anestg
Member
Hi john thanks for your input. It is a Waratah 622b head. It was paired right from new from the dealer as far as I know. The attachment rotate is plumbed from a small pump behind the pilot pump.
Yes there is another small pump on the other side of the pilot pump towards the motor. Yes you are correct, tracks are sluggish when stick acts up,but if I feather the dipper out it speeds tracks up to normal. I was watching pressures and with no service selected p1 had 1800 psi on p1 and p2 was normal at around 400psi. This is after pulling dipper back and not touching any controls. If I bump dipper forward it drops p1 down to around 400psi as we'll. would this mean that a spool is sticking and stroking p1? I took some videos today of pump pressure on screen and the problem of how the dipper free falls after pulling it in until you push lever for dipper out.The servo pump or pilot pump filter is the one in the top left in picture on the pressure hose from the pump in a aluminium housing next to the accumulator with the 15/16 nut on the bottom. Main pumps are different as we have a pilot pump mounted on the end of the main pump JCB anyway. Do you have another pump on the top by chance?
On the tracks when its hot if you can stall the track in turn with a an old bucket pin against the track frame mind your hands don't get caught my brother squashed his thumb this way bit of a mess to say the least and see if it drags the engine down as this is a quick way of testing the pumps as if you stall one track at a time you are only getting either p1 flow or p2 pump flow not a combined flow masking a fault .
As far the regeneration I will have a look in the book later and let you know might be slightly different though .
As far as tracking as you say the tracks appear slow for a short time and then become normal again if you were to select another service and feather say boom up or dipper out does this speed the tracks up.