Hey guys,
I just got done helping my mechanic put all the external stuff back on my 953b (fans, belts, air filter box, ect....) yesterday. It cranked an ran fine yesterday but I didn't drive it around, I just ran the bucket and arms a little. Anyways it has a freshly rebuilt motor, built by my mechanic, in it. We had to have cat come out last week because the motor wouldn't stay running long and it was missing and blowing a lot of smoke. Cat found were one push rod had slipped out of place (explained the missing) and said that it was running rather ruff because the check valve was bad on the fuel return. We replaced the check valve and fuel priming pump and it cleared everything up but it still was blowing grey smoke pretty good but my mechanic said that was to be expected until I broke the motor in good and seated the rings good. Cat checked the fuel rail pressure and said it was great and holding fine ant low and high rpms.
Well I whent to put antifreeze in the loader today and get it ready to be moved. Cranked it and let it warm up, everything running great set aside from some the grey white smoke. Throttled it up to 3/4 throttle and the smoke died away pretty much. After letting it run for about 10-15 minutes I decided to drive it around and play on it some. Once I started driving it the motor started acting up when it got put under a load from driving forward or reverse and running the hydraulics. It operated fine for a little bit but then started choking out when driving it around. The motor would bog down and it would start blowing a good bit of black smoke. Once I put all the hydraulics back in neutral, the rpms would build back up but the motor was running ruff. I let it continue to run on low idle and it cleared up and started running smooth again. Tried driving it again and the same thing happens. Let it sit at low idle and smoothed back up. I took the air breather off of the back side of the turbo and checked to make sure it spun freely and didn't have any play in it. Took the air filter out and ran it to make sure it was getting adequate air.
It seems as if I have something going wrong in the fuel system? What is your opinions on why the motor would run ruff when the hydraulics are engaged and then continue to run ruff after the hydraulics were disingauged?
Many thanks for all of yalls advice!
I just got done helping my mechanic put all the external stuff back on my 953b (fans, belts, air filter box, ect....) yesterday. It cranked an ran fine yesterday but I didn't drive it around, I just ran the bucket and arms a little. Anyways it has a freshly rebuilt motor, built by my mechanic, in it. We had to have cat come out last week because the motor wouldn't stay running long and it was missing and blowing a lot of smoke. Cat found were one push rod had slipped out of place (explained the missing) and said that it was running rather ruff because the check valve was bad on the fuel return. We replaced the check valve and fuel priming pump and it cleared everything up but it still was blowing grey smoke pretty good but my mechanic said that was to be expected until I broke the motor in good and seated the rings good. Cat checked the fuel rail pressure and said it was great and holding fine ant low and high rpms.
Well I whent to put antifreeze in the loader today and get it ready to be moved. Cranked it and let it warm up, everything running great set aside from some the grey white smoke. Throttled it up to 3/4 throttle and the smoke died away pretty much. After letting it run for about 10-15 minutes I decided to drive it around and play on it some. Once I started driving it the motor started acting up when it got put under a load from driving forward or reverse and running the hydraulics. It operated fine for a little bit but then started choking out when driving it around. The motor would bog down and it would start blowing a good bit of black smoke. Once I put all the hydraulics back in neutral, the rpms would build back up but the motor was running ruff. I let it continue to run on low idle and it cleared up and started running smooth again. Tried driving it again and the same thing happens. Let it sit at low idle and smoothed back up. I took the air breather off of the back side of the turbo and checked to make sure it spun freely and didn't have any play in it. Took the air filter out and ran it to make sure it was getting adequate air.
It seems as if I have something going wrong in the fuel system? What is your opinions on why the motor would run ruff when the hydraulics are engaged and then continue to run ruff after the hydraulics were disingauged?
Many thanks for all of yalls advice!