Ever since i bought my Backhoe its lacked drive power i was used to with the 646 it replaced. It really didnt bother me because my parent property was flat and only a half acre so i was in no hurry with the machine. Now i have 13 acres and i back up to a mountain so it had become time to do something about it.
This machine uses a tandem pump. The larger section is for the drive motor and the smaller section is for everything else
Because my only issue was with the drive power i only took apart the large side of the pump and found these bad seals
Notice the missing chunks in the seals. i ordered parker kit 706024k for 98$ and it has all the seals and wear plates for that section of the pump only
Got it all back together and i regret not doing this years ago. The amount of power it has now is amazing.