dongfeng tractor with y385t wont start help

[Diamondpilot]

Keep changing out the Injector Pump oil every few hours and see if it cleans up.

There is two drain plugs and one fill. Mine takes about 12 oz then let it sit for a hour and it will set itself to the proper level via the site plug.

As for the other possibility. Did you remove the fuel bowl from the tank and inspect the screen in the tank?

Chris

 

[Bob Rooks]

...then i pulled the lower rad hose and dumped it and some funki stuff came out of there, so i flushed it till the water ran clear, I also opened the cocks on the eng and flushed out what was in the eng also, closed it all up and pulled my thermostat and it was stuck...

This is exactly why I put coolant filters and coolant recovery reservoirs on all my equipment. I think I'm one of the very few on this forum that think they are useful and necessary. I just installed one on the excavator.

 

[Bob Rooks]

...one is that a common problem is a seal fails and fuel mixes with the lubricating oil in the pump.

There aren't any seals between the fuel and lube oil in the fuel injection pump. The only seal between fuel and lube oil is in the fuel lift pump, and that is merely an O-ring on the lift pump push rod, which never comes into play anyway.
What has happened when the lube oil becomes cross contaminated with fuel is that the barrel and plunger assemblies have become worn or corroded from dirty fuel or bugs and have lost their lapped fit.

 

[reelnative]

well what do you guys think the loss of power and spongy throttle feeling is from ?

 

[SPIKER]

I know on my IP it gets fuel contaminated in about 30 hrs of use to point it is thin and smells heavily of fuel. For last 400 hrs I just keep draining and putting synthetic 30 weight oil in it. Not sure if the Synthetic will HELP it live long term or make it worse but the thing just went over 550hrs (still have not done my head re-torque yet but planning for next week when I'm out of school...)

I been thinking of trying something heavier in the IP to see if that will slow the cross contamination which as said has been problem in this pump from the 100 hr marks or so... I can't really tell HOW bad the contamination is but I get a drip or two on floor after running it for a while and not sure how many "Drips" out of the weep during operation out in weeds/woods as it pretty much misses most everything depending on camber of tractor.

I'm at the point of well it is all FUNCTIONAL just wearing long term is only issue which means replacement but if it has to be replaced then might as wear out the one I'm using... I dont think there are any replacement parts inside these IP pumps that can be done by end users. Maybe so??

Mark

 

[reelnative]

new report, well guys i am in the middle of scratching a hole in the side of my head now, went out to do a rad flush and put the prestone in and was running it and again it wants to run up to 85c it is warm out 95 deg or so but I have the center of the thermostat taken out and im getting good flow, i looked into the rad while it was running looking for bubbles and i thought i saw a few but the water was moving pretty good so i really wasnt 100% sure but i said to myself well maby you pinched the head gasket when putting the head on, Hey it happens to the best of us sometimes, and that would make it run hot and give me low power yes the answer to all that ales me , so I finnished the flush thing and ran the tractor back into the barn and set in to doing a comp test and here are the numbers, i did 2 draws on each cyl, cyl 1 was 460 and 470, cly 2 was 440 and 460 and cyl 3 was 450 and 440 now the motor only has about 2.5 to 3 hrs of running on new rings so i know that the numbers are going to be a little off but to me those look like a dont have a blown head gasket or am i wrong, and if there good then what now about this heating thing, and the no power, loss of fuel feeling (pull the rad and ck it ) O and when i took it for a spin around the yard today again when i put it in hi gear it didnt want to go it wanted to stall ( no Power) so i put it in low range and it ran ok, im kind of thinking that the ip pump might have somthing wrong with it but i know nothing about ip pumps, when i changed out the new return line yesterday the bolt that held the line to the front of the ip pump had what looked like a little spring in it and the banjo bolt had what lookeed like a flat blade screw driver nut on top of it what does that do, i did notice the the return line into the tank was shooting a lot of fuel back into the tank, so it looked like the ip pump was supplying plenty of fuel

 

[Rich Waugh]

That's a check valve in the fuel line. Bob Rooks can better explain how it functions and why it is there, I believe. Your compression numbers seem about right to me.

 

[reelnative]

yea i changed the return line yesterday and my old one had a fitting on the front of the ip pump that had 2 lines one going from it to the fuel tank then one going up to the injectors, the new line is just one line comming from the ip pump to the injectors and then to the fuel tank, its the same setup but the fuel tank line is not there it all goes in the one line they just put the tank dump at the end of the line,

 

[Bob Rooks]

The banjo bolt with the spring and ball in it is a fuel pressure regulating valve even though some people insist it's only a check valve, which in effect it is, but that's not it's primary purpose. If it has a screw and lock nut it is adjustable, if not then it's pre-set to about 25 psig. Every diesel engine in the world has one of these or a similar device.

Your compression numbers look good, and will change up as the rings seat. Bear in mind that 20 psid is right on the threshold of marginal.

I'd have thought by now you would have figured out your temperature "issue", in that it really isn't an issue, it's just that you have a very responsive gauge. Clue: Why is it that you don't shut down an engine immediately after using it, instead, allowing it to stabilize.

 

[reelnative]

hahaha YOUR KILLING ME BOB hahaha your getting out the confushish stuff on me now, just dont start calling me grasshopper please hahahahah, so when you say 20 the 20psgi is on the line whet do you mean that it looks like it could be a blown head gasket ? ok now why do you think im loosing power, im thinking, maby i might be sucking air from the fuel tank