7235 Help

[dogpatch06]

I have a recent purchase 7235, 3 cyl diesel 4x4 Hydrostatic Drive with FEL. I just had it service with a Hydraulic Oil change with filter(s). The tractor has 1258 hrs, only 8 are mine. Engine oil was just changed along with a new fuel filter.

Today the tractor died. It ran for about and hour, then crapped out. The tractor needed to be jumped today in order to start it, which was the first time since I have owned it. It sat parked for just all of May and fired up after a month of sitting. Today, after running last weekend, stored inside, it wouldn't start. Jumped it, and it fired right up.

Moved some gravel around for about 45 min then went down a hill?retty steep. I came back up with a load in low, about 1800 RPM, and then it just sounded like it was lugging, lost RPM and stalled. Started and ran for about 20 seconds and died I needed to jump it again and then it did the same thing Hydro oil was low, and I added more? jumped again, ran 30 seconds?ut under load and stalled. No odd smoke or smell. Then she wouldn't even turn over with any speed even with a jump? I parked it in the road, on a grade and had to leave.

My dozer is down and my truck was 2 hours away, so I couldn't even tow it to the barn.

Any ideas????

Engine oil is new and full.

Hydro Oil was just changed, but low and I added a bit more.

Fuel is fresh and clear.

Battery condition is questionable from the previous owner.

Thanks.

 

[scoops]

sounds like the fule system needs bleeding to me.

 

[BuilderML]

Have you changed the fuel filter?

 

[dogpatch06]

Engine oil was just changed along with a new fuel filter. It ran for about an hour so if there was an issue with air from that change it would have been noticed before this…..right?

 

[dogpatch06]

Would it have run for over an hour AFTER the fuel filter was replaced before this happened. I would have thought if it was air in the system it would have shown up right away…..

 

[BuilderML]

Start with a new battery because if i had to keep jumping it along with it not running right that would drive me nuts. Sounds like its starving for fuel. Partially blocked line? crap in the tank ? Did you take your new fuel filter back off to see if it was full of junk? Is your fuel bowl clear so you could see if its full of fuel?Maybe water in the tank? Not sure how your set up is but are you able to drain any water that may have collected from the bottom of the fuel bowl or tank?
Seeing how it sounds like you just got this unit. Was it sitting for a long period of time that maybe the fuel is bad. How does the air filter look? Clogged? The thing i like about diesels is they pretty much just keep running as long as they have Fuel,Air,and compression. Wouldn't hurt to look for broken or partially broken even loose wires. I am not a mechanic by any means but i do always try the basics before i have to call someone. Hopefully someone with more knowledge will help you out soon !!!:drink:

 

[gtrippleb]

That sounds about like what my Sc2400 was doing. At first I didn't know what it was but after the second or third time of running rough and then shutting off, I pulled the fuel line coming off the tank and noticed there was no fuel coming out. I stuck a piece of wire in there and fuel started flowing again. Hooked up the fuel line again and the tractor ran fine. Sometimes it has no problem running and sometimes I'll have to do this 4 times in an hour. So I know there's something in the bottom of the tank stopping the fuel. It tends to run this way when the fuel level is below half a tank.

 

[dogpatch06]

Thanks for all the advise. I head up to the land this weekend with a new battery and will purge the fuel system and see what happens. Fingers cross like a politician.

 

[JRobyn]

My Kubota once had a floating clod of goo in the fuel tank that would suck down onto the fuel tank outlet and starve the engine. Caused symptoms like you describe. Sorta like out of fuel, but not really, and would run fine most of the time. Was worst when fuel level in tank was low. Just like gtrippleb. I figured I would have to remove the tank to get it out, but first I tried siphoning out all I could, then removed the tank outlet hose and blew a little pressure into the tank. Out came the goo! I rinsed with a bit of fresh fuel, hooked everything back up and it's been good since. Good luck with yours.

- Jay

 

[dogpatch06]

I think she is deceased. I put a new battery and bled the fuel system to include the filter, tank and injector pump. Listen and I think one cylinder is down.

 

[scoops]

That sounds to me like your battery is not strong enough to turn the motor over fast enough.

I'd better with a bigger battery(more cranking amps) and if you can preheat (do you have glow plugs) the intake air, it will fire provided you have fuel.

 

[dogpatch06]

Battery is good. Diesel mechanic confirmed something is dragging INSIDE the top end. No way to diagnose while on the hill. Considering options. Thanks.

 

[scoops]

how many cca is the new battery?
Your tractor only has 1000 hours on it, thats not much for diesel engine.
Who did the service you had done? maybe take it back to them to look at it for you?

 

[BuilderML]

So whats the news?:confused3:

 

[The Fred]

Amp draw the starter with an amp clamp or scope. Starter could be dragging, toast.

Diesels need RPM to start, if you do get it started check the charging volts. Should be 14.3 or so running.

Possibly by all the cranking you have flooded the engine. Might have to pull the glow plugs and get the extra fuel out. Could be a good time to do a compression test.

Good luck, Fred

 

[dogpatch06]

Thanks all for the tips and inquires. The machine sits 2.5 hrs away from my house as a wood lot. The latest is this: The slow starting is due to something inside the engine is moving separately that shouldn't be moving. Top end maybe???? I don't know. I was at the machine yesterday and removed the FEL so access will be easier for engine work.

I don't know whats next. Financial restraints may hinder this project. I'd hate to part this machine out as its like of low hours, and in decent shape.

When I get going on the project, I'll post an update.

 

[dogpatch06]

This all being said….does anyone here have, or know of a Mitsubishi K3G long or short block available?

 

[Joeb5173]

Have you investigated any further? Depending on the problem, I may have some parts to help you out on this

 

[gtrippleb]

Battery is good. Diesel mechanic confirmed something is dragging INSIDE the top end. No way to diagnose while on the hill. Considering options. Thanks.

I wonder if a valve is dragging? My father in-law has a lawnmower that has this problem and every so often he has to adjust the valves as the engine doesn't turn over.

 

[dogpatch06]

Thank you for the inquiry. I actually hauled the tractor off the mountain yesterday and brought it to one of the best diesel shops in the area. The valve issue may be the culprit…. I hope just the valves. Will post again with the diagnosis.