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5-ton 6×6 truck

April 30, 2024

The 5‑ton 6x6 truck, officially "Truck, 5-ton, 6x6", was a class of heavy-duty six-wheel drive trucks used by the US Armed Forces. The basic cargo version was designed to transport a 5-ton (4,500 kg) load over all roads and cross-country terrain in all weather. Through three evolutionary series (M39, M809, and M939) there have been component improvements, but all trucks were mechanically very similar. They were the standard heavy-duty truck of the US military for 40 years, until replaced by the Medium Tactical Vehicle (MTV) beginning in 1991.

M54 (M39 series)
M813 (M809 series)
M923 (M939 series)

History edit

A 20 June 1945 report by the Army Ground Forces Equipment Review Board recommended that all 4‑ton to 6‑ton tactical trucks should be replaced by a single standard 5‑ton (4,536 kg) 6x6 truck series. In 1949 specifications were set and truck manufactures began working on prototypes. Chrysler, GMC, and Mack's designs were advanced, International Harvester's was a conservative conventional, similar in size and layout to the earlier 6-ton (G512) series.[1][2][3]

The International Harvester design was chosen and rushed into production in January 1951, it would be standardized as the M39 series. Kaiser (renamed Kaiser-Jeep in 1963) also became a major manufacturer, with Diamond T and Mack building smaller numbers. In 1963 Kaiser-Jeep began building the final order, production was completed in 1965.[2][4][5]

In the 1960s more trucks were required, and the Army wanted to replace the multifuel engines with a standard diesel. AM General (successor of Kaiser-Jeep) developed an updated and redesigned version of the M39 series. Standardized as the M809 series, the primary difference was the engine. The hood, frame, and fenders were lengthened to make room for the larger engine, and it had a redesigned grille. All had an air cleaner on the left front fender, a quick visual way to tell them from the earlier M39 series. Jeep/AM General built all M809s between 1969 and 1982.[6][7]

The M939 series was a Product Improvement Package of the M809, with updated engine, transmission, and brakes. A new, larger cab and tilt-forward hood were a major visual change from earlier trucks. Early M939s were rebuilds of M809 vehicles, suffix –A2 are new production by Bowen-McLaughlin-York/BMY with later model Cummins engine.[8][9][10]

Engines edit

The 5-ton family had five different engines in its life, one gasoline, one multifuel, and three different diesels.[11][12]

The M39 series had three different engines, all with different operating characteristics. The 1951 design was originally powered by a Continental R6602, a 224 horsepower (167 kW) 602 cubic inches (9.9 L) inline 6 cylinder gasoline engine. These models had no external air filter and had the exhaust outlet under the right side of the truck's body. The engine was a successful design but by 1960 its 4 miles per US gallon (1.7 km/L) and the use of gasoline as a fuel in heavy trucks were becoming a problem.[2][13][14]

In 1962–1963 Diamond T and Mack began retrofitting M52 semi-tractors and M54 cargo trucks to the -A1 standard. They had a Mack ENDT-673, a 210 horsepower (160 kW) 672 cubic inches (11.0 L) turbocharged inline 6 cylinder diesel engine. These were the only diesel M39 series models.[2]

The -A2 had the army standard design LDS-465-1 multifuel engine built by Continental. It was a 175 horsepower (130 kW) 478 cu in (7.8 L) turbocharged inline 6 cylinder multifuel engine. Using M.A.N. technology it was a diesel type that could also use other fuel oils or a gasoline/oil mix in an emergency. Also used by the M35 2+1⁄2-ton series this engine was successful in the smaller trucks but was underpowered compared to all other-5-ton models.[2]

The M809 series used a Cummins NHC250 engine, a 855 cubic inches (14.0 L) naturally aspirated inline 6 cylinder diesel engine developing 240 horsepower (180 kW) at 2100rpm and 685 pound force-feet (929 N⋅m) of torque at 1500rpm. All models of the M809 series used this engine throughout their service life. The N series was a very successful commercial design, with a conservative rating the engine was more powerful and less stressed than the multifuel engine.[7][15][16]

The M939 and M939A1 models were rebuilds of the M809 series and used their NHC 250 engine. Although the design is dated it is still powerful and reliable in service and was not significantly up-graded. The M939A2 new production models use a modern Cummins 6CTA8.3 240 horsepower (180 kW) 504 cubic inches (8.3 L) turbocharged and aftercooled inline 6 cylinder diesel engine. This is also a successful commercial design.[9][17][18]

