Caster Adjustment?

[Plymouthy Adams]

so...explain to me the purpose of the bushing with the offset hole......

 

you are confusing king pin arrangements with that of the ball joint whereas the ball joint has no provision for movement...the outer A-arm of the king pin with the eccentric bush does.  The later ball joint would be as you think this should be on the inner A-arm with slotted adjustments 

Edited August 1, 2021 by Plymouthy Adams

[51Traveler]

7 minutes ago, Plymouthy Adams said:

so...explain to me the purpose of the bushing with the offset hole......

Show me which one. 

[Plymouthy Adams]

there is but one on the outer end of the A-arm.....it is the one with the word washer above it...seriously...you should send this unit out for repairs.....not only because you show no concept of the arrangement/adjustment....I would question if you have the tools and gauges to correctly set this...Not picking on you mind you....just reading the crime scene....

[51Traveler]

8 minutes ago, Plymouthy Adams said:

there is but one on the outer end of the A-arm.....it is the one with the word washer above it...seriously...you should send this unit out for repairs.....not only because you show no concept of the arrangement/adjustment....I would question if you have the tools and gauges to correctly set this...Not picking on you mind you....just reading the crime scene....

Ummm the one with the word  "washer" is the upper shock bolt. 

[Plymouthy Adams]

1 minute ago, 51Traveler said:

Ummm the one with the word  "washer" is the upper shock bolt. 

 

If you think that is the arrangement....have fun.....

[51Traveler]

By the thr way I'm a SAE certified mechanic for over 20 years. 

[51Traveler]

1 minute ago, Plymouthy Adams said:

 

If you think that is the arrangement....have fun.....

Ya it is. 

[Plymouthy Adams]

2 minutes ago, 51Traveler said:

By the thr way I'm a SAE certified mechanic for over 20 years. 

this is why I say never if at all possible carry your vehicle to a garage......by the way you are not the only one here with SAE certifications...

 

hopefully you will see your error.....

[51Traveler]

2 minutes ago, Plymouthy Adams said:

this is why I say never if at all possible carry your vehicle to a garage......by the way you are not the only one here with SAE certifications...

 

hopefully you will see your error.....

Lol. No error here

[Plymouthy Adams]

2 minutes ago, 51Traveler said:

Lol. No error here

I believe I will have the last laugh on this one...though that is not my intent here....seriously trying to help you....I am out of this as it is evident you cannot read the parts breakdown that you posted.  Good luck.....

[Plymouthy Adams]

13 minutes ago, 51Traveler said:

Ummm the one with the word  "washer" is the upper shock bolt. 

 

I would love to know why there would be an eccentric on a upper shock mount....

[51Traveler]

13 minutes ago, Plymouthy Adams said:

 

If you think that is the arrangement....have fun.....

That's the shock bolt. You need to learn to read schematics

[Plymouthy Adams]

I see your problem....you found the word washer above the word fitting and I stated the bushing in question had the word washer above it.......again though, you have not studied the very breakdown you posted...enjoy your day.  This is going nowhere....

[51Traveler]

10 minutes ago, Plymouthy Adams said:

I see your problem....you found the word washer above the word fitting and I stated the bushing in question had the word washer above it.......again though, you have not studied the very breakdown you posted...enjoy your day.  This is going nowhere....

No mention of the word bushing at all. Have a nice day. 

[Plymouthy Adams]

learn to follow the conversation you started......the very reply was in reference to the eccentric.....which I kept mentioning but went unrecognized by you multiple times.  Have you figured out the parts breakdown now.....?

[51Traveler]

5 minutes ago, Plymouthy Adams said:

learn to follow the conversation you started......the very reply was in reference to the eccentric.....which I kept mentioning but went unrecognized by you multiple times.  Have you figured out the parts breakdown now.....?

Did from the beginning. 

