Vacuum pump

[tazin river]

Hello there

I will need a new dry vacuum pump for our 65 Cessna 180H (engine O-470R) at the next annual in May. I can't seem to find the part number in the logbooks for it and it is just too cold out to dig around in the engine compartment to find it...

Would someone know exactly what I need to order?

Happy New Year to all

[GyvAir]

I see the Rapco application guide, which you've likely already perused, doesn't list a pump for your serial range.
I don't know the reason.. was just trying to be a google search hero.
http://www.rapcoinc.com/pdf/PNEUMATICS% ... alogue.pdf

[Woody42]

What is the S/N of your aircraft. That rapco application chart seems to point to a 212 CW for your situation. If your S/N fits in the chart.

[tazin river]

Here is seems to suggest that the 216cw model is the one. Am I reading this right?

http://aeromech-inc.com/CAPS/VacuumPump ... PN=&ROW=94

[GyvAir]

If you look at the Rapco chart, they are listing the RAP216CW as the p/n for new and the 212CW as the p/n for overhauled.

Looking at the Aircraft Spruce list, you can buy a new RAP216CW or overhauled 216CW (they drop the RAP), but a 212CW is only listed as overhauled.

[tazin river]

Sooooooooooo ....I want an overhauled one so I need to get the 212cw?

[GyvAir]

Well, I don't have enough proper information in front of me to confirm that for you. I don't know what the cause for the absence of a part number on the Rapco chart for the H model would mean. Also, I can't find a direct dry pump replacement for the Cessna number given in the 180 IPC.
I would suggest calling somewhere like Kadex. They should have access to better information and would be able to confirm for you what you need before you order.

[lost in the north]

Just wait for the annual, get the part number off the old pump. You'll have lots of time to get it and install befor the annual is done.

[GyvAir]

This Rapco catalog states that 180A - 180K all use RA216CW (new) or 212CW (o/h)

http://www.trimcraftaviation.com/Trimcr ... 20Tabs.pdf

[iflyforpie]

It looks to me like the serial number range on the Rapco chart correlates to the 180H. Nonetheless, all O-470Rs seem to indicate the same type of pump. Biggest thing is spline/mounting pad and direction of rotation... since they are all just powering instruments.

Forget the Cessna IPC... they probably still have the original wet pumps in there.. which you can get aftermarket (different P/N) if you wish... a bit more expensive but way longer lasting.

The 216CW is the newer version of the 212CW with the Smart Stick inspection hole. This lets you inspect the pump to get out of the mandatory 500 hour replacement by Cessna if under commercial ops. But its a good idea to have regardless... since you can run it right to the limit without worrying about it catastrophically failing. We've been getting about 900 hours on average out of ours. None are available in overhauled condition, and all are sold outright (no core).

[tazin river]

Thank you very much flyforpie

I will order the 216CW then...

Cheers

[GyvAir]

None are available in overhauled condition, and all are sold outright (no core).

What are the ones in the Aircraft Spruce catalogue? They list an overhauled 216CW for about 25% less than a new one.
I remember something around 20 years ago, about one company making dry air pumps and declaring them non-overhaulable, but another company buying up cores and coming up with an approval to overhaul them anyway. I don't remember for sure who the players were. The success of the overhauled ones was rather hit and miss at first, but improved over time.

As far as the original question goes, it would be interesting to know why Rapco listed all the versions of the 180 together in their 2008? catalogue and then split them up in the 2010 catalogue. For the differences in filters and relief valves, I would guess. Not having a pump listed for the 180H serial number range may be as simple as a copy and paste error. A quick email to Rapco might just clear it up for everyone in the future.

[iflyforpie]

Do those come with certs? Could be for the homebuilt crowd. I would've preferred OH too... but everyone I talked to, API, Aviall, Aerspace, Kadex, Leavans (RIP) sold new outright only.

Mind you it's been a while since I ordered one.

[GyvAir]

Their description says that they come with an 8130, so they sound certified. They have a shorter warranty, roughly proportional to the price difference.
I haven't bought one in about 10 years either, but we would always buy the new ones as well, on the theory that the anticipated increased number of down times to change pumps on high utilization aircraft wasn't made up for by the lower unit cost.