Driveline edit

The M39 and M809 series had a Spicer 5 speed manual synchromesh transmission. The M939 used an Allison automatic, for better engine speed control and driving ease.[19][20][21][22]

A two speed transfer case also engaged the front axle. M39s and M809s used one which engaged the front axle automatically if the rear wheels turned faster than the front, as when the rear wheels spun. The M939s had an improved type, which always engaged the front axle in the low range, in the high range the driver could engage and disengage it with an air control.[23][24]

Chassis edit

 
Overhead drawing of M939 series

A ladder frame with three live beam axles, the front on leaf springs, the rear tandem on leaf springs with locating arms. Brakes on the M39 and M809 were air over hydraulic with drum brakes on all wheels, M939s were full air. Many trucks were available with a front-mounted 20,000 lb (9,100 kg) capacity winch.[25][26][27]

There were three wheelbases (Measurements are from the centerline of the front axle to the centerline of rear tandem). The short, used for tractors and dumps, was 167 inches (4.24 m), the long, used for cargo, wreckers, and bolsters, was 179 inches (4.55 m), and the extra long, used for long cargo, tractor wreckers, and expansible vans, was 215 inches (5.46 m).[28][29][30]

Most models had 11.00x20 size tires with dual rear tires, bridge trucks and some chassis-cabs had 14.00x20 with dual rear tires. Early M939s used 11.00x20s with dual tires, but M939A1s had 14.00x20s with single rear tires and M939A2s introduced a central tire inflation system.[28][31][32][33]

Models edit

Cargo trucks edit

 
M925A2 dropside cargo truck w/winch

Cargo trucks had a 14 ft (4.3 m) long low sided box with a bottom hinged tailgate, bodies with drop sides were also standardized. Both had removable side racks with fold down troop seats and bows for a tarpaulin. Long cargo trucks, with an extra long wheelbase, had a 20 ft (6.1 m) long box with side racks and bows for a tarpaulin. There were no drop side versions, and none had troop seats. [34][35][36]

Dump trucks edit

 
M930A2 Dump Truck w/winch

Dump trucks were used to haul sand, gravel, dirt, rubble, scrap, and other bulk materials. They had a 5 cubic yards (3.8 m3) dump body with cab protector and a tailgate that could hinge at either the top or bottom. They could be equipped with overhead bows, a tarpaulin, and troop seats, but the relatively small size of the body limited their passenger or cargo load.[34][35][36]

Medium wrecker trucks edit

 
M816 Medium Wrecker Truck

Medium wrecker trucks were used to recover disabled or stuck trucks and lift large components. A rotating, telescoping, and elevating hydraulic boom could lift a maximum of 20,000 lb (9,100 kg). Although the truck was not meant to carry a load, the boom could support 7,000 lb (3,200 kg) when towing. [34][35][36]

Tractor trucks edit

 
M818 Tractor Truck

Tractor trucks were used to tow semi-trailers up to 37,500 lb (17,000 kg) with 15,000 lb (6,800 kg) on their fifth wheel. On improved roads they could tow up to 55,000 lb (25,000 kg) with 25,000 lb (11,000 kg) on their fifth wheel.[37][38][39]

Tractor trucks normally tow a 12-ton (24,000 lb (11,000 kg) load rated 4-wheel (two axles) trailer. There are stake/platform, van, tank, and low-bed models. There is also a 15-ton (30,000 lb (14,000 kg)) low bed trailer, the heaviest possible off-road. A 25-ton (50,000 lb (23,000 kg)) low-bed trailer can be towed on prepared surfaces.[40][41]

Unlike commercial trucks the fifth-wheel can also pivot side to side, making a more flexible connection to the trailer. Even so, off-road performance is limited to relatively flat and solid ground.[37][38][39]

Medium wrecker tractor trucks edit

 
M819 Wrecker Tractor Truck

Medium wrecker tractor trucks, with an extra long wheelbase, were a wrecker with a fifth wheel mounted behind the boom. Meant for aircraft recovery, the truck could perform wrecker duties and load and tow semi trailers.[34][35]

