I replaced my Case 450 crawler loader bucket with a Case 455 4 in 1 bucket. Really a great bucket, and can do a lot of work with it I never could do with a regular bucket. The new 4 in 1 bucket is 1.25 yards and a LOT heavier than the old 7/8 yard bucket. I haven't done any loading with the new bucket so I don't know how it will perform picking up a full load of gravel or dirt or ???? So I was thinking, if I need to increase the size of the lift hydraulic rams does any one think the existing hyd. pump will be big enough to do the job? Or if I need to get a larger hyd. pump, maybe the hyd. pump from a 455 case, and will it hook up to the 450 engine to do the job. thanks.....Phil