View Poll Results: Would you buy a rough pump casting?
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YES
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NO
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100.00% |
Maybe depending on cost
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Whats a Contra rotating engine?
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06-19-2017, 09:35 AM
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#1
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Veteran Member
City: Saint John
Vessel Name: Ex Squiggles, current Goin Baroque...soon to be???
Vessel Model: 1979 Mainship 34 MKI
Join Date: Aug 2015
Posts: 55
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Perkins 6.354 Contra rotating water pump
I have a 1979 Mainship MK1, Perkins 6.354.
What I know for sure: My engine is not an "X" in SN. Engine rotates CW from rear, CCW from front so it IS a contra rotating.
Just rebuilt my FW pump with a kit for a MF, Sparex S.40048( http://v2.us.sparex.com/ItemDetails/ItemDetails.aspx?ItemNumber=40048&OriginalItemNumb er=&CurrentTab=ManufacturerPartNumbers)
It all works except impellor(fins wrong angle). Note that the old impellor was loose on the new shaft, required .002" interference fit so I had to sleeve and rebore the impellor.My plan in the fall is to remove the pump again, disassemble, and see if a local foundry can cast the housing and impellor.I also plan to try and slice off the impellor fins, flip them and braze them on, to see if its feasible.
Who would like to purchase raw casting of a case and (maybe) impellor if I can get it done? Not looking to get rich but figured there may be a need and there is economy if multiple made in a run.
Please leave a name/contact info so I can determine how many I could ask to have made.
I will post updates as I proceed with this.
Anyone on another group please feel free to repost but want to keep list here.
If you want to tell me this is not possible, waste of time etc then you obviously are not in need so keep it to yourself. I would pay $500 for a good casing and impellor right now so figure there has got to be others in same boat (not basing price on this just sayin)
Main goal is to have a good rebuilt spare pump.
Thanks in advance,
Mike G
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06-19-2017, 09:46 AM
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#2
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Veteran Member
City: Saint John
Vessel Name: Ex Squiggles, current Goin Baroque...soon to be???
Vessel Model: 1979 Mainship 34 MKI
Join Date: Aug 2015
Posts: 55
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06-19-2017, 10:05 AM
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#3
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Guru
City: Kilmarnock VA
Vessel Name: Wandering Star
Vessel Model: PSN40
Join Date: Apr 2016
Posts: 1,396
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MGardner we replaced our 6-354 CR'ing pump with a reman one from TAD. MUCH easier than what you're proposing! If I recall it was like $2-300 with exchange... it was an easy replacement.
Shawn
__________________
-Shawn-
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06-19-2017, 10:13 AM
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#4
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Veteran Member
City: Saint John
Vessel Name: Ex Squiggles, current Goin Baroque...soon to be???
Vessel Model: 1979 Mainship 34 MKI
Join Date: Aug 2015
Posts: 55
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Thanks but TAD Only takes yours for rebuild ie you send to them, they send to jobber, they send back when done. I called them last month. They have no cores left.I am not willing to send my only, rare pump away.
I would like a spare, you got one you would part with? When did you do this?
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03-06-2023, 09:37 AM
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#5
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Newbie
City: Port Charlotte
Join Date: Mar 2023
Posts: 1
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Sorry for "necroposting", but mgardner, did you ever have any luck finding/creating spare contra rotating coolant pumps? I've got twin 6.354s, both contra (I know, go figure).
K
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03-06-2023, 09:46 AM
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#6
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Guru
City: Owings, Md
Vessel Name: Graceland
Vessel Model: Mainship 34 MK1
Join Date: Jan 2016
Posts: 1,381
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I just ordered a conter rotating perkins coolant pump for my engine from this site:
https://www.parts4engines.com/perkin...4-water-pumps/
Option B appears to be the correct pump for us, I'll try and report back my results. I was about $160 with shipping. Mine is not leaking but I wanted to have a spare ready to go.
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03-06-2023, 03:23 PM
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#7
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Senior Member
City: Chesapeake Bay
Vessel Name: Patty Ann
Vessel Model: Mainship 34 MK1 1980
Join Date: Jan 2014
Posts: 410
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Gdavid,Great find! Please report back your opinions.
__________________
David
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03-07-2023, 11:48 PM
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#8
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Guru
City: Gulf coast
Join Date: Aug 2016
Posts: 2,271
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Why do you believe that pump is for the contrarotating version of the engine?
Not saying it isn't. I just don't see that written there and that would be an odd thing not to be bold face and flashing? Or am I looking out of phase and missing it?
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03-14-2023, 09:11 AM
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#9
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Guru
City: Owings, Md
Vessel Name: Graceland
Vessel Model: Mainship 34 MK1
Join Date: Jan 2016
Posts: 1,381
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Quote:
Originally Posted by STB
Why do you believe that pump is for the contrarotating version of the engine?
Not saying it isn't. I just don't see that written there and that would be an odd thing not to be bold face and flashing? Or am I looking out of phase and missing it?
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Actually, I'm pretty sure I got it wrong.
This thread has some pictures of the two castings and there is a suble difference you can see. I'm pretty sure I did order a pump for the standard rotation and the contra-rotation was not an option.
https://www.trawlerforum.com/forums/...mp-7959-2.html
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03-14-2023, 10:17 AM
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#10
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Guru
City: Gulf coast
Join Date: Aug 2016
Posts: 2,271
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Quote:
Originally Posted by Gdavid
Actually, I'm pretty sure I got it wrong.
