i just bought a 753c with 1500 hrs on it good clean tight machine however i am using a 72 inch bobcat grapple bucket on it and when i release the grapples on the bucket the right one will leak down the left one stays up also when i have the grapples clamped i dont seem to have enough pressure to move the bucket up or down or to tilt it any info would be much appreciated. the controls are on the right hand lever a thumb lever and a trigger for constant on and off thanks again for any help