Can you find the problem in this picture?

[Policeboss]

Anything wrong with this picture? Look close.. You guessed it!! my vacuum pump went out. Im looking for recommendations. The existing pump is an Airborne 215cc stamped " No Overhaul".

I'm considering an AAA, Tempest or Rapco. All are about the same price.


Thanks Karry

 

[Piloto]

I had good luck with the Rapco pumps, they will last 1000 hours. On the pump failures that I have seen what breaks is the rubber coupler and not the actual pump inside. The rubber on the coupler degrades more with time than with usage. I have opened three of these failed Rapco pumps and all the vanes are in perfect condition. Next time I am thinking of coating the rubber coupler with some protective coat to minimize deterioration. Any suggestions?

José

 

[JHW]

ditch it and put in a wet pump

 

[Policeboss]

Thanks! My rubber coupler was gone. Opened it up and found it it was locked up with three broken vanes.

Engine is a 0-200 in a 1973 Cessna 150L VFR

 

[wabower]

+1. Vac pump problems disappeared.

ditch it and put in a wet pump

 

[JHW]

+1. Vac pump problems disappeared.

well, almost disappeared. One side of the travel air had a wet pump start to go, it was only 40 years and 4000 hours old. Must have been made on a friday.

 

[proppastie]

Lots of oil on the belly with a wet pump. but they certainly are more reliable. It might depend on how much you fly in the soup. Dry pumps are less expensive, I got a used one on E-bay about 5 years ago.

 

[N801BH]

Lots of oil on the belly with a wet pump. but they certainly are more reliable. It might depend on how much you fly in the soup. Dry pumps are less expensive, I got a used one on E-bay about 5 years ago.

I am not sure the word " aircraft vacuum pump" and "Ebay" should be used in the same sentence..

 

[poadeleted21]

I am not sure the word " aircraft vacuum pump" and "Ebay" should be used in the same sentence..

Why not? I had an entire panel I bought on eBay... Some sellers even drop shipped the parts to the overhaul shop so I didn't have to double down on shipping.

 

[JHW]

Lots of oil on the belly with a wet pump. but they certainly are more reliable. It might depend on how much you fly in the soup. Dry pumps are less expensive, I got a used one on E-bay about 5 years ago.

if the wet pump is pumping that much oil overboard it's due for an overaul. With an air sep you should have zero oil on the belly.

 

[Hiperbiper]

Thanks! My rubber coupler was gone. Opened it up and found it it was locked up with three broken vanes.

Engine is a 0-200 in a 1973 Cessna 150L VFR

You are unfortunatly going to find the cost of ANY punp (wet or dry) to be small pototaos compared to the cost of your coupler...

Chris

 

[Dan Thomas]

I had good luck with the Rapco pumps, they will last 1000 hours. On the pump failures that I have seen what breaks is the rubber coupler and not the actual pump inside. The rubber on the coupler degrades more with time than with usage. I have opened three of these failed Rapco pumps and all the vanes are in perfect condition. Next time I am thinking of coating the rubber coupler with some protective coat to minimize deterioration. Any suggestions?

José

That rubber coupler is plastic, and it has a six-year life. I bet all those pumps were older than that. There's something in the fine print about the coupler life.

Cleaning solvents and other contaminants can also shorten the coupler life.

Dan

 

[Dan Thomas]

You are unfortunatly going to find the cost of ANY punp (wet or dry) to be small pototaos compared to the cost of your coupler...

Chris

Each pump comes with a new coupler. Perhaps you mean the pump drive adapter in the engine?


Dan

 

[Hiperbiper]

Each pump comes with a new coupler. Perhaps you mean the pump drive adapter in the engine?


Dan

No Dan;

I had a brain glitch between reading the post and typing my reply.
I substituted Alternator where the OP said Vaccum Pump...

Getting old(er) is hell...

Chris (Aged Flatuent Emeritus)