Description

John Deere 2120 Tractor Technical Manual (TM4252)

John Deere 2120 Tractor INDEX:

SECTION 10 — GENERAL INFORMATION
Group 5 – Specifications
Group 10 • Pre.delivery, delivery and after-sales inspections
Group 15 – Lubrication and periodic service
Group 20 – Engine and tractor tune•up and adjustment
Group 25 Separation
SECTION 20 ENGINE
Group – General information, diagnosing malfunctions
Group 10 – Cylinder head and camshaft
Group 15 • Cylinder block, liners, pistons and connecting rods
Group 20 – Crankshaft, main 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 • Fuel tank, transfer pump, fuel filters
Group 15 BOSCH injection pump
ROTO DIESEL injection pump
ROOSA MASTER MODEL CB injection pump
ROOSA-MASTER injection nozzles
Group 35 – BOSCH injection nozzles
Group 40 – Cold weather starting aids

SECTION 40 ELECTRICAL SYSTEM
Group 5 – Diagnosing malfunctions
Group 10 • “BILUX” lighting system
Group 15 – Sealed-beam lighting system (from tractor serial no. 77054 L)
Group 16 – Sealed-beam lighting system (up to tractor serial no. 77053 L)
Group 20 – Starting motor
Group 2ö – Alternator and regulator
Group 30 – Generator and regulator
SECTION 50 — POWER TRAIN
Group 5 • Engine dual-stage clutch and clutch linkage
Group IO Collar-shift transmission
Group 15 – Differential assembly
Group 20 – Final drives
Group 25 – PTO shafts
SECTION 60 — FRONT AXLE, STEERING SYSTEM AND BRAKES
Group 5 Front axle
Group 10 • Manual and power steering
Group 15 – Brakes
SECTION 70 — HYDRAULIC SYSTEM
Group 5 • General information, diagnosing malfunctions, pressure tests
Group IO – Oil reservoir, filter and valves
Group 15 Hydraulic pump and transmission oil pump
Rockshaft
Group 25 Selective control valve