Toms trucking
New User
Looking for info on rebuilding the hydraulic pump on my d motor grader . I put a gauge on it and it's only putting out 700 psi. the book says the bypass valves don't open until 1400 psi. but it does not tell the pump pressure or gpm. There are 3 numbers on the pump they are 70078180 Kk30402 and 1512c3c1 can anyone tell me the pressure and gpm of this pump also is there a rebuild kit available for it. This machine has hydraulic blade,hydraulic side shift ,hydraulic turntable,hydraulic tilting wheels and we just installed a mid 70s Chevrolet power steering box on it that we are trying to run off the same hydraulic pump. I'm not sure if this little pump can effectively run everything , might need a bigger pump? Looking for some input I know some people have already been down this road Thanks Also looking for a parts manual for this machine I believe it to be a 1956 it was a gas machine converted to a 262 Buda diesel thanks again for any info.