Zetor 4911, 5911, 6911, and 6945 Tractor 1977–1980 Parts Catalog (P/N 10-222-212-336)

This 344-page PDF is an illustrated parts catalog for the Zetor 4911, 5911, 5945, 6911, and 6945 tractor family. It is suited to mechanics, parts-counter staff, and experienced owners who can match an exploded-view callout to the tractor's model and equipment configuration before ordering parts or planning a repair.

• Model and file coverage: Covers the five listed tractor models, with separate BK and UBK configuration callouts where the catalog distinguishes cab, seat, electrical, axle, or body equipment. The scan contains original printed pages 10-353.
• Engine and support systems: Identifies Crankcase I and II, crankshaft mechanism, valve gear, cylinder head, water pump, model-specific lubrication systems, fuel system, compressor, air cleaner, cooling system, and exhaust components.
• Clutch, transmission, and PTO: Breaks down the dual clutch, gearbox and reverse gear, input and splined shafts, reduction gearing, gear-shift mechanism, torque multiplier, differential drive and lock, PTO clutch controls, and PTO/cardan-shaft arrangements.
• Axles, steering, and brakes: Provides separate parts plates for the rear portal half-axle, driven front axle and wheels, non-driven front axle and hubs, steering and fuel controls, power steering, foot brake, pedals, and air-brake equipment.
• Hydraulics and rear equipment: Includes the hydraulic power-lift pump, hydraulic distributor, three-point linkage, swinging trailer hitch, fixed and swinging drawbar, wheel ballast, and axle-weight installations.
• Electrical and body configurations: Details Electrical Equipment I and II, engine bonnet, Aerolastic and UBK seat arrangements, mudguards and floor, front mudguard variants, and multiple safety-cab applications.
• Illustrated parts identification: Runs through 111 numbered illustrated plates, with figure/item callouts, part numbers, quantities, assembly-group references, remarks, and dedicated "mounted from" and "mounted to" tractor manufacturing-number fields.

Model-Specific Callouts, Not Generic Fitment

The catalog separates hardware that can look similar but does not share the same application. Four-wheel-drive content is identified through dedicated front driving axle, front driving wheel, and cardan-shaft groups for the 5945 and 6945 families. Other pages divide front axle, wheel-hub, mudguard, safety-cab, seat, and electrical equipment by standard, BK, and UBK configurations. The PTO material also includes a 540/1,000-rpm shaft arrangement for the cataloged Z 5911 through Z 6945 UBK application range.

Each table connects the number on the drawing to the corresponding part description and ordering reference. Many entries display paired short-form and extended part numbers, allowing both formats to be cross-checked during repair parts sourcing. Component names are printed in Czech, German, English, French, and Spanish.

What the Illustrated Plates Show

Representative named plates include Crankcase I, Valve Gear, Fuel System, Gearbox and Reverse Gear, Main Gear Case, Differential Drive and Differential Lock, and Hydraulic Power Lift Pump. The drawing set also covers small hardware, seals, bearings, shafts, housings, brackets, harness components, and mounting pieces that are easy to miss when only the major assembly is known.

Check the configuration notes before using a part number. The BK and UBK cab, seat, body, and electrical listings are not presented as interchangeable; forcing a nonmatching bracket or harness can damage mounting points or wiring. The torque-multiplier listings are likewise split according to whether group 68 is installed, and choosing from the wrong group can leave mating gears or splines incorrectly matched during transmission repair.

Parts Catalog Scope

This publication is for parts identification and repair planning, not workshop instruction. It does not provide removal and installation sequences, overhaul steps, troubleshooting charts, calibration procedures, torque tables, pressure-test values, clearance specifications, or electrical wiring schematics. The electrical chapters are illustrated equipment and harness parts layouts rather than diagnostic circuit diagrams.

Use the applicable workshop manual for repair procedures, adjustments, and safety instructions. Before opening hydraulic, axle, or driveline assemblies, support the tractor securely and relieve stored hydraulic pressure.