[AT] Standard Ricardo Injection tubing

[James Peck]

Unit injectors are what EMD injectors  are called. I remember them going near a camshaft. I do not remember the rocker but we would not want the lobe touching something other than a roller. One virtue of a unit injector is that it is an injector nozzle and pump in one device. They do not need high pressure fuel line tubing.



One thing I remember about unit injectors was that they eliminated unequal pressure buildup times in unequal length fuel line.



The last time I touched a locomotive I was working for an EMD competitor and EMD had not been able to meet emissions with a  2 stroke. Locomotives are not what I wanted to spend my life doing.



https://en.wikipedia.org/wiki/Unit_injector



At the time the Standard Ricardo 23C was designed the UK was still on the inch system, although with an entirely different set of thread standards than the US. Are you saying that the 23C was built with metro fuel injector tubing assemblies and fittings. Could be for all I know. Do you? Did it use inch or metric tubing sizes? The critical thing is to match the threads at either end.



You seem to be using much bluster and little  fact in your side of the discussion. Do you have a financial gain that makes one option more attractive? Did you grow up in an inch country and have a fear of metric?



Tubing is manufactured in various sizes, wall thicknesses, materials, harnesses, and in seamed or seamless styles. I am not aware of other factors that would cause tubing to be designated for hydraulic use only. What distinguishes "fuel line" tubing from "hydraulic" tubing in your mind. If it is sold by a fuel injection service shop it is "fuel line" tubing? I used to see 20 foot long bundles of a particular size of tubing come in on a semitrailer.



Even automobile OEM manufacturers of hose and tubing assemblies start with raw tube from a supplier. The fuel injection service companies buy the tube and fittings from suppliers to make up the assemblies.   If the tube or fittings are not available they may only be able to repair the leaking tube assemblies.



DIY spark plug are not a good analogy. DIY spark plug wire kits used to sold. I never liked them. Too hard to get them water tight.



The options as I see them are:

  *   Locate 23C tube assemblies for sale thar are pre bent for use with glow plugs
  *   Re-bend the existing 23C tube assemblies per Carl's suggestions so they do not leak.
  *   Locate 23C tube assemblies for sale that are not bent to clear glow plugs and rework them to clear glow plugs so they do not leak.
  *   Get Mr. Dixon who adds glow plugs to 23C heads to fabricate  a set of tube assemblies. Developing the procedures to add glow plugs may mean he can fabricate the fuel lines that fit.
  *   Get the thread sizes for the fittings on the existing tubes, sketch up fittings with the fittings and tube that go in between. A different type of tube to fitting seal may have to be used such as flared or reverse flared. Assemble them yourself.
  *   Get a fuel injection service shop to bend up a new set of fuel tubes with new fittings on either end.
  *   Get a fuel injection service shop to bend up a new set of fuel tubes with reused fittings on either end.



I would guess that the need to replace fuel tube assemblies has come up in the past on diesel tractor restorations. Thar probably adds more weight to the options that only replace the tubing portion of the fuel line assemblies.



Thomas Martin AT List Member (tmartin at xtra.co.nz); James why do persist with such nonsense?

Will it be DIY spark plugs next?

Injector pipes of this engine size generally are 6mm in diameter with a bore of between 1.5mm & 2.5mm, depending on the cross-sectional area of the nozzle holes.

Where are you ever going to find hydraulic tubing to match that?

Plus the fittings at each end are metric.
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