Windscreen washer pump

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paddington49

New Member
My NOS washer pump is very intermittent so decided to try to clean it in case it was blocked. However while taking it apaart the rubber impeller fell out. It appears to be in reasonable condition but I am not sure which way it should be inderted. The apparent obvious way is for the blades to be pointing to the left as the spindle rotates clockwise. However it now spins freely on a bench test but does not force the water out. I have read posts regarding the impeller deterioration so any help would be appreciated please. Thanks

Malcolm
 
paddington49 said:
My NOS washer pump is very intermittent so decided to try to clean it in case it was blocked. However while taking it apaart the rubber impeller fell out. It appears to be in reasonable condition but I am not sure which way it should be inderted. The apparent obvious way is for the blades to be pointing to the left as the spindle rotates clockwise. However it now spins freely on a bench test but does not force the water out. I have read posts regarding the impeller deterioration so any help would be appreciated please. Thanks

Malcolm
Click to expand...
have we tried reversing the impeller and retesting ?
 
I had the same result when trying to "fix" my screen pump.
Its a tiny rubber impeller and is only good for 50yrs so went searching for an upgrade.
I ended up sourcing a submersible fish tank pump and adapting it to fit the washer bottle. Picked it up off Temu or the like "for not worth the effort" finding an impeller to fix the original pump.
Once fitted its hidden inside the bottle and chucks out a good stream onto the screen.
 
Could be that the impeller blades are not flexible enough now to maintain a good contact with the body of the pump, so they will not develop any suction (pumping action). here should be some resistance to spinning when dry as the washer water acts as a lubricant between blades and body.
As it is unlikely that Rover will still be offering a new pump, or spares, GRT's solution is he way to go. Probably pump is not unique to Rover but has been used on many washer systems.
 
robin collis said:
Could be that the impeller blades are not flexible enough now to maintain a good contact with the body of the pump, so they will not develop any suction (pumping action). here should be some resistance to spinning when dry as the washer water acts as a lubricant between blades and body.
As it is unlikely that Rover will still be offering a new pump, or spares, GRT's solution is he way to go. Probably pump is not unique to Rover but has been used on many washer systems.
Click to expand...

Back in the day, they were available as a remote stand-alone pump, being riveted to a metal mounting bracket rather than the washer bottle cap. Made by Trico. The rubber impeller has done well to last 50 yrs, a modern equivalent would probably last 5 weeks.
 
I think it has been mentioned here in the past, these pumps were also used by Rolls Royce, and rebuilt kits are still available new in the respective suppliers. One should expect that they are priced accordingly though.
 
I have had good success with this style universal pump:
www.ebay.com

Universal Windshield Washer Pump Reservoir Kit Fluid Reservoir Tank Bottle C0D5 | eBay

1x Windshield Washer Fluid Tank with 12V Pump. Functon: clean windshield. 2x Nozzle Connectors. 2x Water Spray Nozzles. 1x Wiring Plug. 1x 1.5m Hose. 1x Dashboard Push Button Switch.
www.ebay.com

I can take a photo tomorrow so you can see what it looks like under the bonnet.
I managed to buy a replacement impeller from Scotts Old Auto Rubber about 20 years ago. I used this on one car which I wanted to keep as close to original as I could, and then used the universal one on my other car.
 
Many thanks to everybody who offered help. It is very much appreciated.
In the end I purchased a pump from Rimmers that sits on top of the bottle. I knew there was a problem with the old pump as I tested it using a 240v to 12v converter indoors. However the new pump when fitted, did not produce the expected results. Further investigation found that whoever had attached the water supply pipe to the wiring loom had made the cable ties to tight. I had never encountered these non working washers before as the car has never been used in the rain in my ownership!!.
Again thanks for all the messages

Malcolm






from Rimmers
 
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