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M1079 Captive Spring images

coachgeo

coachgeo

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putting out a request for any pics, videos, drawings, specifications..... anything folk out there might have on the mount system of the M1079.

Done ton of search and there seems to be little out there on the springs specs Could have swore there was a tiny tiny bit of info and one pic in here of the captive springs but I can't find it.

Any help appreciated. Thanx.

PS- Also anyone know what years did they retrofit the chassis frame with strengthening braces .. and was that brace used from then on.... or was something else modified to make that brace no longer needed? (saw the frame braces in a thread in here sometime back... buyer got two identical braces and not a left right so was stumped on what to do next.
 
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Gunny 0369

Gunny 0369

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coachgeo said:
putting out a request for any pics, videos, drawings, specifications..... anything folk out there might have on the mount system of the M1079.

Done ton of search and there seems to be little out there on the springs specs Could have swore there was a tiny tiny bit of info and one pic in here of the captive springs but I can't find it.

Any help appreciated. Thanx.

PS- Also anyone know what years did they retrofit the chassis frame with strengthening braces .. and was that brace used from then on.... or was something else modified to make that brace no longer needed? (saw the frame braces in a thread in here sometime back... buyer got two identical braces and not a left right so was stumped on what to do next.
Click to expand...
4C72230C-064A-4567-A37F-1746A3D37902.pngCoach, saw this captured spring in Missouri.
( sorry) my way of bumping...
My 1086s MHC has the super heavy frame mod ...
hope your well
 
coachgeo

coachgeo

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Third From Texas

Third From Texas

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Rgr that.

I've no current plans to pull mine but I may disconnect and lift it when I do my plumbing.

Or perhaps next time I run the air out to do something, I will knock one off.

I know that the spring specs come up all the time, so if I do I will have the local spring place spec it out for me.
 
R

Ronmar

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Third From Texas said:
Rgr that.

I've no current plans to pull mine but I may disconnect and lift it when I do my plumbing.

Or perhaps next time I run the air out to do something, I will knock one off.

I know that the spring specs come up all the time, so if I do I will have the local spring place spec it out for me.
Click to expand...
I was bored once upon a time and I used some google-fu on the part and cage in the 24P for that spring. It got me to a component at the original manufacturer/provider that appeared to be the correct dimensions. I think they were based out of cali... Unfortunately I did not save that info or a link. But if I recall correctly the spring rate was approximately EDIT: musta accessed the wrong memory packet upstairs, see next post for search results and spring specs.

I was contemplating not using plain springs on mine, the rate and travel was all I was interested in... Another data point is how much compression/pre-load does the stock installation provide...
 
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R

Ronmar

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Wow, my memory must be getting bad... the FSCM takes you to century spring co(in Ca) and the part number 4115 gets you to the below listed part.
1003 LB/IN but only about 1.3” of travel(free length to solid length)... musta mixed this up with something else, or what some other method was going to provide my design:)

At any rate, this is where the part number lead me and it looks about right from what I have seen...

 
coachgeo

coachgeo

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Ronmar said:
Wow, my memory must be getting bad... the FSCM takes you to century spring co(in Ca) and the part number 4115 gets you to the below listed part.
1003 LB/IN but only about 1.3” of travel(free length to solid length)... musta mixed this up with something else, or what some other method was going to provide my design:)

At any rate, this is where the part number lead me and it looks about right from what I have seen...

Click to expand...
interesting.... 1.3 inch compressed then it starts pushing the chassis up on the compressed side. wonder about stretch side???

Would be interesting to see how quickly the solid mount tie at that spring/bolt between the box the chassis begins to pull the box off center with a rear axle droop. and/or rear axle stuff. Same for front axle and cross axle
 
R

Ronmar

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coachgeo said:
interesting.... 1.3 inch compressed then it starts pushing the chassis up on the compressed side. wonder about stretch side???

Would be interesting to see how quickly the solid mount tie at that spring/bolt between the box the chassis begins to pull the box off center with a rear axle droop. and/or rear axle stuff. Same for front axle and cross axle
Click to expand...
Or the box flexes/twists:)
 
chucky

chucky

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This isnt exactly info on spring rateings but go to govplanet this morning and put m1085 in the search box and 2 will appear and the left one is a 1996 S&S 1085 and look at the way they used what looks like the same springs but the captured design i havnt seen the way they did it looks like the way to go ! picture 14 and 61
 
R

Ronmar

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chucky said:
This isnt exactly info on spring rateings but go to govplanet this morning and put m1085 in the search box and 2 will appear and the left one is a 1996 S&S 1085 and look at the way they used what looks like the same springs but the captured design i havnt seen the way they did it looks like the way to go ! picture 14 and 61
Click to expand...
Thats basically how they did the 1079 with a bolt down thru the top and bottom brackets, thru the spring to a washer and nut. When the main frame twists down and away from the upper subframe, the subframe pulls up on the bolt and compresses the spring. on this one they put a guide plate outside welded to the top, the 1079 they used a pocket with guide plates on the bottom and the upper bracket sets down into the pocket to retain it laterally and longitudinally. The spring hangs down below the pocket. The ones you found look similar to ones I have seen on tank truck subframes.
 
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