fuel pump removal

[frankpallares]

hola have cummins 60236284

any special tricks/tools needed to remove fuel pump?

do u have vacuum gauge and fuel pressure gauge in your store?

many thanx

frank pallares

Topic

[Francis Valerio]

I know this is old thread but just for “others” that may read in the future I just can not stress enough that “AIR” leaks in the system are INVISIBLE to the eye and you may have one and NOT know it. 

ALL lines BEFORE the lift pump are VACUUM and may not leak fuel that you can see, they usually will leak air INTO the line that you cannot see and may only do it under heavy load so at the dock you may not be able to diagnose your problem.

A vacuum gauge that has moveable second hand indicator is a good thing to have bc you dont need watch it, you can check it after and the second hand will stay at its maximum vacuum reading.

I only know from learning the hard way.

[Rob Schepis]

There is a return check valve that holds the fuel pressure located on the outlet on the pump return.

If you can, put a fuel shutoff valve right before the lift pump and shut that off right after running the engine and then next time you go to the boat open the valve and try to start.  If she fires right off you know your issue(s) are on the other side of the valve…

 

[Bradley]

Thanks Rob for your reply.  This engine has about 1,500 hrs (vintage 1996) CPL 1975.  I have Racor 900 primary that I haven’t refurbished in 10+ years.  I know the Racor has a check valve so maybe it’s weeping causing the loss of fuel pressure.  I’ll pull apart Racor and re-build.  Not sure if the return side has dip tube. I’ll check for that next.  Do you happen to know if the Lift Pump has a check valve built into it.  What actual keeps the fuel gallery pressurized is it the Racor check valve and dip tube?  Trying to understand the mechanics.

[Rob Schepis]

Air……

Lift pumps last a long time – thousands of engine hours.  Sounds like air is getting into the system.  Have you recently serviced a filter, such as a Racor.  Have you considered fuel level & lack of a return line dip tube?  See this post

Question on Starting, and some observations

[Bradley]

Not trying to highjack but if I have to pump the lift pump to add fuel pressure prior to starting is this an indication that the Lift Pump should be replaced?  Is there a check valve within the pump assembly that could be stuck open?  Is it difficult to replace Lift Pump?  Any ideas to why no fuel pressure and therefore no start?  Once I hand pump Lift Pump and hear squeaking it starts and runs perfectly.   

[Tony Athens]

You have a 6BTA 315/330 CPL 1975 .. Are you referring to the P7100  injection pump or the lift pump?

 

Tony

 

 

[Author]

Replies