Halitrrax

I have a New Zealand built track loader with a vickers TA1919V20r pump, the charge pump pressure is 190psi, when you go forward the pump starts to rock that badly that it seems that the motor and pump are going to break of the engine mounts, if you drop the revs it most time stops rocking. Change filter checked suction line, checked relief valve, cleaned hydraulic tanks and I can not find a strainer on suction line to charge pump. any ideas cheers mic

Halitrrax