Sprayer pump diaphragms

[neilo]

I have a 6 cyl 'Desmopan' pump on my old Frazier sprayer which has suddenly developed an appetite for oil, which must be getting into the water as there was a slight sheen where I sprayed out clean water on the yard last night. I am assuming that there is a split diaphragm somewhere so was going to renew them.

How big a job is it, and does the pump need to be removed from the sprayer, or can it be done in-situ?

 

[solo]

Severn Agriculture near Birdlip are who i use since kellands changes. They would supply parts and are very helpful. Its not a big job to change diaphragms. Sometimes i do my twin amazone pumps myself or in the past i used to take the pumps with me and did them at kellands. I have to remove the pumps from mine to do them so its just as easy to take them with me to get the spares. Its most of a day job on mine, which is mainly removing and refitting them.

 

[Chae1]

Just don't over tighten them when you put bolts back in!

 

[Brisel]

Pump off job as you'll need to get to the cylinders under the pump. It's just fiddly, so allow half a day.

To bleed the air out, it's best to loosen the top cylinder head to help as the oil pipe is too narrow to do this effectively. It will take a few days to settle the oil level so keep an eye on it afterwards.

 

[neilo]

Half a day? Sounds like a pita

thanks all.

 

[Richard Smyth]

2-3 hours should easily do it. Never heard of that brand of pump but have rebuilt a few others and it’s a simple straight forward job. Pump will need to be off the machine though.

 

[Will Blackburn]

Does everyone change the one way valves at the same time. My dealer always pushes it?

 

[Brisel]

Does everyone change the one way valves at the same time. My dealer always pushes it?

Not usually. Have a look at them while it's apart. I've only refurbed AR and Hardi pumps & the valves in those don't give much trouble unless the springs break. If I were a contractor putting thousands of hours on a machine each year I'd consider it or at least have a few spares handy.

 

[DrWazzock]

I have an Anovi Reverberi or some such pump on the bateman. I replaced the diaphragms about 15 years ago and not the valves and the performance is now pretty poor suction wise though no oil leaks. I suspect valves which I didnt replace. My only word of caution is watch out for plastic coating (if it has it) getting pushed off the pump castings by corrosion. I reckon that will prevent me from refurbing again sadly, as it wont be possible to get a decent seal around the diaphragms which is why I am running it now till it will suck no more.

 

[marcot]

I've taken the same approach with the Missus

 

[Dman2]

Did my AR pump this morning
New diaphragms and changed half the valves ( did other half last time it was apart)
Took about 3 hours

 

[Brisel]

I've taken the same approach with the Missus

Swapping them over is VERY expensive! Better to lease the more efficient version

 

[neilo]

2-3 hours should easily do it. Never heard of that brand of pump but have rebuilt a few others and it’s a simple straight forward job. Pump will need to be off the machine though.

The pump has a ‘desmopan’ sticker on it, which looks like it might be the material the diaphragms are made of (looking at Kramp website)? The actual pump looks identical to an AR250, and it’s on a 1999 Agribuggy Stealth, so should have been a decent spec when new.

 

[Richard Smyth]

The pump has a ‘desmopan’ sticker on it, which looks like it might be the material the diaphragms are made of (looking at Kramp website)? The actual pump looks identical to an AR250, and it’s on a 1999 Agribuggy Stealth, so should have been a decent spec when new.

just looked it up. That should be a straight forward job. Just be careful as I’ve occasionally had the bolt holding the diagphram in place bind up on the piston on an imovilli pump I’ve done

 

[Hesstondriver]

I feel this is a perfect job for @spin cycle

 

[neilo]

I feel this is a perfect job for @spin cycle

I was very close to tagging him in earlier, thinking his workshop experience might be handy for such a delicate operation.?

 

[ridger]

Did my AR pump this morning
New diaphragms and changed half the valves ( did other half last time it was apart)
Took about 3 hours

Where did you get the diaphragms? I tried yesterday and usual place wont post to northern Ireland. Ar 150 pump. Asked @SimpersTradeCounter and they didn't even reply

 

[Nearly]

@ih1455xl

 

[ih1455xl]

Is there a plate on the pump you can find I do have a good second hand 6 cylinder pump here

 

[ih1455xl]

£82 for 6 blue diaphragm kit To fit AR pump