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Complete workshop & service manual with electrical wiring diagrams for Caterpillar 3408, 3408B, 3412 Engines. It’s the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.
This Caterpillar 3408, 3408B, 3412 Diesel Engines service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. The printer-ready PDF documents work like a charm on all kinds of devices.
MODELS COVERED:
ENGINE – GENERATOR SET
Model Prefix
3408 GEN SET ENGINE 78Z
3408B GEN SET ENGINE 2BG
3408B GEN SET ENGINE 78Z
3408C GEN SET ENGINE 78Z
ENGINE – INDUSTRIAL
Model Prefix
3408 INDUSTRIAL ENGINE 67U
3408 REMAN ENGINE BFF
3408 REMAN ENGINE DLA
3408B INDUSTRIAL ENGINE 67U
3408B INDUSTRIAL ENGINE 9TD
3408B REMAN ENGINE BFD
3408C INDUSTRIAL ENGINE 9ER
3408C INDUSTRIAL ENGINE 9XM
3408E INDUSTRIAL ENGINE 7PR
3408E REMAN ENGINE BKY
3408E REMAN ENGINE ECP
ENGINE – MACHINE
Model Prefix
3408 ENGINE – MACHINE 1EM
3408 ENGINE – MACHINE 48W
3408 ENGINE – MACHINE 67U
3408 ENGINE – MACHINE 77M
3408C ENGINE – MACHINE 48W
3408E ENGINE – MACHINE 48W
3408E ENGINE – MACHINE 5XD
3408E ENGINE – MACHINE 99C
ENGINE – TRUCK
Model Prefix
3408 TRUCK ENGINE 28V
3408B TRUCK ENGINE 28V
MARINE PRODUCTS
Model Prefix
3408 MARINE ENGINE 99U
3408B MARINE ENGINE 1LG
3408B MARINE ENGINE 8RG
3408B MARINE ENGINE 99U
3408C GENERATOR SET TAM
3408C MARINE ENGINE 1TS
ENGINE – GENERATOR SET
Model Prefix
3412 GEN SET ENGINE 2WJ
3412 GEN SET ENGINE 81Z
3412 GENERATOR SET DK6
3412 GENERATOR SET TGC
3412 GENERATOR SET XJ5
3412C GEN SET ENGINE 81Z
3412C GEN SET ENGINE BAK
3412C GEN SET ENGINE BAX
3412C GENERATOR SET 4BZ
3412C GENERATOR SET 9EP
3412C GENERATOR SET BCW
3412C GENERATOR SET DJN
3412C GENERATOR SET LRY
3412C GENERATOR SET PTL
3412C GENERATOR SET TFT
3412C GENERATOR SET TWL
ENGINE – INDUSTRIAL
Model Prefix
3412 INDUSTRIAL ENGINE 38S
3412 INDUSTRIAL ENGINE 9XF
3412 REMAN ENGINE BKS
3412 REMAN ENGINE BLJ
3412C INDUSTRIAL ENGINE 8AR
3412C INDUSTRIAL ENGINE BCS
3412C REMAN ENGINE B1A
3412E INDUSTRIAL ENGINE 4CR
3412E INDUSTRIAL ENGINE BDT
3412E INDUSTRIAL ENGINE BFT
3412E REMAN ENGINE BNF
ENGINE – MACHINE
Model Prefix
3412 ENGINE – MACHINE 38S
3412 ENGINE – MACHINE 73W
3412D ENGINE – MACHINE 5JJ
3412E ENGINE – MACHINE 1KR
3412E ENGINE – MACHINE 5JJ
3412E ENGINE – MACHINE 80M
3412E ENGINE – MACHINE KPH
MARINE PRODUCTS
Model Prefix
3412 MARINE ENGINE 3JK
3412 MARINE ENGINE 5RL
3412 MARINE ENGINE 60M
3412 MARINE ENGINE 7BL
3412 MARINE ENGINE 7HG
3412C GENERATOR SET RLR
3412C GENERATOR SET RTY
3412C MARINE ENGINE 9BR
3412D MARINE ENGINE REA
3412E MARINE ENGINE 9KS
3412E MARINE ENGINE 9PW
PETROLEUM PRODUCTS
Model Prefix
3412E PETROLEUM ENGINE Z2D
MANUAL LIST:
KENR9511 – Schematic (Marine Multi-Station Control System II Electrical System)
RENR7893 – Schematic (Marine Multi-Station Control System Electrical System)
RENR7929 – Schematic (Marine Multi-Station Control System Electrical System)
SEBU6728 – Operation & Maintenance Manual (3408 & 3412 Diesel Marine Propulsion Engine)
SENR2623 – Disassembly & Assembly (3408 Vehicular Engine For 988B Wheel Loader)
SENR5518 – Schematic (3408 & 3412 High Performance Marine Engine)
SENR5534 – Disassembly & Assembly (3408 & 3412 High Performance Marine Engines)
SENR7321 – Disassembly & Assembly (3408 Vehicular Engine For 988B Wheel Loader)
SENR7382 – Disassembly & Assembly (3408 & 3408B Industrial & Marine Engines)
90050E14 – Grupo Electrógeno 3412 PGAI Servicio de Emergencia 900 kVA.pdf
SEBU5415 – Operation & Maintenance Manual (3408 & 3412 Industrial & EPG Diesel Engines).pdf
SEBU6945 – Operation & Maintenance Manual (3408 & 3412 Industrial & EPG Diesel Engines).pdf
SENR4642 – Systems Operation (3408 Vehicular Engine).pdf
SENR4642 – Testing & Adjusting (3408 Vehicular Engine).pdf
