Split Pin
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Posts posted by Split Pin
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Your primary filter is on the suction side of the pump so you wont get any fuel to bleed out of the filter.
Up to a point the system will self bleed as there is a return to tank from the on engine secondary filter.
To manually bleed out the system there are 2 bleed points on the injection pump. one either end facing out at 45 deg just below the top of the pump where the sprayer pipes are attached.
The one in the video is on the delivery side of the lift pump
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I had the same problem with a 750 fitted to a Gardner 3LW, although my tick over is 300rpm the engagement was very fierce, this is the root of the problem, when engagement either forward or reverse is selected the clutch engages rapidly without slipping, the propeller is accelerated up to speed, because there is virtually no load at this point the propeller continues to accelerate and reverses the backlash in the drive train before everything settles down hence the engagement noise. Like others I had spoken to PRM,s technical man who was very helpful suggesting that the twin accumulator modification should sort the problem, at this time the idea was very new and had been developed by a Dutch Company, another suggestion was to fit a Trolling Valve typically used in fishing boats, this allows the engine to be run at higher rpm for running ancillaries but allows the drive to be set at a lower level, the trolling valve is a proportional hydraulic valve which in its basic form switches on and off rapidly so engaging and disengaging the clutch. A soft start valve is probably the same thing now sold under a different title.
I didn't like the price of either of the options at that time so set of to develop my own version , After a few experiments I found that engagement was quiet if the initial pressure was reduced to 80-100 psi. So I built a valve block that integrated a 100psi relief valve and a 2 position electrically operated valve which I fitted it into the oil pump circuit, In neutral the valve is held open. So the oil pressure is restricted to 80/100psi on engagement. The valve closes after a time delay once ahead or astern is engaged when full pressure is then applied. When the gearbox oil is cold engagement is silent. When the oil gets hotter it will on occasions knock but nowhere as heavily as without the modification. It has been on now for around 20 years without any problems.-
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When setting the tickover follow the instructions in the manual very carefully. It is set by the flanged nut on the end of the governor housing, not the screws on the throttle lever. The rack buffer (the hex screw as seen in the pic above from Chris) needs to be carefully set as well particularly when the tickover is set to 320 rpm as per the manual..
The spring that is fitted looks like it was for a 6LW where it has to do much more work, I assume that you have ordered this one https://gardnerspares.com/product/spring-rack-bar-2-point/
Where is your boat moored? I may be able to help.
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If it’s a South African repatriation then it will have been fully overhauled by someone, unless it sounds like it’s falling apart and burning oil when running there is little to be bothered about. Minor oil leaks from the block to crankcase and block to cylinder head are the most common issue , there are plenty of pipe connections that can leak but once sorted are usually ok. There are quite a few 70 footers with 2LW’s fitted, at 28bhp they are more than up to the job on rivers. Like any old engine there can be issues with corrosion, The water rails are common areas where corrosion can cause failure.
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9 hours ago, TheCoot said:
Was the bearing failure due to a lubrication fail, or was it a faulty end shell?
Don't really know why it had failed, given the level of bodging, it was probably due to being very poorly assembled, maybe even bad regrinding, when I checked the bearings and crankshaft there was more taper in the grinding than the specified clearances for the bearing!
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3 hours ago, MtB said:
It needed it anyway. Look at the state of that left hand big end journal..!!
It sure did, it was from a South African rebuild, it had done very little running after a rebuild before the big end failed, there were bits of shell bearing lying around the sump.
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3 hours ago, Tracy D'arth said:
What dedication to answer a forum question! Not many would tear down their engine to make a post.
In true Blue Peter style "One I prepared earlier"
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They are 180 deg.
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2 hours ago, David Mack said:
We were on the BCN Challenge a few years ago, going up the Rushall flight until we got to the long pound which was well down and Fulbourne went hard aground. Ferrous came up the lock behind us, managed to get past and took us in tow. Given that it must have a lesser draft than Fulbourne there must be a pretty big prop behind Ferrous's 5LW. Because we were dragged along the rest of the pound at reasonable speed - shake, rattle and roll as we bounced our way over bricks, rocks and goodness knows what else. A good job we didn't know at the time quite how thin some of Fulbourne's bottom is!
Ferrous has a 24" X 20" prop. Edwin made a mould from an older Bolinder Blade which was probably ex Claytons of Oldbury. Then Cast his own propeller. Its driven by a 3LW and 1.5:1 gearbox so plenty of oomf!
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When it was possible to have it as a tender Edwin took it all over the system, once the licensing changed it was put into storage at the family home. If my memory is correct it was originally fitted with an LE Velocete engine. It is now fitted with a 2cl Kubota, Don't know how the licencing system updates but it probably has a one month licence to cover the BCN challenge.
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6 minutes ago, BlueStringPudding said:
This is what I'm talking about:
That is an enots fitting and if you had the correct spanner it would have 3/16" or 1/4 whitworth stamped on it depending on the pipe size
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Perhaps this will tempt some to visit taken in 2011
We usually refer to it as Middle Earth Country
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It maybe that the easy one was already towards the end of the fuel element travel in which case it wouldnt be in a position to let more fuel in so nothing to pump. If the engine is running correctly there is probably nothing to be concerned about. You might try it again now that the engine has been running and see if it is the same or if it is now about the same as the other one.
