Bremcon
Member
I'm looking for a water pump for a Mitsubishi 6D31T engine, does anyone have the part number?
Thanks, Drew
Thanks, Drew
Last edited:
SK330LC - YC07 with optional attachments
Here's what i checked, teed into solenoids:
All solenoids are functional, P1 Bypass, P2 Bypass, Arm Re-circulation, Travel Straight, Pump PSV 1 and PSV 2 outputs secondary pilot pressure to specs.
I'm not sure what the Independent Travel Solenoids are for though.
Swing Priority Solenoid also Functional.
Pressure Sensors for Pilot, Negative Flow, Back Pressure and Pump High Pressure Sensors are all good.
Pressure Checks: Boom Up Stall Pressure : 5300 Psi
Bucket Dig Stall Pressure : 5300 Psi
Arm In Stall Pressure : 5400 Psi
Swing Stall Pressure: Left :1800 psi, Right: 3500 psi
Problem: Boom Up, Bucket Dig/Dump, Swing and Right Travel very poor performance.
Arm and Left Travel Works really well.
The swing moves really slow until you pull the arm in function and it swings a lot faster.
The Boom down won't lift the machine whether it's idle or full rpm, until you simultaneously push the arm out lever with boom down then the machine will lift itself properly.
The right travel has no power to track, at idle or full rpm (stall pressure for right track went up as high 3000 psi max, nothing more.
Left track Stall pressure was about 4400 psi.
P2 Pump runs a bit on load - 800 Psi on idle, P1 runs around 334 Psi Idle,
I'm thinking to check the P1 pump regulator, (P1 Side Problems: Boom, Bucket and Right Travel slow but the stall pressures reads fine enough which means the pump should be okay) just not sure if it's outputting the right amount of GPM.
Not sure why the swing would be slow since it's on the P2 side and only works well when the arm in is used together with it.
Was wondering if there's anything i'm missing out here to sort this out, any ideas?
Kobelco sk210-lc8 pouring black smoke
I just saw this thread. I'm posting this as a duplicate to the generic excavator forum.. Hope I'm not breaking any rules...
Hello everyone.
I'm hoping some of the expertise on this forum can help me. I am having issues with my kobelco sk210 lc-8 POURING black smoke when it's under load. Only under load. I can rev it high and it's fine, but as soon as I lift the boom or perform any function with the controls it pours black smoke. Here's what we have done so far to troubleshoot:
A little history: We had it at a friends house and it was running fine. We had a blizzard with about 2 foot of snow. Long story short, after the snow melted, we went to move it. about 20 feet and it died. After a fuel pump replacement and filters, we came to find out the entire Lower fuel filter housing was completely packed full of mud. So after all that was cleaned up it was running great...probably put 50 more hours on it....Then we moved it to a new job and noticed it was slowly losing power and more black smoke, so we stopped running it. Replaced the filters again and then took the fuel tank off and scraped a significant amount of smelly mud and random parts that didn't belong in the tank. Didn't help.
First thing that came to our minds was not enough air and too much fuel.....
* First we checked for dirty air filters. Ran the machine without them for a quick test. Not the problem. However from sitting a mouse had built a nest in there... and to my luck when I had my head down in the engine, ol jake the snake decided to come out. I about did a back flip off the counter weight lol.
* We disconnected innercooler lines, etc.. to make sure no restriction was in the lines.
* Rebuilt the turbo. Noticed a little oil leaking past the seals, and turbine had too much play for our liking. So nice rebuilt turbo.
* Took the little heater off on top of the engine and that was fine.
* cracked each injector line to see if they affected the engine. All injectors seemed to perform as they should.
* Blew out all of the fuel lines after disconnecting all of them.
The only thing left that we can think of is the injection pump, so we took that off, then we called B&D diesel and they said to put it back on and it didn't sound like the pump. It sounded like loss of fuel????????? And try to bypass all of the lines by hooking up a jug of diesel fuel and a line straight to the injection pump.... Thunderstorms limited our work yesterday so were going to try that this week.
The engine is a CNH or IVECO... There is a CNH tab right on top of the motor..
Anyone have any ideas? And no we havn't purchased a service manual yet..... it's coming though.
Update: we bypassed the fuel and hooked a jug of diesel to the injection pump. Same problem. Also it happens at idle and at full rpms but only when you activate the hydraulics fully. If you lift the boom gradually it doesn't do it as much. Any thoughts?
response to 87silver:
Yeah. It was pretty bad. But the good thing is the filtration on that machine. The bottom larger filter goes straight up to the fuel pump and then from the fuel pump back down to the second and third filter, then back to the injection pump. The smaller filters didn't have anything in them or the housings. So it looks like the large filter took one for the team. Yesterday we replaced the smaller filters just to weed that out.
Exhaust: We took the muffler off. We separated it from the turbo where that silver band clamp disconnects. Turbines spin freely.
It's odd. You can turn the throttle up and leave it there. Engine doesn't miss a beat. As soon as you pull back on the lever to raise the boom, black smoke fills the air and the rpm's drop down. If you pull back gradually though, it's not as bad.
Another thing that I don't quite understand is it does it at idle(under load) and at full throttle (under load). My assumption was it would be able to deliver enough fuel at idle under load more so than full throttle.
So the only thing I can think it would be is the injection pump or the injectors.... We also checked the air flow from the intake yesterday again. It puts out more air than my leaf blower!
Hey Kevin,
Get someone to check if the air intake hose is collapsing under load. We have had cases where the inner lining of the air intake hose to the turbo etc would collapse when the engine was under load literally choking the engine! Could be the cold messed with the rubber hosing or something.
Hope this helps!