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Hi dusty, welcome.
You have a couple of options here; check the dealers online parts catalogues or take the filters into your local auto parts store and match them up.
You can even call the dealers on the phone.
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There is one thing I have noticed about weather people; they get paid if they are right, and they still get paid if they are wrong.
I hope they are right on that prediction.
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Any word yet on when the Washington monsoon season starts” I have a 250' electrical trench to dig and have inspected. Seems that just when my body adapts to the mild & dry temperatures, stops squeaking, and I'm really getting things done, the weather goes South.
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Roger wrote:
If I understand you correctly the hand pump should get fuel up to the top of the pump only.
Correct. Fuel flows freely from the priming pump, through the secondary fuel filter, and into the injection pump fuel cavity (chamber).
Then by turning over the engine you get the fuel up to and including into the injectors to start the motor.
Correct. The barrel and plunger assemblies (the individual pumps) are operated by a camshaft in the injection pump and fuel is metered to the injectors by rotating the helix on the plunger with the rack.
If I can get fuel up to the top of the pump where the injector lines connect but no further, what could the problem be?
No problem. That is as far as you can go with the priming pump. It doesn't have the capability of bypassing the lap fit of the plunger assemblies.
I have what we will call the check valve connect to the return line that goes up to the injectors and on to the tank. With this connected this way I can pump forever and not get hard prime. If I understand you correcetly this means that that valve is weak and is allowing fuel to up through the return line instead of stopping the fuel in the top of the pump and letting it go up to the injectors through the top of the pump.
The Pressure Regulating Valve (PRV) must ONLY be on the return line to the tank. As Rich stated, you won't necessarily get a “hard bulb” with the priming pump but you should feel some resistance, and maybe a squeaking noise, after several strokes.
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No problem, and I apologize for my goof.The lift pump and primer pump are two separate pumps, incorporated into one body, but use the same check valves. WOW!
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Rich wrote:
Now, can you tell us what that ching is properly called? I used the term “check valve” since it works somewhat like one, but I know that isn’t correct – I just couldn’t remember the correct term from the last time this came up.
It seems like every engine manufacturer has their own name for it, but generically speaking it is a pressure regulating valve. The fuel pressure is regulated by the spring tension against the ball and is usually preset to between 20 and 35 psig. This pressure helps keep the fuel from aerating, and keeps a positive head on the plungers (like keeping them primed).
There are lots of different types of check valves, and this particular valve could be used for a spring loaded model, however, that is not it's purpose here. A “check valve” in the return line isn't really necessary but a “pressure regulating valve” is. It probably seems like a battle of symantics to the lay person, sorry.
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I'm not going to go into detail here but the so-called “check valve” must be installed on the outlet side of the injection pump fuel cavity (doesn't matter what end of the pump it's on, it's just one big cavity), and connected to the return line to the tank. Every diesel engine in the world has some such device and their purpose is not that of a check valve.
The resistance you should feel by using the lift pump to prime the primary side of the fuel system is governed by the strength of the spring in that “check valve”. If you feel little or no resistance then the spring is weak and the “valve” should be replaced, however, this would not necessarily keep the engine from starting. Some “check valves” are adjustable. There is also a chance that corrosion has destroyed the ball and seat contact point, rendering the valve useless. Ya gotta keep the fuel clean, dry (no water), and free of bugs.
You cannot prime the secondary (high pressure) side of the fuel system with the lift pump, this can only be accomplished by turning the engine over.
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