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Service and Repair Manual

Model 845M

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)

Armature shaft to lamination pack

1500 Volts (min)

Lamination pack to commutator

1200 Volts (min)

Armatuure 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 re or -5% of figures shown is acceptable.

845M

MODEL

110V

120V

220V-240V

ARMATURES

.440/.506 Ohms

1.283/1.477 Ohms

FIELD COILS

845M

110V

120V

220V-240V

4.5/6.5 Amps

2.9/4.4 Amps

.349/.401 Ohms

1.339/1.54 Ohms

PERFORMANCE

110V

120V

220V-240V

Running No Load

Summary of Contents for 845M

Page 1: ...9800 0333 01 a 845M GB DateCode 0001L2001 ...

Page 2: ...to prevent any adverse damage occuring ALL SEALS GASKETS GREASE OR OTHER PARTS DEEMED NECESSARY FOR SERVICINGARE IN THE SERVICE KIT ALLNEEDLE ROLLER BEARINGS SHOULD BE PRESSED WITH THE ROUNDED EDGE ENTERINGTHE BORE FIRST ANDTHE PRESSTOOL PRESSINGAGAINSTTHE FLAT SURFACE OF THE BEARING Cleaning All mechanical parts with the exception of any sealed bearings should be cleaned in a suitable cleaning fl...

Page 3: ...0 Rubber 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 ...

Page 4: ...____________________________ ________________________________________________________________ ___________________________________________ ___________________________________________ ________________________________________ ___________________________________________ ___________________________________________ FASTENER TORQUE SPECIFICATIONS IN LBS SEATING TORQUE FIG NO MINIMUM MAXIMUM 13 20 25 14 1...

Page 5: ...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 Ring 1 61 9170 3255 80 O Ring 1 63 9170 3261 00 Rubber Damping Washer 1 64 9170 3255 00 Seal Cover 1 65 9170 3258 50 Chuck Collar 1 66 9170 3255 50 O Ring 1 67 9170 4665 50 O Ring 1 68 9170 3257 40 ...

Page 6: ...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 CRANKCASE 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 ...

Page 7: ...nics 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 AS...

Page 8: ...00 Volts min C Armatuure 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 ...

Page 9: ...d 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 minut...

Page 10: ...9800 0333 01 a 55 24 3875 Drwg 3 04 02 Atlas Copco Berema AB Sickla Industriväg 1A S 105 23 Nacka Sweden Telephone 46 0 8 743 9600 Fax 46 0 8 743 9650 ...

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