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When Gardner reintroduced the 2LW they supplied them with a PRM260. The official tickover is set at 410rpm but can be reduced to 330rpm I have not heard of anyone having a problem with the clutches slipping. I have a PRM750 on a 3LW with the tickover set at 310 rpm it has been installed for around 20 years without any problem, we also have a PRM500 attached to a 3LW which has done over 12,000 hrs, it was stripped a couple of years ago for inspection, the clutch plates showed hardly any sign of wear. You only need full clutch pressure to deliver max power so any shortfall of pressure at lower rpm is generally inconsequential. I have also had a PRM 160 fitted to a 3LW that was transfered to a Perkins 3 Cly and is now on a 2LW, it is now comming up to 37 years old and is still on its original (sintered bronze) clutch plates. The more common problem with slow tickover is gearbox rattle, this can be overcome by fitting an R&D high deflection drive plate.
Steven
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7 hours ago, Captain Pegg said:
I did anticipate that some more learned members than I may take issue with that statement but I think in general it's true and also that perhaps no company ever officially named it's canal. For instance what would the boaters and public naturally call the canal that went to Oxford and displayed notices bearing the legend 'Oxford Canal Company'?
That would explain the variances i.e. there is no absolutely right or wrong name of any canal.
I completely agree with your points on the BCN, the Stourbridge is BCN and the B&F isn't by environment. Although in other ways - such as lock furniture - the B&F is more BCN than the Stourbridge, which has a kinship with the Staffordshire & Worcestershire Canal. There are ultimately no rules for what a BCN canal looks like other than the one defining feature - that the canal was owned by the BCN. It also brings to mind that while I was cruising the Birmingham & Warwick Junction recently (whose name strangely reverses order of the main line, the Warwick & Birmingham) my father kept referring to it as the Saltley Canal which is how we referred to it when we first went that way in the early 80s. He had great trouble trying to comprehend which canal we were on as we traversed through Salford, Bordesley, Proof House, Aston and Farmers' Bridge junctions to finally arrive at that place whose name has filled an entire thread on the forum.
The Stourbridge Canal was never a part of the BCN. The propreiters were the Stourbridge Navigation Company. At one time there was a BCN boundry marker next to the road bridge at the bottom of the Delph Locks
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CAV manual says 12cc of oil, it soaks into a felt pad. It should ideally be done a couple of times a year
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I get about 4000 kWh per year from 4 kW instalation in the West Midlands and four of my panel face South East rather than directly south.
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Most domestic calorifiers are of the indirect vented type, the cold water feed is from a seperate stoarage tank, and they have a vent pipe back to the header tank, these are typically rated at 10 mt head of water which equates to 1Bar or 15 PSI.
It is possible to use a vented type in a marine situation, but the system need to work at the appropriate pressure.
Steven
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24 minutes ago, MtB said:
Which of course depends which end the flywheel has been fitted! Or did you mean for the Gardner LW specifically?
I was answering your question about LW's
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3 hours ago, MtB said:
Ahem, modern engines rotate backwards!
The Gleniffer, viewed from the helm and looking forwards along the length of the boat, rotates anti-clock and has a LH blade, as does my Samofa. The kelvins, being a forward-looking company rotate clock though, as does your JD3 IIRC.
Anyone here know which way a Gardner LW rotates? It's not easy to tell just by looking at one, as the flywheel is enclosed.
LW'S were available in handed pairs if required so it all depends on where it originated from.
Normal roation is clockwise when viewed from the non flywheel end
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My family has two boats with 3LW's and 2:1 gearboxes one is is 50 ft the other 58ft both are fitted with the same prop as in the picture. They are 23" X 23" and as can be seen are are of a large blade area. Normal cruising revs are 500, max revs are 1000, Almost never use anything over 750rpm. Boat stops within its own lengh in deep water. Although you cannot fit 23" dia the nearer you can get will give you a good result.
Steven
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A couple of pages about the Pelapone from British Diesel Engine Catalouge published in 1950
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Jasmine at the Stourbridge Rally Photo By Alan T Smith
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The knurled silver knob doesnt look like an original part, that is where the breather is usually located. The dipstick should be attached to the square headed plug as shown in photograph 1, it is part of the plug and can only be found when the plug is removed, the drain plug is not visible on either of your photographs it is in the centre underneath nearest the flywheel. The plug shown with the blue arrow is on the hydraulic pressure circuit and is normally used with a trolling valve. The large Hex plug on the side in pic 2 may have a filter behind it on the suction pipe inlet, dont know when they started to fit them but my 750 has one
Jasmine at the Stourbridge Rally Photo By Alan T Smith
Where is it?
in History & Heritage
Posted
A photograph of an X craft used during the war years, The photograph looks to be a lock on the Aire and Calder but which one?