Colleagues,
I've been having some problems, as some of you may know, with my Low-Light 1950 project.
When refitting the C40 dynamo, that came with the car, I had to add about 4/5 washers to take up the gap.
C39 and C40 dynamos should be 145mm (approx) between the mounting plate holes.
I have checked my 1951 side-valve High-light (with the original aluminium water jacket/dynamo mounting) and the spacing is 145mm.
All my spare dynamos (both C39 and C40) are all 145mm, so I have, just now, measured the (what I took to be original) aluminium water jacket/dynamo mount on the Low-light and it is only 137mm
You should be able to see the pile of washers (just about) at the front mount.
My ESM repro is 145mm (but the threaded bolt holes are the wrong size (UNF instead of Metric 8 Fine).
So what on earth is on my 1950 side-valve? Anyone, out there, have any comparable measurement?
I know the earlier engines had an extension to the head casting, where the dynamo was fitted - but what was the spacing on that?
Has mine been ground down for some reason?
Any information gratefully awaited,
George.
P.S. this engine originally had a blanking plate where the water pump is now fitted.
Dymano Mounting bracket width discrepancy
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Dymano Mounting bracket width discrepancy
'50 Low-light with 918 Side-valve engine,
'51 High-light with Side-valve 918 engine,
'55 4-dr with 803 engine,
'56 Traveller with 1098 engine.
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- Minor Maniac
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Re: Dymano Mounting bracket width discrepancy
A common problem even on the 'A' Series. It is not unusual to have to pack with washers between the dynamo mount flanges and the mounting bracket.
Re: Dymano Mounting bracket width discrepancy
The original dynamo for an MM was a C39PV , maybe the end bracket thickness or the length of the body was different to the later C40 dynamo. Will measure my water jacket on my low mileage MM engine tomorrow.
Bryan
Bryan
1934 Morris 10/4 in Dark Green / Black - BGO517
1953 S11 Traveller in Birch Grey - oldest survivor ? Export model now reg PPO924
1953 S11 Traveller in Black - 3rd oldest in UK PPX344
1953 S11 Traveller in Birch Grey - oldest survivor ? Export model now reg PPO924
1953 S11 Traveller in Black - 3rd oldest in UK PPX344
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- Minor Fan
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Re: Dymano Mounting bracket width discrepancy
Hi George,
just measured my water jacket & it is 145mm & fitted to it is as Bryan stated above a C39PV dynamo which fits great.
Regards
Brian R
just measured my water jacket & it is 145mm & fitted to it is as Bryan stated above a C39PV dynamo which fits great.
Regards
Brian R
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Re: Dymano Mounting bracket width discrepancy
The water jacket bracket on my 1951 High-light is 145mm
Only the low-light mount is the wrong size.
and it has the original dynamo with the rad fan mount on the end.Only the low-light mount is the wrong size.
'50 Low-light with 918 Side-valve engine,
'51 High-light with Side-valve 918 engine,
'55 4-dr with 803 engine,
'56 Traveller with 1098 engine.
Re: Dymano Mounting bracket width discrepancy
Just measured my water jacket. It is 145mm.
If anyone needs one we have an old engine I can take it off.Half of ESM's price !!
Bryan, MMOC Club Spares
If anyone needs one we have an old engine I can take it off.Half of ESM's price !!
Bryan, MMOC Club Spares
1934 Morris 10/4 in Dark Green / Black - BGO517
1953 S11 Traveller in Birch Grey - oldest survivor ? Export model now reg PPO924
1953 S11 Traveller in Black - 3rd oldest in UK PPX344
1953 S11 Traveller in Birch Grey - oldest survivor ? Export model now reg PPO924
1953 S11 Traveller in Black - 3rd oldest in UK PPX344
-
- Minor Addict
- Posts: 978
- Joined: Thu Oct 04, 2012 5:01 pm
- Location: Farnborough, Hampshire
- MMOC Member: Yes
Re: Dymano Mounting bracket width discrepancy
So were earlier engines fitted with different sized dynamo mounting?
8mm is quite a difference.
Phil, I too have noticed discrepancies in the mounts of the A-series engines. I also remember, years ago (probably not a Morris) of having a C39/40 dynamo with a built-in extension tube!
Looks like I'll have to find a "spacer" that is easier to fit then 4 lose washers.
Many thanks for the answers,
George.
8mm is quite a difference.
Phil, I too have noticed discrepancies in the mounts of the A-series engines. I also remember, years ago (probably not a Morris) of having a C39/40 dynamo with a built-in extension tube!
Looks like I'll have to find a "spacer" that is easier to fit then 4 lose washers.
Many thanks for the answers,
George.
'50 Low-light with 918 Side-valve engine,
'51 High-light with Side-valve 918 engine,
'55 4-dr with 803 engine,
'56 Traveller with 1098 engine.
-
- Minor Maniac
- Posts: 10856
- Joined: Thu Jul 19, 2012 12:05 pm
- Location: Hampshire
- MMOC Member: Yes
Re: Dymano Mounting bracket width discrepancy
Looking at the original photo the front mount appears to have been ground back to allow a dynamo of unknown style to be fitted.
Look at it this way - having the washers (front or rear) allows you to centralise the dynamo pulley in line with the crankshaft which is just as important than having the correct mount.
I remember those dynamos with the tube in the rear plate which allowed a degree of adjustment for centralising of the dynamo and using a variety of dynamo mounts. Nearly all alternators these days are fitted with the adjustable sliding tube in the rear mount plate.
Phil
Look at it this way - having the washers (front or rear) allows you to centralise the dynamo pulley in line with the crankshaft which is just as important than having the correct mount.
I remember those dynamos with the tube in the rear plate which allowed a degree of adjustment for centralising of the dynamo and using a variety of dynamo mounts. Nearly all alternators these days are fitted with the adjustable sliding tube in the rear mount plate.
Phil