Good morning. My 553 has 4700 hours. moving last snow, the right drive stopped working. previously, my bucket operation was slow and I was getting low pressure dummy light. a heavy equipment tech friend advised it is sounding like the forward pump is not turning. i plan to pull it loose today and check the drive. anybody know where a pump could be found? I have checked with Google. Not finding. maybe a scrap unit that has the pump? Thanks in advance for the help.