KIOTI EX35, EX35C, EX40, EX40C, EX45, EX45C, EX50 & EX50C 2008 Tractor Workshop Manual (P/N DH20-W00)

• Coverage and document identity: 740-page PDF of the KIOTI/Daedong factory workshop manual, document code DH20-W00, dated July 2008, covering EX35/EX35C, EX40/EX40C, EX45/EX45C, and EX50/EX50C tractors with mechanical or HST drivetrains in ROPS and cab configurations.
• Engine repair: Separates 3B183 and 4B243 B-series engines from 4A200 and 4A220 A-series engines, with removal, internal inspection, fuel-system service, timing work, and lubrication/cooling tests.
• Clutch and transmission work: Covers clutch inspection and installation, synchronized shuttle/main/range gearing, optional creep and mid-PTO components, tractor splitting, internal reassembly, detent-ball jig use, and PTO service.
• HST diagnosis: Details the Kanzaki KHS-42 JAS unit, charge and high-pressure circuits, neutral and servo controls, pressure testing, pedal/cruise adjustment, air bleeding, removal, and component repair.
• Chassis and hydraulics: Documents differential setup, wet multi-plate brake repair, steering tests and unit teardown, plus gear-pump, joystick, remote-valve, MLS, modulator, three-point hitch, and lift-cylinder procedures.
• Electrical, cab, and A/C systems: Provides configuration-specific wiring, circuit-test methods, ignition/charging/preheat/PTO/cruise analysis, cab-body disassembly, and R-134a A/C diagnosis with compressor, receiver-drier, and condenser service.
• Workshop references: Includes 146 named exploded-view pages, schematics, troubleshooting tables, torque data, pressure-test specifications, fluid requirements, electrical checks, adjustment data, and wear limits.

Technical Documentation and Subsystems

This July 2008 Kioti EX35-EX50 workshop manual is organized as a repair reference rather than a maintenance-only owner's guide. The general chapter identifies tractor, engine, and transmission numbers; model specifications; mechanical and HST gear arrangements; driving-speed and wheel-speed-ratio checks; maintenance data; torque tables; and KIOTI bolt and nut coding.

Repair chapters pair operating principles and fault isolation with measurements, adjustments, exploded views, and factory removal, installation, teardown, inspection, and reassembly procedures. Troubleshooting covers engine no-start and low-output complaints, shift and HST faults, axle and steering problems, hydraulic lift complaints, electrical failures, and poor cab heating or cooling.

Engine and Torque Specifications

Engine mapping is model-specific: EX35 uses the 3B183, EX40 the 4A200, EX45 the 4A220, and EX50 the 4B243. Separate A-series and B-series service-limit tables cover the cylinder head and valvetrain, timing gears, pistons and rings, connecting rods, crankshaft bearings, lubrication, cooling, fuel system, and major fasteners. Mechanical, HST, and AU-suffix engine codes are identified in the model tables.

The 4B243 section distinguishes the CTD injection-pump arrangement used on U.S./EU export applications from domestic/AU timing data. KIOTI also notes that mechanical and HST engine assemblies are common except for the flywheel, an important detail when matching a replacement engine to the transmission type.

Factory procedures include compression and valve-lift checks, valve adjustment, injection-timing measurement, oil-pressure testing, radiator bubble testing, and nozzle inspection. Internal repair reaches the cylinder head and valves, injection pump and nozzle holder, camshafts and timing gears, pistons, crankshaft and bearings, cylinder bore, oil pump, thermostat, and water pump.

Drivetrain, Hydraulic, Electrical, and Cab Coverage

The mechanical transmission chapter documents the synchronized shuttle, main and range sections, optional creep gearing, front-wheel-drive train, PTO clutch pack, rear PTO, and optional mid PTO. Procedures cover main-gear removal, countershaft and PTO-drive reinstallation, shuttle-case and range-section work, front-wheel-drive shaft service, and PTO-shaft repair. The HST chapter explains the charge pump, neutral and relief valves, servo control, and forward/reverse operation before pressure diagnosis, linkage adjustment, bleeding, removal, and internal service.

Rear- and front-axle chapters address differential preload, backlash, tooth contact, shimming, pinion-shaft work, and axle removal. Steering coverage adds relief testing, hose routing, cylinder repair, and steering-unit teardown. Hydraulic sections map the gear pump, suction filter, joystick and remote valves, MLS (Mita Load Sensing) valve, modulator valve, position/draft linkage, three-point hitch, and lift cylinder, with related tests and adjustments.

Four overall circuit diagrams separate HST/ROPS, HST/cab, mechanical/ROPS, and mechanical/cab configurations. Bonnet, panel, and fender wiring is backed by open-, short-, and ground-circuit tests plus analysis of ignition, charging, preheat, PTO, cruise, lighting, and instrument systems. Cab chapters cover body removal, doors, glass, roof, wipers, wiring, and control levers. The A/C chapter adds gauge-based diagnosis, system-flow information, compressor removal and installation, receiver-drier service, and condenser work.

Diagrams, Special Tools, and Workshop Cautions

Representative graphics include mechanical and HST gear arrangements, the engine oil-flow chart, coolant-flow route, steering-operation diagram, hydraulic schematic/circuit diagram, and configuration-specific overall electrical diagrams. Examples of the named exploded views include E110 piston/crankshaft, T195B HST parts, T525A front differential, T695B MLS valve, and T1155C A/C unit.

DAEDONG special tool kit G0611-B0010 is referenced for crankshaft rotation, clutch alignment, and transmission detent-ball work. Coupler 37805-4452-1 is identified as the basis for a crankshaft-turning socket.

Excess grease around the clutch release hub can contaminate the disc and shorten clutch life. Too much liquid gasket on transmission mating surfaces can damage the transmission and hydraulic system. During cylinder-head repair, the MLS gasket is a replace-only part, and the mating surfaces must remain clean and scratch-free.

The exploded views identify assemblies and component names, but they are not a current parts-ordering catalog; KIOTI directs users to the parts catalog or electronic manual for the latest production-part information. Tractor splitting, suspended component removal, high-pressure hydraulic tests, and A/C service require proper supports, pressure-rated test equipment, suitable service tools, and the manual's safety procedures.