tom52
Active member
\"That\'s another fine mess....
hi
Like lots of others, judging by the number of posts, I have been struggling with a leaky sea water pump.
As a starting point I scoured this forums search pages and posted queries and was grateful for some helpful replies and the time, trouble and patience of all the contributors.But like always I learnt most from bitter experience.
I started off full of bright eyed optimism whipped off the cover and impellor pulled out he old seal, using the electricians small screwdriver ( as recommended, ... thanks) fitted my new seal (from Jabscoshop.....thanks) after first smearing the outer edge of the seal with Hylomar.( as recommended....oops ! )
As it turned out the b****** was still dripping so there then followed a period of struggling to get the pump off my MD2020 ( my sympathies to anyone else who has to do this job. I had to extend my toolkit and arms for that achievement).
The shaft was knackered. So armed with my new two legged gear puller ( thanks again ) I stripped down the whole pump, shaft, bearings,circlips,gear, locknut, the lot.
A voyage of discovery.
Then with the parts ordered from Jabscoshop (thanks again) I confidently turned to the only part of the job I had recent experience of, removing the recently replaced seal. But....
Hylomar had welded the rubber to the bronze. It needed to be scraped off. All the care I had taken the first time not to scratch the surfaces and now the only way to try and remove the welded rubber was by scratching and scraping.
It would have been impossible to change the seal in situ, and I was fortunate to have discovered the mistake when I had the pump on the bench with nothing but the bronze casing and the rubber seal, since the only method that finally worked was to burn the rubber off with a blow torch!!
So the moral of this tale and the experience I wanted to contribute is ........
never ever use Hylomar on water pump seals.
<hr width=100% size=1>
hi
Like lots of others, judging by the number of posts, I have been struggling with a leaky sea water pump.
As a starting point I scoured this forums search pages and posted queries and was grateful for some helpful replies and the time, trouble and patience of all the contributors.But like always I learnt most from bitter experience.
I started off full of bright eyed optimism whipped off the cover and impellor pulled out he old seal, using the electricians small screwdriver ( as recommended, ... thanks) fitted my new seal (from Jabscoshop.....thanks) after first smearing the outer edge of the seal with Hylomar.( as recommended....oops ! )
As it turned out the b****** was still dripping so there then followed a period of struggling to get the pump off my MD2020 ( my sympathies to anyone else who has to do this job. I had to extend my toolkit and arms for that achievement).
The shaft was knackered. So armed with my new two legged gear puller ( thanks again ) I stripped down the whole pump, shaft, bearings,circlips,gear, locknut, the lot.
A voyage of discovery.
Then with the parts ordered from Jabscoshop (thanks again) I confidently turned to the only part of the job I had recent experience of, removing the recently replaced seal. But....
Hylomar had welded the rubber to the bronze. It needed to be scraped off. All the care I had taken the first time not to scratch the surfaces and now the only way to try and remove the welded rubber was by scratching and scraping.
It would have been impossible to change the seal in situ, and I was fortunate to have discovered the mistake when I had the pump on the bench with nothing but the bronze casing and the rubber seal, since the only method that finally worked was to burn the rubber off with a blow torch!!
So the moral of this tale and the experience I wanted to contribute is ........
never ever use Hylomar on water pump seals.
<hr width=100% size=1>
