VALVE AS-MAIN CONTROL 3042573 - Caterpillar

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(2) Rear bolt hole in the base of the cover
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(3) 147-5536 Indicator Contact Point . (4) Top edge of the valve bridge.
Install the 145-5191 Gauge Support in the rear bolt hole (2). The rear bolt hole is located in the valve cover base. Adjust the contact point (3) on the top edge of the valve bridge (4) .
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(5) Adjustment screw
Loosen the locknut for the adjustment screw. Loosen the adjustment screw (5) several turns.
Apply a force of 5 to 45 N (1 to 10 lb). Push down on the top contact surface of the valve bridge. Zero the indicator.
Turn the adjustment screw (5) clockwise until the dial indicator reads .038 mm (0.0015 inch). The correct measurement is equal to turning the adjustment screw 20 to 30 degrees after the screw contacts the end of the valve.
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(6) 148-7211 Bridge Nut Socket
Hold the adjustment screw with the 148-7211 Bridge Nut Socket (6) in order to tighten the locknut to 30 4 N (22 3 lb). You may use a torque computer in order to determine the torque wrench dial reading for the different extensions. Refer to the Special Instruction, SEHS7150, "Snap On Torque Computer" for additional information.Valve Lash Adjustment
Note: The 147-5482 Valve Lash Gauge Group cannot be installed on engines with the earlier 8N-8788 Fuel Manifold .Note: The valve bridges MUST be adjusted before making the valve lash adjustments.
Ensure that the number 1 piston is at the top center position. Refer to the Systems Operation, Testing And Adjusting, "Finding Top Center Position For No. 1 Piston" for additional information.
The number 1 piston should be at the top center position of the correct stroke. Make adjustments to the valves in accordance with the chart in the Systems Operation, Testing And Adjusting, "Crankshaft Positions For Fuel Injector Lash And Valve Lash Setting".Note: Tap each rocker arm on the top of the adjustment screw before making any adjustments. Use a soft hammer. Make sure that the lifter roller is seated against the base circle of the camshaft.Note: When you are using the 145-5191 Gauge Support to adjust the 3516 Diesel Engine that is installed in a 789 Off-Highway Truck, the knurled knob must be removed on the tool. The knurled knob must be removed when you are measuring the valve lash on cylinder 5 and cylinder 12. The knurled knob must be removed due to the location of the oil lines from the turbocharger.
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(1) 145-5191 Gauge Support . (2) 147-2057 Indicator Contact Point .
Install the 145-5191 Gauge Support (1). Use the 147-2056 Dial Indicator or use the 147-5537 Dial Indicator . Use the 147-2057 Indicator Contact Point (2). Install the tool in the rear bolt hole. The rear bolt hole is located on the valve cover base.Note: When you set the valve lash on gas engines that have a magneto, use the 147-2058 Indicator Extension . Use the 147-2057 Indicator Contact Point . Do not remove