980B Low Fuel Pressure / Replacement Fuel Filter Part # Help

I was working with the 980B and the engine started to miss and have lower power at full throttle. I noticed the fuel pressure had dropped when at full throttle however at low idle the gauge shows good pressure although its on the low end of the green. It didn't do this when I first moved it to the shop and showed excellent pressure on the gauge. First thing i wanted to do is get a new fuel filter. Currently it has a Baldwin BF7633 and I'm wanting to find out the correct number for a Cat filter replacement. The loader is serial number 89P2853 and the engine is a 3306 with serial 3N10981 arrangement number 2P6812. The machine had the fluids and filters changed not that many hours ago but its was 13 years ago. The oil filter on the engine is 1R-0739 and mention in case that's not the correct one.

Aside from fuel filter if you have any ideas on troubleshooting the low fuel pressure feel free to pass them along. Thanks!

For that machine the system shows a 1R-0750 spin-on as the secondary fuel filter element.
There is also a water separator shown. Your machine may or may not have it fitted. Try looking at the supply line as it leaves the fuel tank, it'll be there rather than on the engine.
Also I'd suggest looking on the tank for a drain plug and if there is one, drain it of any build-up of water and/or sediment. If you find anything in significant quantity you probably need to blow the fuel supply lines out one by one to make sure nothing is blocking them.

Try the above and see where that gets you.

EDIT: Thinking about it I'd do everything listed above EXCEPT change the fuel filter and see where it got me, then change the filter as the last step. But that's just me. When you do change the filter cut the old one open and look for gelatine-type material in it. That could indicate an algae problem in the tank.

13 years..?? ALL the filters are saturated & probably falling apart..??
Think along the lines of a wet roll of TP..
Def. blow the lines out..
Good luck.

Sorry, forgot to answer your other question. 1R-0739 is the correct engine oil filter Part Number.

Give it a birthday and throw new air filter elements in it too. 1P-7360 is the secondary, 7W-5495 is the primary.

Look on the side of the fuel pump there should be a small bowl with a bail holding it on, in side will be a screen that needs to be cleaned out or replaced. this is the primary filter.
Buy a couple of filters and change yours . I would buy some diesel fuel conditioner with bug killer and treat your tank.
There should be a plug on the bottom of the tank, pull that and drain a little out to see if you have water.
Good luck
Bob

thepumpguysc said:

13 years..?? ALL the filters are saturated & probably falling apart..??
Think along the lines of a wet roll of TP..
Def. blow the lines out..
Good luck.

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But........
"The machine had the fluids and filters changed not that many hours ago!"
Just have to wonder what other problems this machine is going to have?

Be careful when you loosen up that bail on the primary filter Bluox was referring you about. If the little nut at the bottom is stuck, squirt some weasel juice on it and work it back and forth until you get enough slack to swing the bail away from the metal cup. The brass filter under the cup just screws out but be careful there as well.

I think the sediment screen might just be part of the issue. Just a hunch.

Btw for those knocking on me about hours vs years since service I just purchased this machine and am going through it to get it running well again. The previous owner passed away and didn’t use it much if at all in the previous 13 years. Full fluid service and about to start going through the brakes system. Overall the machine seems to be in nice condition.

Nige said:

Sorry, forgot to answer your other question. 1R-0739 is the correct engine oil filter Part Number.

Give it a birthday and throw new air filter elements in it too. 1P-7360 is the secondary, 7W-5495 is the primary.

Click to expand...

Thank you for this info. I’ll get some ordered. The fuel filter should be here soon as well. Now that I see the sediment filter looks as it does I’ll be dropping the plug on the tank and clearing the lines. I really appreciate your insights and help!!!

Usually those screens can be blown out and reused but replace the gasket.
Drain some off the bottom of the tank then blow back thru the fuel line at the transfer pump.
When you change the fuel filter fill it with clean diesel and bleed the system with the priming pump before you try to start it.
Good luck
Bob

79Miner said:

I think the sediment screen might just be part of the issue. Just a hunch.

Btw for those knocking on me about hours vs years since service I just purchased this machine and am going through it to get it running well again. The previous owner passed away and didn’t use it much if at all in the previous 13 years. Full fluid service and about to start going through the brakes system. Overall the machine seems to be in nice condition.

View attachment 208155

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Sorry about sounding like I was knocking you about the hrs vs years. I was trying to make the point that sitting more or less unused for many years was not a good thing. Condensation is often the worst killer on any machine that sets for long periods of time. Fluids drain off surfaces and leave them exposed to rusting from the condensation.

From the looks of that small strainer cleaning the fuel tank would be a priority and maybe even plumb in an extra filter in the line from the tank to the fuel pump to try to protect things.

Condensation is not an ally, algae also prefers water to grow in the fuel, drain a little see how cloudy it is, may want to dump it all and reload.