SpringValley

From your description a small light bulb lit up in my head.  I saw a device like that on some piece of equipment one time.  The glow plugs ran through this device.  As the glow plugs drew power the device would heat because of the amperage draw.  After it got so hot it would open and stop the glow plugs from heating.  I remember thinking that it was a very crude way of timing the heat up of the glow plugs…but what the heck it did work.  I have no idea if this is what you have or not.      

It's like anything new.  Just takes a while to get used to.  No worse that an operating system upgrade.  Of course if you use Windows an upgrade is normally a downgrade 

Hey Carl,

 Yes there were lots of guys that wanted to pump up the engine.  They always wanted to know what was the best button to put it.  That's the first thing we would check if somebody wanted warranty on something we did.  If they turned it up “sorry charlie”.

A kid that lives down the road from me has a Dodge pickup and he turned the engine way up.  850 ft lb torque to the wheels measured on a wheel dyno.  He loaned the pickup to a buddy of his who stood on it for about ten miles pulling a trailer up a mountain.   It dropped a hard seat that went through the side of the cylinder.  Long story shortened….over $5000 in parts alone to fix it.

I have a rule and that is leave it alone !        

Larry

This reminds me of when a guy worked
for me and we did an overhaul on an 855 Cummins. When I walked by
where he was finishing up the truck he had the aneroid valve blocked
off. I asked him why he did that and he responded that he always
blocks them off as the engine will run fine without it and there was
no need that he could see to have it. Don't get me wrong this guy
was a very good mechanic however there were certain things he simply
did not understand. The aneroid valve limits the amount of fuel
pressure going upstairs to the injectors until turbo boost is
present. This prevents it from smoking like it has a stack full of
oily rags when starting off from a stop etc. I told him that as long
as he worked for me he would be connecting the aneroid valve. Later
the aneroid system was built inside the Cummins PT pump most likely
to prevent people from disabling it.

 I don't know how many people here have
ever ran a real flow bench were injection pumps are calibrated but I
have. The fist time I ever saw one of these Chinese injection pumps
I said that it was an “early” Roosa Master knock off .

 The best photo I could find on the
quick is below. Note the plunger type pump on the side and even down
to the vent cap on top. The Chinese didn't design squat they just
copied a pump from the 1950's. The other pump in the picture is
after they went to a rotary fuel distribution inside the pump and the
picture is to show how much smaller the pump was that would do the
same job.

I wonder if anybody ever stops and
thinks why there is return fuel. If you have a pump that delivers a
measured shot of fuel then why even have the extra fuel that flows
though the injectors and back to the tank? The return fuel is the
cooling system for the injectors. They are in contact with
combustion and would not last too long without this extra fuel
carrying away some of the heat. Also it sure helps on cold weather
to have some warm fuel being returned to the tank.

 All of these fuel system that I was
ever involved with did have a valve that held so much chamber
pressure. There is a very good reason for this. Any volatile liquid
will have vapor pressure. As the temperature increases so does the
vapor pressure. For Diesel fuel the pressure will build rapidly past
140 F. If the valve did not hold some pressure and was completely
free to escape you could end up with an at lease semi empty fuel
chamber and run the risk of starvation.

I am with Tommy 100%. Somebody has to
pull the part and package it up for shipment. That person does not
work for free. Somebody has to bill for it. There is more cost. In
the state where I am by law inventory must be done at least once a
year so we can pay the state inventory tax. There more cost. The
postal service ad says “If it fits is ships up to 70 lbs” But
they still want to know the weight down to the ounce. That means buy
a freight scale that will give accurate weight down to the ounce. Go
price a good one. Oh, and the guy needs it shipped today but mail carrier, UPS etc has already came.  Now somebody has to run the thing into post office etc. Done that one hundreds of times.  

Small parts that cost a few bucks are a loss to even mess with.  A 1$ parts costs just as much to mess with as a $500 part. The problem is that nobody sees how much a business spends to get all this stuff done.

Sure glad I am retired from this crap!