HITACHI G 13SE, G 12SE User guide

MODELS G 12SE/G 13SE

1. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY

Describes procedures and precautions for disassembly and reassembly. The
the numbers in the G 13SE or G 12SE Parts List.

1-1. Disassembly of the Armature Ass’y

(1) Open the Lever

[37]

.

(2) Loosen the two D4 x 35L Tapping Screws

Tail Covers A and B
(3) Remove the two Carbon Brushes
(4) Remove the four D5 x 25 Tapping Screws

The Armature Ass’y

Packing Gland
(5) Remove the four M5 x 16L Seal Lock Screws
(6) After removing the three M4 x 10 Seal Lock Screws

with the Bearing Cover
(7) Carefully wrap the Armature Ass’y

clamp it securely in a vise. Then, remove the M7 Special Nut

[33]

, loosen the M5 x 25 Machine Screw

[50]

[58] [49]

[13]

[27]

, and related parts.

.

[54]

from the Brush Holders

[2]

.

can then be taken out simultaneously with the Gear Cover Ass’y

[12]

, and related parts.

[13]

with a soft, clean rag to protect it from being damaged, and

and the D4 x 20L Tapping Screw

[28]

.

[34]

, and remove the Wheel Guard Ass’y

[55]

[1]

, the Armature

[5]

.

, and extract the Pinion

bold

numerals in

[53]

[13]

can be extracted together

[ ]

, and remove

[4]

[6]

denote

.

.

(8) For the models indicated under Fig. 4, the Ball Bearing

by utilizing a J-204 Bearing Puller (special repair t ool, Code No. 970982) as illustrated. After the Ball

Bearing has been removed, the Bearing Cover

[12]

[9]

can be removed from the Armature

can be easily taken off.

Bearing Puller (Code No. 970982)

[13]

Fig. 4

−

−#

1

1-2. Disassembly of the Stator Ass’y:

(1) After removing the Armature Ass’y

the Brush Holders

[55]

.

and Switch Box

[13]

(2) Loosen the two D4 x 70L Hex. Hd. Tapping Screws

Housing

can be facilitated by heating the Housing

. If the Stator Ass’y

[43]

cannot be easily removed from the Housing

[16]

[43]

an appropriate heating device.

1-3. Disassembly of the Gear:

(1) Loosen the four M5 x 16L Seal Lock Screws

the Spindle
(2) When it is necessary to remove the Gear

, and Gear

[30]

from the Gear Cover Ass’y

[21]

[21]

the special repair tools described below be utilized.

Push

J-129-2
Gear Puller

J-130
Sleeve

, disconnect the lead wires connected to

[46]

and remove the Stator Ass’y

[15]

[43]

from the

[16]

, disassembly

to a temperature of approximately 60°C (140°F) with

, and remove the Packing Gland

[28]

in a single body.

[4]

from the Spindle

, it is highly recommended that

[30]

together with

[27]

As illustrated in Fig. 5, support the angled surface
of the Gear

with a J-129-2 Gear Puller

[21]

(special repair tool, Code No. 970906), rest the
J-129-2 Gear Puller on a J-130 Sleeve (special
repair tool, Code No. 970907), and push down on
the tip of the Spindle
remove the Gear

[21]

with a hand press to

[30]

.

Fig. 5

1-4. Reassembly:

Reassembly can be accomplished by following the disassembly procedures in reverse. However,
special attention should be given to the following items.
(1) After disassembly, thoroughly remove old grease from the inside of the Gear Cover Ass’y

[4]

insert 18 g of new grease (Nippeco JF-375, Code No. 930036, is recommended) prior to

reassembly. When inserting grease, apply it to the Pinion Gear tooth surfaces, and to the Needle

Bearing inside the Gear Cover.
(2) When replacing the Ball Bearing on the commutator side of the Armature, be very careful to ensure

that the Dust Seal (A)

is assembled in the proper direction. The Dust Seal (A)

[18]

[18]

plays an
important role in dustproofing of the Ball Bearing, and must be replaced with a new one if
disassembled. Do not forget to insert the Thrust Washer
(A)

[18]

.

on the Armature side of the Dust Seal

[17]

(3) Apply Three Bond TB 1406 Screw Locking Agent to the following screws.

, and

Three M4 x 10 Seal Lock Screws
Three M4 x 8 Seal Lock Screws
Four M5 x 16 Seal Lock Screws

which fix Bearing Cover

[1]

which fix Bearing Cover (B)

[22]

which fix Packing Gland

[28]

−#2 −

[12]

[27]

in place.

in place.

[23]

in place.