Manual gas pump sticking and oil in new Tygon tubing.
10-21-2008, 05:40 PM
#1
Thread Starter
Manual gas pump sticking and oil in new Tygon tubing.
This is a two part query with the first being, my Hangar 9 Ultra manual gas pump works well but if unused for a few weeks is very difficult to crank initially when put back in use. Why is this and how can I stop it from happening as it puts quite a strain on the cranking handle which I am afraid will break one of thes days. I use a similar pump for glow and it works perfectly.
Secondly, some time ago I bought some Tygon tubing and put it away in a plastic Zip lock bag for future use, and now on opening the packet I noticed the tubing was oily on the outside and had droplets of an oil looking substance inside. How could this be as it was all clean and dry when put away. It's a mystery to me.
Karol
Secondly, some time ago I bought some Tygon tubing and put it away in a plastic Zip lock bag for future use, and now on opening the packet I noticed the tubing was oily on the outside and had droplets of an oil looking substance inside. How could this be as it was all clean and dry when put away. It's a mystery to me.
Karol
10-21-2008, 05:49 PM
#2
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RE: Manual gas pump sticking and oil in new Tygon tubing.
ORIGINAL: karolh
This is a two part query with the first being, my Hangar 9 Ultra manual gas pump works well but if unused for a few weeks is very difficult to crank initially when put back in use. Why is this and how can I stop it from happening as it puts quite a strain on the cranking handle which I am afraid will break one of thes days. I use a similar pump for glow and it works perfectly.
Secondly, some time ago I bought some Tygon tubing and put it away in a plastic Zip lock bag for future use, and now on opening the packet I noticed the tubing was oily on the outside and had droplets of an oil looking substance inside. How could this be as it was all clean and dry when put away. It's a mystery to me.
Karol
This is a two part query with the first being, my Hangar 9 Ultra manual gas pump works well but if unused for a few weeks is very difficult to crank initially when put back in use. Why is this and how can I stop it from happening as it puts quite a strain on the cranking handle which I am afraid will break one of thes days. I use a similar pump for glow and it works perfectly.
Secondly, some time ago I bought some Tygon tubing and put it away in a plastic Zip lock bag for future use, and now on opening the packet I noticed the tubing was oily on the outside and had droplets of an oil looking substance inside. How could this be as it was all clean and dry when put away. It's a mystery to me.
Karol
Have you ever noticed how vinyl binders and other soft vinyl products get hard in time. Well one reason is because the plasticizers leave the vinyl leaving it stiff. Same happens with Tygon in use. Some gasolines will tend to make it stiff, some more flexible.
10-21-2008, 08:27 PM
#5
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RE: Manual gas pump sticking and oil in new Tygon tubing.
My solution regarding the pump sticking so far is every now and then when I'm close by I give the handle a turn or two.
Karol
Karol
10-21-2008, 09:48 PM
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RE: Manual gas pump sticking and oil in new Tygon tubing.
Hmmmm. Maybe your jamaican gas has some special additives. Maybe your pennzoil doesn't lube and protect all that well. Gas will swell o-rings, maybe the case is warping from the swelling. Do you leave gas in the pump? if not I might guess it's drying out during periods of non use. Try leaving some gas in the pump.
I havn't had that issue ever with a Dubro thats 3 years old, but it did leak a bit this weekend. I hadn't used it for about 2 months ( been doing the electric thing) I almost never drain the tank after flying. Course I use a super secret best 2 cycle oil.
I havn't had that issue ever with a Dubro thats 3 years old, but it did leak a bit this weekend. I hadn't used it for about 2 months ( been doing the electric thing) I almost never drain the tank after flying. Course I use a super secret best 2 cycle oil.
10-22-2008, 06:48 AM
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RE: Manual gas pump sticking and oil in new Tygon tubing.
Your Hanger 9 pump is sticking because the small screw in the side of the pump is too tight. You will have to peel back the Hanger 9 label to find the screw, just back off the screw enough to allow you to turn the pump handle, if you back it off too far you will have problems priming the pump. I believe that this is the same pump that Dubro sells.
10-22-2008, 12:29 PM
#8
Thread Starter
RE: Manual gas pump sticking and oil in new Tygon tubing.
ORIGINAL: huey-pilot
Your Hanger 9 pump is sticking because the small screw in the side of the pump is too tight. You will have to peel back the Hanger 9 label to find the screw, just back off the screw enough to allow you to turn the pump handle, if you back it off too far you will have problems priming the pump. I believe that this is the same pump that Dubro sells.
Your Hanger 9 pump is sticking because the small screw in the side of the pump is too tight. You will have to peel back the Hanger 9 label to find the screw, just back off the screw enough to allow you to turn the pump handle, if you back it off too far you will have problems priming the pump. I believe that this is the same pump that Dubro sells.
Altavillan,
You could have a point there about the pump drying out, as I do drain my tanks after use so most times the pump is empty. Will try leaving it in a primed state and see if that helps.
Karol
10-23-2008, 07:14 AM
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RE: Manual gas pump sticking and oil in new Tygon tubing.
The screw on the side of the pump adjusts the clearance between the side plate of the pump and the gears inside. After use some of the pumps will get tight and increasing the clearance will allow the gears to turn freely. You will need a small allen wrench to turn this screw.
10-23-2008, 10:36 AM
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RE: Manual gas pump sticking and oil in new Tygon tubing.
Hi!
Best pump I have used is this. It pumps both gas and methanol fuel. And...it has a modified gear-box...pumps more fuel in less time than previous models.
Best pump I have used is this. It pumps both gas and methanol fuel. And...it has a modified gear-box...pumps more fuel in less time than previous models.
10-23-2008, 04:54 PM
#12
Thread Starter
RE: Manual gas pump sticking and oil in new Tygon tubing.
ORIGINAL: huey-pilot
The screw on the side of the pump adjusts the clearance between the side plate of the pump and the gears inside. After use some of the pumps will get tight and increasing the clearance will allow the gears to turn freely. You will need a small allen wrench to turn this screw.
The screw on the side of the pump adjusts the clearance between the side plate of the pump and the gears inside. After use some of the pumps will get tight and increasing the clearance will allow the gears to turn freely. You will need a small allen wrench to turn this screw.
Karol
10-23-2008, 05:51 PM
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RE: Manual gas pump sticking and oil in new Tygon tubing.
Counterclockwise will increase the clearance. With too much clearance, however, the pump will pump less fuel per crank.
10-23-2008, 10:12 PM
#14
RE: Manual gas pump sticking and oil in new Tygon tubing.
ORIGINAL: gkamysz
The sticking pump is very common. There isn't much you can do about it.
The sticking pump is very common. There isn't much you can do about it.
