RC4WD Excavator

[9W Monighan]

Nice video Joe, You manage to make that operate very smoothly. What comes to mind with the motor straining is the pressure relief valve is set too high or there's a restriction on the return line? I notice it cycling slowly and that could either be too small GPM pump or a restriction. The noise, air cavitation? On my pressure washer I'm experiencing a similar problem,possibly the relief valve sticking due to rust particles getting caught inline. I have no experience with these model hydraulics but hope someday to graduate into one.