Washers on my bus have never been brill with the stock set up . Says in the manual ..not Bentley couldn't find info in that, but in Haynes manual ...fill tank full then pump 40 psi in to tank . I have heard folks on here not to fill to brim otherwise it won't pressurise . When i pump the air to the tank ( not right full of water ) up to 10 psi it just leaks out of the valve and possibly out of the connection where you push the valve into the tube . All rubber pipework seems to be all soft and not perished and some water exits the jets ...all be it as impressive as 105 year old climixing . Water used to leak from the valve i think near the stalk but now has stopped doing that . Don't fancy changing the tank but certainly tempted to buy an electric pump from Just K and utilize the original tank ...anyone fitted one and are they any cop Thanks Ewan .
A rather worrying analogy. More worrying is that you might be speaking from experience...hence the analogy.
An electric pump is the way forward. The original system is not very good even when optimal. I’ve got one of the lookalike electric washer bottles from JK. Works a treat every time and looks original at first glance. Snotty’s all singing and dancing Swedish washer system is gold standard. Stirlingmoz
Another poss is an aftermarket tank and pump, behind the driver's seat. Run the hose under the mat? Trouble with the "torpedo tanks" is they don't actually hold much fluid.
I used the existing tank, fitted an electric pump near it and then fitted a microswitch in the steering wheel boss. The pump is noisy, but better than having water and electrics meeting up in the steering column
The JK one needed a pickup pipe fitting as the water only came into contact with the pump if the bottle was half full. You'd think they'd have noticed. The microswitch in the column is a good mod.
I have the original tank and a pump on its outlet bought from a car spares place, and a micro switch to replace the water valve in the windscreen wiper switch assembly. And a relay 99 installed to make it into a wash/wipe single pull on the lever setup. And for the original tank the physics of not filling it up to keep pressure makes sense.. if you double the air volume in the tank by letting water out, the pressure halves. So if you only leave a few CCs of air in there then as soon as you let out a matching volume of water the pressure has already halved. But there must be no air leaks or you lose.
My previous buses worked pressurised, unless it's the impossible to source valve in the switch other leaks are easy enough to fix, it's just a tyre valve and rubber pipes?
i've been looking at the jk kit but tbh i don't want to have a separate button somewhere on the dash i've managed to get mine working pretty well now, just cleaning the jets and replacing leaky pipes. seems to hold pressure pretty well (ie several months)
I'm still on the original washer set up, can't remember the last time I put any air in it. For years I've been turning the wipers on when it rains, when it isn't raining I just dont use the wipers!
Being the inventive / resourceful / tight git I am and with three scrap yards down the road I popped into one and 'sourced' a small washer bottle with electric pump for a few quid - think it came out of a Fiesta (rear wash / wipe) . 20 odd years down the line and it's still tucked behind the front kick panel - think I've topped it up twice .... Sent from my SM-G960F using Tapatalk
I put an electric microswitch in the column switch on mine (I think I posted the how to here) and it works fine other than I need to fit a one way valve or two nearer the nozzles as fitting the pump near the original tank seems to allow enough water above it (to the jets) to leak back when no pump is applied.
