Fan Pully to water pump Morris series 2 803cc 1954

[soilman]

Hi, can’t get the pulley to sit firm, woodruff key worn and channel slightly damaged, so to much play and causing noise when driving.
Still working, and driving the fan and pump, any advice where can get parts or fix?
See photos
Did take the cast iron pump off and it’s working fine.

[oliver90owner]

If the woodruff key is worn, replace it. If the keyway is unserviceable, another can be cut. If the woodruff slot on the shaft is unserviceable I expect another could be cut on the fanshaft.

The second and (particularly) the third might be more expensive than replacement, unless you have a broach (or some means of cutting a keyway) for the second, and a milling machine (or lathe with milling attachment) for the third.

Is the boss removable? That might make a repair fairly straightforward on that bit. Second hand parts are likely available. Driving with it loose will only worsen the problem.

Good luck.

[IslipMinor]

If the key is that worn, what about the rest of the pump? I have never seen the impellor flange removed before and the water pump is not designed to be repaired. A new pump is around £20.

[philthehill]

https://www.moss-europe.co.uk/shop-by-m ... minor.html

https://www.ebay.co.uk/itm/new-water-pu ... Swh1pZ5xy9

MMOC spares may have a new or reconditioned unit available.

The original cast iron water pump with the woodruff key secured fan mounting flange was designed for repair. See BMC MM wksp manual section DD for details.
Unless you have the tools to do the job it is better to purchase a new or reconditioned water pump.
The later water pumps can be repaired - see section DDD1 for details - but it is not a job for the home mechanic.
What I have been finding lately is that with some later after market water pumps the clearance between impellor and pump body is excessive - see section DDD1 for details - and needs to be carefully adjusted using a press.

[myoldjalopy]

The 803cc water pump is different to the 948 and 1098 models and, as far as I am aware, have only been available as reconditioned units for a long time (unless you can find a NOS one). ESM sell them but expensive: http://www.morrisminorspares.com/coolin ... ge-p829598
Maybe someone has one on an old 803cc engine lying about - you could post in the 'wanted' section here if you can't repair yours satisfactorily.
I suspect Phil's link shows the 948/1098 pumps.

[soilman]

Hi, the slot to receive the key is worn, the key looks worn, and the slot in the flange is damaged at one end, so basically it’s not a good fit and becomes loose in operation. The water pump is a reconditioned cast iron fitted last year, and I took it off and it seems fine, no play or leak.

[philthehill]

myoldjalopy
You are right in that the water pump for the 803cc engine is different to the later 948cc/1098cc water pumps.
The MOSS link was posted as a generic item as regards the MM cooling system.
The second link shows a 803cc water pump but even though the price is high it is not that unusual because of the rarity effect.

Soilman
The pump fan boss, pump spindle and Woodruff key as shown above are only fit for the scrap bin.
It will be no good buying a new water pump unless a new fan mounting boss and Woodruff key are also fitted. The wear to the original fan mounting boss is not acceptable and if fitted to a new pump will have a detrimental effect on the life of the pump.
I would agree with myoldjalopy's post above that a S/H unit may be the easiest option (if only for the fan boss) but do not discount asking MMOC club spares.
Phil

[RobThomas]

TIG could fix both of those parts but the cost would be about the same as getting a secondhand one unless you can save postage and find a friendly TIGger.

[soilman]

The water pump is a recon from Esm, many thanks for the help

[philthehill]

Whilst the boss and the pump spindle may be repairable by Tig welding - the pump would have to be stripped before welding and the Woodruff key slots in both the pump spindle and fan boss would have to be recut to suit the new Woodruff key.
Carrying out the above operations is not economically viable and should only be considered as a absolute last resort.

[oliver90owner]

Please introduce me to the person that can guarantee no distortion while welding up that shaft, unless at least welding on the other side as well. It will likely bend sufficiently to need the whole part welding, then remachining and threading,

If no other part were available, I would repair, as I posted earlier. Looking at the parts, they might need to be refitted with a suitable grade of high strength loctite, then set about finding a replacement at leisure. Existing key slots would simply be filled with a high strength metalistic filler. Tig welding the boss to the shaft would be another ‘once only’ repair, too.

[RobThomas]

https://www.youtube.com/watch?v=BxF5txia_ZQ

I've done TIG brazing with bronze rods to fix holes in cast iron manifolds but lack the pedalling skills of these guys.

h2mm1.png (672.59 KiB) Viewed 1463 times

Here is a bit of TIGgery on a cast iron inlet with, IIRC, nickel rods.

[soilman]

managed to get a second hand boss flange, recon pump c/w woodruff key from ESM