Overview
The AGCO Sisu Power 33, 44, 49, 66, 74, 84 and 98 Fourth Generation Engine Workshop Service Repair Manual provides technical information for inspecting, servicing, repairing and overhauling AGCO Power diesel engines. The documentation covers engine identification, construction, technical specifications, cylinder blocks, cylinder heads, crankshafts, pistons, valve mechanisms, timing gears, lubrication, cooling, fuel injection and engine electronic control systems.
Workshop repair coverage includes cylinder liner inspection and replacement, camshaft and valve servicing, crankshaft removal, connecting rod and piston repairs, flywheel and timing gear maintenance, lubricating oil pump servicing, turbocharger inspection, Common Rail fuel system components, exhaust gas recirculation (EGR) equipment and selective catalytic reduction (SCR) systems. The manual also contains tightening torques, component measurements, engine-specific repair differences and references to special workshop service tools.
Engine Types: AGCO Sisu Power 33, 44, 49, 66, 74, 84 and 98 – Fourth Generation.
Manual Details: English-language workshop service manual. Publication number listed: 8370 79492. Listed length: 114 pages.
Important Information: The seven engine types share many construction features, but component dimensions and certain repair instructions differ between engine versions. Unless otherwise stated, measurements are expressed in millimetres and apply at a component temperature of +20°C. Confirm the engine identification and use the applicable technical specifications before beginning repairs.
Table of Contents
AGCO Sisu Power 33, 44, 49, 66, 74, 84, 98 Fourth Generation Engine Manual
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01. Introduction and Engine Construction
- 1.1 Safety Instructions
- 1.2 Information for the User
- 1.2.1 Engine Type Designations
- 1.2.2 Location of the Engine Serial Number
- 1.2.3 Engine Electronic Control Unit Identification
- 1.2.4 Lifting the Engine
- 1.2.5 Starting the Engine After Major Maintenance
- 1.3 Engine Construction
- 1.3.1 Engine Construction Overview
- 1.3.2 General Technical Data
- 1.3.3 Cylinder Block
- 1.3.4 Flywheel Housing
- 1.3.5 Valve Mechanism
- 1.3.6 Cylinder Head
- 1.3.7 Crank Mechanism
- 1.3.8 Timing Gears
- 1.3.9 Lubrication System
- Oil Pressure Regulating Valve
- Oil Filter and Oil Cooler – Engine Types 33-74
- Oil Filter and Oil Cooler – Engine Types 84-98
- 1.3.10 Cooling System
- Thermostat
- 1.3.11 Air Intake System
- Cooled EGR System and EGR Cooler
- 1.3.12 Fuel System
- 1.3.13 SCR System
- SCR System Components and Functions
- 1.3.14 Engine Control System
- Engine Control System Service Tool
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02. Engine Specifications and Special Tools
- 2.1 Engine Technical Data
- 2.1.1 Cylinder Block
- 2.1.2 Cylinder Liners
- 2.1.3 Cylinder Head
- 2.1.4 Valves and Rocker Arms
- 2.1.5 Tappets and Push Rods
- 2.1.6 Camshaft
- 2.1.7 Crankshaft
- 2.1.8 Flywheel
- 2.1.9 Balancing Unit
- 2.1.10 Timing Gears
- 2.1.11 Connecting Rod
- 2.1.12 Pistons, Piston Rings and Pins
- 2.1.13 Lubrication System
- 2.1.14 Lubricating Oil Pump
- 2.1.15 Thermostat
- 2.1.16 Turbocharger
- 2.2 Tightening Torques
- 2.3 Special Workshop Tools
- Cylinder Block Service Tools
- Timing Gear and Flywheel Housing Tools
- Cylinder Head and Valve Mechanism Tools
- Crank Mechanism Tools
- Coolant Pump Service Tools
- Engine Control System Diagnostic Tools
- Maintenance and Troubleshooting Tools
- 2.4 Fluid Quality Requirements
- Lubricating Oil Quality Requirements
- Coolant Quality Requirements
- Diesel Fuel Quality Requirements
- Engine Control Terminal Diagrams
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03. Engine Maintenance, Disassembly and Repair
- 3.1 Cylinder Block
- Measuring Cylinder Liner Wear
- Removing and Installing Cylinder Liners
- Checking the Cylinder Block
- Changing Camshaft Bushings – Engine Types 33-49
- Changing Camshaft Bushings – Engine Types 66-98
- Camshaft Rear Plug and Oversize Bushing Installation
- 3.2 Flywheel Housing
- Flywheel Housing Installation
- Crankshaft Rear Oil Seal Replacement
- 3.3 Cylinder Head
- Cylinder Head Removal and Inspection
- Valve Removal and Installation
- Valve Guide Replacement
- Valve Seat Machining and Replacement
- Valve Grinding
- Cylinder Head Installation
- 3.4 Valve Mechanism
- Valve Mechanism Reconditioning
- Camshaft and Camshaft Gear Replacement
- Valve Clearance Adjustment
- 3.5 Crankshaft
- Crankshaft Removal and Inspection
- Crankshaft Gear Replacement
- Crankshaft Installation
- Crankshaft Hub
- Vibration Damper Inspection
- 3.6 Connecting Rods and Pistons
- Piston and Connecting Rod Removal
- Connecting Rod Bearing Replacement
- Connecting Rod Inspection
- Piston Ring Replacement
- Piston Inspection and Piston Pin Installation
- Piston and Connecting Rod Reassembly
- 3.7 Counterbalance Unit – Applicable Engine Configurations
- Counterbalance Unit Removal and Disassembly
- Counterbalance Unit Reconditioning
- Counterbalance Unit Installation
- 3.8 Flywheel
- Starter Ring Gear Replacement
- Flywheel Installation
- 3.9 Timing Gear Assembly
- Timing Gear Casing Removal and Installation
- Crankshaft Hub Installation
- Engine Power Take-Off Components
- Fan Drive Device
- 3.10 Lubrication System
- Oil Pressure Regulating Valve
- Lubricating Oil Pump Removal and Disassembly
- Lubricating Oil Pump Reassembly and Installation
- Piston Cooling Nozzles
- Oil Sump Gasket Installation
- Lubricating Oil Cooler Removal and Installation
- Closed Crankcase Ventilation Components
- 3.11 Cooling System
- Thermostat Inspection and Replacement
- Coolant Pump Reconditioning
- Coolant Pump Bearing Arrangements
- Cylinder Head Cooling Connection Components
- 3.12 Air Intake and Exhaust System
- Air Cleaner Inspection
- Intake and Exhaust Pipe Inspection
- Turbocharger Inspection and Installation
- Exhaust Gas Recirculation (EGR) System
- EGR Actuator and Related Components
- 3.13 Fuel System
- Fuel System Bleeding
- Fuel Feed Pressure Measurement
- Fuel Injector Inspection
- Injector Removal and Installation
- High-Pressure Fuel Pump Servicing
- Common Rail Components
- SCR System Maintenance
- SCR Supply Module and Related Components
- 3.14 Engine Control System
- Electronic Control Unit (ECU) Replacement
- Engine Control Wiring Sets
- Engine Control Sensors
Fourth Generation Engine Workshop Repair Information
The AGCO Sisu Power Fourth Generation engine documentation provides technical references for cylinder head repairs, crankshaft and piston overhaul, fuel injection system servicing, turbocharger inspection, lubrication and cooling systems, and electronic engine controls. Engine-specific specifications, tightening torques and special tool information assist technicians when repairing compatible AGCO Power 33, 44, 49, 66, 74, 84 and 98 diesel engines.
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