Hi All,
I have a 92 Yanmar B3-1 grey market. Power is not bad but speed is relatively slow compared to newer machines (not surprisingly). I don't think there's anything wrong, I've watched videos of other B3s and they operate at similar speed. I've done fluid and filter. I'm wondering about the possibility of swapping the pump for a higher flow pump. I know it could be expensive and probably not worth it for this machine but I want to at least look into it. The pump is a Kayaba KRP4-12-12-12 CDY (shown below). It's a triple gear pump. I can't find much info about it. I don't have a manual for this machine (not yet anyway). Any suggestions on sources for a manual? I know its grey market but a U.S. manual would be better than nothing. I'd like to hear all thoughts about the feasibility of upgrading the pump. Obviously the spline and mounting flange would need to match, how common are the sizes? Hose fittings would have to match. Would a higher flow pump put too much strain on the engine? Could the lines and valves handle the higher flow? Will I lose power in favor of flow? I know a lot of these questions require specs to answer but I appreciate any advice, thank you!
Jeff
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I have a 92 Yanmar B3-1 grey market. Power is not bad but speed is relatively slow compared to newer machines (not surprisingly). I don't think there's anything wrong, I've watched videos of other B3s and they operate at similar speed. I've done fluid and filter. I'm wondering about the possibility of swapping the pump for a higher flow pump. I know it could be expensive and probably not worth it for this machine but I want to at least look into it. The pump is a Kayaba KRP4-12-12-12 CDY (shown below). It's a triple gear pump. I can't find much info about it. I don't have a manual for this machine (not yet anyway). Any suggestions on sources for a manual? I know its grey market but a U.S. manual would be better than nothing. I'd like to hear all thoughts about the feasibility of upgrading the pump. Obviously the spline and mounting flange would need to match, how common are the sizes? Hose fittings would have to match. Would a higher flow pump put too much strain on the engine? Could the lines and valves handle the higher flow? Will I lose power in favor of flow? I know a lot of these questions require specs to answer but I appreciate any advice, thank you!
Jeff