Zetor 3320–6340 Tractor Workshop Manual – Horal & Turbo (P/N 735 342 310 269)

This 1990s-era Zetor workshop manual covers the 3320, 3340, 4320, 4340, 5320, 5340, 6320, and 6340 tractors, including Horal and 6340 Turbo variants. Publication No. 735 342 310 269 provides the internal specifications and assembly layouts required to repair engine and powertrain components.

PDF Search, Diagram Detail, and Page Count

Text access and wiring detail: Technical pages do not support PDF text search, and there are no embedded PDF bookmarks. Small terminal numbers and connector markings in the wiring diagrams require zooming.

The English manual is supplied as one printable, 267-page PDF, including the cover and 10 blank pages. The cab wiring supplement is included within the same publication and file.

Engine, Drivetrain, and Tractor System Repair

• Engine repair: Cylinder-head disassembly, valve adjustment, cylinder-liner replacement, crankshaft removal, and piston, bearing, and lubrication-system inspection data.

• Fuel and cooling systems: Injection-pump and injector disassembly, engine-specific injection-set adjustment sheets, water-pump service, and radiator, thermostat, and coolant-heater removal.

• Clutches and transmission: Step-by-step procedures for the double-purpose clutch, synchromesh clutches, reversing gear, creeper reduction gear, torque multiplier, and PTO assemblies.

• Axles and steering: Differential and wheel-reduction service, front driving axle variants, steering-gear disassembly, and hydrostatic steering priming and functional checks.

• Brakes and hydraulics: Shoe and disc brake service, brake and clutch bleeding, pneumatic brake adjustment, hydraulic lift-cover disassembly, and spool-valve service.

• Electrical systems: Wiring diagrams for tractors with and without cabs, charging-circuit checks, starter troubleshooting, and starter disassembly and reassembly.

The manual is suited to experienced tractor mechanics familiar with tractor splitting, bearing fits, and the use of pullers, assembly fixtures, and lifting equipment.

Engine Inspection and Lubrication

The engine section provides longitudinal and cross-section views of the Z 7201, piston sorting and identification data, cylinder-liner sorting dimensions, and crankshaft bearing tables covering standard and reground sizes. Performance tables distinguish the naturally aspirated and turbocharged engines; the 6320 Turbo also appears in the engine specifications.

Separate lubrication charts show the Z 5201 arrangement and the Z 7701 Turbo circuit with its heat exchanger and turbocharger oil supply. The centrifugal oil-filter section warns that mismatched rotor halves or incorrect alignment can upset the rotor’s balance and damage the filter.

Fuel Injection and Cooling Service

Injection-set adjustment sheets specify test speeds, delivery volumes, stroke counts, and checking conditions for the individual engine applications. The accompanying procedures cover the priming pump, fuel filters, injection pump, mechanical governor, and injectors.

Cooling coverage includes water-pump disassembly and leak testing, plus radiator, thermostat, and coolant-heater removal. Turbocharger removal is described, while internal turbocharger work is assigned to a specialized workshop.

Transmission Variants and PTO Assemblies

Transmission diagrams distinguish the basic gearbox from the fully synchronized arrangement, helping mechanics match shaft-removal instructions to the gearbox being repaired. Separate sections address reversing and creeper configurations, the torque multiplier control valve, and mechanical and pneumatic PTO clutch-release mechanisms.

The clutch instructions identify dedicated tooling, including fixture 95 9154 and centering mandrel 5511 9108. PTO coverage includes rear shaft arrangements with and without interchangeable ends, along with front PTO housing and clutch disassembly.

Axles, Steering, Brakes, and Hydraulics

Final-drive and axle sections detail differential disassembly, bearing adjustment, and wheel-reduction assemblies. Front axle coverage distinguishes rigid and spring-mounted extensions, heavy-duty and light-duty driving axles, and standard and automatic differentials.

Steering procedures cover ball-type steering, the power-steering booster, and hydrostatic components. Internal repairs to the steering pump and Danfoss steering unit are referred to specialists.

Brake coverage includes hydraulic pressure-equalizer disassembly and separate service and parking-brake arrangements. Pneumatic brake-valve internals are assigned to a specialized workshop. Hydraulic procedures cover dependent and independent pump removal, lift components, external and internal spool elements, filters, and quick couplers; auxiliary-cylinder coverage is limited to removal.

Electrical Diagnosis and Chassis Access

Wiring diagrams distinguish steering-lock and start-key instrument-panel arrangements, with a separate cab supplement for Horal and Turbo equipment. Starter checks address both on-tractor fault assessment and testing after removal; detailed alternator diagnosis and repair are reserved for specialists.

Further sections cover tie rods and suspensions, front and rear three-point hitches, trailer couplings, tractor body components, seats, cab removal, heating, and ballast weights. Bearing, GUFERO seal, and service-tool lists support component identification.

Use the full workshop instructions and appropriate lifting equipment for tractor separation and heavy assembly handling.

A Preview of Engine Fastener Torque Data

The cylinder-head section specifies 167–187 Nm for the cylinder-head nuts during reassembly and relates gasket selection to measured piston projection.

The crankshaft-pulley removal section gives a separate reassembly torque of 245 Nm for the pulley retaining nut, alongside the corresponding component drawing.