jdemaris said: (quoted from post at 16:51:44 07/22/09) 410 has two fuel pumps; one on the side of the engine and one built into the fuel-injection pump. Engine-mounted pump is a diaphram pump and works off the engine-camshaft. Fuel pump inside the fuel-injection pump is a rotary-vane pump and turns anytime the fuel-injection pump is turning.
There is no design problem; the system works fine when parts aren't clogged or broken. You might want to check the fuel fitting at the bottom of the fuel-tank first, since it can clog fairly easy if there is no screen on it.
The two main problem areas for fuel are #1 the fuel fitting at the tank-bottom, and #2 the plastic dampener inside the fuel-injection pump (if it's a DB or JDB Stanadyne/Roosamaster).
Thank you for comment
When fuel tank was less than half, it didn’t have fuel pressure while pumping manually.
I fill up the diesel gas and bleed air between the tank and engine attached fuel pump (quantity air came out) and rest of connect (Fuel filter and injector pump) then fuel pressure was normal and the engine was running well.
I am going to wait until use of gas below the half tank. If it had same problem again, then probably need to be replaced engine attached fuel pump.
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