What should the valve actuators be on a C-15?
Don’t back them off more than that, the pistons can unseat and lose oil. Adjust the intakes to .015, the exhaust to .030 then adjust the 3 intake valve actuators to .020, and the 3 jakes to .027.
How to adjust the ACERT valve on a C-15 ACERT?
If both rockers on #1 are loose, then you have the engine pinned at #1 Top Dead Center. If they are tight, and both rocker arms on #6 are loose, then you are #6 TDC. Then adjust the Jakes over 1, 3 & 5. Rotate the engine one full turn & pin the flywheel again.
How do you adjust the vavles on a cat C-13 engine?
Place the appropriate feeler gauge between rocker arm and the valve bridge. Then, turn the adjustment screw in a clockwise direction. Slide the feeler gauge between the rocker arm and the valve bridge. Continue turning the adjustment screw until a slight drag is felt on the feeler gauge. Remove the feeler gauge.
How do you adjust the valves on an engine?
Use the following procedure in order to adjust the valves: Put the No. 1 piston at the top center position. Note: If the engine is equipped with an engine compression brake, loosen the adjusting screw for the lash on the slave piston for the compression brake prior to adjusting the engine valve lash.
How to troubleshoot a Caterpillar engine variable valve?
2. Check the Engine Oil Pressure A. Turn the keyswitch OFF. B. Establish communication between the Caterpillar Electronic Technician (ET) and the engine ECM. The communication adapter must be communicating on both data links in order to perform this procedure. Refer to Troubleshooting, “Electronic Service Tools” for more information, if necessary.
Where are the actuators located on a cat engine?
The ECM sends a signal to the coil in order to fully open the spool. The oil is released into the space underneath the valve cover and the rail pressure is reduced. Actuator (54) – The actuators are located under the valve covers. Pressurized engine oil flows from the rail to each actuator.
What does the IVA do on a C15?
The IVA does not have enough power to overcome the initial seat pressure of the valve springs. It does however have enough staying power to hold the valve open during the start of the compression stroke letting some of the intake charge to flow back into the intake and “pre heat” it for better combustion.