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Old 11-04-10, 11:05 AM   #1
Combustor
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Default Coventry HDA

I own a Coventry Victor HDA, (aircooled flat twin diesel) presumably a MK1, as it has early type oil and fuel filters, and a complex governor linkage to the pumps. One injector pump is Bryce and one is CAV, both same displacement, but I think the rack travel is different for each. With a lot of slack in the linkage it runs very rough, but controlling the pumps by hand it can run quite nicely. Does anyone know what make of pump was original on MK1's? The other problem is major oil leaks round the perished rubber bellows on the racks. Is this the only thing that keeps oil in, or do I have a sealing problem in the pumps? One last query, were these motors supplied with mufflers, and if so, what type? Mine has an improvised 2 into 1 made of stainless flex tube.
Over to the CV experts, Regards, Combustor.
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Old 11-04-10, 11:13 AM   #2
listerdiesel
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The racks shouldn't be leaking any oil, the boots are there to keep dirt out mainly.

The engines would have come with either two individual pepper pot silencers or a twin manifold with single car-type silencer.

Either CAV or Bryce should be OK, as long as they are the right pump for the engine.

CAV applications on the first three selections here:

http://www.stationary-engine.co.uk/C...tion/fuel1.htm
BPF1A65AS6251 looks popular

Bryce here:

http://www.stationary-engine.co.uk/Bryce/Bryce1.htm
BKB53SD5286 looks popular

The numbers are different enough to question whether they are the same pump spec for CAV and Bryce.

There are some spec sheets here:

http://www.stationary-engine.co.uk/C...CovVictor1.htm

Peter
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Old 13-04-10, 02:43 PM   #3
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Default Coventry HDA

Thanks Peter for pointing me to the fuel pump info. Looks like I could match a pair of pumps by raiding one from a derelict WD2 I have here. Then to cure the oil leaks, anyone else solved this problem? Then that awful governor linkage will need some serious attention, oh well, keeps me off the street!
Regards, Combustor.
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Old 13-04-10, 04:14 PM   #4
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un derelict the wd2 while your at it they are superb engines!
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1947 D & F pumpset, 1943 close couple Lister Pumpset, 1931 & 1929 D types, 1929 Bruston D, 1930 Crossley 1030, 1942 Fowler PA, 1943 Fairbanks ZD, 1945 WD2, 1946 Bamford EG1, 1930 Superbloc 3hp, 1934 Conord F2, 1942 Ruston PT + driven equipment
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Old 14-04-10, 02:57 PM   #5
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Default Derelict WD2

Hello Matt,
Poor little WD2 could be a long project! It was recently given to me, origin unknown, after sitting outdoors for 30 odd years. Still turned over, but no compression. Pump and injector still OK, (amazing!) Took it apart, and there were bits of the top ring embedded in the piston, the big end bearing was a mess and the crankpin was scored and about .030" undersize. Also the imprint of both valves clear on the piston crown. A further stripdown made the story much clearer. The governor weight assembly was loose on its driveshaft, and not being driven. Seems the engine would have run at full ungoverned power till the bigend bearing failed and the piston was colliding with head and valves, breaking the top ring and land, then bits of ring lodged under valves, finally stopping it.
A tough motor alright. Most others would have launched a con-rod into space long before. You may therefore understand that its resurrection is no cheap option, and not top of my list. May just content myself for now with sorting out the HDA, and tidying up the old faithful AN4 that still powers my portable arcwelder.
Regards, Combustor.
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Old 14-04-10, 03:47 PM   #6
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Quote:
Originally Posted by Combustor View Post
Hello Matt,
Poor little WD2 could be a long project! It was recently given to me, origin unknown, after sitting outdoors for 30 odd years. Still turned over, but no compression. Pump and injector still OK, (amazing!) Took it apart, and there were bits of the top ring embedded in the piston, the big end bearing was a mess and the crankpin was scored and about .030" undersize. Also the imprint of both valves clear on the piston crown. A further stripdown made the story much clearer. The governor weight assembly was loose on its driveshaft, and not being driven. Seems the engine would have run at full ungoverned power till the bigend bearing failed and the piston was colliding with head and valves, breaking the top ring and land, then bits of ring lodged under valves, finally stopping it.
A tough motor alright. Most others would have launched a con-rod into space long before. You may therefore understand that its resurrection is no cheap option, and not top of my list. May just content myself for now with sorting out the HDA, and tidying up the old faithful AN4 that still powers my portable arcwelder.
Regards, Combustor.
oh dear.. i am after a wd1 or 2 actualy, i had a wd3 marine engine but it was too big and heavy ; )
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Old 14-04-10, 04:03 PM   #7
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Quote:
Originally Posted by Combustor View Post
I own a Coventry Victor HDA, (aircooled flat twin diesel) presumably a MK1, as it has early type oil and fuel filters, and a complex governor linkage to the pumps. One injector pump is Bryce and one is CAV, both same displacement, but I think the rack travel is different for each. With a lot of slack in the linkage it runs very rough, but controlling the pumps by hand it can run quite nicely. Does anyone know what make of pump was original on MK1's? The other problem is major oil leaks round the perished rubber bellows on the racks. Is this the only thing that keeps oil in, or do I have a sealing problem in the pumps? One last query, were these motors supplied with mufflers, and if so, what type? Mine has an improvised 2 into 1 made of stainless flex tube.
Over to the CV experts, Regards, Combustor.
I once owned a CV Vixen HDA. Photo can be seen in "My Albums" under the heading "Diesels I have owned". It came off an Army Field Generator and was fitted with 2 car type exhausts. I have a photo somewhere of it sitting on it's original transport, which sadly wasn't road worthy and wouldn't fit in the back of my van and was in Cardiff,so I had to leave it behind!!
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Old 19-09-17, 06:30 PM   #8
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This one is on my MK1...
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