Hitachi H 60KA Manual

POWER TOOLS
TECHNICAL DATA
AND
SERVICE MANUAL
HAMMER
H 60KA
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST No. E458 Jun. 2000
H
MODEL
H 60KA

Page
CONTENTS
1. PRODUCT NAME ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
2. MARKETING OBJECTIVE •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
1
3. APPLICATIONS •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
1
4. SELLING POINTS ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
4-1. Selling Point Descriptions •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 2
5. SPECIFICATIONS •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 3
5-1. Optional Accessories •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• • 4
6. COMPARISONS WITH SIMILAR PRODUCTS ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• • 5
6-1. Specification Comparisons •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• • 5
6-2. Demolition Performance •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 5
7. PRECAUTIONS IN SALES PROMOTION •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 6
7-1. Handling Instructions •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 6
7-2. Caution Plate ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 6
7-3. Grease Replacement •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 6
7-4. O-Ring Replacement •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 6
8. REFERENCE INFORMATION ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 7
Structure: ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 7
8-1. Striking Operation ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 7
8-2. Idling-Proof Mechanism •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 8
8-3. Sealed and Dustproof Construction ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 8
8-4. Vibration Absorbing Construction ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 9
8-5. Tool Retainer (Fig. 7) •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 9
8-6. Side Handle ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 10
9. REPAIR GUIDE ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 11
9-1. Precautions and Suggestions for Disassembly and Reassembly of the Main Body •••••••••••••••••••• •• 11
9-1-2. Reassembly •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 12
10. STANDARD REPAIR TIME (UNIT) SCHEDULES •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 18
Assembly Diagram for H 60KA ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 19
Notice for use
Specifications and parts are subject to change for improvement.
Refer to Hitachi Power Tool Technical News for further information.

--- 1 ---
1. PRODUCT NAME
Hitachi Electric Hammer, Model H 60KA
2. MARKETING OBJECTIVE
As a high-end electric hammer, the Model H 60KA joins the shank-type series with the current Model H 55SA to
target the European markets. With this product series, we aim to enhance the share of the hammer market using
KANGO 21-mm accessory tools.
3. APPLICATIONS
Demolishing and chiseling of concrete
Edging, grooving, cutting, stripping, etc.
4. SELLING POINTS
Higher demolition efficiency
from stronger impact energy
Class-leading electric hammer
Easy-to-hold rubber grip
for efficient chipping
High chipping and demolishing performance
with low vibration and noise level
D-type side handle with adjustable mechanism for
360˚ rotation plus positioning from front to rear
Large trigger switch for
comfortable operation
Hitachi original design
vibration-absorbing
handle for excellent
vibration reduction

--- 2 ---
Maker •Model
HITACHI H 60KA
HITACHI H 55SA
(C)
(S)
4-1. Selling Point Descriptions
4-1-1. High chipping and demolishing performance with low vibration and sound level
The chipping performance is approx. 1.3 times higher than that of similar competitors' products, thanks to the 25J
impact energy and efficient striking. Even so, it produces low vibration and sound levels.
4-1-2. Original design vibration-absorbing handle (Vibration-absorption is significantly improved)
Hitachi's original design vibration-absorbing handle minimizes vibration through the rolling and compression of
four cylindrical rubber cushions on inclined surfaces. The spring constant factor is as low as that of the Models
H 41SA, H 45SB2, H 41SC, H 45MA, H 60MA and H 60MB and the cushioning structure greatly reduces
vibration.
4-1-3. D-type side handle with 360˚ rotation adjustable mechanism plus operation from front to rear
The D-type side handle can be adjusted over 360˚ rotation and also allows convenient positioning from front to
rear. This side handle has a two-layer plastic construction (integral molding) made of nylon resin as the base and
soft resin covering for a comfortable cushion grip.
4-1-4. Easy-to-handle rubber grip for efficient wall chipping
The rubber grip around the tool retainer allows secure gripping without slipping and easy positioning of the tool for
efficient wall chipping.
(C) & (S) spec. is shown only for your reference, not for comparison.
Vibration level
(m/s2)
12.0
20.5
(12.0)
(14.0)
Ratio of demolished
weight (%)
100
80
(75)
(77)
Sound level
(dB(A))
97
105
(105)
(108)
Fig. 1
Rubber grip

