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|The Dieselfication of Coach 1046|
|Author: BigRabbitMan (Show all albums)|
This album is dedicated to following the process of Coach #1046 being converted from a 1976 Chrysler 440-I with a 4spd Allison AT540 transmission to a 2006 GMC Duramax LBZ turbo diesel with a 6spd Allison 1000 double overdrive transmission. There is a companion discussion thread in the Mechanic's Corner section of the Forum area of this site.
This is all that you can see of the tank from the outside. But it is there!
This is the bottom of the fuel tank. It has a stainless steel angle iron piece running along each end near the bottom. Then four bolts that go through rubber grommets, through the angle iron and up into cage nuts in the subframe hold the tank up. No straps to break! Notice the drain provision at the right rear of the tank.
In this closeup, you can see two things: first is the "mini" sump that I had built into the tank. It is about 1/4 inch deep and 3 inches in diameter. It will collect any heavy particles or small amounts of water that end up in the tank. In the middle of that I had provisions for a drain plug included. But for the plug I am using a Femco drain plug that allows me to very easily drain a cup or so of fluid at any time. What you are seeing is the dust cover as the actual valve mechanism is inside the tank and very safe from damage from road debris
I had a bracket made to hold a second fuel filter. The one that will go here is a 2 micron filter.
The second filter is installed. The fuel will now go from the lift pump to the OEM filter (white object in upper right) and then to the large 2 micron filter and then to the engine. Maintaining fuel purity is very important with diesel engines. This filter arrangement will help achieve long injector life.
This is my Onan generator without its cover. Since the gas tank has been converted to being a diesel tank, the Onan has been converted to propane as its fuel. The shiny object is the mixer valve that has replaced the gas carburator. Below the deck, a shut off valve has replaced the fuel pump.
Here are the two fuel filters with hoses attached.
Looking at them from below.
With fuel injection systems, more fuel comes into the engine than is used so some of it has to go back to the tank. Here is where the excess fuel leaves the engine and heads over to the other side of the firewall.
Hard to see, but the return line then comes down in the corner of the engine compartment and then goes rearward to the right side of the fuel cooler. The returning fuel has picked up heat from the engine and part of that heat is disipated here to prevent over heating of the fuel over time. The fuel exits the cooler on the left and then returns to the fuel tank.
This is where I mounted the transmission control module (TCM).
The engine control module (ECM) was then attached higher up and on the other side of the vertical mounting plate. This puts the engine compartment modules and the fuse/relay box close to each other with easy access for service.
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