Sorry it's not a UOA to ponder....I know the UOA forum for HDEO has been slim as of late...
I know it's not the correct forum necessarily as the application are not in a truck or commercial vehicle, but we have three units where I work (6V92's) which are used as fire booster pumps. Idea is they kick in when the water level drops below a preset level, and assist with the regular process.
I've been going over the reports that have come back lately (I've only been at this current place a year and a half), and I have noticed they have been coming back with 5-7% fuel dilution for a number of years. I had a theory that the conditions in which they ran were suspect, but now I'm thinking the inherent design of the fuel injection system (unit injectors?) may be the culprit. I recall 6V53's having unit injectors, not 100% if the 92's do. Ours are activated electrically from a remote source which engages an electrically operated switch on top of the governor, and then finally engages the fuel rack...may happen quick, but that's a lot of stuff in between...
Pumps are always started an run at 1900 rpm, in which they get there within a second, like most 2 stroke detroits. Then, they're always shut down at the same rpm, no cool down, nothing. 1900 and then off...
So if it was just one unit, I would be looking for issues mechanically, but it's all 3 which have the fuel dilution. And it all shows up around the 20 hour mark. Always run at 1900 for about 1/2 hour per week, but sometimes they start and run if the water drops.
Ideas?
Oil is always straight CF/CF-2 40 weight, if the question arises.
I know it's not the correct forum necessarily as the application are not in a truck or commercial vehicle, but we have three units where I work (6V92's) which are used as fire booster pumps. Idea is they kick in when the water level drops below a preset level, and assist with the regular process.
I've been going over the reports that have come back lately (I've only been at this current place a year and a half), and I have noticed they have been coming back with 5-7% fuel dilution for a number of years. I had a theory that the conditions in which they ran were suspect, but now I'm thinking the inherent design of the fuel injection system (unit injectors?) may be the culprit. I recall 6V53's having unit injectors, not 100% if the 92's do. Ours are activated electrically from a remote source which engages an electrically operated switch on top of the governor, and then finally engages the fuel rack...may happen quick, but that's a lot of stuff in between...
Pumps are always started an run at 1900 rpm, in which they get there within a second, like most 2 stroke detroits. Then, they're always shut down at the same rpm, no cool down, nothing. 1900 and then off...
So if it was just one unit, I would be looking for issues mechanically, but it's all 3 which have the fuel dilution. And it all shows up around the 20 hour mark. Always run at 1900 for about 1/2 hour per week, but sometimes they start and run if the water drops.
Ideas?
Oil is always straight CF/CF-2 40 weight, if the question arises.
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