Mack B series

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Mack B Model
1961MackB95.jpg
Overview
Manufacturer Mack Trucks
Production Worldwide
Body and chassis
Class Truck
Body style Truck (bonneted cab)
Powertrain
Engine Thermodyne 707 (11.6L) inline 6 or 255hp V8
Transmission Mack duplex (5x2), triplex (5x3) or quadruplex (5x4) manual transmissions
B Model Mixer

The Mack B Model was a heavy truck produced by Mack Trucks between 1953 and 1966.[1] It is perhaps the best known classic Mack truck and many still survive to this day in both restored and unrestored conditions. Some owners still use them daily for both business and leisure. They were available as fire trucks, school buses and in a variety of truck configurations. The B model was replaced by the R Model.[2][3]

Model numbers & letters[edit]

  • 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

Engines[edit]

The B Model offered 10 different gasoline engines, from a 291 cu in (4.8 L) with 107 hp (80 kW) in the B20 to a 707 cu in (11.6 L) with 232 hp (173 kW) in the B70. The B would be the last Mack model to use gasoline engines in any numbers.

A wide range of diesels was also offered. From the B61 up the ENDT 673 turbocharged I6 and END 864 V8 were offered. From the B73 up Cummins 855 cu in (14.0 L) I6s up to the NTC335 were available.

The table shows the largest gasoline and diesel engines in the series.

Model Engine Displacement Type Horsepower Torque
B20 EN291 291 cu in (4.8 L) G I6 107 hp (80 kW)@2800 232 lbf·ft (315 N·m)@1400
B30 EN331 331 cu in (5.4 L) G I6 122 hp (91 kW)@2800 264 lbf·ft (358 N·m)@1400
B4X EN414 413 cu in (6.8 L) G V8 214 hp (160 kW)@4000
END673 672 cu in (11.0 L) D I6
B53 END673
B6X EN540 540 cu in (8.8 L) G I6 185 hp (138 kW)@2400 445 lbf·ft (603 N·m)@1300
ENDT673 672 cu in (11.0 L) TD I6
END864 864 cu in (14.2 L) D V8
B7X EN707 707 cu in (11.6 L) G I6 205 hp (153 kW)@2100 615 lbf·ft (834 N·m)@1200
NTC335 855 cu in (14.0 L) TD I6 335 hp (250 kW)@2100
B8X EN707
NTC335

(Type: G=gasoline, D=diesel, TD=turbocharged diesel)[4]

See also[edit]

References[edit]

  1. ^ Corporate History: 1950-1959 - Mack Trucks.com
  2. ^ Corporate History: 1960-1969 - Mack Trucks.com
  3. ^ Warth, Thomas E. (1998). Mack Trucks Photo Gallery. Iconografix. pp. 151–164,164–165,167–168, 170–177, 179–185, 188, 195, 197, 204–207. ISBN 1-882256-88-3. 
  4. ^ Forier, Louis C., ed. (1973). Motor’s Truck & Diesel Repair Manual (26 ed.). Motor. pp. 1003–1004, 1107–1109, 1250. ISBN 0-910992-16-9. 

External links[edit]