MTD 70 Series Manuals

Manuals and User Guides for MTD 70 Series. We have 3 MTD 70 Series manuals available for free PDF download: Shop Manual, Professional Shop Manual

MTD 70 Series Shop Manual (142 pages)

Brand: MTD | Category: Engine | Size: 7 MB

Table of Contents
3
Chapter 1: Introduction

7
- Professional Service Manual Intent
  7
- Safety
  7
- Fasteners
  9
- Assembly Instructions
  9
- Model and Serial Number
  11
- Maintenance
  11
- Spark Plugs
  12
- Air Filter
  13
- Oil Type and Capacity
  14
- Changing the Oil
  16
- Fuel System
  17
- Servicing the Fuel System
  17
- Fuel Filter
  18
- Valve Lash
  19
- Exhaust System
  21
- Cleaning the Engine
  21
- General Torque Specifications
  21
- Definitions
  23
Chapter 2: Basic Troubleshooting

23
- Introduction
  23
- Steps to Troubleshooting
  23
- Define the Problem
  23
- Identify Factors that Could Cause the Problem
  25
- Repairing the Problem
  29
- Prime Test
  30
- Leak-Down Test
  30
- Compression Test
  32
- PCV Testing
  33
Chapter 3: Air Intake System

35
- Air Filter
  35
- Paper Filter with a Thumb Screw
  35
- Paper Filter with a Snap Fit Door
  35
- Paper Air Filter Housings
  36
- Foam Air Filter
  37
- Foam Air Filter Housing
  37
- Carburetor Insulator
  39
Chapter 4: The Fuel System and Governor

43
- Fuel Lines
  43
- Inspect the Fuel Lines
  43
- Inspecting the Fuel
  44
- Test Fuel for Alcohol
  44
- The Fuel Filter
  45
- Fuel Tank Vent
  46
- The Fuel Tank
  47
- Evaporative (EVAP) Emissions System
  49
- Troubleshooting the EVAP System
  52
- Roll over Valve Vent
  53
- Charcoal Canister
  55
- Manual Choke
  56
- Autochoke
  56
- 1P61/1P65 Autochoke
  57
- 1P70 Autochoke
  58
- Temperature Compensating Auto Choke
  59
- Primer
  60
- Carburetors
  61
- Inspecting the Carburetor
  61
- Disassembly and Rebuilding the Carburetor
  62
- Governor
  67
- Governor Shaft
  67
- Governor Cup and the Governor Gear
  70
Chapter 5: Lubrication

71
- Oil Type and Quantity
  71
- Oil Dipstick
  72
- Dip Stick Tube Removal
  73
- Lubrication System
  74
- Pcv
  75
Chapter 6: Starter and Charging Systems

79
- Recoil Starter Removal
  79
- Starter Cup
  80
- Starter Rope
  81
- Starter Pulley and Recoil Spring
  83
- Electric Starter Relay
  85
- Testing the Starter Relay
  86
- Electric Starter
  88
- Schematic
  89
Chapter 7: Ignition System

91
- Troubleshooting the Ignition System
  91
- Troubleshooting the Stop Switch
  92
- About the Spark Plug
  97
- Cleaning the Spark Plug
  97
- Inspection of the Spark Plug
  97
- Spark Plug Removal
  97
- Ignition Module
  98
- Module Removal
  98
- Installing the Module and Setting the Air Gap
  99
- Engine Brake and Stop Switch (if Equipped)
  100
- Adjusting the Brake Assembly (if Equipped)
  101
- Flywheel
  102
Chapter 8: Exhaust

105
- To Remove/Replace the Conventional Muffler
  105
- Catalytic Converter Muffler
  107
Chapter 9: Cylinder Head

109
- Cylinder Head
  109
- Valves
  112
Chapter 10: Crankshaft, Piston and Connecting Rod

115
- Crank Shaft Inspection
  118
- Piston Inspection
  119
- Connecting Rod Inspection
  120
- Cylinder Inspection
  121
- Bearings
  122
- Reassembly
  123
- Engine Specifications Chart
  127
- Engine Torque Values Chart
  132
Chapter 11: Failure Analysis

133
- Abrasive Ingestion
  133
- Insufficient Lubrication
  133
- Mechanical Breakage/ Wear
  133
- Detonation/Pre-Ignition
  140

MTD 70 Series Shop Manual (134 pages)

