Perkins 4108 Spares for coolant pump

[pcatterall]

I have a drip from my coolant pump ( not the raw water pump)
It looks like from the bearing area rather than from the seal.
On line I can see several new pumps ( one new on eBay for 90 odd pounds)
I cannot find repair parts and will appreciate any pointers ( Not ASAP or Perkins or Diesel spares 4U etc)
Perhaps I should just go for the ebay one?

 

[RichardS]

If water is dripping out then the seal must have gone. The bearings might have gone as well but you can check that by removing the fan belt and trying to wobble the fan. However, the problem is that many water pumps are pressed together and usually need pressing apart so, even if you could find the parts, unless you have a hydraulic press, then DIY refurbishment is not usually an option.

I've bought several car water pumps from sellers with a good rep on eBay and never had a problem.

Richard

 

[pcatterall]

If water is dripping out then the seal must have gone. The bearings might have gone as well but you can check that by removing the fan belt and trying to wobble the fan. However, the problem is that many water pumps are pressed together and usually need pressing apart so, even if you could find the parts, unless you have a hydraulic press, then DIY refurbishment is not usually an option.

I've bought several car water pumps from sellers with a good rep on eBay and never had a problem.

Richard

Sorry, poor terminology I meant the leak was not from the gasket seal area.
I have a puller to remove the pulley but, as you say, the rest of it is not simple even if I can get the spares.

 

[pcatterall]

Further feed back in case it is of use. I have removed a pump from another 4108,Outwardly identical but with a pulley diameter 25mm less.
I filled them both with water. My original pump was leaking water from a 4mm hole in the pump body normally hidden behind the pulley.
The 'new' pump has the same hole but does not leak. ( promising !!)
Examination of the diagram in the manual indicates that the hole in the body is into a cavity behind the shaft seal so it should be dry there.
Not sure if the hole is meant to drain any leak and preserve the shaft bearings or what.
There are 2 models of this pump and I am still not sure which of them mine is/are. The later type appears to have a secondary ( felt) seal beyond the cavity with the hole
and this may be to protect the bearings.
The earlier model has a 'thrower' in place of the secondary seal which may help divert water into the hole referred to.

Still no success finding replacement seals but I will persevere. Probably fit the 'new' pump and play with the other later!!
The earlier model has a 'thrower'

 

[jamiepyoung]

Have you spoken to Lancing Marine?

 

[RichardS]

Further feed back in case it is of use. I have removed a pump from another 4108,Outwardly identical but with a pulley diameter 25mm less.
I filled them both with water. My original pump was leaking water from a 4mm hole in the pump body normally hidden behind the pulley.
The 'new' pump has the same hole but does not leak. ( promising !!)
Examination of the diagram in the manual indicates that the hole in the body is into a cavity behind the shaft seal so it should be dry there.
Not sure if the hole is meant to drain any leak and preserve the shaft bearings or what.
There are 2 models of this pump and I am still not sure which of them mine is/are. The later type appears to have a secondary ( felt) seal beyond the cavity with the hole
and this may be to protect the bearings.
The earlier model has a 'thrower' in place of the secondary seal which may help divert water into the hole referred to.

Still no success finding replacement seals but I will persevere. Probably fit the 'new' pump and play with the other later!!
The earlier model has a 'thrower'

The hole is a feature of all the water pumps that I have ever seen and is a tell tale so that you can tell that the water seal has failed. I suppose that the logic is that you can then replace the pump at an early stage, whilst the engine is still usable, once you start to see drips rather than when the bearing fails and the pump seizes or disintegrates which would mean stopping the engine.

Richard

 

[rogerthebodger]

The hole is a feature of all the water pumps that I have ever seen and is a tell tale so that you can tell that the water seal has failed. I suppose that the logic is that you can then replace the pump at an early stage, whilst the engine is still usable, once you start to see drips rather than when the bearing fails and the pump seizes or disintegrates which would mean stopping the engine.

Richard

Totally agree there is a similar telltale on the jabsco raw water pumps between the oil and water seal.