Basic Mack Model Codes

[41chevy]

There is always a few questions on Mack model numbers. Here is a basic list, the 6 series also crosses to the 8 series trucks.You should be able to figure out almost any North American Mack. Paul
The leading # refers to the chassis, and the last two digits refers to the engine in the truck. Here's a few of the 600 series for you.
607--- END673
609--- END711
611--- ENDT673C
612--- ETAZ673A (300+)
615--- END864
626--- 6V92 Detroit
685--- ENDT675
686--- ENDT676
688--- at first E6-350, later designated all Econdyne series 6 cylinder engines
690---later code for all Maxidyne series 6 cylinder engines.

Here's a list for the RWS/RWL700 first generation Superliners.
785--ENDT675
786--ENDT676
712--ETAZ673A(300+)
795--ENDT865
797--ENDT866
770--8V92 Detroit
747--NTC290 Cummins(later 300 Cummins also used this same designation)
766--NTC400 Cummins
767--NTC350 Cummins
768--KT450 Cummins
721--E9-400
722--E9-440
754--Cat 3406

RB - Axle back
RD - Heavy Duty R
RM - 4x4 Municipal/maintenance chassis
RMM - 6x6 Municipal/maintenance chassis
RS - Western R series, S stands for steel frame
RL - Western R series, L stands for Aluminum frame
RW - Western series, replaced by the Mack Super-Liner
Chassis numbers (GVW Rating):
4xx -
6xx -
7xx -
8xx -
Note: the xx is the place holder for the engine code.

Suffix letters:
T - Tractor
S - Six wheel chassis
L - Light weight components
X - Extreme duty

B Model Chassis by weight starts at 10,000 lbs.
B1x -
B2x -
B3x -
B4x -
B5x -
B6x -
B7x -
B8x -
Chassis letter guide:

B - school bus chassis
C - flat face cowl for the addition of a delivery body
E - built for export
F - fire truck chassis
L - light weight or weight reduced by using aluminum components
P - platform chassis (single axle straight truck)
R - right hand drive. This designation was started in 1964 but right hand drive available
S - six wheel chassis (tandem axle)
T - tractor chassis
X - severe or extreme service chassis

F series COE
F6xx
F7xx
F8xx
F9xx

[Deleted]

That helps a lot. Thanks.

[Arnd]

grate all that information. thanks alot for them

so long arnd

[Deleted]

Would this list apply to the Cruiseliner (WS-Series)?

[41chevy]

Aug 2, 2011 19:28:27 GMT -5 @jimb said:

Would this list apply to the Cruiseliner (WS-Series)?

Pretty much all should translate except for cab length. The WS or western is the most common, about 12,000 made. The W is the Cruiseliner designation and the S is steel frame. If it was a WL it would be a Cruiseliner with an Aluminum Frame. Most are 6 series which is a 60,000 lbs rating. There may be a engine call out problem as the cruiseliners had 31 engine options. I can dig out my cruiseliner catalogs if you need more info. Paul

[Deleted]

What would be the model number if you built the AMT kit straight from the box? I believe it has a ENDT676 in it.

[41chevy]

Aug 3, 2011 10:16:10 GMT -5 @jimb said:

What would be the model number if you built the AMT kit straight from the box? I believe it has a ENDT676 in it.

Two ways, with the steel chassis END 676 and 6 (10) wheels, it would be a WS686S. Run it as the Aluminum chassis and componets it would be a WL686S. I think it ha the 300+ h.p. with the Tip Turbine intercooler if so it would be a WS688S. Paul

[Deleted]

Thanks. The AMT kit isn't a WS786ST?

[41chevy]

Aug 3, 2011 21:24:18 GMT -5 @jimb said:

Thanks. The AMT kit isn't a WS786ST?

The 7 is 70,000 GVW in stead of the 60,000 that I assumed it was but the difference in GVW is 3 spring leaves and the T stands for tractor but Mack at that time assumed that COE's weren't used as anything but tractors, so most times left off the T on the F and W series COEs. Confusing isn't it? Paul

[Deleted]

It's sort of like Peterbilt, it makes my head hurt!

[41chevy]

Aug 4, 2011 17:30:10 GMT -5 @jimb said:

It's sort of like Peterbilt, it makes my head hurt!

I think slightly worse The L series cam before the B, the H came before the F and W usually stood for western series (RW700) now thats confusing. ;D ;D ;D