Horizontal Shaft Engines

Brand: MTD | Category: Engine | Size: 5 MB

Table of Contents
3
Chapter 1: Introduction

7
- Professional Service Manual Intent
  7
- Safety
  7
- Fasteners
  9
- Assembly Instructions
  9
- Model and Serial Number
  11
- Maintenance
  11
- Spark Plugs
  12
- Air Filter
  13
- Oil Type and Capacity
  14
- Changing the Oil
  16
- Fuel System
  17
- Servicing the Fuel System
  17
- Fuel Filter
  17
- Valve Lash
  19
- Exhaust System
  22
- Cleaning the Engine
  22
- General Torque Specifications
  22
Chapter 2: Basic Troubleshooting

23
- Definitions
  23
- Introduction
  23
- Steps to Troubleshooting
  23
- Define the Problem
  23
- Identify Factors that Could Cause the Problem
  25
- Repairing the Problem
  29
- Prime Test
  30
- Leak-Down Test
  30
- Compression Test
  32
- PCV Testing
  33
- Troubleshooting Flow Charts
  34
- Engine Operation Problems
  35
Chapter 3: Air Intake Systems

39
- Snow Engines
  39
- Heat Box
  39
- Chore Engines
  42
- Air Filters
  42
- Air Filter Base and Intake Elbow
  43
- Carburetor Insulator
  44
Chapter 4: The Fuel System and Governor

47
- Fuel Line
  47
- Inspect the Fuel Lines
  47
- Inspecting the Fuel
  48
- Test Fuel for Alcohol
  48
- Fuel Filter
  49
- Fuel Tank Vent
  50
- To Test the Cap Vent
  50
- The Fuel Tank
  51
- Choke
  53
- Choke Linkage
  54
- Primers
  55
- Evaporative (EVAP) Emissions System
  56
- Troubleshooting the EVAP System
  57
- Roll over Valve Vent
  58
- Charcoal Canister
  59
- Testing a Charcoal Canister
  60
- Carburetors
  61
- Inspecting the Carburetor
  61
- Disassembly and Rebuilding the Carburetor
  61
- Governor
  65
- Governor Arm
  65
- Governor Shaft
  66
- Governor Cup and the Governor Gear
  67
Chapter 5: Lubrication

69
- Oil Type and Quantity
  69
- Oil Dip Stick
  70
- Dip Stick Tube Removal
  71
- Lubrication System
  72
- Positive Crankcase Ventilation Valve
  73
Chapter 6: Starter and Charging Systems

75
- Recoil Starter Removal
  75
- Starter Cup
  75
- Starter Rope
  77
- Starter Pulley and Recoil Spring
  78
- Electric Starter
  80
- Electric Starter Switch
  81
- Charging System
  85
- Stator
  86
- Rotor
  86
Chapter 7: Ignition System

87
- Troubleshooting the Ignition System
  87
- Stop Switch
  88
- Remote (Ignition) Stop Switch
  89
- The Module
  91
- Module Removal
  92
- Installing the Module and Setting the Air Gap
  92
- Flywheel
  93
- The Spark Plug
  94
- Cleaning the Spark Plug
  94
- Inspection of the Spark Plug
  94
- Spark Plug Removal
  94
Chapter 8: Exhaust

95
- Summer Engines
  95
- Spark Arrestor
  95
- To Remove/Replace the Muffler
  96
- Snow Engines
  97
Chapter 9: Cylinder Head

99
- Valves
  103
- Push Rod Bushings
  106
Chapter 10: Crankshaft, Piston and Connecting Rod

109
- Crank Shaft Inspection
  112
- Piston Inspection
  113
- Connecting Rod Inspection
  114
- Cylinder Inspection
  115
- Bearings
  116
- Reassembly
  117
- Engine Specifications Chart
  120
- Engine Torque Values Chart
  124
Chapter 11: Failure Analysis

125
- Abrasive Ingestion
  125
- Insufficient Lubrication
  128
- Engine Overspeed
  129
- Overheated
  130
- Mechanical Breakage/ Wear
  131
- Detonation/Preignition
  131

MTD 70 Series Professional Shop Manual (89 pages)

Horizontal Shaft Engines

Brand: MTD | Category: Engine | Size: 5 MB

Table of Contents
3
Chapter 1: Introduction

7
- Professional Shop Manual Intent
  7
- Assembly
  7
- Maintenance
  9
- Spark Plugs
  9
- Air Filters
  10
- Oil Type and Capacity
  11
- Changing the Oil
  11
- Fuel
  12
- Fuel Filters
  12
- Valve Lash
  13
- Spark Arrestor
  14
- Cleaning the Engine
  14
- General Torque Specifications
  15
- Maintenance Chart
  15
Chapter 2: Basic Troubleshooting

