Kango 845K Installation and operating manual

9800 0336 01 a
845K
GB
Date Code
0001L2001

Service and Repair Manual
Model 845K 2
WARRANTY AND LIABILITY STATEMENT
All repairs may be completed with standard workshop tools and equipment.
SERVICE TOOLS
Use only Authorized parts. Any dama e or malfunction caused by the use of unauthorized parts
is not covered by Warranty or Product Liability.
General
For best performance hammers should be serviced at regular intervals, any indication that the hammer is not performing as specified
should be investigated to prevent any adverse damage occuring.
ALL SEALS, GASKETS, G EASE O OTHE PA TS DEEMED NECESSA Y FO SE VICING A E IN THE SE VICE KIT.
ALL NEEDLE OLLE BEA INGS SHOULD BE P ESSED WITH THE OUNDED EDGE ENTE ING THE BO E FI ST, AND THE P ESS TOOL
P ESSING AGAINST THE FLAT SU FACE OF THE BEA ING.
Cleanin
All mechanical parts with the exception of any sealed bearings should be cleaned in a suitable cleaning fluid. Electrical parts should be
cleaned by the use of compressed air. P ECAUTIONS MUST BE TAKEN FO PE SONAL SAFETY THE USE OF EYE P OTECTION AND
GLOVES IS ECOMMENDED.
Inspection
All mechanical and electric parts should be inspected for wear and replaced as required.

3
Service and Repair Manual
Model 845K
%SEE PAGE 5 FOR
ADDITIONAL LUBRICATION
AND SERVICE NOTES
l
EXAMPLE:
Component Parts (Small #) Are Included
When Ordering The Assembly (Large #).
0
00
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
2 9170 4667 30 5 mm Steel Ball (2)
4 9170 3251 20 Ball Bearing (1)
7 9170 3251 60 Ball Bearing (1)
13 9170 3253 10 Pivot Nut (1)
15 9170 3252 90 Pivot Bolt (1)
16 9170 3251 00 M6 x 1.0 x 120 Pan Hd. Slt. Tapt. T-27 (4)
19 9170 3253 90 Special Screw (2)
20 9170 3250 10 8-32 x 3/8" Pan Hd. Slt. Tapt. T-20 (4)
21 9170 3251 90 8-16 x 2" Pan Hd. Slt. Plast. T-20 (2)
24 9170 3252 50 M5 x 2.24 x 18 Pan Hd. Slt. PT T-20 (7)
25 9170 4650 10 Dowel Pin-Knurled (1)
26 9170 3237 30 ound Label (1)
31 9170 4668 90 230 V Electronics Assembly (1)
32 9170 4669 00 230 Volt Armature (1)
33 9170 4670 30 230 Volt Field (1)
34 9170 4669 10 Carbon Brush (2)
36 9170 3252 00 Brush Carrier Assembly (1)
39 9170 4669 20 Blade Housing Assembly (1)
40 9170 4671 90 Quik-Lok Cord Set (1)
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
41 9170 3252 10 Brush Spring (2)
42 9170 4652 10 Speed Control Switch (1)
47 9170 3254 10 Upper Handle Mount (1)
50 9170 4652 30 Motor Cover (1)
51 9170 4669 40 Left Handle Half (1)
52 9170 4669 50 ight Handle Half (1)
53 9170 3251 70 Motor Housing (1)
54 9170 3252 30 Left Shroud (1)
55 9170 3252 40 ight Shroud (1)
56 9170 4659 90 Belly Shroud (1)
59 9170 3251 50 etaining ing (1)
62 9170 3250 80 O- ing (1)
76 9170 3250 70 etaining ing (1)
77 9170 3250 50 Torsion Spring (1)
79 9170 3250 30 Compression Spring (2)
80 9170 3251 10 Bearing Cup (1)
82 9170 4660 20 Shift Disk (1)
87 9170 3254 20 Isolation Bellows (1)
88 9170 3253 00 Pivot Isolator (2)
89 9170 3254 30 Isolation Module Assembly (1)
90 9170 3250 20 otostop Knob (1)
92 9170 3253 30 Foam Slug Kit (Bag of 10) (1)
93 9170 3252 60 Handle Cushion (1)
110 9170 3254 00 ubber Washer (2)
114 9170 4660 90 Fan (1)
l

