Engine Long Block Short Block. Cummins oil cooler leak testing tool NT855 pressure plate+manual pump. NT855 pressure plate+manual pump, I hope all maintenance technicians can provide valuable feedback after using our tools. I will listen to good feedback and strive to produce maintenance tools that are efficient, high-strength, lightweight, and convenient to use. This will be used by maintenance technicians who work very hard and sweat hard every day to reduce their labor. Thank you all maintenance technicians in advance. The count starts from the day after you placed your order and excludes weekends and holidays. We are subject to labor law regulations that restrict weekend sales services. All the warrantee Are Limited in Parts Only, engine rotation is very Danger, to be safe when the engine running all the people must keep distance at least 10 feet away from engine rotation radius, any time the shut down valve must be active, keep your engine can be stop any time.