Operation and Test Manual (TM14799X019) provides operating checks, diagnostic procedures, and system testing information for 2154G Forestry Excavator. Coverage includes machines with Product Identification Numbers (PIN) starting from 1FF2154G__F212700.
Operation and test sections help quickly identify the majority of routine failures through structured checks, theory of operation, system diagrams, and test procedures. Information is organized by machine systems and components, allowing technicians to efficiently verify operation and perform diagnostic tests during troubleshooting.
This manual includes electrical circuit diagrams, hydraulic diagrams, diagnostic trouble codes (DTCs).
For mechanical repair and service procedures, refer to Repair Manual TM14800X019.
Detailed engine and fuel system service procedures are not included in this manual and are provided in the following dedicated technical manual: CTM120019.
Main Controller (MCZ) Diagnostic Trouble Codes
Cab Control Module (CCM) Diagnostic Trouble Codes
Attachment and Light Controller (ALC) Diagnostic Trouble Codes
Attachment Controller (ACM) Diagnostic Trouble Codes
Flex Power Controller (FPC) Diagnostic Trouble Codes
Engine Control Unit (ECU) Diagnostic Trouble Codes
Monitor Controller (DSZ) Diagnostic Trouble Codes
Information Controller (ICZ) Diagnostic Trouble Codes
Air Conditioner Controller (ACF) Diagnostic Trouble Codes
Operational Checkout Procedure
Engine
Theory of Operation
Diagnostic Information
Adjustments
Tests
Electrical System
System Information
System Diagrams
Sub-System Diagnostics
Monitor Operation
References
Power Train
Theory of Operation
Diagnostic Information
Hydraulic System
Theory of Operation
Diagnostic Information
Tests
Heating and Air Conditioning
Theory of Operation
Diagnostic Information
Tests
General
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