Zetor 3320, 3340, 4320, 4340, 5201, 5320, 6340 Factory Workshop Manual

This 267-page, 1990s-era PDF workshop publication serves as the official reference for the Zetor 3320 through 6340 tractor series. It provides the internal specifications and assembly layouts required to repair engine and power train components.

• Covers the Zetor 3320, 3340, 4320, 4340, 5201, 5320, 6340, 7201, and 7701 series, including both naturally aspirated and turbocharged configurations
• Original OEM documentation focusing on mechanical and power train systems
• Features 101 exploded-view diagrams illustrating component assembly and sub-assembly hierarchies
• Explores the complete hydraulic system, electrical system, air brakes, front Power Take-Off (P.T.O.) shafts, and cab structure
• Details tie rods, suspensions, tractor body components, seats, and ballast weights

Instead of relying on expensive dealership services, having this exact factory data directly on your workbench helps technicians significantly reduce bay time. It equips independent mechanics to confidently complete step-by-step procedures like overhauling the double-purpose clutch, servicing synchromesh clutches, adjusting fuel injection sets, and dismantling the torque multiplier control valve, ensuring a reliable repair and a permanent fix on the first attempt.

Component and System Overview

This diagnostic reference details the mechanical architecture of the Zetor lineup. The content starts with the engine assembly, providing longitudinal section drawings, cross section views, and gear tables that give you a clear look at the cylinder head, crankshaft components, oil pump lubrication circuits, and internal valve-gear mechanisms. Subsequent chapters outline the power train configurations, supported by detailed transmission diagrams and engine lubrication charts. These sections detail the transmission shifting mechanisms, synchromesh clutches, and the torque multiplier assembly. You will also find detailed schematics for the final drive, rear axle, front driving axle, steering, and braking systems. The inclusion of essential wiring diagrams further streamlines your troubleshooting workflow for electrical faults.

Specifications and Reference Values

Technical specifications document performance parameters across the entire engine range. This covers displacement metrics, injection sequences, and rated idle speeds. For engine top-end work, the manual provides detailed piston sorting identification data and cylinder liner clearance ranges.

When overhauling these specific Zetor powerplants, technicians must navigate critical reassembly traps. For instance, the upper and lower halves of the centrifugal oil filter rotor are precisely balanced at the factory as a matched unit. Failing to align their specific marks during installation—or mistakenly swapping a half with a part from another filter—will induce severe high-RPM vibrations and destructive centrifugal forces that can shatter the housing.

Cooling system specifications outline radiator and thermostat removal protocols, alongside electrical coolant heater data. The documentation includes exact torque values for major fasteners. For instance, cylinder head nuts require 167–187 Nm, while crankshaft pulley nuts are set at 245 Nm. Reference data for the injection sets provides precise RPM and volume benchmarks for tuning the injection pump drive. Please note that while this description outlines the manual's contents, proper shop safety dictates referencing the full factory documentation before beginning any heavy machinery maintenance.