Service and Repair Manual
Model 845K 4
Assemble Thrust Washers
#107 and Belleville Spring
Washers #78 into Intermediate
Housing #46 as illustrated.
NOTE: USE OIL
ON ALL AREAS
TO BE PRESS FIT
%SEE PAGE 5
FOR ADDITIONAL
LUBRICATION
AND SERVICE NOTES
_______________________________________________________________
______________________________________________________________
________________________________________________________________
_______________________________________________________________
______________________________________________________________
______________________________________________________________
________________________________________________________________
___________________________________________
________________________________________
___________________________________________
FASTENER TORQUE SPECIFICATIONS (IN./LBS.)
SEATING TORQUE
FIG. NO. MINIMUM MAXIMUM
14 120 140
15 20 25
16 30 35
19 30 35
20 25 30
21 20 25
22 25 30
25 30
20 25
610
105 60 70
HANDLE HALVES
AND SHROUDS
CUSHION GRIP
CRANKCASE COVER
23
24 9170 4671 60
Service Carryin Case
9170 4667 00 CARBON BRUSH SERVICE KIT
THIS KIT CONTAINS:
2 --------------- Carbon Brush
l9170 4666 70 HAMMER SERVICE KIT
THIS KIT CONTAINS:
1 9170 3254 50 Cap-Cover
1 9170 3261 00 ubber Damping Washer
1 9170 3255 00 Seal-Cover
1 9170 3255 50 O- ing
1 9170 4662 90 Cap Seal
1 9170 4664 40 O- ing
1 9170 4665 50 O- ing
1 9170 3251 10 Bearing Cup
1 9170 3261 40 Gasket
1 9170 4671 20 Dust Seal
1 9170 4664 70 7 Oz. Tube "S2" Grease
2 9170 4669 10 Carbon Brush

5
Service and Repair Manual
Model 845K
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
1 9170 3256 50 1/8" Steel Ball (12)
3 9170 4661 10 1/4" Steel Ball (1)
5 9170 3254 90 Ball Bearing (1)
6 9170 3256 20 Ball Bearing (1)
8 9170 3257 20 Ball Bearing (1)
9 9170 3255 70 Needle Bearing (3)
10 9170 3255 20 Needle Bearing (1)
11 9170 3260 00 Needle Bearing (1)
12 9170 3260 30 Needle Bearing (1)
14 9170 4661 90 M6 x 1.0 x 70 Skt. Hd. Cap Screw T-27(4)
17 9170 4670 70 Cross Pin (1)
18 9170 3258 10 Dowel Pin (1)
22 9170 3254 60 8-32 x 3/8" Pan Hd. Slt. Taptite T-20 (1)
23 9170 3254 70 M4 x 0.7 x 14 Pan Hd. Slt. Taptite T-20 (4)
28 9170 3257 80 External etaining ing (1)
43 9170 3255 90 Bearing etainer (1)
44 9170 4662 10 Crankcase (1)
45 9170 3254 40 Crankcase Cover (1)
46 9170 4662 30 Intermediate Housing (1)
48 9170 4670 90 Nose Assembly (1)
49 9170 3254 50 Cap-Cover (1)
57 9170 3257 30 Bevel Gear (1)
58 9170 4662 90 Cap Seal (1)
60 9170 4664 40 O- ing (1)
61 9170 3255 80 O- ing (1)
63 9170 3261 00 ubber Damping Washer (1)
64 9170 3255 00 Seal-Cover (1)
65 9170 4664 60 O- ing (1)
66 9170 3255 50 O- ing (1)
67 9170 4665 50 O- ing (1)
68 9170 3257 40 etaining ing (1)
69 9170 3254 80 etaining ing-Beveled (1)
70 9170 4665 70 Clutch Shaft (1)
71 9170 3257 10 Hollow Clutch Shaft (1)
72 9170 3255 60 Crankshaft Assembly (1)
73 9170 4669 80 Spindle (1)
74 9170 4666 80 Bit Lock Spring (1)
75 9170 3256 80 Compression Spring (1)
78 9170 3260 20 Belleville Spring (2)
81 9170 4667 40 Barrel (1)
83 9170 3256 90 Spring Flange (1)
84 9170 3261 40 Gasket (1)
91 9170 4671 10 Bit Lock (1)
94 9170 4661 60 Wrist Pin (1)
95 9170 4667 60 Piston (1)
96 9170 3256 70 Splined Clutch Plate (1)
97 9170 3256 60 Fixed Clutch Plate (1)
98 9170 4667 70 am (1)
99 9170 3256 40 Shift ing (1)
100 9170 3255 10 Connecting od Assembly (1)
101 9170 4671 20 Dust Seal-Hex (1)
102 9170 4671 30 Oil Seal (1)
104 9170 4668 00 Striker (1)
105 9170 4668 10 DG50 x 16mm Torx Pan Head Screw (4)
106 9170 4671 80 Felt Seal (2)
107 9170 3260 10 Thrust Washer (2)
108 9170 3261 10 Barrel Thrust Washer (1)
109 9170 3260 90 Striker Cushion Washer (1)
113 9170 3257 90 Wave Washer (1)
115 9170 4651 60 Hex Head Bolt-Special (1)
116 9170 3258 80 Side Handle Band (1)
117 9170 3257 70 Side Handle Assembly (1)
118 9170 4666 30 Depth od Mount Assembly (1)
119 9170 3257 60 Depth Gauge od (1)
120 9170 3258 20 Band etainer (1)
121 9170 3258 00 Side Handle Housing (1)
NOTE: Check the clutch torque. Clutch must slip at 35 to 45 ft.lbs.
at the spindle, checked clockwise as viewed from the
front of the tool.
l
l
l
l
l
l
l
l
l
LUBRICATION NOTES: (TYPE "S2" GREASE, NO. 9170 4 4 70)
Fill Piston #95 with grease and
assemble to Connecting od #100
with Wrist Pin #94. Front surface
of Piston to be free of grease.
Lubricate O- ing #67
with grease.
Place 1.5 oz. grease here.
Place a total of 1.0 oz. grease
in the barrel cavity in the crankcase #44.
Place .5 oz. in each corner in barrel
chamber.
Apply grease to
spline surface #71.
Apply grease
to lobed
surface #97. Apply grease to
lobed surface #96.
Apply grease to
radius and spline
surface #70.
Apply .5 oz. grease on clutch
assembly, filling the spring coils.
Lightly grease
Spring #74 and
bit lock #91.
Place .5 oz. grease in
lower clutch pinion cavity.
Seal to be installed with
garter spring to left as shown.
F ONT OF C ANKCASE
Place
1.5 oz.
grease in bottom
of crankcase prior to
installing crankshaft
assembly.
Dip Felt Washers #106 into light oil.
Press Oil Seal #102 and Felt Washers
into Nose #48 to dimension shown.
1.5+/-.015
Lubricate O- ing with grease.
Install O- ing onto am.
Assemble Cap Seal onto am.
esize Cap Seal and load into
Barrel (seal end first). am
should be located flush with
end of Barrel.

Service and Repair Manual
Model 845K 6
FIG. %NOTES
54,55,56 TO EMOVE BELLY SH OUD #56 F OM TOOL, INSE T SMALL
SC EW D IVE INTO G OOVE BETWEEN BELLY AND SIDE
SH OUDS #54 AND #55, ABOUT 1/3 OF THE WAY F OM THE
MOTO END, AS SHOWN. P Y OUT AND DOWN ON BOTH SIDES
OF THE TOOL.
54,55 TO INSTALL THE SIDE SH OUDS #54 AND #55, THE TOP HINGE OF
THE SH OUDS MUST BE COMPLETELY INTE LOCKED, THEN THE
BACK SIDE OTATED CLOSED A OUND THE TOOL.
73 LUB ICATE ALL BO ES IN SPINDLE #73 WITH A MEDIUM COATING
OF G EASE.
63,108,109 LUB ICATE UBBE DAMPING WASHE #63, BA EL TH UST
WASHE #108 AND ST IKE CUSHION WASHE #109 WITH A
MEDIUM COATING OF G EASE BEFO E ASSEMBLY.
10, 100 P ESS NEEDLE BEA ING #10 IN OD #100 SO THAT THE SAME
AMOUNT STICKS OUT ON BOTH SIDES OF THE OD, AS SHOWN.
9,71 P ESS (2) NEEDLE BEA INGS #9 INTO HOLLOW CLUTCH SHAFT
#71, FLUSH WITH THE ENDS OF THE SHAFT.
11,12,46 P ESS NEEDLE BEA INGS #11 AND #12 FLUSH TO THE MACHINED
FACES ON BOTH ENDS OF THE INTE MEDIATE HOUSING #46.
9,44 P ESS NEEDLE BEA ING #9 INTO C ANKCASE #44, FLUSH WITH
TOP OF BO E, AS SHOWN.
81 LIGHTLY G EASE INSIDE OF BA EL #81 BEFO E ASSEMBLY.
48,73 SMALL OUTSIDE DIAMETE OF SPINDLE #73 IS TO BE LUB ICATED
WITH A LIGHT COAT OF G EASE BEFO E ASSEMBLING THE NOSE
ASSEMBLY #48 TO THE TOOL.
48,73,102 NOSE ASSEMBLY #48 MUST BE PLACED SQUA ELY OVE SPINDLE
#73, WHEN ASSEMBLING, TO P EVENT DAMAGE TO OIL SEAL
#102.
14,19,20,23 FASTENE S #14, #19, #20 AND #23 A E TO BE E-ASSEMBLED
USING BLUE LOCTITE.
48,102 LUB ICATE BO E IN NOSE ASSEMBLY #48 BEFO E P ESSING OIL
SEAL #102 INTO PLACE.
60,61,62, LUB ICATE O- INGS #60, #61, #62, #66 AND #67 WITH G EASE.
66,67
69 INSTALL BEVEL SNAP ING #69 WITH BEVEL SIDE UP.
4,50,80 PLACE BEA ING CUP #80 ON SMALL A MATU E BEA ING #4
BEFO E INSTALLING MOTO COVE #50.
41 B USH SP INGS #41 A E TO BE WOUND 1/2 TU N TO ENGAGE
B USHES.
4 UBBE SEAL SIDE OF BALL BEA ING #4 TO FACE FAN.
95,98 FACES OF PISTON #95 AND AM #98 A E TO BE F EE OF
G EASE.
105 WHEN EASSEMBLING BA EL AND CLUTCH SC EWS INTO EXIST-
ING C ANKCASE, MAKE SU E SC EW IS STA TED IN EXISTING
TH EAD. DO NOT C EATE TWO SETS OF TH EADS ONE HOLE.