SENR4657 – Schematic (3412 Industrial Engines).pdf
SENR6478 – Schematic (3412 Genrator Set Engine).pdf
SENR7381 – Systems Operation (3408 & 3408B Industrial & Marine Engines).pdf
SENR7381 – Testing & Adjusting (3408 & 3408B Industrial & Marine Engines).pdf
…
EXCERPT:
Testing Fuel Injector Nozzles
The injectors must be off of the engine before being tested.
Note: Refer to Special Instruction, SEHS7292, “Use Of 5P-4150 Nozzle Assembly” for more information.
Fuel Injection Lines
Fuel from the fuel injection pumps is sent through the fuel injection lines to the fuel injection valves.
Each fuel injection line of an engine has a special design. Each fuel injection line must be installed in a certain location. When fuel injection lines are removed from an engine, put identification marks or put tags on the fuel lines as the lines are removed. This will allow the lines to be installed in the correct location.
The nuts that hold a fuel injection line to an injection valve and to an injection pump must be kept tight. Tighten the fuel line nuts to 40 ± 7 N·m (30 ± 5 lb ft).
Fuel Bypass Valve
The fuel bypass valve controls fuel pressure to the fuel injection pump. At full speed, the pressure is limited to 230 ± 35 kPa (33 ± 5 psi).
Finding the Top Center Position for No. 1 Piston
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Check Set Point (Balance Point)
An engine relies on set point for the correct operation of the engine. The set point check
of the engine is a method that will diagnosis engine performance.
There is a new, more accurate method for checking the set point of the engine. Review
the required tools for the new method. If these tools are not available, you can use an
alternative method for checking set point.
…
Engine Protection Devices
Shutoff and Alarm Systems
Shutoff and alarm systems are either electrically or mechanically operated. The operation of all electric shutoffs and alarms utilize components which actuate switches in a sensing unit.
Shutoff switches are set at a more critical operating temperature, pressure, level or speed than the alarm components. A shutoff switch opens or closes the circuit to the fuel shutoff solenoid. Opening the circuit to the fuel shutoff solenoid moves the fuel rack to the FUEL OFF position. The particular shutoff may require resetting before the engine will start.
When any sensing switch shuts the engine down, the problem causing the shutdown must be corrected before attempting to restart the engine.
Familiarize yourself with the:
* types and locations of the shutoff controls
* conditions which cause each control to function
* resetting procedure required to restart your engine
Alarm switches consist of a sensor and contactor. Examples of sensors are the magnetic pickup for detecting speed, and the pressure and temperature sensors. Sensors are wired to contactors. The contactors activate alarm circuits in the Annunciator Panel.
Alarm switches are set at a less critical operating temperature, pressure, level, or speed than the shutoff components. The purpose of the alarm switches is to warn the operator that an unsafe operating condition is beginning to occur.
When an alarm is activated, corrective measures must be taken, before the situation becomes an emergency, to avoid possible engine damage.
If corrective measures are not taken within a reasonable time, engine damage could result. Alternatively, a corresponding shutdown device (if equipped) will stop the engine.
The alarm will continue until the condition is corrected or the alarm is reset by the operator. The alarm circuits merely warn the operator, they do not shut the engine down to protect it from damage.
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