John Deere 2020, 2120 Tractor Repair Technical Manual (Serial 61020L – Up)

Table of Contents(Repair Technical Manual – TM4252)
SECTION 10-GENERAL INFORMATION
Group 5 – Specifications
Group 10 – Pre-delivery, delivery and after-sales inspections
Group 15 – Lubrication and service
Group 20 – Engine and tractor tune-up and adjustment
Group 25 – Removal and installation of assemblies
SECTION 20-ENGINE
Group 5 – General information, diagnosing malfunctions
Group 10- Cylinder head, camshaft and balancer shafts
Group 15- Cylinder block, liners, pistons and connecting rods
Group 20 – Crankshaft, crankshaft bearings and flywheel
Group 25 – Timing gear train
Group 30 – Oil pump, oil pressure regulating valve and oil filter
Group 35 – Engine cooling system
Group 40 – Speed control
SECTION 30- FUEL SYSTEM
Group 5 – Diagnosing malfunctions
Group 10 – Fueltank, transfer pump, fuel filters
Group 15 – ROTO-DIESEL injection pump
Group 20 – ROOSA-MASTER injection nozzles
Group 25 – Cold weather starting aids
SECTION 40-ELECTRICAL SYSTEM
Group 5 – Diagnosing malfunctions
Group 10- Components and wiring diagrams
SECTION 50- POWER TRAIN
Group 5 – Engine clutch and clutch linkage
Group 10- HIGH-LOW shift unit
Group 15 – Transmission
Group 20 – Differential assembly
Group 25 – Final drives
Group 30 – Continuous-running power shaft
Group 35 – Independent power shaft
SECTION 60- FRONT AXLE, STEERING AND BRAKES
Group 5 – Front axle
Group 10 – Steering
Group 15 – Brakes
SECTION 70-HYDRAULIC SYSTEM
Group 5 – General information, diagnosing malfunctions, pressure tests
Group 10- Oil reservoir, filter, valves and oil cooler
Group 15 – Hydraulic pump and transmission oil pump
Group 20 – Rockshaft
Group 25 – Selective control valves (spool type)
Group 30 – Selective control valve (poppet valve type)
Group 35 – Remote hydraulic cylinder
SECTION 80-MISCELLANEOUS
Group 5 – Belt pulley
Group 10- DE LUXE seat
Group 15 – Front and rear wheels
Group 20 – Hydraulic hitch
Group 25 – Roll guard
This Unit of the Service Manual contains maintenance instructions for the Model 2020, 2120 Tractor.
Included are complete instructions for removal, disassembly, inspection, repair, assembly, and installation of all parts and assemblies.
In addition, the manual contains a brief description of the more complicated systems of the tractor and tells how they operate. Dimensions of many new wearing parts are given as an aid in determining when parts replacement is necessary. Tests and adjustments required to keep the tractor operating at full efficiency are explained in detail. Full instructions on preparing a new tractor for delivery to the customer are included.
Use the manual whenever in doubt about correct maintenance procedures. Use it as a text book for new Service Department personnel who are unfamiliar with John Deere Tractor.
Daily use of the manual as a guide for any and all service problems will reduce error and costly delay to the minimum and assure you the best in finished service work.