Author Topic: Resurrecting a boat diesel engine - Ford Lehman  (Read 14881 times)

Offline photoman290

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Re: Resurrecting a big diesel starter?
« Reply #30 on: April 17, 2013, 12:52:26 AM »
i saw my old tractor mechanic down the pub and asked him about the vacuum problem. he said the pump is controlled by a pneumatic system. there should be 2 pipes that go to the inlet manifold one on each side of a butterfly. the pipes are steel and get blocked up with rust. the rubber  diaphragm also rots. it is about £20 for a new one. it may be different on that engine to the tractors but worth checking. he said change the pipes to copper. it is the same engine as on a fordson major.

Offline Tony

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Re: Resurrecting a big diesel starter?
« Reply #31 on: April 17, 2013, 07:11:39 AM »
Thank you. We'll have a good look today and check.

Offline greasemonkey

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Re: Resurrecting a big diesel starter?
« Reply #32 on: April 17, 2013, 08:55:02 AM »
If it is a Major engine, then it is a 3.6L, or a 3.3L. As far as I know anyway. Obviously the marine version could differ. I agree the engine in the vid certainly looked like a Major engine.

There are two ways they like to self destruct. One is the butterfly in the inlet manifold jamming open. ( or some loony tunes not tightening the inlet manifold up properly), or what Bob says, air getting in behind the butterfly. Or the pump jamming. I've had both happen, but saved it both times by slipping it into gear. Bit more difficult with a boat.

Good about the starter, thought it could be a lot worse than that.
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Offline Tony

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Re: Resurrecting a big diesel starter?
« Reply #33 on: April 17, 2013, 10:06:55 AM »
I think this one has a later injection pump on it (says CAV on the end IIRC), as it has the control cable to the pump not the manifold, and there aren't any pipes between it and the manifold.

Hopefully now that the battery has charged the starter will turn her over, will find out at lunchtime - fortunately the journey back to work from the boatyard goes past the pub I need to pick up from :)

Will also be looking for the elusive date codes...

I do know it has had a Bowman conversion (water cooled exhaust?) though not clear on when this was done.  It also seems to have a Jabsco water pump for the seawater.
« Last Edit: April 17, 2013, 10:10:11 AM by Tony »

Offline Tony

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Re: Resurrecting a big diesel starter?
« Reply #34 on: April 17, 2013, 01:43:32 PM »
Well we got her turning on the starter and wired back to the boat electrics so it'll turn by key.

http://www.youtube.com/watch?v=3eWhr_D9-5o

We put the rocker cover on over after that so the sprayed oil would just run down to the sump, and did multiple runs filling the pots and inlet with WD40 between each one.

No oil filter fitted, just a hole in the side of the engine with a bucket under it - what came out was water with oil on top so clearly still a load of water in the sump which will need to be drained properly.

Offline Tony

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Re: Resurrecting a boat diesel engine - Ford Lehman
« Reply #35 on: April 19, 2013, 01:17:10 PM »
Slight problem - she's sinking!

We noticed the hull's water inlet for the engine was a bit... loose.  Not good as that keeps the sea out.  Disturbing it must've let it slowly leak water in.

The boatyard are going to crane her our and pressure wash the greenery off the hull.  They want to do it pronto as if a boat goes down they have to inform the Environment Agency what manner of pollutants will be washing downstream - and there's a fair bit of oil/diesel in the bilge.

Offline greasemonkey

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Re: Resurrecting a boat diesel engine - Ford Lehman
« Reply #36 on: April 19, 2013, 05:17:31 PM »
Oh dear.............
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Offline julesandtash

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Re: Resurrecting a boat diesel engine - Ford Lehman
« Reply #37 on: April 21, 2013, 08:27:35 PM »
I reckon it would have looked good with a small flame next to it to ignite those clouds of WD40 being blasted out of the cylinders - would be like a top fuel drgaster
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Offline Head Womble

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Re: Resurrecting a boat diesel engine - Ford Lehman
« Reply #38 on: April 23, 2013, 10:08:48 PM »
I reckon it would have looked good with a small flame next to it to ignite those clouds of WD40 being blasted out of the cylinders - would be like a top fuel drgaster

That would look great in the dark.
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Offline Tony

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Re: Resurrecting a boat diesel engine - Ford Lehman
« Reply #39 on: April 26, 2013, 10:07:47 PM »

Offline greasemonkey

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Re: Resurrecting a boat diesel engine - Ford Lehman
« Reply #40 on: April 26, 2013, 10:17:06 PM »
Tidy tidy. Well done. Nothing like the warm glow of staisfaction that comes from reviving something mechanical. Is that a hydraulic pump on the back, or is there a shaft running out to a prop? Both maybe. Just out of curiosity.
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Offline CHUNDER

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Re: Resurrecting a boat diesel engine - Ford Lehman
« Reply #41 on: April 26, 2013, 11:00:12 PM »
It would have been far beter to strip and rebuild it if the rest of the craft is servicable I would still strip it down as it is it is a very unknow quantity

Offline Tony

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Re: Resurrecting a boat diesel engine - Ford Lehman
« Reply #42 on: April 27, 2013, 11:32:50 AM »
Clearly bits of the engine had been apart - starter was loosely bolted on, hammer marks and a broken mount casting on the IP so there was some doubt over whether it was a runner, so really we just wanted to establish that before he invested time and effort in bits for it.  Parts can be quite expensive (recon starter - £240!  :o) so imagine the cost of an injection pump.

The IP also had a stripped drain port (they're supposed to be oil filled and changed every 50 hours), so it may have been idling badly without oil in the IP.  So we've bodged up a bigger bolt with PTFE - it'll need to come off and be re-tapped.   But at least it has oil in it now.

As mentioned before the starter had a shorting cable in it, so perhaps it wasn't starting for the previous owner and running badly when it did.

Now we know it runs it can have some more TLC - though it's a big ol' beast, I'm sure as-is it would happily run for a very long time.

The hydraulic pipes at the back are from the gearbox (in turn driving the propshaft). They carry oil to a multi-core heat exchanger in the water pipe you can see running front-back on the left.  At the moment it has no water circulating as the water pump had broken fins on the impeller, which has been removed.  The gearbox oil was all creamy so we've detached one of the cooler pipes and let the engine pump the box dry.  Suspect water got in through the dipstick hole (or the heat exchanger leaks!)

Bleeding the air out of the fuel system was pretty tricky - but yes, satisfying to hear the ol' gal running. :)
« Last Edit: April 27, 2013, 11:51:34 AM by Tony »