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Pitman Arm bushing Problem
Posted by: BobV66Vair ()
Date: February 08, 2020 08:56AM

I am having an issue with the nylon pitman arm bushing. I had a new steel sleeve and bushing pressed in but the bolt is so tight it won't turn. It seems like the bolt should rotate freely. When I removed the old one it was because the steering got really hard to turn. I thought a new bushing would solve the problem.

The bolt also has to be torqued down a lot to even get the cotter pin through it. That seems like it is creating a lot of friction/bind between the pitman arm and the drag link. Is there supposed to be a way to give the pitman arm a friction free attachment? Do I have the hole thing in upside down?

Before I take a rat-tail file to it, is there a proper method to ream that nylon out. Is there a spec. for how far to ream?

Help much appreciated!

Bob Vinnacombe
Sandy, Oregon
1965 Corsa 140 stock
1966 Monza Soon to be race car
1968 Monza Parts for now

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Re: Pitman Arm bushing Problem
Posted by: Wagon Master ()
Date: February 08, 2020 09:16AM

You'd have to measure the diameter of the bolt, but my fuzzy memory tells me 9/16" is the magic number.

'29 Ford Model A Tudor
'61 700 Lakewood 110 4 speed
'69 Monza Convert. 140 Auto.
'70 Dodge Challenger R/T 440 4 speed

Been aircooled since 1973
Northwest Ohio

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Re: Pitman Arm bushing Problem
Posted by: RexJohnson ()
Date: February 08, 2020 09:17AM

There are bushings that are made to use without the metal sleeve. It sounds like you may have one of them.

RJ tools
Salem,Oregon

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Re: Pitman Arm bushing Problem
Posted by: BobV66Vair ()
Date: February 08, 2020 09:28AM

Rex, I bought the "whole assembly" from Clarks. They show a photo with the thing assembled. How do I determine which I have if Clarks doesn't show a difference. They do offer just the nylon bushing but say it goes in the shell of the rubber version. That sound you hear is me tearing out my hair!

Bob Vinnacombe
Sandy, Oregon
1965 Corsa 140 stock
1966 Monza Soon to be race car
1968 Monza Parts for now

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Re: Pitman Arm bushing Problem
Posted by: davemotohead ()
Date: February 08, 2020 09:42AM

Can you post a picture of how it is installed?







1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Pitman Arm bushing Problem
Posted by: BobV66Vair ()
Date: February 08, 2020 10:51AM

Dave, I can take a photo but it is installed just like the picture in the Clark's catalog, Page 33

The bolt Clarks supplied with the new nylon bushing setup is .02 larger diameter on the shaft than the old bolt. My old nylon bushing is very loose with the old bolt. I suspect that is worn out. It seems like the pitman arm is at interference with the drag link. That seems to be happening because in order to get the cotter pin into the bolt/nut, it has to be really tight. I just don't know how this darn thing is supposed to fit.angry smiley

Bob Vinnacombe
Sandy, Oregon
1965 Corsa 140 stock
1966 Monza Soon to be race car
1968 Monza Parts for now

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Re: Pitman Arm bushing Problem
Posted by: davemotohead ()
Date: February 08, 2020 12:22PM

Maybe use the old bolt with the new bushing or the new bolt with the old bushing? The bolt is a press fit into the drag link, as in the tapered end of the bolt needs to be wedged into the drag link as to become one with it and immovable when tight, the bushing slides on the bolt, not in the drag link, that bolt should be tight!







1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Pitman Arm bushing Problem
Posted by: BobV66Vair ()
Date: February 08, 2020 12:40PM

davemotohead Wrote:
-------------------------------------------------------
> Maybe use the old bolt with the new bushing or the new bolt with the old bushing? The bolt is a press fit into the drag link, as in the tapered end of the bolt needs to be wedged into the drag link as to become one with it and immovable when tight, the bushing slides on the bolt, not in the drag link, that bolt should be tight!


PM Sent Dave

Bob Vinnacombe
Sandy, Oregon
1965 Corsa 140 stock
1966 Monza Soon to be race car
1968 Monza Parts for now

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Re: Pitman Arm bushing Problem
Posted by: Wagon Master ()
Date: February 08, 2020 12:48PM

What is the shank measurement of the new bolt.

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Re: Pitman Arm bushing Problem
Posted by: BobV66Vair ()
Date: February 08, 2020 01:23PM

.560 on the bolt section. Then it tapers down for the last section to fit into the pitman arm.

