Specific Models:
309 Vario COM3, 310 Vario COM3, 311 Vario COM3, 312 Vario COM3
Chassis Code Series:
336 (309), 337 (310), 338 (311), 339 (312)
Engine Code Prefix:
COM3 (Common Rail Stage III / Tier 3)
Target User:
Professional Fendt service technicians, farm mechanics, and advanced tractor owners.
Value Proposition:
Provides in-depth technical knowledge essential for maintaining and repairing the Fendt Farmer Vario series.
Manual Type Comparison:
Surpasses owner's manuals by offering detailed repair and diagnostic procedures.
Comprehensiveness:
Covers a vast range of systems and procedures across multiple specific models.
Digital Utility:
Searchable PDF format facilitates quick access to information.
Technical Accuracy:
Expected to contain official Fendt technical data and procedures.
Engine Management:
Detailed diagnosis, component testing, sensor data, fuel system, emission control (COM3 standards).
Transmission System:
Fendt Vario (TMC) transmission operation, control systems, hydraulic components, repair procedures, calibration.
Hydraulic System:
Load sensing hydraulics, valve operation, pump specifications, cylinder repair, fluid flow, troubleshooting.
Electrical System:
Wiring diagrams, component locations, sensor/actuator diagnosis, ECU functions, lighting, instrumentation.
Cab Environment:
HVAC system diagnosis and repair, interior controls, operator interface, comfort features.
Powertrain Controls:
Integration of engine, transmission, and hydraulic control units for optimal performance and efficiency.
Braking System:
Hydraulic brake system components, parking brake, diagnostic procedures.
Power Take Off Pto:
Rear and optional front PTO engagement, speeds, maintenance.
Routine Maintenance:
Lubrication schedules, fluid changes (engine oil, transmission fluid, hydraulic fluid), filter replacements.
Troubleshooting:
Diagnostic flowcharts for common and uncommon issues across all major systems.
Component Overhaul:
Detailed instructions for the disassembly, inspection, repair, and reassembly of major components (engine, transmission, hydraulics).
Electrical Diagnostics:
Step-by-step procedures for diagnosing electrical faults using multimeters, oscilloscopes, and diagnostic tools.
System Calibration:
Procedures for calibrating the Vario transmission, PTO, and electronic control units.
Special Tool Usage:
Guidance on the correct application of specialized tools for specific service tasks.
Depth:
Comprehensive Workshop Level - Covers diagnostics, repair, overhaul, and calibration of all major vehicle systems.
Diagnostic Capability:
Advanced diagnostic procedures, including fault code interpretation and component-level testing.
Repair Procedures:
Detailed step-by-step instructions with diagrams for complex repair tasks.
Specifications:
Includes essential technical data such as torques, clearances, fluid capacities, and electrical parameters.
Engine Family:
Deutz TCD (Turbo Common Rail Diesel) or AGCO Power (depending on exact build date and region, but COM3 indicates emission standards of that era).
Emission Standard:
COM3 (Common Rail Stage III / Tier 3)
Displacement Range:
Typically 4.0L - 4.8L for these models, but varies by specific engine variant.
Fuel System:
High-pressure Common Rail (HPCR) with electronic fuel injection.
Horsepower Range:
Approx. 90 HP (309) to 120 HP (312), depending on model and specific tuning.
Torque Range:
Significant torque figures, crucial for agricultural applications, detailed in manual.
Injection System:
Bosch or similar advanced electronic injection system.
Type:
Fendt Vario Continuously Variable Transmission (CVT).
Configurations:
N/A (Vario is the defining feature)
Operation:
Infinitely variable speed control via joystick and pedals, automatic load management.
Control System:
Electronic control unit managing hydrostatic and mechanical power splitting.
Fluid Type:
Specific hydraulic fluid and transmission fluid, as detailed in the manual (e.g., AGCO Fluid 821 XL or equivalent).
Wheelbase:
Varies by model, typically around 2400-2500 mm. Exact figures in manual.
Operating Weight:
Approximately 4,500 - 5,500 kg. Exact figures in manual.
Max Gross Weight:
Significantly higher, allowing for ballast and heavy implements. Exact figures in manual.
General:
Designed to meet rigorous agricultural machinery safety standards (e.g., ISO standards for tractor safety).
Braking System:
Service brakes, parking brake, potential hydrostatic braking from Vario transmission.
Visibility:
Cab design focused on excellent all-around visibility.
Operator Protection:
ROPS (Roll-Over Protective Structure) certified cab.
Cab Features:
Basic controls, instrumentation for monitoring engine and transmission performance. Advanced infotainment not typical for this era/class.
Control Systems:
Electronic PTO control, draft control for rear linkage, cruise control functions integrated into Vario lever.
Diagnostics:
On-board diagnostics (OBD) port for fault code retrieval and system monitoring.
Engine Oil Change:
Typically every 500 or 1000 operating hours, depending on oil specification and operating conditions. Detailed schedule in manual.
Transmission Fluid Change:
Varies, often around 2000 operating hours for main hydraulic/transmission fluid. Specific intervals and filter changes are critical and detailed in manual.
Hydraulic Fluid Change:
Refer to transmission fluid change intervals; often the same fluid reservoir.
Engine Oil:
API CJ-4 or equivalent, SAE 15W-40 or 10W-40 depending on climate. Manual specifies exact Fendt or AGCO recommendations.
Transmission Hydraulic Fluid:
AGCO Fluid 821 XL or similar SHELL SPIRAX S4 TXME / CAT TO-4M compliant fluid. Critical to use correct specification for Vario.
Coolant:
Ethylene glycol based, long-life coolant (e.g., 50% water, 50% coolant). Capacity and type detailed in manual.
Common Wear Items:
Hydraulic filters, fuel filters, engine oil filters, air filters, cab filters.
Vario Transmission Maintenance:
Regular fluid and filter changes are paramount for Vario longevity. Early detection of any subtle transmission noise or behavior changes is important.
Common Faults:
Wiring harness issues, sensor failures (especially related to transmission and engine management), hydraulic leaks. Detailed troubleshooting in manual.
