9BL02024 3116 10psi at idle. About 5 to 7 at full throttle. And 0-3 under load causing it to bog out. Replaced transfer pump. New cat filters. Fuel feed line. fuel pressure relief valve. Tank was dropped, cleaned, and patched. No longer know what to do. Installed an electric in line fuel pump. I could only find a 12v high pressure so it’s only run to a single battery, and it fixes the issue. I’m pulling my hair out with this thing.
When you say you've replaced the transfer pump, what exactly have you changed. The transfer pump on these is built into the governor housing and isn't really a separate item. Also it would be worth looking at the hand priming pump. It's not unknown for the piston to break up causing an internal blockage.
Thanks for the illustration, i have the service manual and have went through all that. Stated pressures above were my readings.
Cat offers a complete transfer pump and governor assembly. Which i did not know till the second time around. Yes this is the second transfer pump. I replaced just the pump half and was getting a low reading and thought i had a faulty part. Given that i had replaced everything else. Called cat and they said why not replace the whole unit....i said well i didnt know you offered that. Cant find it in SIS. Well sure enough they do. Part# 10R-0998. So went ahead with that and no change. It makes no sense as to why im building very little to no pressure but when i introduce an inline pump there is no issue. Doesnt sound like im sucking air or anything by the sound of the pump but i have not verified with any clear tubing. The hand primer appears to be new and operational. No leaks or anything when priming the system but may be worth a look though just to confirm.
Have you checked your return fuel to see how much there is and if it has air bubbles in it?
No i have not. Was more concerned about the fuel delivery than return. I did verify no return restrictions but thats as far as i went.
I have seen where leaking injector seats can cause aeration of fuel and also affect fuel supply pressure. It should have some hard starting issues though also if that is happening.
No hard starts, starts easy unless its cold and it complains a little. But what mechanical doesnt!
Where in the system do you plumb your electric pump?
In line just before the water seperator
can you bypass the separator and disconnect inline pump may be pulling air
Potentially, id have to get another look at it to see if that would be possible.
Do you have one of these type separator? Try taking it apart and checking for crud. It's not unknown for it to build up under the lid.
I was about to suggest that. The cap 2-3 tends to hide all kinds of trash under it. Also they are bad for internal cracks. I would bypass it as a test as stated before
Yes i do, ill give that a shot.
The reason I asked IF you had one of these is because your serial number shows you as having one of these below. I thought this was strange because I haven't seen a 3116 powered track loader with one before. They have all been the above style. Have you quoted the correct serial number?
My 963B 3116 has the metal with screen inside. My 953C 3116 has the 117-4089 separator per Cat's update.
If he has the electric pump before the separator, it can't be sucking air, as it will be under pressure.
I do have the "newer" style water seperator. Serial number is correct. Unit has a total of 3 fuel filters. Im going out to the unit today and will take apart to see about contamination. Sis is a bit difficult with this one. Ive had to call Cat a few times to verify parts cause it will show multiple options. Must of got a split year or something.
thats the reason to disconnect in inline pump, to see if the condition pops up again "sherlock". brilliant deduction i may say holmes ,think before talking
Who pissed in your coffee? The pump had already been removed and tested without. The next step was to check the condition of the water separator cap and potentially bypass the water separator. Im confused as to where your needless comment came from?
this aint gonna turn into to a pissing contest thats for sure,when the machine first started having problems commenter did not know what was wrong then he attached a inline pump and every thing was fine, so should he just leave the inline pump or proceed further to diagnose the problem. my input was to bypass the separator and disconnect pump and see if problem re appeared if either air or crap is in the separator, mechanical machines have too be attacked methodically ,do you see where i was coming from, separators have been known for the last 40 years to have problems with pulling air mainly in the trucking industry where i was the last 40, as far as pissing in my coffee i do it every mourning makes me wake up faster better that snorting meth for all the tweek fu*ks out there. "iam out" have a good one and no hard feelings fest
Never tried **** in the coffee but i might have to give it a go if it works that well! Took the separator apart today, honestly never pulled apart one of the new styles. I myself have always dealt with the old style fuel bowls and i honestly didnt know these came apart. My background is in the trucking industry as well. But all that aside, i did find pieces of the old tank liner in there, cleaned everything and blew out again. No change. I didnt have the proper fitting to bypass the filter completely so i hooked the inline pump back up so the unit is still operational. Hopefully when the unit is back to the shop i can go through each component more thoroughly. But on a job they just wanna know how fast you can get it going.