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200 Series General Forum for the Volvo 240 and 260 cars |
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Any Advice, Part 2!Views : 46689 Replies : 671Users Viewing This Thread : |
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Nov 6th, 2020, 10:06 | #171 | |
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I think I'd just cut and posted the instructions from something Dave (LS) had sent me as an aide memoire. Alan |
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Nov 6th, 2020, 10:16 | #172 |
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Thanks Alan - I'd been wondering the same, my concern is, not really knowing what we're doing/ need, once it's off the car we can't drive it and that could end up being a long time with me at the helm! It's a shame, as I don't want the lad driving it with heavy/ inconsistent steering weight. But thinking about it now, it may be worth just pulling the new one apart to see what's inside - if that goes well, we could be on for a rebuild!
Dave - I went ahead and ordered the Eurocarparts one, free delivery, and it'll be here long before the next freeze unless something's gone very wrong with the forecasts! Thanks both, C |
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Nov 6th, 2020, 10:19 | #173 |
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Nov 6th, 2020, 10:51 | #174 |
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Nov 6th, 2020, 11:00 | #175 | |
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I'm guessing you could not return the replacement pump now, so you don't have anything to lose, and lots to gain, in taking it apart. I think I remember posting an illustrated parts diagram from the BofH for you, and it looked quite simple. Why don't you and your son take it apart on the kitchen table (it won't have any fluid in it) so you can see how it works and boost your confidence. If that goes well then maybe take the old pump apart and see if you can find out what is wrong with it. If it is not leaking then the most likely cause of loss of flow is probably a bearing allowing the tolerance around the impeller to get too large. Bearings are cheap and easy to replace. I would not be surprised if the internals of the new pump are much the same as the old one, so you might even be able to swap some parts over and get it working much better. If you manage to improve the old pump with some new parts (and particularly if you salvage them from the replacement) that would be entirely in the spirit of maintaining older cars. You and your son will surely have become proper members of the 'old car bodger's club'. :-) |
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Nov 6th, 2020, 14:19 | #176 | |
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Why not just fit the new PAS pump with the wrong size pulley (might need a bit of a tap to get it straight?) and a slightly longer (or is it shorter) belt? It won't make much difference to the pump running it a bit slower (or faster). Belts are cheap and available in lots of sizes, you could just measure the size you need with a piece of string (or calculate the difference in circumference between the old and new). Alan PS. Here is that diagram of the PAS pump, it is pretty simple: ... the only parts likely to wear out might be the bearing - part #8 (which will probably be something like a 6000 series caged roller) and the seal #5 (which is probably just an ordinary nitride shaft seal) - both would be available locally to you and cheaply (and you might well be able to remove them from the new pump if you don't fit it as I suggested above). You might have to replace a few O rings (get a box of mixed sizes), but there isn't much to go wrong with such a simple machine. Last edited by Othen; Nov 6th, 2020 at 14:29. Reason: Addition. |
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Nov 6th, 2020, 14:58 | #177 |
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Interesting diagram Alan, thanks! I must exhume my HBoF again and see what Fantasy they show for my PAS pump!
If that spring (or its equivalent part in mine) and valve is replaceable, i might just do it or if they are NLA, remove the plug and pre-load the spring with a washer or two to increase the pressure slightly as no doubt the spring will have grown weak over the 32 years and 228k miles.
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Nov 6th, 2020, 16:09 | #178 | |
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:-) PS. Chris, if you read this you could try the same. I don't know what is wrong with your pump (you probably say above, but I've forgotten) - if it isn't leaking and is just down on a bit of pressure you could try packing out part #20 with a spacer and see if that improves matters. If it does you have diagnosed the problem and just need a new spring. It is such a simple machine there aren't many other things to go wrong. Last edited by Othen; Nov 6th, 2020 at 16:13. |
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Nov 6th, 2020, 17:29 | #179 | |
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That said if the only pump capable of some sort of function due to the pulley situation is the original, it could well be worth a try!
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Nov 6th, 2020, 18:09 | #180 |
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I’ve forgotten what the problem was with the old PAS pump, and hence why he bought the new one. I should think there are two options, depending on what was wrong with the old pump, either: A. Fit the new pump with a longer/shorter belt. It might need a little bit of fettling, but that would work fine. B. Pack out the pressure relief valve on the old pump like you suggested and see if it works. If it does then that is the problem, so maybe just refurbish the old pump (a bearing and a nitride seal would cost about £6). ... other options exist of course, but they involve throwing money at the problem (so not what I would do, being a tightwad). Just my thoughts. Alan |
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