Cast iron pump head


Old 01-06-04, 12:18 PM
jeff moralez
Visiting Guest
Posts: n/a
Cast iron pump head

I have a limited knowledge of welding cast iron and was hoping someone could give a brother some help.
I have a cracked triplex plunger head that is cast iron and has a hairline crack. I know you are supposed to v the crack with a milling bit or grinder but what I am most curious about are the different rods and nickle content to use. some are different in price and nickle.

thanks in advance.
Sponsored Links
Old 01-06-04, 12:48 PM
Ed Imeduc's Avatar
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 18,389
Received 0 Votes on 0 Posts
Lightbulb pump head

Id v the crack, preheat it and go with brazing it. ED
Old 01-06-04, 06:56 PM
GregH's Avatar
Super Moderator
Join Date: Jan 2001
Location: Manitoba
Posts: 10,139
Received 37 Votes on 35 Posts
Been there done that. (Without success.)

jeff moralez:

By triplex plunger head are you working on a high pressure sprayer pump that has frozen?

Very difficult to weld and hold pressure.

If you try you will need to v it, use nickle rod and preheat untill you strike the arc.
Old 01-07-04, 06:58 AM
jeff moralez
Visiting Guest
Posts: n/a
Ya I dont have alot of confidence in a welded head but I gotta try.

Thanks for the info.
Old 01-15-04, 01:00 PM
Ed Imeduc's Avatar
Join Date: Aug 2002
Location: Mountain Williams Missouri
Posts: 18,389
Received 0 Votes on 0 Posts
Lightbulb brazing

Helped braz a stroke head on a 20 ton punch press. Took all day with all the preheat and all but its still in one piece and runs ED
Old 01-25-04, 07:04 AM
Portable Welder
Visiting Guest
Posts: n/a
Both people gave good advise. If you can tear the pump apart so that there are no seals to damage due to heat, I prefer to braze it. if you cannot tear it apart I would use nickle rod, vee- groove the crack is criticle, pre heat is criticle, but not to much pre heat if seals are inside, then weld it or braze it, if it is not taken apart weld only an inch at a time and sharpen the tip on your chipping hammer and lightely peck at the weld this will stress relieve it and act as peening. then weld another inch and repeat.
upon completion I like to post heat it again and peen it some more and let it slowly cool.
Good luck.
Old 01-31-04, 04:58 PM
New Member
Join Date: Jan 2004
Posts: 114
Received 0 Votes on 0 Posts
I recently welded my pump head. It had about a 4 inch hairline crack from freezing. So far so good. I wire brushed area, V'd ,preheated just enough to get oils out[didn' want to warp so I left pump bolted to the motor] and then ran a few stringers.

Old 02-04-04, 05:01 PM
jeff moralez
Visiting Guest
Posts: n/a
Well I ved it preheated but did not peen it. It leakedv right off the bat so I replaced the pump. Good advice from you guys thanks.
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: