Kango 845M Installation and operating manual

9800 0333 01 a
845M
GB
Date Code
0001L2001

Service and Repair Manual
Model 845M 2
WARRANTY AND LIABILITY STATEMENT
All repairs may be completed with standard workshop tools and equipment.
SERVICE TOOLS
Use only Authorized parts. Any damage or mal unction caused by the use o 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.
Cleaning
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 845M
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
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 4669 60 Belly Shroud (1)
59 9170 3251 50 etaining ing (1)
62 9170 3250 80 O- 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 4669 70 Foam Slug Kit (1)
93 9170 3252 60 Handle Cushion (1)
110 9170 3254 00 ubber Washer (2)
114 9170 4660 90 Fan (1)
%SEE PAGE 5 FOR ADDITIONAL
LUBRICATION AND SERVICE NOTES
EXAMPLE:
Component Parts (Small #) Are Included
When Ordering The Assembly (Large #).
0
00
l
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)
26 9170 3237 30 ound Label (1)
27 9170 4650 10 Dowel Pin-Knurled (1)
29 9170 3250 70 etaining ing (1)
31 9170 4668 90 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)
41 9170 3252 10 Brush Spring (2)

Service and Repair Manual
Model 845M 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
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FASTENER TORQUE SPECIFICATIONS (IN.LBS.)
SEATING TORQUE
FIG. NO. MINIMUM MAXIMUM
13 20 25
14 120 140
15 20 25
16 30 35
19 30 35
20 25 30
21 20 25
22 20 25
25 30
15 20
610
105 60 70
HANDLE HALVES
AND SHROUDS
CUSHION GRIP
CRANKCASE COVER
23
24
9170 4667 00 CARBON BRUSH SERVICE KIT
THIS KIT CONTAINS:
2 --------------- Carbon Brush
l9170 4666 60 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 3259 60 Felt Seal
1 9170 4672 50 7 Oz. Tube "S2" Grease
2 9170 4669 10 Carbon Brush

5
Service and Repair Manual
Model 845M
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.
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.
Place .5 oz. grease in
lower clutch pinion cavity.
F ONT OF C ANKCASE
Place
1.5 oz.
grease in bottom
of crankcase prior to
installing crankshaft
assembly.
l
l
l
l
l
l
l
l
l
l
FIG. PART NO. DESCRIPTION OF PART NO. REQ.
1 9170 3256 50 1/8" Steel Ball (12)
3 9170 3258 60 Spacer (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 3258 90 M6 x 1.0 x 70 Pan Hd. Screw T-27 (4)
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)
35 9170 3259 80 Internal etaining ing (1)
38 9170 3259 30 Compression Spring (1)
43 9170 3255 90 Bearing etainer (1)
44 9170 4662 10 Crankcase (1)
45 9170 3254 40 Crankcase Cover (1)
46 9170 3259 90 Intermediate Housing (1)
48 9170 3259 00 Nose Flange (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 3258 50 Chuck Collar (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 4665 80 Spindle (1)
74 9170 3258 70 Collar (1)
75 9170 3256 80 Compression Spring (1)
76 9170 4670 10 Spring Flange (1)
78 9170 3260 20 Belleville Spring (4)
81 9170 4667 40 Barrel (1)
83 9170 3256 90 Spring Flange (1)
84 9170 3261 40 Gasket (1)
91 9170 3259 10 Key (2)
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)
102 9170 3259 20 Key etaining ing (1)
103 9170 3258 40 Seal etaining ing (1)
104 9170 3260 80 Striker (1)
105 9170 4668 10 DG50 x 16mm Torx Pan Head Screw (4)
106 9170 3258 30 Dust Seal (1)
107 9170 3260 10 Thrust Washer (2)
108 9170 3261 10 Barrel Thrust Washer (1)
109 9170 3260 90 Striker Cushion Washer (1)
111 9170 3259 70 Oil Seal (1)
112 9170 3259 60 Felt Seal (1)
113 9170 3257 90 Wave Washer (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)
SERVICE CARRYING CASE
No. 9170 4671 60
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.

Service and Repair Manual
Model 845M 6
FIG. %NOTES
54, 55, 56 TO REMOVE BELLY SHROUD #56 FROM TOOL, INSERT SMALL
SCREW DRIVER INTO GROOVE BETWEEN BELLY AND SIDE
SHROUDS #54 AND #55, ABOUT 1/3 OF THE WAY FROM THE
MOTOR END, AS SHOWN. PRY OUT AND DOWN ON BOTH
SIDES OF THE TOOL.
54, 55 TO INSTALL THE SIDE SHROUDS #54 AND #55, THE TOP HINGE
OF THE SHROUDS MUST BE COMPLETELY INTERLOC ED,
THEN THE BAC SIDE ROTATED CLOSED AROUND THE TOOL.
73 LUBRICATE ALL BORES IN SPINDLE #73 WITH A MEDIUM
COATING OF GREASE.
63, 108, 109 LUBRICATE RUBBER DAMPING WASHER #63, BARREL
THRUST WASHER #108 AND STRI ER CUSHION WASHER
#109 WITH A MEDIUM COATING OF GREASE BEFORE
ASSEMBLY.
10, 100 PRESS NEEDLE BEARING #10 IN ROD #100 SO THAT THE
SAME AMOUNT STIC S OUT ON BOTH SIDES OF THE ROD,
AS SHOWN.
9, 71 PRESS (2) NEEDLE BEARINGS #9 INTO HOLLOW CLUTCH
SHAFT #71, FLUSH WITH THE ENDS OF THE SHAFT.
11, 12, 46 PRESS NEEDLE BEARING #11 FLUSH TO THE INSIDE SURFACE
OF THE INTERMEDIATE HOUSING #46, AGAINST THE SNAP
RING. PRESS NEEDLE BEARING #12 FLUSH TO THE OUTSIDE
MACHINED SURFACE OF THE INTERMEDIATE HOUSING.
9, 44 PRESS NEEDLE BEARING #9 INTO CRAN CASE #44, FLUSH
WITH TOP OF BORE, AS SHOWN.
81 LIGHTLY GREASE INSIDE OF BARREL #81 BEFORE ASSEMBLY.
14, 19, 20, 23 FASTENERS #14, #19, #20 AND #23 ARE TO BE RE-ASSEMBLED
USING BLUE LOCTITE.
60, 61, 62, LUBRICATE O-RINGS #60, #61, #62, #66 AND #67 WITH GREASE.
66, 67
69 INSTALL BEVEL SNAP RING #69 WITH BEVEL SIDE UP.
4, 50, 80 PLACE BEARING CUP #80 ON SMALL ARMATURE BEARING
#4 BEFORE INSTALLING MOTOR COVER #50.
41 BRUSH SPRINGS #41 ARE TO BE WOUND 1/2 TURN TO
ENGAGE BRUSHES.
4 RUBBER SEAL SIDE OF BALL BEARING #4 TO FACE FAN.
95, 98 FACES OF PISTON #95 AND RAM #98 ARE TO BE FREE OF
GREASE.
105 WHEN REASSEMBLING BARREL AND CLUTCH SCREWS INTO
EXISTING CRAN CASE, MA E SURE SCREW IS STARTED IN
EXISTING THREAD. DO NOT CREATE TWO SETS OF THREADS
IN ONE HOLE.
INSERT SMALL
SCREW DRIVER
HERE
.016 REF.
(BOTH SIDES)
100
10
9
44

7
Service and Repair Manual
Model 845M
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 o wire routing and
position in wire guides and traps while dismantling tool.
110 V and 230 V
QUIK-LOK CORD
ORIENTATION

Service and Repair Manual
Model 845M 8
ELECTRICAL TESTING
Electrical test
Before assemby all electrical parts MUST be checked for safety, and that they conform to specification.
Testing the Armature (Flash Testing)
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.
845M
845M
MODEL 110V 120V 220V-240V
ARMATURES
.440/.506 Ohms .440/.506 Ohms 1.283/1.477 Ohms
FIELD COILS
845M
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 Loa

9
Service and Repair Manual
Model 845M
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.
Running 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 0333 01 a
55-24-3875 Drwg. 3 04/02
Atlas Copco Berema AB, S ckla Industr väg 1A, S-105 23
Nacka Sweden
Telephone: [phone] Fax: [phone]