--- 3 ---
5. SPECIFICATIONS
H 60KA
Power source
Voltage (V)
Motor type
Insulation structure
Enclosure
Switch
Type of handles
Full-load current
Power input
Striking speed
Weight
Packaging
Standard accessories
Single-phase AC 50/60 Hz
110, 115, 230, 240
AC single-phase series commutator motor
Double insulation
Materials: Aluminum alloy die casting
Nylon resin (Handle and tail cover)
Paint: Silver green metallic, black
Trigger switch (with stopper)
D-shaped handle and side handle
12.4 A (110 V), 11.9 A (115 V), 6.0 A (230 V), 5.7 A (240 V)
1,300 W
1,970 /min.
1,600 /min.
Product: 11.0 kg (24.3 lbs.); excluding cord
Packed: 18.5 kg (40.8 lbs.)
Corrugated cardboard box with steel tool case
Bull point 300 mm (11-13/16") ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Hex. bar wrench (for M8) •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Dust cover ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Steel tool case •••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Side handle ••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••••• 1
Item
No-load
Full-load

--- 4 ---
Code No.
986952
986953
986954
+
+
+
5-1. Optional Accessories
1. Demolition work
(1) Bull point
2. Grooving and chiseling work
(1) Cold chisel
3. Cutting and stripping work (asphalt cutting, etc.)
(1) Cutter
Overall length
300 mm (11-13/16")
380 mm (14-31/32")
450 mm (17-23/32")
Overall length
380 mm (14-31/32")
450 mm (17-23/32")
Code No.
986948
986949
4. Grease for impact drill
(Note)
Code numbers listed above are subject to change. Please refer to periodic Technical News Bulletins.
Code No.
986950
986951
Overall length
400 mm (15-3/4")
400 mm (15-3/4")
Width
50 mm (2")
75 mm (2-61/64")
500 g (1.1 lbs.) Can 30 g (1 oz) Tube
70 g (2.5 oz) Tube Code No. 981840
Code No. 308471Code No. 980927

--- 5 ---
(470)
(18-1/2")
W
/min.
mm
mm
mm
6. COMPARISONS WITH SIMILAR PRODUCTS
6-1. Specification Comparisons
Maker
Model name
Power input
Full-load impact rate
Dimensions
Striking energy per stroke
Insulation structure
No-load noise level
Sound power level
Vibration level
Weight (without cord)
HITACHI
Length
Height
Width
(C)
H 60KA
1,300
1,600
576
(22-43/64")
280
(11-1/32")
121
(4-51/64")
25.0
Double
insulation
85
97
12.0
11.0 kg
(24.3 Ibs.)
H 55SA
1,140
1,450
563
(22-5/32")
281
(11-1/16")
110
(4-21/64")
16.0
Double
insulation
86
105
20.5
9.5 kg
(20.9 Ibs.)
(940)
(2,000)
(14.2)
Double
insulation
(105)
(12.0)
(9.1 kg)
(20.1 Ibs.)
--- (
(1,050)
(2,000)
(675)
(26-9/16")
(186)
(7-21/64")
(16.4)
Double
insulation
(108)
14.0
(10.0 kg)
(22.0 Ibs.)
(S)
6-2. Demolition Performance
The data shown in Fig. 2 are obtained in actual factory tests, and are for reference only. Demolished amount may
vary in accordance with operating conditions, operator skill, etc.
(C) & (S) spec. is shown only for your reference, not for comparison.
Fig. 2
--- ---
At rated
voltage
Demolished weight for 30 min. (kg)
75 100 125 150 175 Demolished amount
(kg/30 min.)
H 60KA
H 55SA
(B)
(C)
135
108
(101)
(104)
kg
dB(A)
dB(A)
m/s
2
---
J
---
( --- ) ---
( --- )
(250)
(9-27/32")

