Description
John Deere 21C 21S 25S 30S 38B Gasoline Line Trimmers and Brush Cutters Technical Manual (TM1494)
John Deere 21C 21S 25S 30S 38B Gasoline Line Trimmers and Brush Cutters INDEX:
SECTION IO—GENERAL INFORMATION
Group 05—Safety
Group 10—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—DisassembIe Engine
Group 10 —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 15—Thr0ttle Cable
SECTION 40—ELECTRlCAL REPAIR
Group 05—Flywheel
Group IO—Igniton System
SECTION SO—POWER TRAIN REPAIR
Group 05—Clutch and Drum Assembly
Group 10—Drive Shaft
Group i 5—Lower Housing
SECTION GO—CUTTING HEAD AND BLADES
Group 15—Nyion Line Cutting Heads
SECTION 210—TEST & ADJUSTMENT SPECIFICATIONS/OPERATIONAL CHECKOUT PROCEDURE
Group 05—Test & Adjustment Specifications
Group IO—Operational Checkout Procedure
SECTION 220—ENGlNE OPERATION & TESTS
Group 05—Component Location
Group IO—Engine Theory of Operation
Group 15—Diagnosis, Tests & Adjustments
SECTION 230–FUEL/AIR OPERATION TESTS & ADJUSTMENTS
Group 05—Component Location
Group IO—Theory of Operation
Group 15-—Diagnosis, Tests & Adjustments
SECTION 240–ELECTRICAL 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—Diagnosisj Tests & Adjustments
SECTION 260–CUTTING HEADS AND BLADES
Group IO—Theory of Operation
Group 15—Diagnosis, Tests & Adjustments
