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Old 21-11-2013, 10:12   #1
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Lucas CAV injection pump parts

I am resealing a Perkins 4-108 and besides the oil from all the usual suspects, there is much fuel leaking everywhere from the injection pump (Lucas/CAV DPA model 3247F190 that's the common one with the little semaphore turret on top, not the oblong box). So I ordered a seal kit. But now I found the fitting on top of the pump near the mounting flange, a compression rubber ferule joint between the body and the pipe (called "back leak connection" in a cutaway view I found on the internet) is cracked.
Does anyone there have the part and can part with it or could anyone suggest a fuel injection service business that may be willing to look through their used parts collection and sell me the little fitting? Thanks, Stan
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Old 29-11-2013, 08:13   #2
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Re: Lucas CAV injection pump parts

I just bought a whole kit, just to get the Orings for the throttle shaft, I didnt even relalize that there were rubber Olives/bits in all the fuel lines.
maybe this link wil help, sorry it's in england.

Perkins 4108 gasket & seals kit for hydraulically governed pump - 19.80 : Parts4Engines: Perkins Diesel Engine Overhaul Kits and Spares
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Old 01-12-2013, 06:41   #3
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Re: Lucas CAV injection pump parts

Tropp1, there are only two joints with the rubber ferulles, one on the fuel in line and one on the fuel return. Both vertical joints on top. There are more of them on all the low pressure fuel lines around the engine thought.
New question: my injection pump has two washers between the body and the banjo fittings (and one between the bolt and the banjo). One aluminum, one steel. Two of the connections leak. I wonder if the steel washer doesn't belong there, it seems to defeat the purpose of the soft aluminum washer.
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Old 01-12-2013, 08:21   #4
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Re: Lucas CAV injection pump parts

Correction. The gasket set comes with 12 steel washers, there are 4 banjo connections. So it may be that the aluminum washers don't belong there? Still a question remains: one washer or two?
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Old 01-12-2013, 08:32   #5
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Tomorrow I will be going back to the boat and will have a look for you. My motor is a 36 year old 4108 Lowline and with only 1100 hrs on it, it is quite original. So I will check to see if there are 1 or 2..

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Originally Posted by sv.antea View Post
Correction. The gasket set comes with 12 steel washers, there are 4 banjo connections. So it may be that the aluminum washers don't belong there? Still a question remains: one washer or two?
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Old 01-12-2013, 08:39   #6
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Re: Lucas CAV injection pump parts

S&W Diesels in Wilmington, Ca has an injection shop attached to them. They'll have what you need. Armando to the rescue!
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Old 01-12-2013, 11:55   #7
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Re: Lucas CAV injection pump parts

Thank you Steve, and thank you troppo1. Troppo1, don't go to any trouble contorting in the engine space. Further investigation revealed only the two outboard (and accessible) banjo connections had the additional aluminum washers. (Someone with my qualifications had been there before me.) The other two, apparently long undisturbed, had only one steel washer each side of the banjo.
Years ago I completely dissembled, freed frozen parts, reassembled and made work one of these pumps that was left out in the elements somewhere in a Caribbean boat yard. It worked afterwards. Sheer luck, I guess.
Anyway, if anybody wonders, it turns out it is not difficult, at least with the pump on the bench, to replace the O-rings that seal the two control lever shafts. Mine were shrunk and fossilized. The fuel shut off shaft has one small O-ring, the governor lever two, slightly larger ones. The shafts are held captive in their bores by the long mounting bolts w/ 8mm heads. In my case, the gasket of the little tower was left undisturbed.
The O-rings are in the sealing kit, but it's likely they are standard size and can be purchased for pennies rather than the $40 for the kit.
Stan
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Old 01-12-2013, 12:05   #8
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No worries, I could have bought the 2 Orings locally for 40cents but as the shipping cost 30euro's I went the whole hog and bought most of the gaskets and kits to keep as spares for when the 1st rebuild is due. Many years from now I hope.
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Old 12-12-2013, 14:57   #9
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Re: Lucas CAV injection pump parts

We just had a FI pump from a Perkins 4.107 repaired by Atmore Fuel Injection in Atmore, Alabama. Good service, fast turn around and a fair price. We rebuild 4.108 engines, but send our pumps out for service.
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