--- 6 ---
7. PRECAUTIONS IN SALES PROMOTION
In the interest of promoting the safest and most efficient use of the Model H 60KAElectric Hammer by all of our
customers, it is very important that at the time of sale the salesperson carefully ensures that the buyer seriously
recognizes the importance of the contents of the Handling Instructions, and fully understands the meaning of the
precautions listed on the Caution Plate attached to each tool.
7-1. Handling Instructions
Although every effort is made in each step of design, manufacture and inspection to provide protection against
safety hazards, the dangers inherent in the use of any electric tool cannot be completely eliminated. Accordingly,
general precautions and suggestions for the use of electric power tools, and specific precautions and suggestions
for the use of the Electric Hammer are listed in the Handling Instructions to enhance the safe, efficient use of the
tool by the customer. Salespersons must be thoroughly familiar with the contents of the Handling Instructions to
be able to offer appropriate guidance to the customer during sales promotion.
7-2. Caution Plate
The Model H 60KA unit is provided with a Caution Plate (illustrated below) which lists basic safety precautions in
use. Carefully ensure that the customer fully understands and follows these precautions before using the tool.
CAUTION
Read thoroughly HANDLING INSTRUCTIONS
before use.
Hitachi Koki
For Australia
7-3. Grease Replacement
The striking portion and the speed reduction portion of the Model H 60KA respectively use different types of
grease. Grease replacement is required if the unit is disassembled for maintenance or O-rings become damaged
or worn as described in 7-4.
The striking portion uses special grease. If the striking portion (inside the cylinder case and crank case) is
disassembled, thoroughly remove all of the old grease from each part. On reassembly, insert 60 g (2.1 oz) of new
grease into the crank case (connecting rod side). Do not exceed the designated amount of grease. Excessive
grease insertion may cause reduced striking performance.
The speed reduction portion (inside the gear cover) uses Hitachi Motor Grease No. 29 (Code No. 930035). The
proper supply volume is 40 g (1.4 oz). Never use the striking portion special grease in the speed reduction
portion. Special grease would leak into the motor portion and cause subsequent trouble.
7-4. O-Ring Replacement
The O-rings (mounted on the striker and piston) are extremely important to ensure adequate sealing of the air
pressure. Although the O-rings are made of special rubber to give them a long service life, they do nonetheless
become worn, and should be replaced by new ones periodically depending on frequency of use of the tool. With
average use, it is recommended that the O-rings be replaced at least every six months to ensure maximum
effectiveness.

--- 7 ---
8. REFERENCE INFORMATION
Structure:
Fig. 3
8-1. Striking Operation
The rotation of the armature is transferred to the crank shaft and connecting rod, which in turn cause the piston to
reciprocate inside the cylinder. As the piston reciprocates, the changing air pressure inside the air chamber
between the piston and the striker causes the striker to continuously strike against the end of the second hammer.
At the same time, the air-cushion effect within the air chamber absorbs the impact of the second hammer. Should
the air escape from the air chamber, the air-cushion effect would cease, and the impact energy would not be
absorbed. Accordingly, the O-rings mounted on the striker and piston play an extremely important role in sealing
the air within the air chamber.
Second hammer
Crank cover
Cylinder Air chamber
Connecting rod
Piston
O-rings
Striker
Armature
Crank shaft

--- 8 ---
8-2. Idling-Proof Mechanism
When the bull point is released from the concrete surface, the second hammer moves to the position illustrated in
Fig. 4, and the striker moves out of striking position. When this occurs, the air holes are opened and the pressure
within the air chamber remains unchanged even though the piston continues to reciprocate, thereby preventing
striking operation. Second hammer Striker
Air
chamber
Air hole
Crank case
Vibration
absorbing
unit
Housing
O-ring
Forward movement of
second hammer & striker
Front cover ass'y Cylinder case
Fig. 5
Vibration absorbing unit
Switch handle
O-ring
Oil
seal
8-3. Sealed and Dustproof Construction
The crank case and cylinder case are sealed by four O-rings, and an oil seal which serve to prevent leakage of
the grease, as well as to prevent dust and dirt from entering the mechanism.
Fig. 4
O-ring
O-ring

