400 Diesel purge procedure

John_400Q · May 15, 2009

Could someone provide me the procedure to purge the air from the diesel side of a 400 diesel. I have a tractor that has been sitting a few years. I was able to clean the varnish from the gasoline side. I was able to clean the sediment bowl on the diesel side and purge it with the valve at the top. I was able to open the drains on both pirmary and auxillary filters and open the vents on both. The Auxillary filter purged and dumped diesel out the top, but the primary did not. I also want to drain and refill the injection pump. I see the drain at the bottom, where do I check the fill level after I refill. Thanks, John

Anonymous-0 · May 15, 2009

Well...maybe I got lucky with a 450...but I did just what you did. Then I cracked the injector lines at the injectors and started it on gas. I moved the throttle just a couple of notches and waited to see the diesel come out of the lines at the injectors. I left it running and started tighting injector lines. When I saw some smoke I hit the compression release lever and she fired.
Don't know if that is the right way...but it worked for me.

Anonymous-0 · May 15, 2009

So far as oil in pump, has a drain plug and should have a petcock for oil level, just fill through the filler flap on back of pump, same oil as you are putting in the engine. If it has a lot of diesel fuel in pump, you can drain, refill with oil and keep an eye on it for a while, if it fills up shortly you will need to repair pump. To bleed fuel filters, first one is gravity flow, second one is pressure fed when engine is running and each injection nozzle has a bleeder screw on it , so fire it up, bleed filter first, then open nozzle bleeders and give it some throttle until fuel flows freely. cut throttle, shut bleeders and give her try.

400 Diesel purge procedure

John_400Q

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Anonymous-0

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Anonymous-0

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