Related Manuals for QUANCHAI N490D
Summarization of Contents
Chapter 1 Safety Precautions
Scald proof sign
Keep personnel away from hot engine parts to prevent burns.
Anti-touch sign
Prohibits touching hot engine parts during operation; repair after downtime.
Engine lifting equipment
Guidelines for using proper lifting equipment and checking lifting rings.
Chapter 2 Technical Parameters
Main technical parameters
Lists key specifications for N485D and N490D diesel engines.
Torque
Provides torque values for various engine bolts and assembly points.
Exposed parts of the engine
Identifies major engine components on the left and right sides with labels.
Chapter 3 Fuel and Engine Oil
Use of and precautions of fuel
Details proper fuel storage, handling, and selection based on temperature.
Engine lubricating oil
Specifies oil quality levels and viscosity grades based on ambient temperature.
Chapter 4 Product Features and Accessories
Standard accessories for the product
Lists standard components included with the diesel engines.
Chapter 1 Disassembly and Assembly of Valve Train
Maintenance equipment and tools
Lists special tools required for valve train maintenance.
Disassembly of valve train
Step-by-step instructions for disassembling cylinder head cover, rocker arms, and manifolds.
Assembly of valve train
Procedures for reassembling intake/exhaust valves, manifolds, and cylinder head.
Chapter 2 Disassembly and Assembly of Crank Linkage Mechanism
Torque requirements and dimensional data
Specifies torque values for connecting rod and main bearing bolts.
Disassembly of connecting rod
Instructions for removing connecting rod bolts, cap, and bearing shell.
Assembly of connecting rod bushing
Details the inspection and installation process for connecting rod bushings.
Chapter 3 Cooling System
Disassembly, assembly and adjustment of cooling parts
Outlines composition and disassembly of cooling system parts like fan and pump.
Assembly and adjustment of cooling parts
Guides for installing the water pump assembly and other cooling system parts.
Chapter 4 Lubrication System
Disassembly of the lubrication parts
Steps for disassembling and installing the engine oil pump assembly.
Chapter 5 Starting System
Disassembly, assembly and adjustment of starting parts
Procedures for disassembling, assembling, and adjusting the starter motor.
Chapter 6 Fuel supply system
Disassembly and assembly of fuel supply system
Instructions for assembling high-pressure fuel pipes, injectors, and diesel filters.
Chapter 7 Disassembly, Assembly and Adjustment of Accessories
Disassembly and assembly of gear chamber
Explains the process of disassembling and assembling gears in the gear chamber.
Chapter 1 Dynamic Checks
Checks on engine oil level
Procedures for checking and maintaining the engine's oil level.
Checks on level and status of coolant
Guidelines for checking coolant level, quality, and system leaks.
Checks on fan and belt
Instructions for inspecting the fan and checking the water pump belt tension.
Chapter 2 Working Mechanism
Valve train
Explains the functions and operation of the engine's valve train system.
Crank linkage mechanism
Describes the function and components of the crank linkage mechanism.
Chapter 3 Inspection and Adjustment
Valve clearance (mm)
Details the procedure for inspecting and adjusting valve clearances.
Cylinder pressure
Explains how to test cylinder compression pressure and identify issues.
Test on engine oil pressure
Provides steps for testing engine oil pressure and interpreting results.
Chapter 4 Fault Diagnosis and Removal
Emission of white smoke
Identifies causes and solutions for white smoke emission from the engine.
Emission of black or gray smoke
Lists potential causes and remedies for black or gray smoke.
Cylinder compression pressure being insufficient
Diagnoses and addresses issues related to low cylinder compression.
Abnormal sound emitted by diesel engine
Helps identify engine problems based on abnormal sounds produced.
Low power
Diagnoses and resolves issues causing the engine to have low power output.
Failure of engine to be started
Provides troubleshooting steps for when the engine fails to start.
Failure of starter to work
Guides on diagnosing and fixing starter motor malfunctions.
Hard to get diesel engine started
Addresses common problems that make starting the diesel engine difficult.
Emission of black smoke
Explains how to diagnose and fix issues causing black smoke.
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