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daedong

daedong

New member
I have this old spray vat that I use to inject soluble fertilizers through my irrigation system. While fertigating today the pump blew a bearing on the main shaft. This pump is a Bertolini high-pressure piston pump. It is about thirty years old but only gets used once a month for about an hour.
I have pulled the pump off the vat, took the end covers and one head off but for the life of me I cannot work out how to get the shaft out. I doubt that anyone here would know but would someone know of a forum that might be able to help me?
 
Vin,
Pictures would sure help to figure this one out.
We have quite a few on here who are very mechanically inclined.
 
Obviously the four pistons must be connected to the shaft. There is no way of splitting the main housing to get in. there must be some way of removing the shaft but I am at a total lose.
 
Never worked on one before, but it appears to be a diaphragm pump,which to me means all four diaphragms are connected to one eccentric which runs on an eccentric on shaft. Have you tried tapping on the end of shaft in pic #2 w/ a brass hammer or block of hardwood(Don't want to expand the end of splined shaft). It appears to me the opposite end will come out of the case that way as there appears to be a retainer for bearing in pic #2 and bearing looks like it will come w/ shaft in pic #3. Hopefully the eccentric bore is large enough for bearing in pic #2 to go thru it. All guesstimation on my part. Maybe someone else on here has worked on one.
HPTH,
Mike
 
Why not contact the manufacturer for a parts break down and possibly for a service manual. True, they might not speak the Kings English, but I am certain that they might know enough to communicate with you and accomplish the task....... Click here.....
 
Thanks for that Junk.

I finally found out how it comes apart, the sleeves pulled out over the pistons allowing the conrods and pistons to slide sideways until the base or bottom of the conrods were supported against the housing. From there I was able to knock the shaft out without any damage to the pistons or conrods.

 

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Mike I finally got back to the pump yesterday. The pics show how the pistons go into the housing first then the sleeve goes in over the piston. There is not a lot of room to work getting the big ends back in place. The con-rods are simply held to the crank by one common ring that fits over each end of the big ends.Mike I finally got back to the pump yesterday. The pics show how the pistons go into the housing first then the sleeve goes in over the piston. There is not a lot of room to work getting the big ends back in place. The con-rods are simply held to the crank by one common ring that fits over each end of the big ends.
http://www.forumsforums.com/3_9/attachment.php?attachmentid=8002&stc=1&d=1161033651
 

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attachment.php
http://www.forumsforums.com/3_9/attachment.php?attachmentid=8005&stc=1&d=1161035392
http://www.forumsforums.com/3_9/attachment.php?attachmentid=8000&stc=1&d=1161033651
 
Thanks, Dae. I was mighty curious since it wasn't a diaphragm pump.I learned something new today.I've tried to do that my whole life.
Thanks again,
Mike
 
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