I am looking in the wrong place
Subject is original air filter part number and illustration for 1954 Cessna 170B w Cont 0300 engine.
Looking in IPC dated Sept 1, 1956. Nothing
I want to see original factory illustration and part numbers for air filter and the fastener that hold air filter to air box.
Aircraft currently has the Brackett air filter installed.
What is the right place to research part number?
Locate original Part Number, Illustration
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
- MoonlightVFR
- Posts: 624
- Joined: Sun Jan 02, 2005 5:55 pm
Locate original Part Number, Illustration
gradyb, '54 B N2890C
- n2582d
- Posts: 3013
- Joined: Mon Apr 29, 2002 4:58 am
Re: Locate original Part Number, Illustration
From the TCM IPC:
You do not have the required permissions to view the files attached to this post.
Gary
- n2582d
- Posts: 3013
- Joined: Mon Apr 29, 2002 4:58 am
Re: Locate original Part Number, Illustration
What a stud! Aircraft Spruce wants over $300 for four of those camlock studs and cross pins. 

Gary
- sfarringer
- Posts: 323
- Joined: Wed Jan 12, 2005 10:49 pm
- n2582d
- Posts: 3013
- Joined: Mon Apr 29, 2002 4:58 am
Re: Locate original Part Number, Illustration
I've always used Brackett filters. Donaldson makes a good sales pitch here though.
Gary
- DaveF
- Posts: 1564
- Joined: Sat Nov 03, 2007 1:44 am
Re: Locate original Part Number, Illustration
For the dirt argument, maybe, if you live in a dusty environment, and depending on what they mean by "life of the filter". Not much of an argument based on pressure drop. An O-300 turning 2500 rpm draws about 200 cfm, and according to the plot the Donaldson filter has about 1" H2O less pressure drop than the Brackett. One inch of water column is 0.2%, or 0.08" Hg. Not too compelling.n2582d wrote:I've always used Brackett filters. Donaldson makes a good sales pitch here though.
- GAHorn
- Posts: 21302
- Joined: Fri Apr 12, 2002 8:45 pm
Re: Locate original Part Number, Illustration
The problem most folks face when using Brackett filters is.... they fail to squeeze out the excess wettant before installation.
Place the foam filter between two stacks of paper towels, and (this is the tricky part), ... grab the wife's pastry-roller / rolling pin and squeeze out all that sticky wettant before installation. (I guess a 3" pipe would also work, or maybe a rattlecan paint can, etc.)
Do not simply remove the filter from the plastic bag and install it! Get rid of all that excess wettant.
Place the foam filter between two stacks of paper towels, and (this is the tricky part), ... grab the wife's pastry-roller / rolling pin and squeeze out all that sticky wettant before installation. (I guess a 3" pipe would also work, or maybe a rattlecan paint can, etc.)
Do not simply remove the filter from the plastic bag and install it! Get rid of all that excess wettant.
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.

- DaveF
- Posts: 1564
- Joined: Sat Nov 03, 2007 1:44 am
Re: Locate original Part Number, Illustration
"Wettant", is that what it's called? I thought it was called "goo".
- lowNslow
- Posts: 1535
- Joined: Mon Apr 22, 2002 4:20 pm
Re: Locate original Part Number, Illustration
We switched to the Donaldson filter for our glider club towplane and it is working much better. The problem with the Bracketts on a dirt strip is they clog up very fast as they have far less surface area then a pleated filter. I still use a Brackett on my 170 as other then the dirt glider field I am on paved runways.
Karl
'53 170B N3158B SN:25400
ASW-20BL
'53 170B N3158B SN:25400
ASW-20BL
Cessna® is a registered trademark of Textron Aviation, Inc. The International Cessna® 170 Association is an independent owners/operators association dedicated to C170 aircraft and early O-300-powered C172s. We are not affiliated with Cessna® or Textron Aviation, Inc. in any way.