Stihl 050 051 075 076 Chain Saw Service Manual & Troubleshooting Guide

Description

This 72 page, Stihl 050 051 075 076 Chain Saw Service Manual & Troubleshooting Guide provides detailed service information, step-by-step repair instruction and maintenance specifications for the Stihl 051 and 076 Chain Saws and older models. Please note this manual is a high quality reproduction of the original out of print book.

The following models are mentioned in this manual.

050 AV, 051 AV
051 AV electronic
075 AV electronic
076 AV electronic

This Service Manual covers model 050, 051 and 075 chain saws up to machine number 5277 720 as well as later machines unless technical information bulletins have been issued in the meantime with updated repair procedures. With the exception of the rewind starter and the ignition system, the new 076 and the 075 are identical. The relevant engineering changes are outlined in technical information bulletin number 27.80. In the event of faults it is quite possible that a single fault may have several causes. It is therefore advisable to contsult the “Troubleshooting Chart” in each chapter when tracing faults. We also recommend that you make use of the exploded views in the illustrated parts lists when carrying out repair work.

Table of Contents:

Specifications
Engine
Fuel System
Ignition System
Tightening Torques
Cutting Attachment
Weights
Special Accessories

Clutch, Chain Drive and Chain Brake
Construction and Operation
Clutch and Chain Sprocket
Chain Brake
Troubleshooting Chart
Disassembly and Repair
Clutch and Chain Sprocket
Machines with Isolating clutch
Chain Brake

Engine
Construction
Troubleshooting Chart
Exposing the Cylinder
Disassembly of Cylinder and Piston
Assembly of Piston and Cylinder
Disassembly of Crankcase-Removal of Crankshaft
Installing the Crankshaft-Assembly of Crankcase
Leakage Testing the Crankcase
Pressure Test

Ignition System
Construction
Description of Operation Breaker-Controlled Magneto Ignition
Bosch Transistor-Controllec (Breakerless)
Magneto Ignition
Troubleshooting Chart
Breaker-Controlled Ignition System Electronic Ignition System
Function and Repair of Components
Spark Plug
Ignition Lead
Ignition Stop Switch Lead/
Ground Lead
Ground Lead Contact
Flywheel
Ignition Armature
Resistance Test on
Primary Winding
Resistance Test on
Secondary Winding
Testing with Ignition
Coil Tester
Condenser
Contact Set
Trigger Plate (Transistor Ignition)
Ignition Timing
Checking Breaker-Controlled Ignition
Adjusting Breaker-Controlled Ignition
Checking Electronic Ignition
Magneto Edge Gap on
Breaker-Controlled Ignition

Rewind Starter
Construction and Operation
Troubleshooting Chart
Disassembly
Replacing the Starter Rope
Replacing the Rewind Spring
Tensioning the Rewind Spring
Replacing the Starter Rope Guide Bush
Replacing the Friction Shoe Plates
Replacing the Starter Hub
Routine Maintenance

AV Handle System
Construction and Operation Repair

Throttle Mechanism
Disassembly and Repair

Chain Lubrication
Construction and Operation of Oil Pump
Oil Tank/Tank Vent
Troubleshooting Chart
Pickup Hose/Pickup Body Cover Plate/Worm
Disassembly and Repair of Oil Pump
Manual Oil Pump
Construction and Operation of Manual Oil Pump
Disassembly and Repair

Decompression Valve
Construction and Operation

Fuel System
Construction and Operation of Carburetor
Operation of Fuel Pump
Operation of Carburetor
Troubleshooting Chart
Leakage Test (Pressure Test) on Carburetor
Disassembly of Carburetor
Repair of Carburetor
Carburetor Adjustment
Fuel Line and Tank Vent
Air Filter