Expansible van trucks edit

 
M291 Expansible Van Truck

Expansible van trucks had a 17 ft (5.2 m) long van body with a slide out section on each side. When the sections are extended the working floor was over 12 ft (3.7 m) wide. Some had hydraulic lift-gates.[42][43][44]

Bridge transporting trucks edit

 
M328 Bridge Transporting Truck

Bridge transporting trucks had a stake body 20 ft (6.1 m) long for carrying bridging equipment and components. In the M939 series there were no standardized bridge models, instead specialized bodies were mounted on chassis-cabs.[34][35]

Logging bolster trucks edit

 
M748 Logging Bolster Truck

Logging bolster trucks, with a bolster trailer, were used to carry long loads like logs, poles, and bridge sections. When unloaded the trailer could be loaded onto the truck. There were no bolster trucks in the M939 series.[45][35]

Chassis cabs edit

Chassis cabs were produced in different wheelbases for specialty bodies. The largest, the M39 series M139C/D, was an Honest John rocket launcher. [12][14][46][47][48]

Model numbers edit

Model wheelbase M39[28] M809[49] M939[50]
Cargo, 14 ft bed long M54 M813 M923-M926
Cargo, 20 ft bed extra long M55 M814 M927, M928
Dump short M51 M817 M929, M930
Tractor short M52 M818 M931, M932
Wrecker long M62, M543 M816 M936
Wrecker Tractor extra long M246 M819
Expansible Van extra long M291 M820 M934, M935
Bridge extra long M328 M821
Logging Bolster long M748 M815
Chassis, short short M61 M810
Chassis, long long M40 M809 M944, M945
Chassis, XL extra long M63 M811 M942, M943
Chassis, XL HD extra long M139 M812 M927, M928

Gallery edit

  •  
    M51 Dump truck
  •  
    M52 Tractor
  •  
    M816 Wrecker
  •  
    M820 Expansible Van
  •  
    M923 Cargo truck
  •  
    M927 w/drone launcher

Notes edit

  1. ^ Crismon (2001), pp. 355–356.
  2. ^ a b c d e Doyle (2003), pp. 178–188.
  3. ^ Vanderveen (1998), p. 109.
  4. ^ Crismon (2001), pp. 356.
  5. ^ Vanderveen (1998), pp. 110–113.
  6. ^ Crismon (2001), pp. 360–361.
  7. ^ a b Doyle (2003), pp. 192–200.
  8. ^ Crismon (2001), p. 361.
  9. ^ a b Doyle (2003), pp. 200–204.
  10. ^ TM 9-2320-272-10 (2004), p. 1-19.
  11. ^ Crismon (2001), pp. 356–361.
  12. ^ a b Doyle (2003), pp. 178–188, 192–204.
  13. ^ TM 9-2320-211-10 (1989), pp. 1–5, 1–6.
  14. ^ a b TM 9-500 (1962), pp. 21–31 to 21–40.
  15. ^ TM 9-2320-260-20 (1978), p. 1-34.
  16. ^ TM 9-2320-260-34-1 (1994), pp. 3–1 to 3–259.
  17. ^ TM 9-2320-272-10 (2004), p. 122.
  18. ^ TM 9-2320-272-24-1 (1992), pp. 5–157 to 5–279.
  19. ^ TM 9-2320-211-10 (1989), pp. 2–39, 2–41.
  20. ^ TM 9-2320-211-35 (1978), pp. 194–196.
  21. ^ TM 9-2320-260-10 (2003), p. 2-79.
  22. ^ TM 9-2320-272-10 (2004), pp. 1–23, 2–104.
  23. ^ TM 9-2320-211-35 (1978), pp. 154–158, 196.
  24. ^ TM 9-2320-272-23-1 (2012), p. 0003-8.
  25. ^ TM 9-2320-211-10 (1989), p. 1-2, 2–63 to 2–69.
  26. ^ TM 9-2320-272-10 (2004), p. 2-116 to 2–123.
  27. ^ TM 9-2320-272-23-1 (2012), pp. 0002–12, 0002–14.
  28. ^ a b c TM 9-2320-211-10 (1989), pp. 1–2, 1–3.
  29. ^ TM 9-2320-260-10 (2003), p. 1-25.
  30. ^ TM 9-2320-272-10 (2004), p. 1-10.
  31. ^ Doyle (2003), p. 188, 199, 204.
  32. ^ TM 9-2320-260-10 (2003), p. 1-23.
  33. ^ TM 9-2320-272-10 (2004), pp. 1–24, 1–25.
  34. ^ a b c d e TM 9-2320-211-10 (1989), pp. iii–vi.
  35. ^ a b c d e f TM 9-2320-260-10 (2003), pp. 1–11 to 1–21.
  36. ^ a b c TM 9-2320-272-10 (2004), p. 1-1 to 1–4.
  37. ^ a b TM 9-2320-211-10 (1989), pp. iii, 1–2, 2–79 to 2–82.
  38. ^ a b TM 9-2320-260-10 (2003), p. 1-17.
  39. ^ a b TM 9-2320-272-10 (2004), pp. 2–152 to 2–156.1.
  40. ^ TM 9-2330-207-14 (1983).
  41. ^ TM 55-2330-200-15-1 (1976).
  42. ^ TM 9-2320-211-10 (1989), pp. v, 1–3, 2–91 to 2–104.
  43. ^ TM 9-2320-260-10 (2003), pp. 1–19, 1–20.
  44. ^ TM 9-2320-272-10 (2004), pp. 2–21 to 2–27.
  45. ^ TM 9-2320-211-10 (1989), pp. vi, 1–3, 2–119 to 2–128.
  46. ^ TM 9-2320-211-10 (1989), p. i.
  47. ^ TM 9-2320-260-10 (2003), p. i.
  48. ^ TM 9-2800 (1953), p. 267.
  49. ^ TM 9-2320-260-10 (2003), pp. 1–4.
  50. ^ TM 9-2320-272-10 (2004), pp. 1–4.

