940 windscreen washer

[Laird Scooby]

Originally Posted by mike1950

Attachment 121038

The T shaped valve with the red top which feeds the window washer.There is a rubber diaphram inside which perishes.This then stops water to the washers.
Take the valve off and you will see a small hole in the red top-something someone else can explain to me,it's an air hole by which the Volvo sorcery works.

Take a fine blade between the red top and the black body and gently lift and the red top will pop off.
I use a very thin rubber disposable glove to cut a small piece to make a new diaphram.Make it too big then stretch over the hole and a good steady push with the thumb and the red top will click back on.

Have tried to upload a photo of the spare I carry---probably won't show.But it does'nt need to be a neat job.Bet you find it works

Originally Posted by mike1950

Attachment 121039

Hopefully view of the valve from below.
The blue is the rubber glove diaphram--you of course are allowed to trim it so that it looks nice.

Ah, the lesser-spotted Australian-edition washer T-valve!

The red part is meant to be on the underside Mike. The hole is meant to be there and the valve is designed to leak through the tell-tale hole when the non-return diaphragm fails.

I'm all for saving money but i think your method is a false economy :

https://www.partsforvolvosonline.com...oducts_id=3177


For the sake of a couple of quid, you remove the old one, bin it, fit the new one (the correct way round with the red part underneath - yes, the feed pipe is meant to cross over the jet hose) and over the course of its lifetime, you save the £2 in reduced petrol consumption from not having to carry the extra few grams of weight for the spare valve. Not to mention the cost of your time spent faffing about with a pair of rubber gloves and indeed the cost of those rubber gloves.

This doesn't take into account the non-return valve is meant to work correctly with the pressure being delivered from the pump, too much back pressure from the valve and it could shorten the life of the pump as well.

[Ian21401]

My 1992 940 doesn’t have one of those valves at the windscreen end near the scuttle, just a normal T piece, but it does have one behind the nearside headlamp where the tubing from the pump splits to feed the two headlamps. It leaks through the hole in the top after using the washers. Not sure whether this is supposed to happen. Haven’t been able to source a replacement yet.
Opinions please?

[bob12]

Originally Posted by Ian21401

My 1992 940 doesn’t have one of those valves at the windscreen end near the scuttle, just a normal T piece, but it does have one behind the nearside headlamp where the tubing from the pump splits to feed the two headlamps. It leaks through the hole in the top after using the washers. Not sure whether this is supposed to happen. Haven’t been able to source a replacement yet.
Opinions please?

No opinion but it's a similar set-up to my 1990 745.

[Laird Scooby]

Originally Posted by Ian21401

My 1992 940 doesn’t have one of those valves at the windscreen end near the scuttle, just a normal T piece, but it does have one behind the nearside headlamp where the tubing from the pump splits to feed the two headlamps. It leaks through the hole in the top after using the washers. Not sure whether this is supposed to happen. Haven’t been able to source a replacement yet.
Opinions please?

The one for the headlamp washer system is this one :

https://www.ebay.co.uk/itm/Volvo-440...e/293107610539

It's a different part and number because the outlets are smaller for the headlamp washer jets. If it leaks, it has failed so needs replacing.

If you don't have a Non-Return Valve (NRV) on the bonnet sreen-washer system, i'd suggest adding a normal NRV in the feed to the T-piece :

https://www.ebay.co.uk/itm/2-x-AQUAR...E/222659538025

As it happens, that's exactly the arrangement i have because my original T-valve gave up the ghost after the previous owner had bodged it. Car was going for MoT a couple of days after and couldn't rely on the post so needed a work-around. Still works absolutely fine.

[slowprop]

Originally Posted by Laird Scooby

Ah, the lesser-spotted Australian-edition washer T-valve!

The red part is meant to be on the underside Mike. The hole is meant to be there and the valve is designed to leak through the tell-tale hole when the non-return diaphragm fails.

I'm all for saving money but i think your method is a false economy :

https://www.partsforvolvosonline.com...oducts_id=3177


For the sake of a couple of quid, you remove the old one, bin it, fit the new one (the correct way round with the red part underneath - yes, the feed pipe is meant to cross over the jet hose) and over the course of its lifetime, you save the £2 in reduced petrol consumption from not having to carry the extra few grams of weight for the spare valve. Not to mention the cost of your time spent faffing about with a pair of rubber gloves and indeed the cost of those rubber gloves.

This doesn't take into account the non-return valve is meant to work correctly with the pressure being delivered from the pump, too much back pressure from the valve and it could shorten the life of the pump as well.

Yep the valve Mike showed is the one. I ordered a new one from Volvo main dealer near me cost £9.40 !!! I wish I'd seen your post first. Mind you with delivery @ £4.75 not much different I suppose. Ah well. Went to get it today paid for it and they had ordered the wrong thing. Showed them the part and am going back tomorrow to pick it up. Hopefully correct this time.

Thanks I hadn't realised the red cap should point down. I can just about manipulate the pipe that carries the water over the other pipe so that it does that.

[slowprop]

Thanks guys. All working good now.

[Laird Scooby]

Excellent news!