Bob Vinnacombe
Sandy, Oregon
1965 Corsa 140 stock
1966 Monza Soon to be race car
1968 Monza Parts for now

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Re: Pitman Arm bushing Problem
Posted by: 63turbo ()
Date: February 08, 2020 01:49PM

For what it is worth, when I installed that same bushing, it was tight, and ended up needing some opening up. After a few years, it got tight again and began squeaking a bit. I got the bolt back out and it had some plastic on it so I cleaned it off thoroughly then greased it and put it back in, which was 15-20 years ago now. No problems with it since! I think the nylon sometimes gets compressed after its installed, then the bolt hole gets smaller. On my other early it didn't happen, but it did on this one.

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: Pitman Arm bushing Problem
Posted by: jjohnsonjo ()
Date: February 08, 2020 02:16PM

63turbo Wrote:
-------------------------------------------------------
> For what it is worth, when I installed that same bushing, it was tight, and ended up needing some opening up. After a few years, it got tight again and began squeaking a bit. I got the bolt back out and it had some plastic on it so I cleaned it off thoroughly then greased it and put it back in, which was 15-20 years ago now. No problems with it since! I think the nylon sometimes gets compressed after its installed, then the bolt hole gets smaller. On my other early it didn't happen, but it did on this one.


Pretty much had a similar experience, not as tight as yours, but it would not return to center on its own.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa


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Re: Pitman Arm bushing Problem
Posted by: TerribleTed ()
Date: February 08, 2020 02:25PM

I have also hard the nylon bushings properly installed be too tight to operate properly. I have also had them be just right. On the ones that are too tight I enlarge the inside of the bushing by sanding with sticky back sandpaper on a small socket with an air ratchet and keep test fitting until I get a nice function and assembly.

---------------------------------------------------------------------------------------------------------

Avid Corvair hobbiest since 1984.
I have personally performed ground up restoration on over 20 Corvairs.
I currently work full time at restoring and repairing Corvairs.
Located in the Atlanta Georgia area.
[www.facebook.com]

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Re: Pitman Arm bushing Problem
Posted by: 63turbo ()
Date: February 08, 2020 03:33PM

Delrin is probably the better material choice than nylon, as it machines better and doesn't change its dimensions as much when exposed to water. It is amazing how much more water nylon will absorb! The other thing, Delrin will give a more consistent hole size when drilling and reaming, although like all plastics that I'm familiar with, the hole will normally go undersize .001" or a bit more, depending on the size of the hole, and nylon is more prone to this!

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: Pitman Arm bushing Problem
Posted by: davemotohead ()
Date: February 08, 2020 03:51PM

I used to make them from nylatron For CA Vairs, its a molly infused self lubricating Delrin type material, they worked great! I made front end bushing kits for Corvair race cars as well.







1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

Attachments:


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Re: Pitman Arm bushing Problem
Posted by: pvholgado ()
Date: February 08, 2020 03:53PM

davemotohead Wrote:
-------------------------------------------------------
> I used to make them from nylatron For CA Vairs, its a molly infused self lubricating Delrin type material, they worked great! I made front end bushing kits for Corvair race cars as well.

Dave, Stop teasing those of us that missed out getting a set....lol

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Re: Pitman Arm bushing Problem
Posted by: Lane66m ()
Date: February 08, 2020 04:13PM

Dave:

Do you have any leftovers?

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: Pitman Arm bushing Problem
Posted by: davemotohead ()
Date: February 08, 2020 04:18PM

Lane66m Wrote:
-------------------------------------------------------
> Dave:
>
> Do you have any leftovers?
--------------------------------
I have a few for my own use that I saved, My Machinist buddy used to make them for me on a screw machine, But he passed away 2 Christmas's ago, I have not found anyone with a screw machine who can make these in my area any more.







1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Pitman Arm bushing Problem
Posted by: Lane66m ()
Date: February 08, 2020 04:21PM

Keep in mind if you find a machinist to make some.

Al Lane
Ellabell, GA 31308

1966 Monza Coupe, 110 hp, 4 Spd
1966 Monza More Door 110 hp, PG
1968 Camaro SS Coupe 350 CI 295+ hp PG
1964 Greenbrier Deluxe, 6 dr, 80 hp car engine, PG
1947 Farmall A tractor 15 hp


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Re: Pitman Arm bushing Problem
Posted by: MattNall ()
Date: February 08, 2020 04:39PM

Who's got a small lathe?

[www.ebay.com]



MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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