders

with a Phillips screwdriver

[5] <5>

[22] <22>

(excl. the U.S.A.) and Cord

[21] <21>

[10] <10>

and the lead wires of the Stator

[24] <24>

[14] <14>

off the Housing

with a flat-blade

press-fitted on both ends of the

[2] <2>

[10] <10>

[4]

[3] <3>

and the

1-2. Reassembly

Proceed as follows, paying particular attention to the it ems below.

1-2-1. Assembly of the Armature [28] <28> and the Stators [25] <25>

(1) With a hand press, press the two Ball Bearings 608VVC2

[24] <24>

until they hit against the stepped

portion of the Armature Shaft.

(2) Place the Stators

and make sure that the Armature

<12>

[25] <25>

and the Armature

[28] <28>

in sequence within the Housing (A)

can turn freely.

1-2-2. Installing the Balancer Fan [29] <29> and the Dust Washer [30] <30>

When inserting the Balancer Fan

[29] <29>

observe the proper direction of the Dust Washer

into the Armature Shaft, bring their flat faces into alignment. Also

[30] <30>

. (See Fig.4.)

Armature Shaft flat portion

Bring this flat face into alignment with that of the Armature Shaft.

[12]

[28] <28>

[24] <24>

Install this with the recessed side facing the Balancer Fan

[29] <29>

[30] <30>

Fig.4

−#2 −

1-2-3. Installing the Base [18] <18>

Install the Legs fitted within the Ribs. (See Fig.5.)

1-3. Screw Tightening Torque

D4 x 10 Tapping Screws with Flange D4 x 16 Tapping Screws with Flange D4 x 20 Tapping Screws with Flange D4 x 20 Tapping Screws M4 x 10 Machine Screws M4 x 12 Machine Screw

Pillar Terminals with terminal screws......... 0.39 ± 0.1 N

Slide Switch with terminal screws .............. 0.39 ± 0.1 N

1-4. Wiring and Connecting Diagrams

[16] <16>

so that their lower parts are

1.96 ± 0.49 N

1.8 ± 0.4 N

Rib

⋅⋅⋅⋅

m (20 ± 5 kgf-cm)

⋅⋅⋅⋅

m (18 ± 4 kgf-cm)

⋅⋅⋅⋅

m (4 ± 1 kgf-cm)

⋅⋅⋅⋅

m (4 ± 1 kgf-cm)

Lower part

[18] <18>

Fig. 5

Perform the wiring as follows.

With the internal wire pointed at A, insert the Tab Terminal (blue)

With the internal wire pointed at A, insert the Internal Wire (brown)

Tab Terminal Press the Tab Terminal deeply into position.

[7] <7>

Fig. 6 Internal Wires Assembl y Positions (View from Commutator Side)

[7] <7>

[6] <6>

A-A

With the internal wire pointed at B, insert the Internal Wire (blue)

[26] <26>

With the internal wire pointed at B, insert the Tab Terminal (brown)

[27] <27>

B-B

Internal Wire Press the Tab Terminal deeply into position.

[6] <6>

Fig. 7 Inserting Direction of I nt er nal Wires

−#3 −

Press the Tab Terminal deeply into position. Internal Wire

Press the Tab Terminal deeply into position. Tab Terminal

[26] <26>

[27] <27>

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