New to the forum. Just picked up this unit. Shuttle shift left side. Has backhoe attachment. Both left and right brakes hold. Left track will spin machine when pulling right lever. Pull left lever machine stops. Right sprocket appears to have no drive. Could it be in the linkage? Sat a couple years then previous owner got it said no power to right track since he started to use it. All other hydraulic functions sppear strong. Also has 2cyl engine. No tag I can locate. Is it a ty290? See attachment for serial number on machine. #90039. Any information, manuals, parts sourceswould be greatly appreciated. Also water pump is leaking so need one of those.