Model View Illustrations
The following model views show typical features of the engine and the aftertreatment system. Due to individual applications, your engine, and your aftertreatment may appear different from the illustrations.
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| Illustration 1 | g06242814 |
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Left side of generator set (1) Access to the DEF tank (2) Access to the engine (3) Access to the voltage selector switch (4) Fuel supply from external tank (5) Fuel return to external tank (6) Engine oil drain (7) Coolant drain | |
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| Illustration 2 | g06242817 |
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Right side of generator set | |
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| Illustration 3 | g06242831 |
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Rear of generator set (8) Access to outlets (9) Access to the control panel (10) Emergency stop button | |
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| Illustration 4 | g03404422 |
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Typical example (1) Front lifting eye (2) Crankcase breather (3) Secondary fuel filter (4) Primary fuel filter (5) Electronic Control Module (6) Priming/tranfer fuel pump (7) In line fuel filter (8) Oil level gauge (dipstick) (9) Oil drain plug (10) Oil filter (11) Oil sampling valve (12) High-pressure fuel pump (13) Oil filler | |
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| Illustration 5 | g03404423 |
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Typical example (14) Air intake (15) Coolant outlet (16) Water pump (17) Coolant intake (18) Tensioner (19) Belt | |
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| Illustration 6 | g03404515 |
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Typical example (20) Back pressure valve (21) High-pressure turbocharger (22) Low-pressure turbocharger (23) Alternator (24) Refrigerant compressor (25) Starter solenoid (26) Starting motor (27) Starter relay (28) Oil drain tap (29) Flywheel (30) Flywheel housing (31) NOx reduction cooler (32) Rear lifting eye | |
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| Illustration 7 | g03416433 |
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Diesel Oxidation Catalyst (DOC) and Selective Catalytic Reduction (SCR) (1) SCR (2) Identification module (3) Outlet for Exhaust gas (4) Mixer (5) DOC (6) Inlet for Exhaust gas | |
For a general description of the aftertreatment refer to this Operation and Maintenance Manual, "Product Description" for more information.
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| Illustration 8 | g03700576 |
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Diesel Exhaust Fluid (DEF) System (1) DEF tank and header unit (2) DEF filler cap (3) Pump electronic unit (4) DEF filter (5) NOx sensors and controls (6) Coolant control valve (7) Ammonia sensor (8) Control for ammonia sensor (9) DEF heated line | |
Caterpillar Information System:
XQ125 Generator Set Safety Messages
320GC, 320 and 323 Excavators Machine Systems Window Wiper Motor - Remove and Install
320GC and 320 Excavator Engine Supplement Temperature Sensor (DPF) - Remove and Install
320GC and 320 Excavator Engine Supplement Temperature Sensor (Cooled Exhaust Gas) - Remove and Install
336, 336 GC and 340 Excavator Systems Bucket System
G3500H 50Hz Generator Sets Sound Information
336, 336 GC and 340 Excavator Systems Stick System
336, 336 GC and 340 Excavator Systems Main Control Valve
320GC and 320 Excavator Engine Supplement Pressure Sensor (Cooled Exhaust Gas) - Remove and Install
320GC and 320 Excavator Engine Supplement Soot Antenna - Remove and Install
320GC Excavator Engine Supplement Hood - Remove and Install
PM820, PM822, and PM825 Cold Planer Machine Systems Hydraulic Cylinder (Rear Door) - Remove and Install
Installation and Initial Start-Up Procedure for G3500 TA Engines {0374, 1000, 7000} Installation and Initial Start-Up Procedure for G3500 TA Engines {0374, 1000, 7000}
XQ125 Generator Set Starting Motor - Inspect
320GC and 320 Excavator Engine Supplement Turbocharger - Remove and Install - First Stage
® Marine Display Display Setup - CMD5
Electric Starters May be Incorrectly Configured as Primary on Certain Cat® Generator Sets {1453, 1920} Electric Starters May be Incorrectly Configured as Primary on Certain Cat® Generator Sets {1453, 1920}
XQ125 Generator Set Engine Oil and Filter - Change
Excessive Radiant Heat May Cause Melting of Components on Certain DG30 Generator Sets {1067, 1408} Excessive Radiant Heat May Cause Melting of Components on Certain DG30 Generator Sets {1067, 1408}
320GC and 320 Excavator Engine Supplement Turbocharger - Remove and Install - Second Stage
C27 and C32 Engine for MD6250 and MD6310 Drill Injector Solenoid - Test
794 AC Off-Highway Truck Engine Supplement Engine - Remove
794 AC Off-Highway Truck Engine Supplement Engine - Install
XQ125 Generator Set Cooling System Coolant (ELC) - Change