Hitachi CG 25SC Manuale utente

PRODUCT NAME

Hitachi 250 mm Grass Trimmer

Model CG 25SC

Hitachi 300 mm Grass Trimmer

Model CG 30SC

LIST No.

xxx. 2014

REPAIR GUIDE ----------------------------------------------------------------------------------------------------------------- 1

1. Precautions on disassembly and reassembly -----------------------------------------------------------1

STANDARD REPAIR TIME (UNIT) SCHEDULES ------------------------------------------------------------------ 12

CONTENTS

CG 25SC

LIST Nos.

CG 25SC:

CG 30SC:

May 2015

Overseas Sales Division

Page

-1-

Fig. 2

Fig. 1

WARNING: Before conducting repair, be sure to turn off the power switch and disconnect the

power cord plug from the power source outlet.

1. Precautions on disassembly and reassembly

[Bold] and <Bold> numbers in the description below correspond to the item numbers in the parts lists and

exploded assembly diagrams of the Models CG 25SC and CG 30SC, respectively.

CAUTION: Be careful not to cut your finger with the Blade [51] located on the back of the

Protecting Cover [50].

1. Disassembling the housing section

(1) Open the Guide [43] wide and detach it from the housing

as shown in Fig. 1.

(2) Pull up the Upper Cover [49] from the Wire Roll Support [41] while pushing in its two latches together.

Remove the Wire Roll [47] with the nylon wire and Spring (D) [46]. Next, remove the Screws ST4 x 12

[10]. Turn the Protecting Cover [50] in the arrow direction as shown in Fig. 2 to remove it.

[41]

[49]

Latch (2 pcs.)

[47]

[49]

[50]

[10]

[46]

Disassembly of the Model CG 25SC

REPAIR GUIDE

[43]

[50] [10]

[48]

[51]

-2-

Fig. 3

(3) Remove the eight Screws ST4 x 16 [4] from Housing (R) [29] and Housing (L) [35]. Detach the Motor

[39] with the Wire Roll Support [41], Button [32], Lock Pin [33], and Spring (C) [34] as shown in Fig. 3.

(4) Remove the two Screws ST3 x 6 [30] from the Pipe Ass'y [24] to remove the Spacer [31] as shown in

Fig. 3.

2. Removing the motor

(1) Use a hex. bar wrench to turn the Cap [45]

inside the Wire Roll Support [41]. The Cap [45]

comes off together with the M5 Nut [44].

(2) The Wire Roll Support [41] is press-fitted to the

Motor [39]. Use a large bearing puller to remove

it. For easy removal of the support, use the two

side holes of the Wire Roll Support [41] and the

end of the Motor [39] shaft. The Wire Roll

Support [41] is in contact with the ball bearing

of the Motor [39] as shown in Fig. 4.

[4]

[32] [33] [34] [10] [11]

[38]

[39]

[29]

Fig. 4

[39]

[41]

[44]

[45]

[35]

[30]

[24]

[31]

[40]

-3-

Fig. 6

3. Disassembling the handle section

(1) First, remove the Hanger Ass'y [16] and then

use a flat-blade screwdriver to pry off the

Handle Ring [25].

NOTE: Apply a piece of cloth to the flat

end of the screwdriver to protect

parts.

(2) Remove the six Screws ST4 x 16 [4] from Handle (R) [5] and Handle (L) [13]. Remove the Trigger [8],

Spring (A) [9], Spring (B) [14], and the Lock Off Button [12] as shown in Fig. 6.

(3) Remove the two Screws ST4 x 12 [10] from each of the three Cord Clips [11] to remove the Cord [1]

from the body.

Fig. 5

[1]

[2]

[3]

[8] [9] [10] [11]

[12] [13]

[11]

[16]

[15]

[24]

[25]

[10]

[14]

[7]

[6]

[5]

[4]

[25]

Apply a piece

of cloth here.

Flat-blade screwdriver

[16]

-4-

Fig. 8

Reverse the disassembly procedure to reassemble the Model CG 25SC. However, pay particular attention

to the following.

1. Notices on reassembly

(1) Press-fit the Wire Roll Support [41] to the Motor [39] until the

Wire Roll Support [41] contacts the ball bearing of the Motor

[39].

NOTE: Do not press-fit with excessive force. Otherwise,

the Wire Roll Support [41] may be broken.

After press-fitting, put the Cap [45] on the M5 Nut [44] and

tighten it to the shaft of the Motor [39].

NOTE: Do not press-fit with excessive force. Otherwise,

the Cap [45] may fall off.

NOTE: The wire roll support of the Model CG 25SC is

similar to that of the Model CG 30SC but they are

not interchangeable (13.5-mm portion is slightly

different in shape.) Do not mismount.

NOTE: Replace the Wire Roll Support [41] with new one

without fail when replacing the Motor [39].

(2) Mount the Lock Off Button [12] and Spring (B) [14] into Handle (L) [13], and then put Handle (L) [13]

and Handle (R) [5] together aligning the position of Spring (B) [14].

NOTE: When putting Handle (R) [5] and Handle (L) [13] together, completely fit the internal

wires into the grooves of the handle ribs so that the internal wires are not pinched by

the handle bodies.

