This message is a reply to an archived post by DW1307 on August 02, 2010 at 04:31:51.
The original subject was "Roosa Master injection pump problem".
A good way to free up stuck pumping plungers on a Roosa Master pump is to pressurize the inlet fitting of the injection pump. I use a little hydraulic power unit I made in which I can vary the pressure. When you do this you want to crank the engine over at the same time. I just got done unsticking the plungers on an old 97 Massey. I ended up using a little less than 150 psi. That engine smoked kind of ugly for a while as I ended up with the injection lines full of oil from the hydraulic power unit. Would not recommend this high of an inlet pressure to the pump however it may be necessary to do the trick.
The original subject was "Roosa Master injection pump problem".
A good way to free up stuck pumping plungers on a Roosa Master pump is to pressurize the inlet fitting of the injection pump. I use a little hydraulic power unit I made in which I can vary the pressure. When you do this you want to crank the engine over at the same time. I just got done unsticking the plungers on an old 97 Massey. I ended up using a little less than 150 psi. That engine smoked kind of ugly for a while as I ended up with the injection lines full of oil from the hydraulic power unit. Would not recommend this high of an inlet pressure to the pump however it may be necessary to do the trick.