--- 9 ---
8-4. Vibration Absorbing Construction
8-5. Tool Retainer (Fig. 7)
Installing dust cover
Always install the dust cover in the tool.
Insert the dust cover until it lies flush in the groove.
Installing tool
(1) Clean, then smear the tool shank with the grease
provided.
(2) Slide the stop lever in the direction of arrow
and rotate it 180˚. Turn the notch of the tool
shank downward and insert it fully into the
hexagonal hole of the front cover ass'y.
(3) Turn the stop lever and align the front cover mark
with the stop lever mark to secure. Fig. 7
Hitachi original, innovative units which absorb vibration are installed between the switch handle and the crank
case and between the switch handle and the housing. As a result, the amount of vibration transmitted from the
main body to the arms of the operator is considerably less in comparison with conventional hammers.
Construction of vibration absorbing unit:
The main body (crank case and housing)
and the handle are connected through
four cylindrical rubbers (handle dampers).
Vibration is absorbed by the rolling and
compression of the four rubbers on
inclined surfaces. Because the vibration
absorbing unit has non-linear spring
characteristics, its spring constant factor
is lower than that of the conventional
shearing rubber type vibration-absorbing
construction, and it provides significantly
higher efficiency in minimizing vibration.
In addition, the interlocking slotted groove
and cylindrical convex portions at the
center prevent the handle from being
disconnected by twisting or pulling, a
common problem with conventional
hammers. Fig. 6
Cyindrical rubbers (handle damper: 4 pcs.)
Handle damper retaining material
(Crank case and housing)
Cylindrical
convex
Handle damper
retaining material
(handle side)
Slotted groove
Main body side
Vibration-
proof rubbers Handle side
Pressing
force of the
main body
Rolled and compressed
Reaction
Stop lever
Dust cover
Front cover
Tool shank
(b) At full-load
(a) At no-load
A
A

--- 10 ---
8-6. Side Handle
The side handle can be adjusted by 360˚rotation and
also allows operation from front to rear. Loosen the
handle by turning the grip in direction and adjust
the handle to a convenient position. Turn the grip in
direction to fix the side handle (Fig. 8).
Fig. 8
Grip
BA
B
A

--- 11 ---
9. REPAIR GUIDE
9-1. Precautions and Suggestions for Disassembly and Reassembly of the Main Body
The numbers in [Bold] correspond to the item numbers in the Parts List and exploded assembly diagrams.
9-1-1. Disassembly
Piston and striker disassembly
Remove the Hex. Socket Hd. Bolt (W/Flange) M8 x 35 [20] fixing the Cylinder Case [19], and disassemble the
Cylinder Case [19] from the Crank Case [28]. As the Piston [25] remains in the Crank Case [28] side, remove
the Retaining Ring for D14 Shaft [27] to remove the Connecting Rod [26] from the Crank Shaft [33].
The Striker [22] can be removed by tapping the Cylinder Case [19] lightly with a plastic hammer. If it does not
come out easily, push the disassembled Piston [25] with the Connecting Rod [26] back into the Cylinder, and
pull them apart again quickly. The Striker can come out at the same time.
First gear and crank shaft disassembly
Remove the grease from the Connecting Rod [26] side and the First Gear [44] side of the Crank Case [28].
Remove the two Seal Lock Hex. Socket Hd. Bolts M5 x 14 [35] fixing the Bearing Cover [36]. Then place the
Connecting Rod [26] side of the Crank Case [28] downward on a workbench and apply pressure on the end
surface of the Crank Shaft [33] with a hand press to remove the First Gear [44] and the Crank Shaft [33]
(Fig. 9). Before removing them, make sure that the two Seal Lock Hex. Socket Hd. Bolts M5 x 14 [35] fixing the
Bearing Cover [36] are removed.
Fig. 9
First gear
Apply pressure on the end
surface of the crank shaft
with a hand press.
Workbench
Bearing cover
Crank case
Crank shaft

