Stanadyne fuel injection pump

crowfood

New User
I'm new and learning a lot thru reading posts on this site. I have a roosa master fuel injection pump. Wanting to install a new 16320 pilot tube.
Stanadyne service bulletin says use epoxy p/n 40737 or epoxy kit p/n 40739. If I must use this epoxy, where can I get it, or will loctite 620 sleeve
retaining compound suffice? Appreciate any HELP.
 
Get the two part Armstrong epoxy kit. I've seen tubes put in with Loctite that never sealed BETWEEN the pilot tube OD and the housing bore ID, allowing fuel past the tube and ending up in the crankcase.
 
You don't need any specialty epoxy. Any two-part liquid epoxy will work fine.

Like many companies do, Stanadyne "suggests" you buy from them so they can make some extra money.

You also do not need the special Stanadyne drivers.
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The Armstrong kit can be purchased from their website BUT>>
its expensive.. especially w/ the little dabs your going to use..
I think the last kit I bought was 62.00 incl. tax. + shipping..
That being said.. its some good stuff..
I've seen the 2prt 15 min. locktite work, but theres no guarantees..
Stanadyne sells it in a gun & cartridge form now.. & jacked up the price to DOUBLE that of the original set.
What a RIP OFF..
With the cost of the "glue", the kit, the special tools & additional parts that are needed to do a proper o/h,
& THEN theres the "I don't know if its even gonna work" factor..why not just let someone do it for ya??
DT or myself have a combined OVER 60 years experience rebuilding them..
 
The epoxy from Stanadyne melts when heated a little over 350 degrees F, just like any other 2-part liquid epoxy you're going to find at Walmart or Home Depot. I have been doing pumps for over 40 years and have yet to have a pilot tube leak or come loose after I glued it in.
 
I have used locktight many times, and seen a few fail. What product you use isnt as important as the fact you pressure test it when done. Even the best job will sometimes leak. ALWAYS test. This doenst fit the one hour tail gate repair people and is one reason a repair shop that is fair priced isnt really that expensive. I have re/repaired my share of pumps over the years that were home fix jobs that didnt turn out the best. Just the cost of fresh oil and a filter, plus your time to r+r the pump and pull it done again for a leaking pilot tube offsets a lions share of a cost a honest pumpman would charge. A one year full warranty is nice also. Al
 
What does "used Locktight and seen it fail" mean? Loctite is just a brand-name for many different products. Your claim is meaningless unless you tell us exactly what sort of Loctite product failed? Loctite sells thread-locker, sleeve-retainer,
and over 12 different types of two-part epoxy.
 
I am sorry for my misleading post. I am not endorsing any one product over an other for pilot tube sealing. I am making the statement to ALWAYS pressure test a pump after replacing the pilot tube. TEST never GUESS. Al
 

I think that Loctite 620 sleeve retaining compound is great for gluing sleeves in but I would want a two part epoxy for that pilot tube.
 
Thanks for the replies. Still looking at two part epoxies that would do the job. Any recommendations as to brands to use? Yes Armstrong is expensive. Easily removed the old tube and cleaned the housing. Need to pick an epoxy!
 
loc*tite 15 min. 2prt epoxy. is the preferred choice by the "tailgate" rebuilder.. Lol
Like I said, US in the know, use the recommended Armstrong epoxy..
Good luck. TPG
 
I am not privy to who actually determines who is "in the know" and who is not.

I also have no idea what all ?tailgate rebuilders? prefer.

I will say this. Armstrong sells over 30 different types of Epoxy. If someone wants to recommend Armstrong, and is "in the know" - how about citing which specific Armstrong epoxy?

I see Loctite 15 minute two-part epoxy mentioned. Note that is one of the weaker Loctite epoxys. Loctite Clear Multi-purpose is stronger and has higher heat-resistance.

Loctite also makes 6 or 7 different types of "Retaining Compound." #620 has a higher heat rating then any epoxy I know of at 450 degrees F, along with 3800 PSI strength. I suspect that far exceeds anything Stanadyne furnishes as an epoxy. The epoxy from Stanadyne melts at 350 degrees F. That is so you can easily heat a pump housing and get out the old bushing.
 
While I'm sure there are several products that would do the job, I've always used the Armstrong two part A-12 per Stanadyne's recommendation. I prefer to bake them an hour or so at 150 degrees in a toaster oven to speed up curing time, that way pump can be checked out on the bench faster.
 
Stanadyne rec.>> Armstrong epoxy kit A-12.. 2prt epoxy >cured for 24hrs at room temp or heated as per instructed..
SO now, your in the KNOW.
 
(quoted from post at 18:04:33 12/11/17) Stanadyne rec.>> Armstrong epoxy kit A-12.. 2prt epoxy >cured for 24hrs at room temp or heated as per instructed..
SO now, your in the KNOW.

Pump guy, I think you mean "you're" in the KNOW. I haven't seen your posts before but I have been reading JDEM's posts for probably over fifteen years, and I was able to judge that he was "in the know" probably fourteen years ago.
 
"You are" [lol] correct on the word usage, thank you.

I'm just passing along the correct information for the question that was asked, that's all.
Of course there are alternatives to most things in the mechanical world.. but once armed w/ the correct information.. you have choices..{it was not a personal attack}
Have a wonderful Holiday & Merry Christmas.. TPG
 
Just to make things a little more confusing. As far as I can tell, the same Ellsworth company that makes epoxy for the Armstrong brand also makes epoxy for Loctite. There are packaging differences, but it looks like some of the epoxy versions under either brand name are the same.
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