G3606 and G3608 Engines Specifications Caterpillar


Specifications
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1.1. Engine Specifications
2.1. Drives and Gear Trains
3.2. Front Drives
4.2. Engine Front Gear Train
5.2. Engine Rear Gear Train
6.1. Reference Weights

Engine Specifications

Table 1
Engine Specifications 
  G3606  G3608 
Operating RPM  750 to 1000 
Low Idle RPM  550 
Cylinders and Arrangement  6 in-line block design  8 in-line block design 
Bore  300 mm (11.8 inch) 
Stroke  300 mm (11.8 inch) 
Aspiration  TA 
Compression Ratio  9.2:1
10.5:1
11:1 
Displacement per Cylinder  21.2 L (1294 in3) 
Total Displacement  127.2 L (7762 in3)  169.6 L (10350 in3) 
Mean Velocity of the Pistons at 900 RPM  9 m/s (1772 ft/min) 
Mean Velocity of the Pistons at 1000 RPM  10 m/s (1969 ft/min) 
Flywheel Rotation (Standard)  Counterclockwise 
Fuel  See this Operation and Maintenance Manual, "Refill Capacities and Recommendations" (Maintenance Section). Also, see the Application and Installation Guide. 
Method of Starting  Air starting motors 
Performance of the Cooling System  See the Application and Installation Guide. 
Maximum Allowable Exhaust Back Pressure  3 kPa (12 inches of H2O) 
Maximum Allowable Inlet Air Restriction  3.7 kPa (15 inches of H2O) 
Air Cleaners  Remote 
Valve Lash (Gas Admission Valve)(1)  0.64 mm (.025 inch) 
Inlet Valve Lash  0.50 mm (.020 inch) 
Exhaust Valve Lash  1.25 mm (.050 inch) 
(1) This measurement is for newer engines. For earlier engines, the valve lash is set by turning an adjustment screw and counting the “clicks”.


Illustration 1g01097715
G3606 Engine cylinder numbers
(A) Gas admission valves
(B) Inlet valves
(C) Exhaust valves


Illustration 2g01097719
G3608 Engine cylinder numbers
(A) Gas admission valves
(B) Inlet valves
(C) Exhaust valves

Drives and Gear Trains

Front Drives



Illustration 3g01097722
SAE standard engine crankshaft rotation
(1) Jacket water pump
(2) Aftercooler and oil cooler pump
(3) Oil pump


Illustration 4g01097724
SAE standard engine crankshaft rotation
(4) Water outlet
(5) Water inlet
(6) Oil outlet
(7) Oil inlet

Table 2
Front Drives  
Component  Speed(1) 
Jacket Water Pump  2522 
Aftercooler and Oil Cooler Pump  2522 
Scavenge Oil Pump  1627 
Oil Pump  1524 
(1) The speed of the component is listed for an engine that is operating at 1000 rpm. For an engine that is operating at 900 rpm, multiply the speed of the component by .9. For an engine that is operating at 800 rpm, multiply the speed of the component by .8.

Engine Front Gear Train



Illustration 5g01097726
SAE standard engine crankshaft rotation
(1) Crankshaft
(2) Idler
(3) Idler
(4) Jacket water pump
(5) Aftercooler and oil cooler pump
(6) Auxiliary pump
(7) Oil pump

Table 3
Front Gear Train 
Gear  Number Of Teeth 
(1) Crankshaft  96 
(2) Idler  68 
(3) Idler  67 
(4) Jacket Water Pump  38 
(5) Aftercooler and Oil Cooler Pump  38 
(6) Auxiliary Pump  43 
(7) Oil Pump  63 

Engine Rear Gear Train



Illustration 6g01097732
SAE standard engine crankshaft rotation
(1) Crankshaft
(2) Large cluster idler
(3) Small cluster idler
(4) Camshaft

Table 4
Rear Gear Train 
Gear  Number Of Teeth 
(1) Crankshaft  81 
(2) Large Cluster Idler  90 
(3) Small Cluster Idler  45 
(4) Camshaft  81 

Reference Weights

Table 5
Approximate Engine Weights 
Dry Weight of the Engine with Attachments  G3606  G3608 
15640 kg (34568 lb) 19000 kg (41888 lb) 

Table 6
Approximate Weights Of Serviceable Parts 
Component  G3606 Engine  G3608 Engine 
Cylinder Block  4638 kg (10225 lb)  6476 kg (14260 lb) 
Bearing Cap  65 kg (143 lb) 
Crankshaft  1782 kg (3929 lb)  2288 kg (5034 lb) 
Flywheel Assembly  491 kg (1082 lb) 
Crankshaft Vibration Damper  183 kg (403 lb)  267 kg (588 lb) 
Cylinder Head Assembly  196 kg (432 lb) 
Cylinder Liner  110 kg (243 lb) 
Piston Assembly  48 kg (100 lb) 
Piston Pin  19 kg (42 lb) 
Piston Rod Assembly  57 kg (126 lb) 
Turbocharger  401 kg (884 lb) 
Aftercooler Core(1)  52 kg (115 lb) 
Front Housing  258 kg (569 lb) 
Rear Housing  222 kg (489 lb) 
Used Air Cleaner Element  29 kg (64 lb) 
(1) The weight is listed for a single-stage aftercooler. A two-stage aftercooler and an aftercooler with a deep core are also available.

Table 7
Approximate Weights Of Package Generator Sets 
Item  G3606 Engine  G3608 Engine 
Engine(1)  15680 kg (34568 lb)  19000 kg (41888 lb) 
Generator(2)  8300 kg (18298 lb)  9400 kg (20723 lb) 
Generator(3)  8270 kg (18232 lb)  9400 kg (20723 lb) 
Module  1360 kg (2998 lb)  1410 kg (3109 lb) 
Mounting base(2)  7820 kg (17240 lb)  8640 kg (19048 lb) 
Mounting base(3)  8170 kg (18012 lb)  8640 kg (19048 lb) 
Coupling(3)  590 kg (1300 lb) 
Total(2)  33160 kg (73105 lb)  38450 kg (84768 lb) 
Total(3)  34070 kg (75111 lb)  39040 kg (86068 lb) 
(1) The weights of the engines that are listed includes attachments that are mounted on the engines. The engine weights are dry weights.
(2) Single bearing generator
(3) Double bearing generator

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