References edit

  • Crismon, Fred W (2001). US Military Wheeled Vehicles (3 ed.). Victory WW2. ISBN 0-970056-71-0.
  • Doyle, David (2003). (2 ed.). Krause. ISBN 0-87349-508-X. Archived from the original on 2018-01-15. Retrieved 2018-04-26.
  • Vanderveen, Bart (1998). A Record of Military Macks in the Services and Beyond. After the Battle. ISBN 1-870067-09-6.
  • TM 9-500 Data Sheets for Ordnance Type Material (PDF). US Dept. of the Army. 1962. Retrieved 11 May 2018.
  • TM 9-2320-211-10 Operators Manual for Truck 5 ton, 6x6, M39 series (PDF). US Dept. of the Army. 1989. Retrieved 16 June 2019.
  • TM 9-2320-211-20 Organizational Maint. for Truck, Chassis: 5-ton 6x6 M39, M39A1, M40...M748A2 (PDF). US Dept. of the Army. 1978. Retrieved 16 June 2019.
  • TM 9-2320-211-35 DS, GS, and Depot Maint. for Truck, Chassis: 5-Ton 6x6 M39, M39A2, M40,...M748A2 (PDF). US Dept. of the Army. 1978. Retrieved 16 June 2019.
  • TM 9-2320-260-10 Operator's Manual Truck 5 ton, 6x6, M809 series (PDF). US Dept. of the Army. 2003. Retrieved 16 June 2019.
  • TM 9-2320-260-20 Technical Manual Unit Maintenance 5-ton, 6x6, M809 series Trucks (Diesel) (PDF). US Dept. of the Army. 1995. Retrieved 16 June 2019.
  • TM 9-2320-260-34-1 Direct Support and General Support Maintenance for 5-ton, 6x6, M809 Series Trucks (Diesel) (PDF). US Dept. of the Army. 1994. Retrieved 23 June 2019.
  • TM 9-2320-272-10 Operator's Manual for Truck 5 ton, 6x6, M939 series (PDF). US Dept. of the Army. 2004. Retrieved 16 June 2019.
  • TM 9-2320-272-23-1 Field Maintenance Manual for Truck, 5-ton, 6x6, M939, M939A1, M939A2 Series Trucks (Diesel). US Dept. of the Army. 2012. Retrieved 2 June 2020.
  • TM 9-2320-272-24-1 (vol. 1 of 4) (PDF). TM 9-2320-272-24-2 (vol. 2 of 4) (PDF). TM 9-2320-272-24-3 (vol. 3 of 4) (PDF). and TM 9-2320-272-24-4 (vol. 4 of 4) (PDF). Unit, Direct Support, and General Support Maintenance Manual for Truck, 5-ton, 6x6, M939, M939A1, M939A2 Series Trucks (Diesel). US Dept. of the Army. 1998.
  • TM 9-2330-207-14 Operator, Organizational, Direct Support, and General Support Maintenance Manual Semitrailer, Stake: 12-ton, 4-wheel, M127...(and others) (PDF). US Dept. of the Army. 1983. Retrieved 4 August 2019.
  • TM 9-2800 Military Vehicles. US Depts. of the Army. 1953. pp. 266–269. Retrieved 11 May 2018.
  • TM 55-2330-200-15-1 Transportability Guidance Semitrailers, 12-ton, 4-Wheel, ...(various models) (PDF). US Dept. of the Army. 1976. Retrieved 1 August 2019.
  • TM 55-2330-211-15-1 Transportability Guidance Truck, 5-ton, 6x6, M39 Series Chassis (PDF). US Dept. of the Army. 1974. Retrieved 1 August 2019.
  • TM 55-2320-260-14-1 Transport Guidance Technical Manual Truck 5-ton, 6x6, M809 Series (PDF). US Dept. of the Army. 1993. Retrieved 2 August 2019.
  • TM 55-2320-272-14-1 Transport Guidance Technical Manual Truck 5-ton, 6x6, M939-Series, M939A1-Series, and M939A2-Series (PDF). US Dept. of the Army. 1993. Retrieved 2 August 2019.

