Roosa Master injector pump

(quoted from post at 17:31:23 12/13/19) Dieseltech, have you found anything that will cut the dried diesel residue that clogs them when they sit like that?

Lacquer paint thinner. Had a MWM Murphy which set up a long time. No fuel to 4 injectors, ran on 2 cylinders and no response to throttle or to SD. Disconnect injector lines, run temporary fuel suction hose in can of lacquer. Spin engine a little and let set. Repeat until fuel at all lines.

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(quoted from post at 11:38:05 11/24/23)

(quoted from post at 17:31:23 12/13/19) Dieseltech, have you found anything that will cut the dried diesel residue that clogs them when they sit like that?

Lacquer paint thinner. Had a MWM Murphy which set up a long time. No fuel to 4 injectors, ran on 2 cylinders and no response to throttle or to SD. Disconnect injector lines, run temporary fuel suction hose in can of lacquer. Spin engine a little and let set. Repeat until fuel at all lines.

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I suspect if he reads this his answer will remain the same, NO. Lacquer thinner has basically no lubricity. So the risk of the close tolerance parts in the pump scoring and becoming stuck in their bores is very high. This work around is to tricky for him to recommend this as a trained diesel pump repair technician. If this is done once all the cylinder ports are discharging the lacquer thinner should drained from the pump housing by one of the advance plugs. A tablespoon of ATF should be poured into the housing return fitting port and the pump filled with clean diesel before attempting to rotate it more for restarting. Also a pump that has seen water pass through it may not respond to this treatment.

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