Mack f685lst

[14cxu613]

I know it’s been discussed but I can’t find it. Can someone explain the 685lst for me? I know the f is the model but the rest is greek

[Hans Remmers]

On 10/18/2017 at 9:04 PM, 41chevy said:

• Chassis numbers (GVW Rating):
  • 4xx -
  • 6xx -
  • 7xx -
  • 8xx -

Note: the xx is the place holder for the engine code. 

Examples

R607 END673

R609 END711

R611 ENDT673C

R612 ETAZ673 (300+)

R615 END864 V8

R626 6v92 Detroit

R685 ENDT675 (237 Maxidyne)

R686 ENDT676 (300 Maxidyne)

R688 E6350

R719 ENDT864 V6

R795 ENDT865 V8

R797 ENDT866 V8

R747 290 Cummins

R763 335 Cummins

R767 350 Cummins

•  

• • T - Tractor
  • S - Six wheel chassis
  • L - Light weight components
•  
• RS7xxLS as our example:

  • R = R model

    S = an S after the R indicates it has a steel frame. This was a western Hayward thing i believe.

    7 = has to do with the chassis GW rating. 800/900 series were extra and super heavy duty chassis.

    XX = these two numbers are engine codes.

    L = Hayward models had this letter to denote the cab used light weight components like aluminum doors.

    S = six wheel tandem chassis. so essentially it is a 6x4 chassis.

    Another example RW613:

    The W stands for Western and together with the R means a superliner or RW. 13 is a Cummins NTC engine.

    If there is an SX after the number code like R600SX it means you have a heavy duty tandem

    X - Extreme duty

 

 

This was the first thing I found to help you

[Draggin Wagon]

2nd and 3rd digit (85) = ENDT 675 engine

L= light weight or weight reduced, some aluminum components used

S = six wheel (tandem)

T = tractor 

l