This thread has some pictures of the two castings and there is a suble difference you can see. I'm pretty sure I did order a pump for the standard rotation and the contra-rotation was not an option.
https://www.trawlerforum.com/forums/...mp-7959-2.html
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The contrarotating option, to knowledge, has not been an option for decades. There's been a lot of talk of sand casting or adapting one over the years...but no one has ever done it.
As far as I know those pumps and the shaft coupling (used on both versions) are the two parts one can no longer get.
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03-14-2023, 10:18 AM
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#11
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Guru
City: Gulf coast
Join Date: Aug 2016
Posts: 2,271
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Also, sorry about that! At least they are rebuildable!
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03-14-2023, 10:42 AM
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#12
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Senior Member
City: Chesapeake Bay
Vessel Name: Patty Ann
Vessel Model: Mainship 34 MK1 1980
Join Date: Jan 2014
Posts: 410
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Quote:
Originally Posted by STB
Also, sorry about that! At least they are rebuildable!
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Any suggestions as who rebuilds these aside from TAD? Curious if we ever need a rebuild.
__________________
David
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03-14-2023, 10:45 AM
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#13
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Guru
City: Owings, Md
Vessel Name: Graceland
Vessel Model: Mainship 34 MK1
Join Date: Jan 2016
Posts: 1,381
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Quote:
Originally Posted by Dwk
Any suggestions as who rebuilds these aside from TAD? Curious if we ever need a rebuild.
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I trust TAD but am nervous about shipping my irreplaceable part off to them, I've had too many delivery adventures in the last couple of years. I honestly may drive it down next fall.
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03-14-2023, 10:21 PM
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#14
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Guru
City: Gulf coast
Join Date: Aug 2016
Posts: 2,271
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In addition to TAD...
S&W Diesel in Wilmington (Los Angeles area, 310-835-3155). They are another legacy Perkins specialist.
And, I suspect, but don't cant promise, Depco (Clearwater, FL-based, 310-835-3155). Depco is a large, national, pump and pump parts distributor. Their Web site is mostly about pumps and parts, but they do have a well-known and very capable rebuild service.
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03-16-2023, 02:22 PM
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#15
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Guru
City: Owings, Md
Vessel Name: Graceland
Vessel Model: Mainship 34 MK1
Join Date: Jan 2016
Posts: 1,381
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The pump arrived from England and it is not for the contra-rotation Perkins. One thing that is interesting, the impeller vanes are straight l, not curved in either direction. The housing clearly is build to direct coolant from the heat exchanger and into the head with the pulley turning clockwise, as opposed to my engine which turns CCW when viewed from the front.
It is a bit hard to see but if you look closely, you can see straight down either side of the vane.
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03-16-2023, 02:32 PM
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#16
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Guru
City: Kilmarnock VA
Vessel Name: Wandering Star
Vessel Model: PSN40
Join Date: Apr 2016
Posts: 1,396
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Is the impeller the same size as the original one? Maybe the straight blade one is good enough to move the flow of coolant in the direction of rotation.
Edit: After swapping the new impeller into the contra- housing...
__________________
-Shawn-
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03-16-2023, 02:50 PM
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#17
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Guru
City: Owings, Md
Vessel Name: Graceland
Vessel Model: Mainship 34 MK1
Join Date: Jan 2016
Posts: 1,381
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Quote:
Originally Posted by boomerang
Is the impeller the same size as the original one? Maybe the straight blade one is good enough to move the flow of coolant in the direction of rotation.
Edit: After swapping the new impeller into the contra- housing...
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I haven't pulled my pump yet, it wasn't leaking, I was just attempting to get a head of the game. I would expect my impeller to look like the used impeller in post #2.
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03-16-2023, 03:01 PM
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#18
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Guru
City: Owings, Md
Vessel Name: Graceland
Vessel Model: Mainship 34 MK1
Join Date: Jan 2016
Posts: 1,381
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Quote:
Originally Posted by boomerang
Is the impeller the same size as the original one? Maybe the straight blade one is good enough to move the flow of coolant in the direction of rotation.
Edit: After swapping the new impeller into the contra- housing...
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I haven't pulled my pump yet, it wasn't leaking, I was just attempting to get a head of the game. I would expect my impeller to look like the used impeller in post #2.
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03-16-2023, 08:43 PM
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#19
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Guru
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 13,333
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Perkins coolant pump
Long while ago but I bought one, think it came from a tractor parts stockist. Perkins may have been used in English tractor brand Ferguson, though I thought they were 4cyl. I didn`t fit it, the marina mechanic did. As I recall it, the pump assists circulation which happens anyway.
__________________
BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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03-16-2023, 09:16 PM
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#20
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Guru
City: Gulf coast
Join Date: Aug 2016
Posts: 2,271
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Quote:
Originally Posted by BruceK
Long while ago but I bought one, think it came from a tractor parts stockist. Perkins may have been used in English tractor brand Ferguson, though I thought they were 4cyl. I didn`t fit it, the marina mechanic did. As I recall it, the pump assists circulation which happens anyway.
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I would be extremely surprised if a tractor used a contrarotating Perkins engine. To my understanding, they were always lower volume step siblings for twin screw marine use.i can think of a need for them in a single screw boat, tractor, trick, or other vehicle or vessel.
I could be missing something. Not claiming I know anything, other than I'd be surprised.
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