after 45 min of running dozer looses power and wont climb hills with load. Pump has been replaced 3 times and problem continues to happen after oil warms up. any suggestions to problem?
She's sucking air somewhere or the transmission has excessive internal leakage.
Would be interested in see a picture of the parts of a failed pump. Lantraxco is probably right as a suction leak will cause cavitation and that will eat up a pump. How does the suction strainer look? Maybe also include a S/N for the machine on the chance someone wants to look in to systems operation manual on SIS