1982 Zetor 8011, 8045, 12011, 12045 Tractor Workshop Manual (P/N 735 342 310 153)

This workshop manual covers assembly, disassembly, and repair of the 1982 Zetor 8011, 8045, 12011, and 12045 tractors. It is edition 1A/1982, Publication No. 735 342 310 153.

Search, navigation, and wiring detail: PDF text search and embedded bookmarks are not available. Small wiring labels require zooming, and some terminal markings remain difficult to distinguish.

• Engine repair: Cylinder-head service, valve adjustment, timing-gear installation, and crankshaft, piston, and cylinder-liner inspection for the Z 8401 and Z 8701 engines.

• Fuel system: Injection pump removal and installation, injection timing, governor and injector adjustment, double fuel filter service, and troubleshooting.

• Drivetrain: Clutch and gearbox overhaul, torque multiplier brake-band adjustment, PTO shaft clutch service, and differential lock and bevel-gear setup.

• Axles: Front axle extensions, front drive axle clutch and distributor, rear final drives, and model-specific bevel-pinion removal procedures.

• Hydraulics and steering: Multi-control hydraulic power lift adjustment, pulse comparator service, micropump and slave cylinder repair, and power-assisted steering tests.

• Brakes: Foot and hand brake adjustment, master-cylinder service and bleeding, plus air compressor repair and pneumatic trailer brake valve procedures.

• Electrical diagnosis: Alternator and voltage regulator fault isolation, starter bench testing, battery master-switch service, and model-specific wiring diagrams.

The manual is intended for tractor users, repairers, and authorized repair-shop staff with a good knowledge of tractor maintenance and components; disassembly and repair work requires special assembly tools.

Engine Repair, Lubrication, and Cooling

Engine data covers critical tolerances for cylinder liners, valve clearance adjustments, piston and ring classifications, and bearing repair tables. Cylinder-head tightening-sequence drawings, crankshaft dimension charts, and exploded assembly views support the overhaul procedures. Torque values are listed in both Nm and kpm.

The centrifugal oil cleaner and oil pump sections include disassembly and troubleshooting. The manual warns that mismatched or misaligned oil-cleaner rotor halves can upset balance and damage the assembly.

Air-cleaner service accompanies radiator, water-pump, and thermostat housing work. The 12011/12045 sections also cover gearbox oil cooling and the engine oil heat exchanger.

Fuel Injection and Governor Service

Fuel system sections explain injection pump timing, injector pressure settings, and governor regulation principles. Separate MOTORPAL setting tables cover the four- and six-cylinder injection units.

The adjustment data applies to MOTORPAL test benches. When another bench type is used, the manual requires reference values established with a new or correctly adjusted injection unit.

Gearbox, PTO, and Axle Repair

Gearbox housing and shaft service covers the standard 8-forward/4-reverse transmission and the 16-forward/8-reverse version with a torque multiplier. Optional dependent-PTO service applies to the 8011/12011; front drive axle procedures cover the 8045/12045.

Transmission hydraulic-circuit checks separate minipump, distributor, torque multiplier, PTO clutch, and front drive clutch faults. These tests help locate pressure loss before selecting an assembly for repair.

Bevel-pinion and crown-wheel setup includes shim-thickness calculations and sectional drawings. The torque multiplier checks also explain how incorrect brake-band adjustment can overheat clutch plates and damage seals.

Hydraulic Lift, Steering, and Chassis

Hydraulic coverage distinguishes the main gear pump from the auxiliary micropump and slave cylinder used on the 8045/12011/12045. Position, draft, and mixed control are covered; pressure control is described as optional and not yet in series production in this edition.

Power-assisted steering repair includes bleeding, pressure testing, and leak checks. Chassis sections address the three-point hitch, safety cab, hot-water cab heating, and trailer hitches.

Working on heavy agricultural machinery involves significant physical hazards. Ensure proper equipment stabilization before starting any teardown.

Electrical Tests and Circuit References

Starter procedures distinguish the 12 V units on the 8011/8045 from the 24 V starting arrangement on the 12011/12045, including the series/parallel battery master switch.

Illustrations include the alternator internal circuit, starter test connection, battery master-switch wiring, and tractor/cab wiring diagrams. The Transmission Hydraulic Circuits and Tractor Hydraulic Power Lift System Scheme drawings support the hydraulic checks.

Workshop Tools and PDF Contents

Troubleshooting tables connect symptoms with possible causes and remedies. Factory tool references include tractor-splitting truck 80.801.169, clutch-centering mandrel 80.801.120, and transmission hydraulic test set 86.801.501.

The printable English manual is a single 176-page PDF: one cover, one blank page, four contents pages, 166 pages of foreword and workshop content, one bearing and shaft-seal list page, and three assembly-tool list pages with the publication details. All are included in the total.