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Complete workshop & service manual with electrical wiring diagrams for Caterpillar 3408C, 3412C, 3412D Engines. It’s the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.
This Caterpillar 3408C, 3412C, 3412D 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.
MANUAL LIST:
RENR1389 – Disassembly & Assembly (3412C Generator Set Engine)
SENR1095 – Disassembly & Assembly (3408C & 3412C Marine Engines)
SENR1147 – Specifications (3408C and 3412C Marine Engines)
SENR5516 – Specifications (3408C, 3412C & 3412D High Performance Marine Engines)
SENR5517 – Systems Operation (3408C, 3412C & 3412D High Performance Marine Engines)
SENR5517 – Testing & Adjusting (3408C, 3412C & 3412D High Performance Marine Engines)
SENR7380 – Specifications (3408B & 3408C Industrial & Marine Engines)
KENR8699 – Schematic (3412C Generator Set with EMCP 3 Electrical System).pdf
SEBU6497 – Maintenance Intervals (3408C, 3412, 3412C & 3412D High Performance Marine Engines).pdf
SEBU6497 – Operation & Maintenance Manual (3408C, 3412, 3412C & 3412D High Performance Marine Engines).pdf
SENR1133 – Disassembly & Assembly (3408C & 3412C Marine Engines).pdf
SENR1148 – Systems Operation (3408C & 3412C Marine Engines).pdf
SENR1148 – Testing & Adjusting (3408C & 3412C Marine Engines).pdf
EXCERPT:
Individual fuel injection lines carry fuel from the fuel injection pumps to each cylinder. One section of line connects between the fuel injection pump and an adapter on the valve cover base. Another section of line on the inside of the valve cover base connects between the adapter and the fuel injection nozzle (3).
The fuel filters and priming pump are located in a compartment at the front of the fuel tank. The fuel transfer pump is mounted on a drive adapter on the fuel injection pump housing, and is driven by a shaft connected to the fuel injection pump camshaft. Fuel transfer pump relief valve (14) is located in the cover of the pump.
Fuel priming pump (13) is used before the engine is started to put pressure in the fuel system and to vent air from the system. A check valve (9) located in the fuel transfer pump adapter housing will let fuel go around the fuel transfer pump when the priming pump is in use.
There is no bleed orifice or valve installed on the fuel injection pump housing to vent air from this part of the fuel system. Air trapped in the fuel injection lines can be vented by loosening all of the fuel injection line nuts where they connect to the adapters in the valve cover base. Move the governor lever to the low idle position. Crank the engine with the starting motor until fuel without air comes from the fuel line connections. Tighten the fuel line nuts. This procedure is necessary because the fuel priming pump will not give enough pressure to push fuel through the reverse flow check valves in the fuel injection pumps of a direct injection system.
An automatic timing advance unit is mounted on the front of the fuel injection pump camshaft. It is driven by the engine camshaft gear inside the front timing gear housing. The automatic timing advance unit gives easier starting and smooth low speed operation. It will also advance timing as engine speed increases to give correct engine operation efficiency.
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