Merlyn wrote:Just done an injection pump change on one of the ships lifeboats. The lift pump is a vacuum pump built into the injection pump. Can't bleed the system, flattened battery after battery, no go. Quick way over this?
Check to insure the key switch to the electric fuel valve (if fitted) is turned on
Check to insure any safety shutdowns if fitted to the engine have been reset
Check and verify the pump timing
Check the fuel tank is full of fuel
Check the insure fuel tank valve is open
Check the seals on the fuel filter for air leakage and check to insure the filter is full of fuel
Check for some sort of priming connection on the filter that you can use to supply fuel to the pump from some sort of portable container or hand pump
Check the cam follower is not stuck in the guide
Check the linkage to vacuum pump is not damaged or broken
Check the diaphragm in the vacuum pump to insure it is not damaged or broken
Check the valves in the vacuum pump
Check to see if there is some kind of priming lever or wrench connection to the linkage in the cam box for moving the pump. (Lister Engines have them) Working the lever should draw fuel up into the pump
Check the throttle and fuel rack linkage
Troubleshooting 101 "Don't over think it - K.I.S.S. it"