Phill S Posted March 26, 2021 Share Posted March 26, 2021 I've searched here for this item at length, but wonder if somebody might be able to provide the correct part number? I'm looking to replace the seal in the front cover while I have the engine in bits. Mine is a 1987 NA 2.5, with CAV injection pump. white90 has done a nice treatment on replacing the seal insitu here: http://forums.lr4x4.com/index.php?showtopic=5260 although sadly the pictures seem to be missing In this thread: Les Henson identifies the seal as "Delphi part number 7243-006". But google reckons that to be a boost diaphragm that looks like this: Could anybody can clear up this confusion before I start ringing people up. I always like to give the impression that I know what I'm talking about. Thanks - Phill Quote Link to comment Share on other sites More sharing options...
monkie Posted March 26, 2021 Share Posted March 26, 2021 Yes, you are right. That part there is indeed the boost diaphragm from a 19j injection pump. Quote Link to comment Share on other sites More sharing options...
western Posted March 26, 2021 Share Posted March 26, 2021 This might help https://www.stationaryengineparts.com/lucas-cav-dpa-fuel-injection-pump-exploded-parts-diagram/ Quote Link to comment Share on other sites More sharing options...
Phill S Posted March 27, 2021 Author Share Posted March 27, 2021 Good call Western - it's got to be one of those jobbies under item 28 on that diagram. Closest I've got to it so far is these guys: https://injectionpumps.co.uk/product/lucas-cav-dps-diesel-injection-pump-main-driveshaft-oil-seal/ I'll give them a ring on Monday. But if anybody can speak from experience that would be great. Quote Link to comment Share on other sites More sharing options...
Phill S Posted March 29, 2021 Author Share Posted March 29, 2021 One of those companies that don't provide a phone number. Hmm Ordered one anyway as my pump number 8520A060A is listed in the description. We'll see what happens... Quote Link to comment Share on other sites More sharing options...
Phill S Posted April 1, 2021 Author Share Posted April 1, 2021 (edited) So the following pictures show the inner workings of what white90 is referring to in his blurb. I think. Here's the original seal in situ: Now, I have my front cover off the engine but with the pump still attached so I don't loose the timing. Hopefully the gasket between pump and cover is in good shape. Any views on whether that is prone to breaking down and should be replaced? Still anguishing over that... Drilled with a 1.5mm drill. Tip of a self-tapper screwed in and it pulled out easily. Comparison between old and new: I'm still no wiser on what the part number is but they look like a credible match, The new one has a lot more meat in the sealing surface that fits around the pump shaft. It's a 1987 vehicle that has only done 3,600 miles and 1,100 running hours (it has a clock for that). Is it possible that the seal has suffered from lack of use? Or maybe the material just ages? Anyhow, the new seal would certainly go in. Just before I fit it, does anybody have a view on whether it should be greased, or is it simply lubricated by the diesel on the pump side? white90 says that "As soon as the seal comes out, the diesel inside the pump starts to trickle out...", so it appears there should be diesel behind the seal? S there's no need for grease? The workshop manual is delightfully vague on this seal - section 12, p81, para 6. Para 7 has us fitting the pulley so surely the washer they're referring to is this seal? It doesn't say anything about the gasket between the pump and the cover plate though. Or is that what it means by washer? The crankshaft and camshaft in the preceding sections are talked about as having seals... Confused of Penzance Edited April 1, 2021 by Phill S Quote Link to comment Share on other sites More sharing options...
western Posted April 1, 2021 Share Posted April 1, 2021 A phone call to the guys at Helston Diesel would be worth the time, they rebuilt my Tdi injection pump a few years ago & helped when I had a leak & supplied the new seal. http://www.helstondiesel.co.uk/contact.htm Quote As soon as the seal comes out, the diesel inside the pump starts to trickle out, and continues to do so as it self-syphons fuel out of the filter housing. The new seal just taps in and I used a 27mm deep socket to do this. It's very easy to damage the seal lip, as it tries to reverse itself as the seal is tapped in. A very thin screwdriver, such as a watchmakers or small electrical type will help to keep the lip in. Once in, replace the circlip, put the sprocket back on, no mention of a washer behind the timing gear. Quote Link to comment Share on other sites More sharing options...
Phill S Posted April 16, 2021 Author Share Posted April 16, 2021 Stopped by to talk to Helston Diesel yesterday morning. Spoke to Dave who said that a wipe of grease was probably a good idea. Seal all done and in, no problem. Thanks all Phill 1 Quote Link to comment Share on other sites More sharing options...
western Posted April 16, 2021 Share Posted April 16, 2021 Defintely worth the drop in to ask then, pleased it was a easy fix. Quote Link to comment Share on other sites More sharing options...
Troll Hunter Posted April 22, 2021 Share Posted April 22, 2021 On 4/1/2021 at 11:10 AM, Phill S said: It's a 1987 vehicle that has only done 3,600 miles and 1,100 running hours (it has a clock for that). That makes an average speed of just over 3mph. Perhaps it has a clock for clocking the mileage! Mike Quote Link to comment Share on other sites More sharing options...
Phill S Posted April 22, 2021 Author Share Posted April 22, 2021 Hi Mike. It was a radio truck, so spent time sitting about on tickover keeping batteries charged. Need to get rid of the massive 24v generator - weighs more than I do. Converting to 12v will be phase 2... Quote Link to comment Share on other sites More sharing options...
hurbie Posted April 22, 2021 Share Posted April 22, 2021 9 minutes ago, Phill S said: Converting to 12v will be phase 2... watch out for this , the 24 volt wiring is thinner than the 12 volt version's ! Quote Link to comment Share on other sites More sharing options...
Phill S Posted April 23, 2021 Author Share Posted April 23, 2021 Thanks for the tip. Will follow up on a separate thread Quote Link to comment Share on other sites More sharing options...
Ross boyd Posted January 16 Share Posted January 16 Hello, I need to change my front seal to. Where ca. I order one please ? Thanks Quote Link to comment Share on other sites More sharing options...
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