mick m

Acetone, D-Limonene

If you can remove all man made debris by whatever means, sweeping, vacume, then whats left must be considered ''natural'' staining from airborn dirt & dust. Or are the powers that be that anal about it?

Either adjust the unloader, strip it down & check it over or replace!

I think you answered your own question there Tom. Alkalines will attack any metal over time + you have to think of the gun as well....cast aluminium. Soft as butter. You might get away with it for a while, but then one day.......pop. Why not use a pump up sprayer instead?

Heh heh heh, ''Tis but a scratch''. That would be the worst case senario me thinks. The stuff I use is made by Henkle, which is 8% + some phosphoric as well. Just ned to get a poisons license to buy & store. Contact your local health dept for the requirements. I use it for bore stain removal. Absolutely brilliant.

Have you ever tried hydrofluoric acid?

Well..........maybe its time to upgrade to a larger battery. What about taking it to an auto electrician & have them measure the 'draw' on your current one. Could it be the actual charging system itself playing up? Could just be that the battery is starting to break down. Let us know how you get on with it.

Do you have the trigger 'open'? as in squeezed? If not, your putting way too much load on the starting system. The reason it will crank when you jump start it, is because it's getting it's juice from a larger battery. The litte battery is fighting the compression of water in the pump. Sqeeze the trigger. It will make a difference.

Wide brim hat over here in West Australia. Absolutly essential. Not enough hair to cover the ears & not much left up top to protect the old melon.

Don't you find it restricts the water flow tho?

Try a litle blob of stripper gel directly on to the glue, let it do its thing then wash off with hot water.

Had the same problem a few years ago. next to the ''thick'' governor spring there is a really fine wire spring called a steady spring, check that out as mine had snapped & caused the same problem.

You could try some arse about chinese phrase's as well. A la Sheldon Cooper learning manderin to go mad at the chinese takeaway.

When you realize it's one of ''those'' calls, order a pizza if its a male. If its a female ask about her underwear. They'll hang up on you, trust me!:tears_of_joy:

Why would you not? It's free advertising. How do you know thats how this new potential client found out about what you do, & decided to contact you? The more info the client has about your business, the less he has about the opposition! Work smart, not hard & good luck.

Sorry, no pics. I know what I mean, but I'm struggling to explain it, so bear with me. The extension, at the bottom of it should be flared out. [imagine a range hood] that sits above the chimmny by about 5 inchs. As the exhaust from the boiler comes out, it creates its own draft, & in turn creates a stronger updraft, which will solve any problems regarding back pressure.

I saw something on the TV a while back showing the answer to this sort of question. The extension of the exhaust needs to sit above the chimmny, not joined to it. As the heat rises, it causes an updraft which increases the air flow upwards & sucks out the exhaust. The same principle is used to inflate those emergency escape slides on large aircraft.

Put in 5 hrs washing down painted concrete walls at a shopping centre. Optimum time to do it when there's no one about.

How about trying gaur gum? I've used it in the past to thicken HF so it clings longer on brick work. Acts as a lubricant as well, which is a bonus when applying it with a broom.

Hi Griff. I don't think its the unloader. If the bypass is plumbed into the pump, it's still going to get the same amount of water. If that makes any sense. If the pumps not pushing out water it has to be the pump at fault as the unloader is there to divert the flow either back to the pump or to a tank. And as he's working out of his car, theres no tank in the equation. My moneys still on the seals being shot. Or, cracked pistons. I await with interest on the outcome.

I'd be more inclined to go with a belt drive unit.Less stress on both engine & pump & a bit quieter as well. maybe hire a unit to see how you feel about the different set ups that are out there. I know its dead money, renting, but it will give you a better understanding of what your needs are in relation to what you do or intend to do further down the track. As for repairing it, theres no reason you cant do it yourself. Clean down the machine throughly, lay out the various parts in order. Take your time. Pay attention to how things come apart & how they go back together. Check everything, then check it again! There's some stuff on you tube showing how its done. Once you've done it, you'll wonder what you were stressing about. As i'm sure you are. But you can do this. Have faith in yourself & good luck.

Sorry to be the bearer of bad news........ It sounds like the pump seals have gone. It's pumping air instead of water. Not good for the pump at all. It ''shocks'' the piston. Kinda like when you miss that last step on the stairs & you jar your leg. the fluctuation your getting pressure wise, is because of this. One second there's water to be pumped, next there's not. hence the drop/rise in pressure. 2nd, never over fill the oil. In any engine /pump. It needs to be pushed/circulated about the unit. If theres too much, it gets whipped to a foam & you end up with bubbles of oil instead of a constant stream of fluid. The breather hole is there to stop the pump from pressurizing its self. If it cant breath it will fracture the housing. Like you when you have a head cold & it feels like your is going to burst. Then you blow your nose......ah the relief. Same thing. So, it's off with the pump head, new seals & hopefully you have'nt cracked any pistons. Good luck with it.

Quite a few that need to be lifted, I guess I should have said......

Compacter. And no, you don't need to use one. Unless, you need to lift any out to re-lay them due to vehicle wheel ruts causing them to sink over time, & there's quite a few.

Yep. A loss of 400 psi vs the increased water flow will soon be forgotten in time.