Huskey man
New Member
This is my first post so ever so here we go! I am trying to fix a Volvo ec25 with a strange hydraulic issue. When the hoe is cold everything works great as soon as it starts to warm up the engine labors when operating any function! when this happens the pump sort of binds up and bogs the engine down until you reach over and slap either joystick quickly. When it gets real hot the drive motors cause this to happen real bad to the point where any movement causes the pump to bear down on its self. Running aw46 oil just serviced with zero contaminants found in the tank or filter. Removed the main relief valve and found nothing wrong. The pump sounds great and has tons of power i do not think the pistons are in trouble! Also checked to make sure the Aux pedal is not stuck. 2,200 hours on the clock i have the repair manual and Volvo says there is a bulletin for sticking spool valves. Any help would be more than Appreciated!