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PeterN
United Kingdom
240 Posts |
 Posted - 04/11/2016 : 21:14:58
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Just for interest.........Having at last managed to remove the oil pump for inspection, I am impressed that it has a serial number neatly stamped into the body. Is there any significance in the number (17G671 Y). Always so nice to see components numbered.
Peter
1930 M type MG 748
2M/1506 |
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Colin McLachlan
United Kingdom
991 Posts |
Posted - 05/11/2016 : 10:39:55
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Quite a fancy font for such a mundane item.
Colin
Markinch, Fife.
PA 0613
MG3242
Register No. 2591 |
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davies
United Kingdom
699 Posts |
Posted - 06/11/2016 : 10:10:45
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| mundane ? it is the heart of the machine - Rich |
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PeterN
United Kingdom
240 Posts |
Posted - 06/11/2016 : 20:49:10
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None the less, I agree it is an impressive bit of stamping. Any other examples? Does anyone know the breakdown of the code
Peter
1930 M type MG 748
2M/1506 |
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Jon Pedoe
United Kingdom
56 Posts |
Posted - 08/11/2016 : 20:27:36
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| Forgive me, but it may be the pattern number, and not made by stamps into the cast pump body - only a thought, jon |
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PeterN
United Kingdom
240 Posts |
Posted - 08/11/2016 : 21:35:32
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I wondered the same Jon. I emailed the picture to S&V for a different reason and Mike made the comment that "the numbers indicate an early pump". Does anyone else have a number from their pump to offer?
Peter
1930 M type MG 748
2M/1506 |
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Blue M
United Kingdom
1472 Posts |
Posted - 09/11/2016 : 08:35:07
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If it's an early pump, and it certainly looks like it, it would explain the low pressure. These pumps have gears half the depth of the later ones. I suggest you advertise for one before doing anything to the one you have. Fortunately the later ones are more common than the early M/Minor ones.
Ian |
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Malcolm Eades
United Kingdom
379 Posts |
Posted - 09/11/2016 : 10:49:44
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Peter,
You would do well to fit a later J Type pump, which, as Blue M says, is deeper, so pumps more oil per revolution. If you struggle to find one, I suggest you ask S&V if they still supply their adapter plate, which fits between the body and the lid and enables you to fit the later, deeper rotor gears.
Malcolm
M Type
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Blue M
United Kingdom
1472 Posts |
Posted - 09/11/2016 : 11:45:33
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Malcolm,
I think the J pump, although it has the same size gears as the later M, has larger pipe unions.
Ian |
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Malcolm Eades
United Kingdom
379 Posts |
Posted - 09/11/2016 : 13:11:17
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Ian,
Maybe so, but I still think it's a worthwhile mod. I get the impression quite a few Ms have it.
Malcolm
M Type
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Blue M
United Kingdom
1472 Posts |
Posted - 09/11/2016 : 20:07:40
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Malcolm, it's not really a mod since it's the same pump as most M Types. My point was that the inlet pipe is bigger on a J so it isn't a simple swap - unless you fit a J sump etc.
Ian |
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PeterN
United Kingdom
240 Posts |
Posted - 09/11/2016 : 20:55:00
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S&V do still supply the adaptor plate with 9/16" gears. Having seen that my current pump seems in very good order (max 001" clearance between gear diameter and pump body together with flush gear height to body) I'm now planning to overhaul the rear and main bearings.The 9/16 gears seem a good mod though. Thanks for the comments
Peter
1930 M type MG 748
2M/1506 |
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Blue M
United Kingdom
1472 Posts |
Posted - 09/11/2016 : 21:36:01
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| Peter, your pump even in good order is pretty feeble, which is why it was soon replaced with a larger one. Having new bearings makes no sense if you don't alter/replace the pump, so why not do the pump first? Then you will know whether the low oil pressure is due to worn bearing or the small output pump. If it turns out just to be the pump you will have saved a lot of time and money. |
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