[Andydodge]

51 Traveler........can I join in.........the eccentric adjustment is at the tire end of the upper A Arm, there is a eccentric "bushing" that fits into the vertical spindle which also holds the kingpin.........this spindle has a lockbolt at its top that is usually in a horizontal position going from the tyre side into the top of the spindle which has the eccentric bushing sitting in it.......you loosen that lockbolt which allows the bushing to be turned usually using a small specialised open mouth spanner that locates on the "hex" portion of the bushing.......by turning this bushing hex the spindle is very slightly moved "in" or "out" which adjusts the camber..........the spot where the bushing actually sits on its "pin or bolt" is where some caster can be adjusted albeit not by much by slightly moving the spot where the bushing and therefore the spindle/king pin assembly locates on the bolt...........in your pic that you posted showing the words..."steering knuckle Support" written in on the pic from the workshop manual there is a what looks like a handdrawn(maybe not?) line going from the end of these words towards the spindle........this line goes through the BUSHING that I am referring to which is the camber adjustment bushing that Plymouthy refers to..........I trust this makes sense..................Andy Douglas  

Edited August 1, 2021 by Andydodge
more info

[Veemoney]

Eccentric Bushing for adjustment circled in blue. Hope this helps along with Andy's explanation.

 

[chrysler1941]

[Andydodge]

51Traveler...............in the above pic that Chrysler1941 posted..........1 is the horizontal lockbolt I mention..........2 is the hex that is machined into the actual Bushing that is inside the upper part of the spindle..........3 is the spindle as shown in both views.............and 4 is the short specialised open mouth spanner that I refer to..............by the action of turning the spanner(# 4 in the 2nd pic) held onto the hex "nut" you turn the bushing which in turn pushes the upper end of the spindle in or out as the hole in the bushing is offset to one side, or "eccentric" to the centre of the bushing which in turn changes the camber angle of the kingpin............hope this makes sense............Andy Douglas 

[James_Douglas]

In addition to all the above...

 

That cam shaped bushing can be "threaded" forward and back on that little threaded shaft. If you move it toward the front or the read you get a change in the CASTOR. Once it is at that point on that little shaft ONE revolution changes the CAMBER.

 

So you CAN adjust both Castor as you adjust camber.  It is a PITA as any movement of that "eccentric" or cam shaped bushing changes BOTH AT THE SAME TIME.

 

The other issue is the lower and upper control arm bushing. If they are not properly centered, like someone at some point changed them with the proper tool in the manual, it will toss off the Castor and no amount of turning the eccentric will make it correct. I have this issue with my 1949.

 

The other issue is king pin binding. That can cause wander as well. Many of the cars after 1948 model year had one busing and one BEARING in the king pins. Often they get replaced with all bushings and this causes a problem.

 

In the case of my 1949, I need more Castor than I can get. I plan on "cheating" and I am going to screw my lower inner control arm pivot forward one rotation. That will move the bottom of the king pin forward and give me more CASTER.  One has to remove one bushing from the control arm to do that as well as unload the spring.

 

I suggest that the poster goes over to the Imperial Site and reads all the MOPAR service booklets related to suspension from 1946 to 1954. It does a very good job of explaining it all.

 

James

 

 

[51Traveler]

31 minutes ago, James_Douglas said:

In addition to all the above...

 

That cam shaped bushing can be "threaded" forward and back on that little threaded shaft. If you move it toward the front or the read you get a change in the CASTOR. Once it is at that point on that little shaft ONE revolution changes the CAMBER.

 

So you CAN adjust both Castor as you adjust camber.  It is a PITA as any movement of that "eccentric" or cam shaped bushing changes BOTH AT THE SAME TIME.

 

The other issue is the lower and upper control arm bushing. If they are not properly centered, like someone at some point changed them with the proper tool in the manual, it will toss off the Castor and no amount of turning the eccentric will make it correct. I have this issue with my 1949.

 

The other issue is king pin binding. That can cause wander as well. Many of the cars after 1948 model year had one busing and one BEARING in the king pins. Often they get replaced with all bushings and this causes a problem.

 

In the case of my 1949, I need more Castor than I can get. I plan on "cheating" and I am going to screw my lower inner control arm pivot forward one rotation. That will move the bottom of the king pin forward and give me more CASTER.  One has to remove one bushing from the control arm to do that as well as unload the spring.

 

I suggest that the poster goes over to the Imperial Site and reads all the MOPAR service booklets related to suspension from 1946 to 1954. It does a very good job of explaining it all.

 

James

 

 

Where do I find the Imperial site?