lift arm problem on 763

[nshoregrappler]

I originally posted the question on tractorbynet skid steer forum and was recommended to post to this forum. I have a slow drift down on my lift arms that I haven't addressed as the drift is small so only a minor problem. However, when i lower the lift arms on my 763 with the sand bucket on it's cutting edge rather than sitting with the bucket flat on the ground, the front end of the bobcat is lifted off the ground over night! I loaded the 763 on my trailer with the sand bucket on it's cutting edge and chained the front end down to the trailer, two days later the bobcat had applied enough pressure to crack/break some of the 2x8 boards where the rear tires were! It was recommended to me that i check the foot controls to see which circuit is remaining pressurized, with the engine off, but the electrical circuit on, and the seat bar down. I am awaiting a new keyless ignition pad, and once installed will test as recommended. Any other thoughts? Is the slow drift and the lift pressure from the same source and where do i start to fix both? any help is appreciated, because i'm lost. thank you.

 

[Tazza]

I'd start by repacking your lift cylinders, if they are by-passing, it can cause the lift arm drift. Start with the simple things first, if it still does it, it could be bad load checks.

 

[Jim A]

I originally posted the question on tractorbynet skid steer forum and was recommended to post to this forum. I have a slow drift down on my lift arms that I haven't addressed as the drift is small so only a minor problem. However, when i lower the lift arms on my 763 with the sand bucket on it's cutting edge rather than sitting with the bucket flat on the ground, the front end of the bobcat is lifted off the ground over night! I loaded the 763 on my trailer with the sand bucket on it's cutting edge and chained the front end down to the trailer, two days later the bobcat had applied enough pressure to crack/break some of the 2x8 boards where the rear tires were! It was recommended to me that i check the foot controls to see which circuit is remaining pressurized, with the engine off, but the electrical circuit on, and the seat bar down. I am awaiting a new keyless ignition pad, and once installed will test as recommended. Any other thoughts? Is the slow drift and the lift pressure from the same source and where do i start to fix both? any help is appreciated, because i'm lost. thank you.

Check control valve and relief valve .
Usually piston seals so not allow drift only weak lift power since once control valve is closed on both ends oil cannot escape rod side or piston side unless packing is leaking.