John Deere 2120 Tractors Technical Manual (tm4252)

Table of Contents:
   INTRODUCTION
   GENERAL INFORMATION
      Specifications
      Pre-delivery, delivery and after-sales inspections
      Lubrication and service
      Engine and tractor tune-up and adjustment
      Separating assemblies
   ENGINE
      General information, diagnosing malfunctions
      Cylinder head, camshaft and balancer shafts
      Cylinder block, liners, pistons and connecting rods
      Crankshaft, crankshaft bearings and flywheel
      Timing gear train
      Oil pump, oil pressure regulating valve and oil filter
      Engine cooling system
      Speed control linkage
   FUEL SYSTEM
      Diagnosing malfunctions
      Fuel tank, transfer pump, fuel filters
      ROTO-DIESEL injection pump
      ROOSA-MASTER injection nozzles
      Cold weather starting aids
   ELECTRICAL SYSTEM
      Diagnosing malfunctions
      Components and wiring diagrams
   POWER TRAIN
      Engine clutch and clutch linkage
      HIGH-LOW shift unit
      Collar-shift transmission
      Differential assembly
      Final drives
      Continuous-running power shaft
      Independent power shaft
   FRONT AXLE, STEERING AND BRAKES
      Front axle
      Steering
      Brakes
   HYDRAULIC SYSTEM
      General information, diagnosing malfunctions, pressure tests
      Oil reservoir, filter, valves and oil cooler
      Hydraulic pump and transmission oil pump
      Rockshaft
      Selective control valves (spool type)
      Selective control valve (poppet valve type)
      Remote hydraulic cylinder
   MISCELLANEOUS
      Belt pulley
      DE LUXE seat
      Front and rear wheels
      Hydraulic trailer hitch
      Roll-over guard