HOUSING GP-FLYWHEEL 3254344 - Caterpillar

Shielded Standard Counterclockwise Rotation
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Wiring diagram for shielded standard counterclockwise rotationShielded Opposite Clockwise Rotation
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Wiring diagram for shielded opposite clockwise rotation Install the Magneto
Remove the cover from the flywheel housing in order to observe the timing marks on the flywheel.
Refer to Table 4 in order to determine the initial ignition timing.
Table 4
Recommendations for Initial Ignition Timing    
Compression Ratio     Aspiration     Aftercooler's Rating     Fuel     Degrees Before Top Center    
10:1     Natural aspiration     -     Dry, processed natural gas     30    
10:1     Turbocharged aftercooled    
32 °C (90 °F)     20
10:1     Turbocharged aftercooled     -     Propane     10    
10:1     Natural aspiration     -     Propane     15    
7:1     Dry, processed natural gas 30    
7:1     Turbocharged aftercooled    
54 °C (130 °F)    
7:1     Natural aspiration     -     Unprocessed field gas     20    
Butane
7:1     Turbocharged aftercooled     -     Propane    
Scrubbed field gas
Illustration 17 g00735090
Flywheel timing marks
Turn the crankshaft in the direction of engine rotation until the number 1 piston is coming up on the compression stroke. Place that piston in the position that was determined from Table 4. Observe the timing marks on the flywheel and turn the crankshaft until the desired timing mark on the flywheel is directly under the pointer for the timing marks on the flywheel.The number 1 cylinder is the first piston in the firing order for clockwise rotation and for CCW rotation.Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston". Also observe the direction that the pointer on the magneto moves.Note: The magneto has two marks that indicate the rotation of the magneto ("CW" and "CCW"). The magneto also has a pointer that moves clockwise or counterclockwise when the magneto's coupling is rotated. When you time the magneto to the engine, the pointer must indicate the correct timing mark.
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Marks for the direction of rotation and pointer on the magneto
Rotate the magneto's coupling and observe the pointer on the magneto. Align the pointer on the magneto with the appropriate mark for the direction of rotation.For engines with standard rotation, align the pointer with the "CCW" mark.For engines with opposite rotation, align the pointer with the "CW" mark.When the desired timing mark on the flywheel is obtained, the pointer on the magneto must be aligned with the appropriate mark.
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(1) Lugs on the magneto's coupling (2) Magneto drive's shaft (3) Original mounting bolt (4) 5M-2894 Hard Washer (5) 7C-4462 Harness
Verify that lugs (1) on the magneto's coupling are approximately at the 12 o'clock and 6 o'clock positions. Observe the corresponding positions of the slots in the magneto drive's shaft (2). If the slots do not align with the lugs, pull the shaft away from the magneto drive in order to rotate the shaft to the correct orientation. Push the shaft back into the magneto drive.
Keep the pointer on the magneto aligned with the appropriate mark