7
Service and Repair Manual
Model 845K
Wire Color
WIRING
SCHEMATIC
Inductor Boat
Wire Origin or
No. 110 V 120 V 230 V Part No. Connection
1 Blue White Blue Cord Switch
2 Brown Black Brown Cord Switch
3 ed ed ed Field Lead 9
4 ed ed ed Field Switch
5 Yellow Yellow Yellow Field Brush Holder
6 Black Black Black Field Brush Holder
7 White White White Motor Control Assy. Switch
8 Black Black Black Motor Control Assy. Switch
9 Black Blue ed Motor Control Assy. Lead 3
Tuck all wiring into left handle half
prior to assembling right handle half.
This will avoid pinched wires.
Wrap
wire tie around
electronics boat
to retain leads as
shown.
Cord to
be inserted into clamp
trap. Cord to extend 1/4"
minimum above top of
clamp. (For 120 V only.
See below for 110 V
and 230 V.)
Fast-on
terminals must be
completely connected
between leads 4 and 9.
Keep leads
away from
potential
pinch points.
Electronics Assembly
WIRING SPECIFICATIONS
SWITCH
CONNECTIONS
(Bottom view)
Tuck leads
5 and 6
away from
armature.
BRUSH CARD
ASSEMBLY
Brush to
brush plate
connections.
Brush shunt wires to
be positioned up in
brush tube slots, as
shown, for full travel.
Check that there is
clearance between the
fan and brush shunt
wires.
Brush
springs
must be seated
in slot located on
brush tubes.
As an aid to reassembly, take note of wire routin and
position in wire uides and traps while dismantlin tool.
110 V and 230 V
QUIK-LOK CORD
ORIENTATION

Service and Repair Manual
Model 845K 8
ELECTRICAL TESTING
Electrical test
Before assemby all electrical parts MUST be checked for safety, and that they conform to specification.
Testin the Armature (Flash Testin )
AArmature shaft to lamination pack 1500 Volts (min)
BLamination pack to commutator 1200 Volts (min)
CArmatuure shaft to commutator 3000 Volts (min)
ELECTRICAL PERFORMANCE TEST READINGS
CLUTCH SLIP
Measured on disassembly/assembly 35/45ft lbs 47/61Nm. (Non Electrical Test)
Note: On all test readings + or -5% of figures shown is acceptable.
845K
845K
MODEL 110V 120V 220V-240V
ARMATURES
.440/.506 Ohms .440/.506 Ohms 1.283/1.477 Ohms
FIELD COILS
845K
110V 120V 220V-240V
4.5/6.5 Amps 4.5/6.5 Amps 2.9/4.4 Amps
.349/.401 Ohms .349/.401 Ohms 1.339/1.54 Ohms
PERFORMANCE
110V 120V 220V-240V
Running No Lo d

9
Service and Repair Manual
Model 845K
WARNING
LETHAL VOLTAGES PRESENT!!
IMPORTANT
On completion of the assembly, the unit must be flash tested at 4000 volts.
Flash Test
1. With the breaker completely assembled and with the switch "ON", apply 2000 volts initially and increase rapidly to 4000 volts between the
main casting and one of the pins of the plug on the power supply cord. Apply test to both live and neutral pins.
2. The full voltage of 4000 volts should be maintained without breakdown or flashover for a few seconds.
3. If the armature has been tested, remove the carbon brushes before carrying out the test, (thus avoiding overstressing the armature
insulation system).
4. The test voltage must be applied between the main casting and each live pin of the plug in succession.
Runnin Test
1. Ensure the unit is switched "ON" before testing. Operate the unit for approx. 10 minutes at half voltage for initial 'bedding in' of the carbon
brushes followed by full operational voltage. Compare readings with Performance Data.
With the aid of the Fault Finding chart (below) the source of any malfunction may be quickly identified and repaired.
FAULT FINDING

9800 0336 01 a
55-24-3825 Drwg. 3 04/02
Atlas Copco Berema AB, S ckla Industr väg 1A, S-105 23
Nacka Sweden
Telephone: [phone] Fax: [phone]