[88tlc]

Injection pump from the 4bd1T. Diesel Kiki, now serviced by all Bosch service mechanics. I removed mine, and had it rebuilt, and in the process learned more about these devices that I would pass along.
The front has the gear that drives off the idler gear, and crank, the very front is a centrifugal mechanical device that advances timing with rpm. the middle section hold the Barrels and Plungers that provide the pressure and meter flow, the rear portion holds the Governor. the very rear sticking off the back end is an aneroid, or some altimeter compensator. The levers and cams - the cam on the governor housing is the fuel screw, the top is the fuel shutoff lever, in the back this throttle lever. the cable looping around to the back side is an enrichment crank. Lower front is the lift pump, with a hand pump for emergent priming of the system. the dark cast flange holds the IP onto the engine, and 4 bolts that holds IP to the cast flange can be loosened, and adjust timing if necessary.


I took the IP pump in because of lack of power. The mechanic found signs of wear in the barrels and plungers and replaced all four. rebuild cost was like $700. Regarding the Aneroid, i was told by the IP mechanic that I needed to add boost pressure to the back of this, and would get like 30% more power. it seems that the aneroid is used to meter fuel flow, depending on the boost that is present.

A $2 dollar piece of hose, instead of a IP rebuild? could it be that simple of a fix to get more horsepower?

has anyone seen this before? the manual does not mention this device, or needing to add boost pressure. the engine when I got it, did not have this hooked up to boost, and there is no boost pressure port anywhere?

I have added a port for a boost gage, and was thinking of Teeing into this boost line for the boost to this aneroid.