What are the timing marks to install injector pump on Isuzu DA640 engine?

To install the injector pump on an Isuzu DA640 engine, align the timing marks on the pump and the engine. Typically, you will need to set the engine to top dead center (TDC) on the compression stroke of cylinder number one, ensuring the timing marks on the flywheel or timing gear are in the correct position. The injector pump should also have a timing mark that aligns with the engine’s mark when installed. Always refer to the specific service manual for detailed instructions and illustrations.