Where is the delivery valve on an injection pump?
The delivery valve is two pieces, the valves’ machined flat surface sits right on top of the Barrel’s flat top, and the smaller valve piece is found in the center, and is hidden by the large flange nut that the high pressure line attaches to. there’s a spring under this cap that holds pressure on the valve center.
How does an injection pump change fuel stroke?
Above: Plunger in foreground, and Barrel behind it. Notice the helix cut spiral around the plunger, also note that piece down a bit from the left end, this tang slips into a slot on the ring gear and it turns the plunger and adjusts the position of the helix to alter the pump stroke, (amount of fuel delivered per stroke of the pump).
What to do with a frozen injection pump?
Injection pumps found in small engines are normally pretty simple, but never confuse simple with a lack of precision, because any pump that works well is a precision piece of equipment, with tight clearances, so when you take a pump apart, you best make every effort to find a clean and well lighted area to work.
What are the elements of an injection pump?
One element is a plunger (like a piston), and a barrel, (like a cylinder), but there’s an additional bit of near magic, and that is a ‘helix’ cut up the side of the plunger, this is cut like the stripe on a barber pole, (a spiral like groove. Above: Plunger in foreground, and Barrel behind it.
How does the timing of an injection pump work?
When you adjust the timing, you can alter when the engine injects the fuel, therefore changing when combustion occurs. An injection pump is often driven indirectly from the crankshaft by chains, gears or a timing belt that also moves the camshaft.
How to install a fuel injection pump on a tractor?
Stop rotating as soon as fuel rises to the top of the #1 hardline port. 5) Install the pump onto the fuel injection pump gear and bolt pump to the timing gear case. 6) This procedure should get your tractor running, but some fine-tuning may be required to achieve optimum performance.
Which is the first step in fuel pump timing?
Engine pump timing begins with the timing of the fuel injection pump drive gear to the camshaft gear. The first step is the location of TDC of the compression stroke for cylinder Number 1.
How much pressure does a fuel injection pump have?
Pressure-Packed Fuel Injection. Today’s diesel fuel injection pumps are under pressure – even more pressure than what was once considered “normal.” Around 15-20 years ago, it was common for fuel injector pumps to process fuel in a system at around 10,000 to 15,000 psi (pounds per square inch).