--- 12 ---
Stop lever disassembly
Pull the Stop Lever [3] in the direction of the arrow, rotate it a little and slide the end surface of the stop lever
over the flange end surface of the Front Cover Ass'y [9]. Rotate the spring case so that the hole of the Spring
Case [4] is adjusted to the position of the Needle Roller D4 x 20 [5] and remove the needle roller. Then, the
Stop Lever [3], Stopper Sleeve [7] and the Stopper Spring [6] can be taken off.
Stopper sleeve
Slide the end surface of the stop lever over the flange of the front cover ass'y
Stop lever
Push the stopper sleeve
with a flat-blade screwdriver.
9-1-2. Reassembly
Reassembly can be accomplished by following the disassembly procedure in reverse.
However, special attention should be given to the following items.
First gear and crank shaft reassembly
Press-fit the Ball Bearing [37] in the Crank Case [28] and fix the Bearing Cover [36] with the two Seal Lock
Hex. Socket Hd. Bolts M5 x 14 [35]. Press-fit the Crank Shaft [33]. Then press-fit Distance Ring (C) [39] and
mount the Oil Seal [38]. Put the Feather Key 3 x 3 x 10 [34] into the groove of the Crank Shaft [33] and press-
fit the First Gear [44] with a suitable tool while holding the flat portion of the Crank Shaft [33] with a steel bar.
Before press-fitting, make sure that the Feather Key 3 x 3 x 10 [34] fits in the key groove of the First Gear [44]
(Fig. 11).
Fig. 10
Fig. 11
Stopper spring Flange of
front cover ass'y
Needle roller
Spring case
3 mm dia. hole Front cover ass'y
Bar steel of less
than 3 mm dia.
G
Feather key
Suitable tool
Distance ring (C)
Crank case
First gear
Oil seal
Bearing cover
Ball bearing
Crank shaft
Steel bar
Seal lock hex.
socket hd. bolt M5

--- 13 ---
Lubrication
Apply special grease (grease for electric impact drills) to the inner circumference of the Connecting Rod [26],
O-Rings (A) [23] in the Striker [22] and in the Piston [25], the sliding portion of the Second Hammer [14], the
Oil Seal [38], the Damper [16], Damper (B) [12], the Damper Washer [17]. Seal 60 g of the special grease into
the Crank Case [28] (Connecting Rod [26] side). Apply Hitachi Motor Grease No. 29 to Needle Bearing (A)
[45], the pinion portion of the Armature Ass'y [55]. Seal 40 g of the Hitachi Motor Grease No. 29 into the Crank
Case [28] (First Gear [44] side).
Oil seals
Be very careful not to damage the O-Ring [32] in the Crank Cover [31], O-Rings (A) [23] in the Striker [22] and
in the Piston [25], the Oil Seal [38] in the Crank Case [28], the O-Ring [21] on the Cylinder Case [19], the
O-Ring [18] on the Front Cover Ass'y [9], the O-Ring [11] in the Front Cover Ass'y [9].
Retainer reassembly
Apply Mollub alloy K#777-1 lubricant to the sliding part of the Stop Lever [3] before assembling. As shown in
Fig. 12, mount the stop lever end surface on the flange of the Front Cover Ass'y [9] and push the Stopper
Sleeve [7] with a flat-blade screwdriver to contract the Stopper Spring [6]. Adjust the holes of the stop lever
and Spring Case [4], and insert the Needle Roller D4 x 20 [5].
Needle roller
Fig. 12
Stop lever
Front cover ass'y
Spring case
Stopper sleeve
Stopper spring

