You're sure right about the work (time) involved. Good thing I didn't charge myself an hourly rate! I probably wouldn't have done it if I had to pay someone to do it.blueldr wrote:Rebushing a set of original rudder pedals in a helluva lot more work and expense than installing a set of the later model plastic pedals that never wear out.
IMHO,Unless you're a stickler for originality. the plastig pedals look better too.
44C Annual issues - need advice
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
- sfarringer
- Posts: 310
- Joined: Wed Jan 12, 2005 10:49 pm
Re: 44C Annual issues - need advice
Ragwing S/N 18073
Re: 44C Annual issues - need advice
Richard Pulley,
Are you sure that the rudder pedals are made of a weldable aluminum alloy? Some alloys, if welded will crack right along the edge of a weld.
Are you sure that the rudder pedals are made of a weldable aluminum alloy? Some alloys, if welded will crack right along the edge of a weld.
BL
Re: 44C Annual issues - need advice
I assumed the weld I photographed above cracked because it the aluminum was heat-treated rather than the type of alloy. If I annealed the pedal before welding would that take care of the cracking issue or is the type of aluminum alloy simply unweldable?
Gary
Re: 44C Annual issues - need advice
I would suspect that the rudder pedals are made of 2024 alloy or 24ST and I do not believe that it is classed as a weldable alloy.
BL
Re: 44C Annual issues - need advice
I just traded pedals left and right. The former right side pedals still had round holes and the left ones were a bit sloppy but not at all cracked. Feels better from where I sit. Good for another 50 years I think.
The plastic rudder bar bushings are symmetric top to bottom and do indeed need longer bolts.
The plastic rudder bar bushings are symmetric top to bottom and do indeed need longer bolts.
Re: 44C Annual issues - need advice
Those later model rudder pedals (square tops) look good on square tail 172"s. I changed mine out many years ago. I like them since the area your shoes rub on don't show wear.
OLE POKEY
170C
Director:
2012-2018
170C
Director:
2012-2018
Re: 44C Annual issues - need advice
Arash.....
Two items immediately come to mind. First, please be careful when reassembling your master cylinders...those little piston return springs that encircle the plunger shaft? Make absolutely certain they are installed correctly. If not (upside down), your brakes will function properly at first, but won't be able to refill themselves when the fluid in the line needs replenishment. You may already know this. Second, and you've probably already figured this out, when you install the new-style plastic rudder pedal bearings, the rudder pedal bay dust covers will no longer fit properly because of the height difference. I hate them, but went back to the stock aluminum bearings for this exact reason. Just got to keep 'em lubed. Was planning on flying down to KHAF this week anyway....maybe I'll stop by your hangar, see what you've got going on.
Two items immediately come to mind. First, please be careful when reassembling your master cylinders...those little piston return springs that encircle the plunger shaft? Make absolutely certain they are installed correctly. If not (upside down), your brakes will function properly at first, but won't be able to refill themselves when the fluid in the line needs replenishment. You may already know this. Second, and you've probably already figured this out, when you install the new-style plastic rudder pedal bearings, the rudder pedal bay dust covers will no longer fit properly because of the height difference. I hate them, but went back to the stock aluminum bearings for this exact reason. Just got to keep 'em lubed. Was planning on flying down to KHAF this week anyway....maybe I'll stop by your hangar, see what you've got going on.
Greg Anderson
'55 170B N4316B
'55 170B N4316B
- sfarringer
- Posts: 310
- Joined: Wed Jan 12, 2005 10:49 pm
Re: 44C Annual issues - need advice
Not quite sure I understand the question yet. Steel bushing???Aryana wrote:
.......Now this is just the ticket. In addition to my IA, I have a really good sheet metal guy who can help me do this.
Are the steel bushings only held captive from moving outboard in the pedal by the riveted plate, but are free to move inboard? The steel tube the pedal mounts to would prevent the bushings from moving inboard, but I wanted to make sure I understand your repair before I ask my IA to help.
