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  • 3 weeks later...
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Nice looking truck, good to see one rust free and with a good cab and hood! 

ST in the model implies it's 38k rears, not 44. What's the front axle rating? Could make a nice light duty tandem dump truck for someone if the front axle has any beef to it.

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6 minutes ago, JoeH said:

Nice looking truck, good to see one rust free and with a good cab and hood! 

ST in the model implies it's 38k rears, not 44. What's the front axle rating? Could make a nice light duty tandem dump truck for someone if the front axle has any beef to it.

I always thought the ST meant six wheel tractor.     terry:MackLogo:

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Pretty sure it denotes Camelback rating. 38k is ST, 44k is S, 55k+ is SX... 

I don't think Mack knows if it's getting a 5th wheel or a stake body when they put a model number on it.

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My information for the suffix is as follows

 

T - Tractor

S - Six wheel chassis

L - Light weight components

X - Extreme duty

 

 

Before Don Schumaker retired you could get a copy of the FS2 form (Factory Order) practically overnight, but now it takes months to get the information. His knowledge is missed.

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  • 3 weeks later...

Well I believe the ST denotes six wheel tractor i currently own a 1987 R686ST with a 44k suspension ran the vin past mack to confirm as built oddly I had owned a 1989 R688ST with a 38k suspension both have an e6 350 so not sure what R685,R686, R688 specifically denote

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On 5/14/2019 at 11:40 AM, puppy said:

1988 R688ST
E6 350 - Fresh in frame overhaul
9 speed Fuller 
Double frame
24.5 good rubber
Mack camel back rears -44K
Air slide 5th wheel
Wet kit
Air ride cab
A/C truck - not working
Rust free clean southern truck

$16000.00 

 

731-four four six- eight three zero six

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IMG_20190104_082716880_HDR.jpg

IMG_20190104_082735190_HDR.jpg

IMG_20190104_082755878_HDR.jpg

nice clean looking R Model

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