Craftsman 143.629012 Dokumentacja Pobierz pdf (Strona 49)

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BASIC CHECKS

Before going into extensive checks, be sure to perform the more basic checks first, such as:

1. Battery defective or not charged.

2. Corroded or loose terminals and connections, or wrong connections.

3. Cracked insulation or broken wires.

4. A wire "grounding out" in the system.

5. Defective switch.

6. Operator presence system functioning properly.*

*NOTE: ALL LAWN AND GARDEN TRACTORS BUILT AFTER JULY OF 1987 ARE REQUIRED TO HAVE AN

OPERATOR PRESENCE SYSTEM AND MANY CAME EQUIPPED WITH SUCH A SYSTEM PRIOR TO THIS DATE.

IF THE TRACTOR IS "CUTTING OUT" OR WILL NOT START, THIS IS AN AREA THAT SHOULD BE CHECKED OUT.

1 2 ... 44 45 46 47 48 49 50 51 52 53 54 ... 123 124

TECUMSEH 1
CONTENTS 2
CHAPTER 1 GENERAL INFORMATION 5
SHORT BLOCKS 6
SBV-2316 6
SER 4291 6
ENGINE OIL 7
TUNE-UP PROCEDURE 7
CHAPTER 2 AIR CLEANERS 9
PAPER -TYPE FILTER ELEMENT 10
DISASSEMBLY PROCEDURE 10
GENERAL INFORMATION 11
OPERATION 12
FUEL PRIMERS 12
IMPULSE FUEL PUMPS 13
FLOAT STYLE CARBURETORS 13
CARBURETORS 13
COMPONENTS 14
CARBURETOR IDENTIFICATION 15
DUAL SYSTEM CARBURETORS 15
SERIES 1 CARBURETORS 15
DIAPHRAGM CARBURETORS 15
TROUBLESHOOTING 17
IDLE RESTRICTOR 19
Diaphragm Carburetors 23
IMPULSE FUEL PUMP 23
FLOAT ADJUSTING PROCEDURE 23
INSPECTION 24
ASSEMBLY 25
Inlet Fuel Fitting 28
STANDARD SERVICE CARBURETORS 28
Fuel Fitting 28
Choke Shaft 28
Throttle Lever 29
Idle Speed Adjustment Screw 29
Final Checks 29
ENGINE MODEL 32
EXPOSED SHAFT LENGTH 32
SPEED CONTROLS AND LINKAGE 33
HORIZONTAL SHAFT ENGINES 35
VERTICAL SHAFT ENGINES 37
GOVERNOR OVERRIDE SYSTEM FOR 38
TVM170, 195 AND 220 ENGINES 38
GOVERNED / NON-GOVERNED IDLE 38
CHAPTER 5 REWIND STARTERS 39
VM, TVM, TVXL) 40
Disassembly Procedure 40
Assembly Procedure 41
STYLIZED REWIND STARTER WITH 41
PLASTIC RETAINER 41
Assembly 42
ALUMINUM STARTER (HM, VM) 42
ENGAGEMENT TYPE 43
CHAPTER 6 ELECTRICAL SYSTEMS 46
ELECTRICAL TERMS 48
BASIC CHECKS 49
TESTING PROCEDURE 52
STARTING CIRCUIT 52
CHARGING CIRCUIT 52
350 Milliamp Charging System 52
HMSK 70-80-100 53
D.C. Charging Adaptor 53
Harness Sleeve 56
HM70-80-100, HHM80 56
Under Blower Housing 57
TVXL195-220 57
External to Engine 58
A.C. OUTPUT 60
WITH EXPOSED SHAFT 61
STARTERS WITH CAP ASSEMBLY 61
INSPECTION AND REPAIR 62
Brush Card Replacement 62
BOTTOM SURFACE SYSTEM 63
OPERATION (CONTINUED) 64
INSIDE EDGE SYSTEM 64
STARTER INTERLOCK SWITCH 66
CONTROL CABLE 66
Bottom Surface 66
Inside Edge 66
BRAKE BRACKET REPLACEMENT 66
CHAPTER 8 IGNITION 67
IGNITION SYSTEM (DIAG. 7) 68
IGNITION TROUBLESHOOTING 70
IGNITION TIMING PROCEDURE 72
The Standard Point System 72
SPARK PLUG SERVICE 72
Solid State Ignition Timing 74
Other Solid State Systems 75
SERVICE TIPS 75
4-CYCLE ENGINE THEORY 76
LUBRICATION SYSTEMS 77
COUNTERBALANCE SYSTEMS 77
ENGINE OPERATION PROBLEMS 79
ENGINE OVERHEATS 81
SURGES OR RUNS UNEVENLY 81
ENGINE MISFIRES 81
ENGINE KNOCKS 81
BREATHER PASSING OIL 82
LACKS POWER 82
DISASSEMBLY PROCEDURE 83
CYLINDERS 85
CYLINDER HEADS 86
Emission Rings 87
Connecting Rods 87
CRANKSHAFTS AND CAMSHAFTS 88
Camshafts 88
Valve Seats 90
Valve Lifters 90
Oversize Valve Guides 90
CRANKCASE BREATHERS 90
Top Mounted Breather 90
Cylinder Cover 91
Side Mounted Breather 91
Integral Breather 91
Oil Seal Service 92
CRANKSHAFT BEARING SERVICE 92
COUNTERBALANCE SERVICE 93
FLYWHEEL SERVICE 93
CHAPTER 10 94
ENGINE SPECIFICATIONS 94
All dimensions are in inches 100
* Check to detemine bore size 101
(.762/.787 mm) 101
CHAPTER 11 106
Use tool 670266 107
DECIMAL/FRACTION CONVERSIONS 109

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Craftsman 143.629012 Dokumentacja Strona 49

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