PIN AS 5V1509 - Caterpillar

Magneto
In order to perform a test of the magneto on the engine, check the condition (intensity) of the spark at the spark plug. Perform a test of the magneto when the magneto is off of the engine. This test can be used to find a defect in the electrical components. A magneto test bench is used to perform the tests.Finding The Piston Top Center Position For The No. 1 Piston On The Compression Stroke
9S-9082 Engine Turning Tool Start all timing adjustments for the engine with the No. 1 piston on the top center compression stroke.
Illustration 1 g00580752
Timing Cover (1) Cover. (2) Cover.
Remove the cover (1) for the timing pointer from the right side of the flywheel housing.
Remove cover (2). Use the 9S-9082 Engine Turning Tool to turn the flywheel in the direction of engine rotation. Turn the flywheel so that the No. 1 piston is on the top center compression stroke. There will be 0 degrees on the flywheel.Note: Check the 0 degree mark on the flywheel. Compare this mark to the pointer in the flywheel housing. If the mark has turned past the pointer, the flywheel must be adjusted. The flywheel must be turned 30 degrees in the clockwise direction. Repeat Step 2. This will prevent timing errors that may be caused by play in the timing gears.
Remove the left front valve cover. Look at the valves of the No. 1 cylinder. The valves will be closed if the No. 1 piston is on the compression stroke. You should be able to move the rocker arms up and down with your hand. If the No. 1 piston is not on the compression stroke, go on to Step 4.
Illustration 2 g00600511
Flywheel Timing Marks
The intake valves and the exhaust valves for the No. 1 cylinder should be closed. If these valves are open, turn the flywheel in the direction of engine rotation. The flywheel must be turned 360 degrees. If both valves are now closed, this is the piston top center position.Note: Check the 0 degree mark on the flywheel. Compare this mark to the pointer in the flywheel housing. If the mark has turned past the pointer, the flywheel must be adjusted. The flywheel must be turned 30 degrees in the clockwise direction. Repeat Step 4. This will prevent timing errors that may be caused by play in the timing gears.Timing Of Magneto To Engine
Turn the crankshaft in the direction of engine rotation until the No. 1 piston is coming up on the compression stroke. Refer to Finding Piston Top Center Position For The No. 1 Piston On The Compression Stroke.
Turn the crankshaft until the desired timing mark is directly under the flywheel pointer. Refer to the Engine Performance Book, "Fuel Usage Guide" .
Remove the timing bolt (1) when the magneto is off of the engine. Rotate the magneto drive until the yellow mark on the gear is in the center of the hole.
Illustration 3 g00580800
Fairbanks Morse Magneto (1) Timing bolt.
Position the drive slots for the magneto in the proper position