Yes, you should see at least some pressure when cranking.
If the lifters and yokes are traveling they are doing their job. Might have a clogged fuel passage at that one injector especially if it's #6 at the end of the fuel gallery. They are easy to remove and replace but it's a good idea to have replacement seals on hand.
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In the first pic I have fuel at this filter. Enough that if I loosen the cap fuel comes rushing out. I've checked this twice now over the weekend.
In the second picture is another fuel filter housing. There is hardly any fuel in there.
Was hoping to hear it run this evening.![]()
Both the torque converter fuel supply filter (the one by the oil filters) and the engine fuel filter should be getting 15 psi pressure when operating. What does the torque converter charging pressure gauge and the fuel filter pressure gauge say? Have you checked/changed the filters in the engine fuel filter housing?
Hello
Just a little comment, Some D342 engines in D8,s had a different fuel pump configuration.
I.e. the high pressure fuel lines to the cylinders were from the front of the fuel injection pump,
cyl 2 - 3 - 4 - 5 - 1 - 6 ???? I think. Your photo had me thinking.
Sorry if I am on the wrong track.
Best regards.
I never checked the tourqe converter fluid pressure when I had gotten it to run. I do know the fuel pressure gauge on the side of the engine never showed pressure.
I've ordered new filters.
The fuel transfer pump was known to give issues before. Is there a service kit available or a replacement?
That transfer pump is unique to the fuel torque converter 15A's. Part # 5H2787.
Not aware of any rebuild kit but Cat may still have individual parts for the pump. Usually you can recover some performance by resurfacing the pump cover and replacing the gears, depending on how severely worn the pump is.
Just some additional info - NPR shows that pump being used on the D8H 46A s/n 1-3043 and D8 35A tractors.
If that is correct, here are some tractors that have been dismantled for parts. The one place in Utah shows to have 3 to fit the serial number range. Might be worth a shot anyway.
https://www.machinerytrader.com/listings/construction-equipment/dismantled-machines/list/category/4/construction-equipment/manufacturer/caterpillar/model/d8h
NLA from Cat, but you didn't want to buy it anyway - the last price they had on them was a hair over $3175.