External links edit

  • M39 series at Olive-Drab.com
  • M54 series Technical Manuals at Jatonka
  • M809 series at Olive-Drab
  • M809 series at Military-Today
  • M809 series Technical Manuals at Jatonka
  • M809 series Technical Manuals at NSN Lookup
  • M939 series at Olive-Drab
  • M939 series Technical Manuals at Jatonka
  • M939 series Technical Manuals at NSN Lookup

April 30, 2024
truck, truck, officially, truck, class, heavy, duty, wheel, drive, trucks, used, armed, forces, basic, cargo, version, designed, transport, load, over, roads, cross, country, terrain, weather, through, three, evolutionary, series, m809, m939, there, have, been. The 5 ton 6x6 truck officially Truck 5 ton 6x6 was a class of heavy duty six wheel drive trucks used by the US Armed Forces The basic cargo version was designed to transport a 5 ton 4 500 kg load over all roads and cross country terrain in all weather Through three evolutionary series M39 M809 and M939 there have been component improvements but all trucks were mechanically very similar They were the standard heavy duty truck of the US military for 40 years until replaced by the Medium Tactical Vehicle MTV beginning in 1991 M54 M39 series M813 M809 series M923 M939 series Contents 1 History 2 Engines 3 Driveline 4 Chassis 5 Models 5 1 Cargo trucks 5 2 Dump trucks 5 3 Medium wrecker trucks 5 4 Tractor trucks 5 5 Medium wrecker tractor trucks 5 6 Expansible van trucks 5 7 Bridge transporting trucks 5 8 Logging bolster trucks 5 9 Chassis cabs 6 Model numbers 7 Gallery 8 Notes 9 References 10 External linksHistory editA 20 June 1945 report by the Army Ground Forces Equipment Review Board recommended that all 4 ton to 6 ton tactical trucks should be replaced by a single standard 5 ton 4 536 kg 6x6 truck series In 1949 specifications were set and truck manufactures began working on prototypes Chrysler GMC and Mack s designs were advanced International Harvester s was a conservative conventional similar in size and layout to the earlier 6 ton G512 series 1 2 3 The International Harvester design was chosen and rushed into production in January 1951 it would be standardized as the M39 series Kaiser renamed Kaiser Jeep in 1963 also became a major manufacturer with Diamond T and Mack building smaller numbers In 1963 Kaiser Jeep began building the final order production was completed in 1965 2 4 5 In the 1960s more trucks were required and the Army wanted to replace the multifuel engines with a standard diesel AM General successor of Kaiser Jeep developed an updated and redesigned version of the M39 series Standardized as the M809 series the primary difference was the engine The hood frame and fenders were lengthened to make room for the larger engine and it had a redesigned grille All had an air cleaner on the left front fender a quick visual way to tell them from the earlier M39 series Jeep AM General built all M809s between 1969 and 1982 6 7 The M939 series was a Product Improvement Package of the M809 with updated engine transmission and brakes A new larger cab and tilt forward hood were a major visual change from earlier trucks Early M939s were rebuilds of M809 vehicles suffix A2 are new production by Bowen McLaughlin York BMY with later model Cummins engine 8 9 10 Engines editThe 5 ton family had five different engines in its life one gasoline one multifuel and three different diesels 11 12 The M39 series had three different engines all with different operating characteristics The 1951 design was originally powered by a Continental R6602 a 224 horsepower 167 kW 602 cubic inches 9 9 L inline 6 cylinder gasoline engine These models had no external air filter and had the exhaust outlet under the right side of the truck s body The engine was a successful design but by 1960 its 4 miles per US gallon 1 7 km L and the use of gasoline as a fuel in heavy trucks were becoming a problem 2 13 14 In 