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Welcome To Mopar1973Man.Com LLC
We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features. Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.
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I'm trying to figure out the path of the fuel flow within the VP44 injection pump (IP). I'm interested in the slight possibility of additional cooling for the IP. Does anyone have any other pics or drawings or diagrams they can upload?
I've done a bit of research on forums and I've talked to BlueChip at lengths. The VP44's computer sits on top of a heatsink or is integral to it, this is bolted to the IP housing, and the diesel fuel passing under the heatsink cools the computer. There is a vane pump at the inlet of the VP44. The "ww.chinahanji.com" drawing is helpful. I'm thinking the area directly beneath the computer, adjacent to the inlet and outlet ports is a cavity and inlet to the vane pump. The fuel enters the cavity thru the inlet port, the cavity is pressurized to 14 psi via overflow valve (or pressure release/check valve, whatever you want to call it) that is integral to outlet banjo bolt. A portion of the fuel is taken from the cavity by the vane pump and fed to the high pressure rotary section of the IP, the rest is returned to the tank thru the overflow valve. This flow of fuel, most of which is returned to the tank is what cools the computer. Does anyone know what the bottom the computer/heatsink looks like?- is it finned or flat? The smaller cavity that the heatsink/computer also covers is shown with what looks like a wire ribbon passing thru and has a seperate gasket. Does anyone know if this is also filled with fuel? Please, are there any VP44 guru's out there that can correct me?
VP44 pics1.doc