It been a few years ago, but here is my recollection. I bored out the existing oblong holes to a larger diameter. Not enough to remove all traces of oversize, but enough to locate the new bushings. Then I turned the new bushings on a lathe. The bushings were 2024 aluminum, which is what I assumed the pedals were made from. The bushings are flanged, with the small diameter sized to be a close fit in the new bores of the pedals, and the outer flange sized to rivet to the pedals with correct edge distance. This gives twice the bearing area on the shafts compared to the original pedals, with the same material. I suppose that I also had to fabricate longer shafts, since the pedals are now slightly wider. Now, I don't believe that using aluminum bearing surface is really the best choice for this application, but I was trying to maintain the original design features. Another case where Cessna surely didn't imagine that these airframes would be in service anywhere near this long.
Hope this makes sense now!
Ragwing S/N 18073
Re: 44C Annual issues - need advice
Fig. 59-13 in the 170B IPC shows p/n 0541148. $7.50 from Premier Aviation.Aryana wrote:But speaking of those piston return springs, does anyone know what the part number is and/or where to buy em?
Gary
Re: 44C Annual issues - need advice
Steve, that's nice work. I suppose you could have used bronze for the bushings, or even steel. I'd rather wear out the shaft than the bushing. The shaft is just a hollow 5/16" OD steel rod. If you could lock the shaft to the pedal you'd design out this entire problem. Then the bearing would be the shaft inside the pedal lever T.
Arash, you probably made the right decision about the carburetor. Not a bad idea to rebuild these things every few decades. I said "probably" because you never know how the new carb will work compared to the old one, with a different venturi and different main jet and whatever else changed in all those part number supersedures.
I've done the flap roller job. I used the McFarlane upgrade roller kit. It took a while, not just to install the rollers, but also to clean and repaint the flap tracks and to re-set the flap cable tensions. You might want to consider having some large nylon washers on hand to make your own "wear washers" that run on the sides of the flap tracks.
This is a great thread. My pedals aren't badly worn, but better to fix them before they need it.Arash, you probably made the right decision about the carburetor. Not a bad idea to rebuild these things every few decades. I said "probably" because you never know how the new carb will work compared to the old one, with a different venturi and different main jet and whatever else changed in all those part number supersedures.
I've done the flap roller job. I used the McFarlane upgrade roller kit. It took a while, not just to install the rollers, but also to clean and repaint the flap tracks and to re-set the flap cable tensions. You might want to consider having some large nylon washers on hand to make your own "wear washers" that run on the sides of the flap tracks.
Re: 44C Annual issues - need advice
Arash
The new carb looks really good. I see they have new castings. What is on the "warning label" ?
Dan
The new carb looks really good. I see they have new castings. What is on the "warning label" ?
Dan
Re: 44C Annual issues - need advice
I can only image flying 500 hours a year!
The warning label wasn't as strong as I thought it might be as it was probably written by a lawyer.
The warning label wasn't as strong as I thought it might be as it was probably written by a lawyer.
Re: 44C Annual issues - need advice
a job well worth several hours spent on your elbows...
-
- Posts: 3485
- Joined: Sat May 06, 2006 6:05 pm
Re: 44C Annual issues - need advice
Arash-
Is the indicated airspeed in your first picture normal for cruise or were you in a descent? I never see more than 105mph ias at 2500rpm.
Is the indicated airspeed in your first picture normal for cruise or were you in a descent? I never see more than 105mph ias at 2500rpm.
Richard Pulley
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
2023 Best Original 170A at Sault Ste. Marie
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
2014-2016 TIC170A Past President
1951 170A, N1715D, s/n 20158, O-300D
2023 Best Original 170A at Sault Ste. Marie
Owned from 1973 to 1984.
Bought again in 2006 after 22 years.
It's not for sale!
- Ryan Smith
- Posts: 1210
- Joined: Tue Nov 25, 2008 4:26 am
Re: 44C Annual issues - need advice
Not Arash, but I can bank on 115-120mph straight and level indicated at 2450 RPM in 56D (stock 52 B). I ferried a friend up to Danville, VA to get a 1949 A model for an annual at our field, and he said that he was only getting about 105-110mph at the same power settings. Neither airplane has wheel pants, though I have smaller tires (6.00x6 versus 7.00x6 on the A model). No green on either airplane.