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  #16  
Old 09-06-2007, 09:27 PM
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John Slade John Slade is offline
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Default Re: Sticky-Stuff pump?

Yes, there's a rubber gasket in there. The manufacturer supplies a rebuild kit that includes all the parts you might need. 6 months seems very short time. Mine lasted 4 years before needing the kit. You might try stripping it down, cleaning and rebuilding. Only takes an hour or so.
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  #17  
Old 09-06-2007, 10:01 PM
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TMann TMann is offline
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Default Re: Sticky-Stuff pump?

Here's the part link.

Myself, I would call Michael Engineering and tell them what is going on. I would bet they would take care of that for you.

Good people.
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  #18  
Old 09-06-2007, 10:07 PM
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David Clifford David Clifford is offline
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Default Re: Sticky-Stuff pump?

The seal in my pump was a white teflon "O" ring. It was pretty stiff trying to compress it to fit in the hole and into the groove..I also got about 4 years out of it before it needed replacing. Its been another 4 years since but is only used VERY rarely now. I even thought about breaking it down for cleaning and storage but will wait 'til all the loose ends are tied up and the plane is in its hanger,,,,,,,,which should be soon now!
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  #19  
Old 09-09-2007, 12:08 AM
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Default Re: Sticky-Stuff pump?

My pump is over 20 years old and still works great. When I finished my last plane in 1988 I even left the epoxy and hardner in it. When I started on my cozy IV I pulled it off of the shelf dumped the epoxy and hardner out and cleaned it up with MEK and started using it again. Works great. STeve
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  #20  
Old 09-10-2007, 07:11 PM
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Default Re: Sticky-Stuff pump?

I took my pump apart and the O rings looked fine to the naked eye. I will order new ones and see if that fixes the problem. I wonder if I overheated the teflon rings as my hot box hit 130 degrees a few times in the summer.
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  #21  
Old 09-11-2007, 07:16 AM
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Default Re: Sticky-Stuff pump?

Eric, it seems the o-ring is not the problem. Try tightening everything back up real good before wasting time waiting for an o-ring to get in the mail. Try it with water first. The water is thin enough to tell you where the problem is or if it's fixed. Mine is pretty old and all I did was overhaul it like John did. No new parts yet.
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  #22  
Old 09-12-2007, 03:25 AM
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Default Re: Sticky-Stuff pump?

cleaned up the pump put some water in it and gave her a few good pumps.... Water every where... leaking from the piston.

ordered a couple Orings hope this does the trick. still don't know why my rings failed so soon could it be they got to hot?
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  #23  
Old 09-12-2007, 07:39 AM
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Default Re: Sticky-Stuff pump?

Quote:
could it be they got to hot?
No, I've had mine up to 120 degrees. After 3 years plus approx. 7 years previous owner all mine needed is cleaning. My containers are a bit sagging and the lids are cracked but still going. Sounds like a defect or assembly problem of some kind. Did you clean it with any kind of solvents that may have affected the seals? Although I've cleaned mine with Acetone with no problems.
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  #24  
Old 09-14-2007, 06:40 PM
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Clutch Cargo Clutch Cargo is offline
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Default Re: Sticky-Stuff pump?

It's probably a nut loose on the handle.
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  #25  
Old 09-15-2007, 07:51 PM
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Default Re: Sticky-Stuff pump?

Quote:
Originally Posted by Clutch Cargo View Post
It's probably a nut loose on the handle.
No way to tighten loose nut.
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  #26  
Old 09-16-2007, 03:21 AM
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Default Re: Sticky-Stuff pump?

Quote:
Originally Posted by Erick View Post
No way to tighten loose nut.
Maybe it's a bent jacket, have you tried a straight one?
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  #27  
Old 09-23-2007, 01:22 AM
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Default Re: Sticky-Stuff pump?

I installed new o-rings and all is well, no big sticky mess at least under the pump.
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  #28  
Old 09-23-2007, 11:13 PM
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Default Re: Sticky-Stuff pump?

I'm still on the fence regarding these Sticky Stuff pumps. The local composites supplier has advised me against using one, and a lot of people on these forums will say that a scale is better. On the other hand, many builders have used them successfully and continue to do so. Even Burt Rutan and Mike Melvill are using one in their instructional video.

My main concern is accuracy. Have any of you used a scale to verify the pump, and if so, how close is it to the theoretical ratio that it's supposed to dispense?

Joe Polenek
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  #29  
Old 09-23-2007, 11:25 PM
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TMann TMann is offline
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Default Re: Sticky-Stuff pump?

Joe, I use the SS pump. As a matter of fact I have 2 of them. 1 for fast and the other for slow.

I check the numbers from time to time and they stay real steady.

The other side of this is getting caught up in over-analyzing too much. Set a pace and stay with it. I started in April and I've been closing a chapter a month. Pump or weight ...... just start mixing.
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  #30  
Old 09-24-2007, 05:22 AM
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Default Re: Sticky-Stuff pump?

my pump stays right on ratio after 6 months of use.... verified with a scale
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