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It has been several years since I worked on a 35 but the lines are easy to figure out. You mention that your 35 has a front fuel filter. '62-MF35's had 2 fuel filters, (1 primary and 1 secondary - front filter), later models had only 1 filter. The fuel leaves the tank shut-off value and travels to the transfer pump. From the transfer pump, travels to the primary filter, to the connection with the arrow pointing inward on the filter housing. The fuel leaves the filter at a connection with an arrow pointing outward and travels to the seconady filter connecting at a connection with a arrow pointing inward. The fuel leaves the secondary filter at a connection with an arrow point outward and travels to the rear of the injection pump. There is a long line that connects to the front of the injection pump that returns fuel to the secondary filter with an arrow pointing inward on the front (secondary) filter. At this location on the filter housing, there should be two connection points, one with an inward arrow, the other with an outward arrow. It is very important that these two connections are correct. If incorrect, the engine will not get enough of fuel and the return line will not carry heat and air away from the fuel injection pump. Engine will not operate correctly. All of these lines will be the large lines. The small lines are the return lines from the injectors, line to the fuel tank, and fuel supply for the glow plug. There should be a bango type connector that connects to the top of the front filter, (secondary filter). This line will tee with the line (long) that goes to the glow plug on the air intake manifold. There will be another tee that will connect the return line from the rear injector with the fuel tank line (connects to the rear of the fuel tank) and the line going to the glow plug. You will have to try to match the lines with this type of routing for the correct fuel return flow. The purpose of the line that connects to the fuel filter was to provide a fuel supply for the glow plug to aid starting. It has been over 30 years since I worked on a 35 Diesel, but with a little lucky you'll get the lines in there right location. Just remember the return line on the front of the injection pump is very important. If this line is crossed with the fuel supply, (line connecting to the rear of the injection pump), you'll have all kinds of problems. I have seen engines that would not start with the two lines crossed. There is also a line that will be the engine oil pressue line that runs to the dash (oil pressure gauge). This will be located on the left side of the engine to the rear, connecting at an elbow. There will be an oil supply line on the right side (near the air manifold) that supplies oil for the rocker arms). There have been some changes made to this line on some Perkins engines, but you need to be aware of this line. Good Luck!
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