--- 14 ---
9-1-4. Tightening torque
(1) Hex. socket hd. bolts M5 7.84 N•m (80 kgf•cm, 69.4 in-Ibs.)
(2) Attached bolts of handle 4.94 N•m (50 kgf•cm, 43.4 in-Ibs.)
(Hex. socket hd. bolts M5 x 12)
(3) Hex. socket hd. bolts M6 9.80 N•m (100 kgf•cm, 86.8 in-Ibs.)
(4) Tapping screws D4 19.6 0.49 N•m (20 5 kgf•cm, 17.4 4.3 in-Ibs.)
(5) Tapping screws D5 2.94 0.49 N•m (30 5 kgf•cm, 26.0 4.3 in-Ibs.)
(6) Attached bolts of front cover ass'y 39.2 0.98 N•m (400 10 kgf•cm, 347.2 8.7 in-Ibs.)
(Hex. socket hd. bolts M8 x 25)
(7) Attached bolts of cylinder case 19.6 N•m (200 kgf•cm, 173.6 in-Ibs.)
(Hex. socket hd. bolts (W/flange) M8 x 35)
9-1-5. Internal wiring
Wiring diagram
(1) For products with nosie suppressor
9-1-3. Screw locking agent TB1401
Apply screw locking agent TB1401 to all hex. socket hd. bolts M5 and M6. (As the hex. socket hd. bolts for M8
that secure the front cover ass'y and the hex. socket hd. bolts (w/flange) for M8 that secure the cylinder case are
special bolts, they cannot be re-used if removed. Use fresh service parts only.)
SW
Stator Connector
Brown
Plug
Blue
Noise
suppressor
Pillar terminal
Stator
Armature
Connector
Fig. 13
Caution: If bolts are loosened by vibration, it could cause damage to the hammer body. Ensure without
fail that screw locking agent is applied to threaded portions prior to reassembly.
0
+1.96 +20
0 0
+17.4
0
+1.96
0
+1.96
+20
0
+20
0
0
+17.4
0
+1.96 +20
0 0
+17.4
0
+17.4

--- 15 ---
(2) For products without noise suppressor
SW
Stator
Black
Plug
White
Connector
Stator
Armature
Fig. 14
A

--- 16 ---
Switch
Connector
Noise
suppressor
Internal wire
holder
Internal wire
holder Noise suppressor
internal wire
Stator internal wire
Internal wire holder
Schematic diagram
Housing ass'y
Fig. 15
Connector
Noise
suppressor Cord
Switch
Handle (A)
Pillar
terminal
Internal wire

--- 17 ---
9-1-6. Insulation tests
On completion of disassembly and repair, measure the insulation resistance and dielectric strength.
Insulation resistance: 7 MΩor more with DC 500 V Megohm Tester
Dielectric strength: AC 4000 V/1 minute, with no abnormalities ••• 220 V --- 240 V
(and 110 V for U.K. products)
AC 2500 V/1 minute, with no abnormalities ••• 110 V --- 127 V
(except U.K. products)
9-1-7. No-load current value
After no-load operation for 30 minutes, the no-load current value should be as follows:
Voltage (V)
Current (A) (Max.)
110 220 230 240
7.5 7.2 3.6 3.5

--- 18 ---
10. STANDARD REPAIR TIME (UNIT) SCHEDULES
MODEL 10 20 30 40
Fixed Variable
H 60KA Work Flow
Front Cover
Ass'y
Sleeve
O-ring (S-26)
Damper (B)
Second
Hammer
Hammer
Holder (B)
Damper
DamperWasher
O-ring (S-56)
60 min.
50
Gear Cover
Needle Bearing
Armature Ass'y
Ball Bearing
(6201VV)
Ball Bearing
(608VV)
Washer (A)
Washer (B)
Switch (B)
Cord
General Assembly
Stop Lever
Ass'y
Stop Lever
Spring Case
Needle Roller
Stopper Spring
Stopper Sleeve
Cylinder Case
Housing Ass'y
Stator Ass'y
Handle (A)
Handle (B)
Transatory Unit
Crank Shaft
Feather Key
(4 x 4 x 10)
Ball Bearing
(6203DD)
O-ring (S-40)
Oil Seal
First Gear
Crank Case
Striker
O-ring x 2
Piston Pin
ConnectingRod