I don't think the PT was designed for dozer type work. Skidsteers and dozers, push using the frame. If you push very hard with the PT, you will be trying to jam the piston rod further back into the cyl. Sometimes the PT will try and climb over the implement if it catches on something. If the cyl is not fully collapsed, the fwd momentum could generate more pressure than the cyl or hose can take and burst. There is no hard stop on my PT.
Does anybody's PT lift arms rest on the frame when fully down, or just sit on the cyl rod?