John Deere 21C 21S 25S 30S 38B Gasoline Line Trimmers and Brush Cutters Technical Manual (TM1494)

TABLE OF CONTENTS

SECTION IO—GENERAL INFORMATION
Group 05—Safety
Group IO—General Specification
Group 15—Repair Specifications
Group 20—Fuels and Lubricants
Group 30—Features and Attachments
Group 35—Service Information Bulletin Listing
SECTION 20—ENGlNE REPAIR
Group 05—Disassemble Engine
Group 1 0 —Inspect and Repair Engine
Group 15—Assemble Engine
Group 20—Recoil Starter
Group 25—Muffler
SECTION 30—FUEL AND AIR REPAIR
Group 05—Air Cleaner, Fuel Lines and Filter
Group IO—Carburetor
Group 5—Throttle Cable
SECTION 40—ELECTRlCAL REPAIR
Group 05—Flywheei
Group 10—1gniton System
SECTION SO—POWER TRAIN REPAIR
Group 05—Clutch and Drum Assembly
Group IO—Drive Shaft
Group 15—Lower Housing
SECTION GO—CUTTING HEAD AND BLADES
Group 5—NyIon Line Cutting Heads

SECTION 230—FUEL/AlR OPERATION TESTS & ADJUSTMENTS
Group 05—Component Location
Group IO—Theory of Operation
Group 15-—Diagnosis, Tests & Adjustments
SECTION 240—ELECTRlCAL OPERATION TESTS & ADJUSTMENTS
Group 05—Component Location
Group IO—Theory of Operation
Group 15—Diagnosis, Tests & Adjustments
Group 20—Wiring Schematics
SECTION 250–POWER TRAIN OPERATION TESTS & ADJUSTMENTS
Group 05—Component Location
Group 10—Theory Of Operation
Group 15-—Diagnosis, Tests & Adjustments
SECTION 260—CUTTING HEADS AND BLADES
Group IO—Theory of Operation
Group 15—Diagnosis, Tests & Adjustments
Index