2018 Toolcat 5600 2100 hours charge pressure dropping when warming up !

[oldnslo]

If dropping at low idle sitting still I would suggest checking both pump and motor case temps. Not moving motor in theory should have minimal case flow while pump has all of the charge flow dumping into via charge relief.

 

[RichardV-Quebec]

Gee, I thought it fixed itself for a while. I was able to drive for about 2 miles with 250-300 psi on brake line gauge and on T connector gauge of front motor hoses. It ran for about 15-20 minutes then at low idle pressure dropped below 70 and was hardly moving with high rpm. I did not have the laser temp gauge with me but putting my hand directly on the back of pump felt pretty hot. The cooler fan was turning. Engine temp was normal. Hyd eyesight normal. I did not get to capping the P1 line on the pilot manifold yet.