NOTE: The position of the Lock Off Button [12] is predetermined. Fit the protrusion of the Lock

Off Button [12] in the recessed portion of Handle (L) [13].

[13]

[12] [14]

Fig. 7

[39]

[41]

[44]

[45]

13.5 mm

[11]

[10]

[2]

[1]

[3]

[8]

[9]

[15]

[24]

[10]

[11]

Reassembly of the Model CG 25SC

[7]

-5-

2. Checking after reassembly

(1) Check that the Lock Off Button [12] can be operated normally. Check that the trimmer does not

operate just by pulling the Trigger [8].

(2) Push the Button [32] and check that Housing (R) [29] and Housing (L) [35] can be turned 180° and

locked correctly.

(3) Check the handle portion (Pipe Ass'y [24]) can be smoothly extended and retracted, and firmly locked.

-6-

Fig. 10

Fig. 9

CAUTION: Be careful not to cut your finger with the Blade <46> located on the back of the

Protecting Cover <45>.

1. Disassembling the housing section

(1) Open the Guide <44> wide and detach it from the housing

as shown in Fig. 9.

(2) Pull up the Upper Cover <55> from the Wire Roll Support <49> while pushing in its two latches

together. Remove the Wire Roll <50> with the nylon wire and Spring (D) <54>. Next, remove the four

Screws ST4 x 12 <11>. Turn the Protecting Cover <45> in the arrow direction as shown in Fig. 10 to

remove it.

<49>

<55>

<11>

<54>

<50>

<49>

<55>

<45>

<11>

<45>

<44>

Disassembly of the Model CG 30SC

Latch (2 pcs.)

<46>

-7-

Fig. 11

(3) Remove the eight Screws ST4 x 16 <1> from Housing (R) <43> and Housing (L) <41>. Detach the

Motor <37> with the Wire Roll Support <49>, Button <34>, Lock Pin <35>, and Spring (C) <36> as

shown in Fig. 11.

(4) Remove the two Screws ST3 x 6 <32> from the Pipe Ass'y <22> to remove the Spacer <31> as shown

in Fig. 11.

2. Removing the motor

(1) Use a hex. bar wrench to turn the Cap <53>

inside the Wire Roll Support <49>. The Cap

<53> comes off together with the M5 Nut <52>.

(2) The Wire Roll Support <49> is press-fitted to the

Motor <37>. Use a large bearing puller to

remove it. For easy removal of the support, use

the two side holes of the Wire Roll Support

<49> and the end of the Motor <37> shaft. The

Wire Roll Support <49> is in contact with the

ball bearing of the Motor <37> as shown in Fig.

12.

Fig. 12

<35>

<38>

<1>

<43>

<37>

<34>

<36>

<39>

<11>

<12>

<32>

<31>

<22>

<41>

<37>

<38>

<49>

<52>

<53>

-8-

Fig. 13

3. Disassembling the handle section

(1) Remove the eight Screws ST4 x 16 <1> from Handle (R) <2> and Handle (L) <13>. Remove the

Trigger <6>, Spring (A) <5>, Spring (B) <3>, and the Lock Off Button <4> as shown in Fig. 13.

(2) Remove the two Screws ST4 x 12 <11> from each of the two Cord Clips <12> to remove the Cord

<15> from the body.

<1>

<2>

<3>

<8>

<19>

<16>

<6>

<4> <5>

<22>

<9> <10>

<17> <18>

<20>

<23>

<11> <12>

<13>

<14>

<15>

-9-

Fig. 15

Reverse the disassembly procedure to reassemble the Model CG 30SC. However, pay particular attention

to the following.

1. Notices on reassembly

(1) Press-fit the Wire Roll Support <49> to the Motor <37> until

the Wire Roll Support <49> contacts the ball bearing of the

Motor <37>.

NOTE: Do not press-fit with excessive force. Otherwise,

the Wire Roll Support <49> may be broken.

After press-fitting, put the Cap <53> on the M5 Nut <52> and

tighten it to the shaft of the Motor <37>.

NOTE: Do not press-fit with excessive force. Otherwise,

the Cap <53> may fall off.

NOTE: The wire roll support of the Model CG 30SC is

similar to that of the Model CG 25SC but they are

not interchangeable (5-mm portion is slightly

different in shape.) Do not mismount.

NOTE: Replace the Wire Roll Support <49> with new one

without fail when replacing the Motor <37>.

(2) Mount the Lock Off Button <4> and Spring (B) <3> into Handle (L) <13>, and then put Handle (L) <13>

and Handle (R) <2> together aligning the position of Spring (B) <3>.

NOTE: When putting Handle (R) <2> and Handle (L) <13> together, completely fit the internal

wires into the grooves of the handle ribs so that the internal wires are not pinched by

the handle bodies.

NOTE: The position of the Lock Off Button <4> is predetermined. Fit the protrusion of the Lock

Off Button <4> in the recessed portion of Handle (L) <13>.

Fig. 14 <37>

<38>

<49>

<52>

<53>

5 mm

Reassembly of the Model CG 30SC

<13>

<4>

<3>

<5>

<6>

<16>

<15>

<14>

<12>

<11>

<7> <22>

<20>

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