FUEL SYSTEMLOCATING TOP CENTER COMPRESSIONPOSITION FOR NO. 1 PISTONNo. I piston at top center (TC) on the compressionstroke is the starting point for all timing procedures.NOTE: The engine is seen from the flywheel endwhen direction of crankshaft rotation is given.1. Remove the valve cover.2.3.Use a 1 1/8 inch socket on the front crankshaftpulley bolt and rotate the crankshaft clockwiseapproximately 30 degrees. The reason for thisstep is to be sure the free play is removed fromthe timing gears when the engine is put on topcenter.Remove the plug from the timing hole in theflywheel housing. Rotate the crankshaft until a3/8"- 16 NC bolt, 50.8 mm (2.00 in.) long, canbe turned into the flywheel through the timinghole in the flywheel housing. No. I piston is nowon top center.NOTE: If the crankshaft is turned beyond top centerdo Steps 2 and 3 again.4. The intake and exhaust valves for No. 1 cylinderwill be closed if No. 1 piston is on the compres-sion stroke. You can move the rocker arms upand down with your hand.5. If No. 1 piston is not on the compression stroke,remove the timing bolt and rotate the crankshaftcounterclockwise 360°. Install the timing bolt.The No. 1 piston is now at top center on thecompression stroke.TESTING AND ADJUSTINGTM 5-3805-263-14&P-2CHECKING TIMING BYFUEL FLOW METHODTools Needed:1P540 Flow Checking Tool Group5P6524 Engine Timing indicator Group9S215 Dial Indicator958883 Contact Point, 12.7 mm (.50 in.) long5P7266 Adapter3P1565 Collet6V2056 Rod, 130.00 mm (5.118 in.) long6V2057 Contact Point6V2023 Flow Checking AdapterMEASUREMENT OF PISTON TRAVEL1. 3P1565 Collet. 2. 9S215 Dial Indicator and 9S8883Contact Point.3. 5P7266 Adapter. 4. 6V2056 Rod,130.00 mm (5.118 in.) long. 5. Cylinder heed. 6. Inletport. 7. Piston.The fuel flow timing method is the most ac-curate method to check the timing of the engine.The distance of piston (7) from top center wheninlet port (6) just closes can be determined by theuse of the procedure that follows. Use the chartto find the conversion of dial indicator reading tocrankshaft degrees.NOTE: The fuel flow method CAN NOT be usedwith 3300 Series Direct Injection engines that have21 or more degrees BTC timing.NOTE: The fuel system timing has a tolerance of± 1°.1-45
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