16
- Definitions
  16
- Introduction
  16
- Steps to Troubleshooting
  16
- Define the Problem
  16
- Identify Factors that Could Cause the Problem
  17
- Repairing the Problem
  21
- Prime Test
  21
- Leak down Test
  22
- Compression Test
  23
- PCV Testing
  24
Chapter 3: Air Intake Systems

25
- Snow Engines
  25
- Heat Box
  25
- Chore Engines
  27
- Air Filters
  27
- Air Filter Base and Intake Elbow
  28
- Carburetor Insulator
  29
Chapter 4: The Fuel System and Governor

32
- Inspecting the Fuel
  32
- Test Fuel for Alcohol
  32
- Fuel Tank Vent
  33
- To Test the Cap Vent
  33
- The Fuel Filter
  33
- Inspect the Fuel Lines
  34
- The Fuel Tank
  34
- Choke
  35
- Choke Linkage
  36
- Primers
  36
- Carburetors
  37
- Inspecting the Carburetor
  37
- Disassembly and Rebuilding the Carburetor
  38
- Governor
  42
- Governor Arm
  42
- Governor Shaft
  43
- Governor Cup and the Governor Gear
  44
Chapter 5: Lubrication

45
- Oil Type and Quantity
  45
- Oil Dip Stick
  45
- Dip Stick Tube Removal
  46
- Lubrication System
  47
- Positive Crankcase Ventilation Valve
  48
Chapter 6: Starter and Charging Systems

49
- Recoil Starter Removal
  49
- Starter Cup
  49
- Starter Rope
  50
- Starter Pulley and Recoil Spring
  51
- Electric Starter
  53
- Charging System
  54
- Stator
  55
- Rotor
  55
Chapter 7: Ignition System

56
- Troubleshooting the Ignition System
  56
- Stop Switch
  57
- Remote (Ignition) Stop Switch
  58
- The Module
  59
- Module Removal
  60
- Installing the Module and Setting the Air Gap
  61
- Flywheel
  61
- About the Spark Plug
  62
- Cleaning the Spark Plug
  62
- Inspection of the Spark Plug
  62
- Spark Plug Removal
  63
Chapter 8: Exhaust

64
- Summer Engines
  64
- Spark Arrestor
  64
- To Remove/Replace the Muffler
  65
- Snow Engines
  66
Chapter 9: Cylinder Head

67
- Valves
  70
- Push Rod Bushings
  72
Chapter 10: Crankshaft, Piston and Connecting Rod

73
- Crank Shaft Inspection
  75
- Piston Inspection
  76
- Connecting Rod Inspection
  77
- Cylinder Inspection
  77
- Bearings
  78
- Reassembly
  79
- Engine Specifications Chart
  82
- Engine Torque Values Chart
  83
Chapter 11: Failure Analysis

84
- Abrasive Ingestion
  84
- Insufficient Lubrication
  86
- Engine Overspeed
  87
- Overheated
  88
- Mechanical Breakage/ Wear
  89
- Detonation/Preignition
  89

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MTD 70 Series Manuals

MTD 70 Series Shop Manual (142 pages)

Table of Contents

Chapter 1: Introduction

Chapter 2: Basic Troubleshooting

Chapter 3: Air Intake System

Chapter 4: The Fuel System and Governor

Chapter 5: Lubrication

Chapter 6: Starter and Charging Systems

Chapter 7: Ignition System

Chapter 8: Exhaust

Chapter 9: Cylinder Head

Chapter 10: Crankshaft, Piston and Connecting Rod

Chapter 11: Failure Analysis

MTD 70 Series Shop Manual (134 pages)

Table of Contents

Chapter 1: Introduction

Chapter 2: Basic Troubleshooting

Chapter 3: Air Intake Systems

Chapter 4: The Fuel System and Governor

Chapter 5: Lubrication

Chapter 6: Starter and Charging Systems

Chapter 7: Ignition System

Chapter 8: Exhaust

Chapter 9: Cylinder Head

Chapter 10: Crankshaft, Piston and Connecting Rod

Chapter 11: Failure Analysis

MTD 70 Series Professional Shop Manual (89 pages)

Table of Contents

Chapter 1: Introduction

Chapter 2: Basic Troubleshooting

Chapter 3: Air Intake Systems

Chapter 4: The Fuel System and Governor

Chapter 5: Lubrication

Chapter 6: Starter and Charging Systems

Chapter 7: Ignition System

Chapter 8: Exhaust

Chapter 9: Cylinder Head

Chapter 10: Crankshaft, Piston and Connecting Rod

Chapter 11: Failure Analysis

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