Yes, you should definitely feel resistance. Is the fuel running freely when you loosen the bleeder bolt on the prefilter?
If not, you might have a sediment block in the strainer/valve assy in the tank. If you have access to comp. air, try a backblow thru the line between the strainer and the hand priming pump, that usually does it. If you still do not have any backpressure when priming, you might have rust in the valves in the primer pump.Now mine is a Coventry built '35, so it has the Lucas/CAV diesel gear, and that is totally different from yours, but the main principles ought to be the same.: Tank with strainer/ shutoff valve, line to prepump with primer handle, line to prefilter, on to fine filter, from there to low pressure feed pump inside injector pump. from there all is "don't touch" except for the fitting nuts on the high pressure lines to the injectors. Normally you have bleed valve bolts on prefilter, fine filter and low pressure section.
The '35 is known to clog the strainer/ shutoff valve assy and rust the springs in the pre/hand pump when exposed to whatever little water that might get into the system.
Pls. keep me posted on your progress. Thyge
Taageskov
Denmark
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