1962 1963 Diamond T and Mack began retrofitting M52 semi tractors and M54 cargo trucks to the A1 standard They had a Mack ENDT 673 a 210 horsepower 160 kW 672 cubic inches 11 0 L turbocharged inline 6 cylinder diesel engine These were the only diesel M39 series models 2 The A2 had the army standard design LDS 465 1 multifuel engine built by Continental It was a 175 horsepower 130 kW 478 cu in 7 8 L turbocharged inline 6 cylinder multifuel engine Using M A N technology it was a diesel type that could also use other fuel oils or a gasoline oil mix in an emergency Also used by the M35 2 1 2 ton series this engine was successful in the smaller trucks but was underpowered compared to all other 5 ton models 2 The M809 series used a Cummins NHC250 engine a 855 cubic inches 14 0 L naturally aspirated inline 6 cylinder diesel engine developing 240 horsepower 180 kW at 2100rpm and 685 pound force feet 929 N m of torque at 1500rpm All models of the M809 series used this engine throughout their service life The N series was a very successful commercial design with a conservative rating the engine was more powerful and less stressed than the multifuel engine 7 15 16 The M939 and M939A1 models were rebuilds of the M809 series and used their NHC 250 engine Although the design is dated it is still powerful and reliable in service and was not significantly up graded The M939A2 new production models use a modern Cummins 6CTA8 3 240 horsepower 180 kW 504 cubic inches 8 3 L turbocharged and aftercooled inline 6 cylinder diesel engine This is also a successful commercial design 9 17 18 Driveline editThe M39 and M809 series had a Spicer 5 speed manual synchromesh transmission The M939 used an Allison automatic for better engine speed control and driving ease 19 20 21 22 A two speed transfer case also engaged the front axle M39s and M809s used one which engaged the front axle automatically if the rear wheels turned faster than the front as when the rear wheels spun The M939s had an improved type which always engaged the front axle in the low range in the high range the driver could engage and disengage it with an air control 23 24 Chassis edit nbsp Overhead drawing of M939 series A ladder frame with three live beam axles the front on leaf springs the rear tandem on leaf springs with locating arms Brakes on the M39 and M809 were air over hydraulic with drum brakes on all wheels M939s were full air Many trucks were available with a front mounted 20 000 lb 9 100 kg capacity winch 25 26 27 There were three wheelbases Measurements are from the centerline of the front axle to the centerline of rear tandem The short used for tractors and dumps was 167 inches 4 24 m the long used for cargo wreckers and bolsters was 179 inches 4 55 m and the extra long used for long cargo tractor wreckers and expansible vans was 215 inches 5 46 m 28 29 30 Most models had 11 00x20 size tires with dual rear tires bridge trucks and some chassis cabs had 14 00x20 with dual rear tires Early M939s used 11 00x20s with dual tires but M939A1s had 14 00x20s with single rear tires and M939A2s introduced a central tire inflation system 28 31 32 33 Models editCargo trucks edit nbsp M925A2 dropside cargo truck w winch Cargo trucks had a 14 ft 4 3 m long low sided box with a bottom hinged tailgate bodies with drop sides were also standardized Both had removable side racks with fold down troop seats and bows for a tarpaulin Long cargo trucks with an extra long wheelbase had a 20 ft 6 1 m long box with side racks and bows for a tarpaulin There were no drop side versions and none had troop seats 34 35 36 Dump trucks edit nbsp M930A2 Dump Truck w winch Dump trucks were used to haul sand gravel dirt rubble scrap and other bulk materials They had a 5 cubic yards 3 8 m3 dump body with cab protector and a tailgate that could hinge at either the top or bottom They could be equipped with overhead bows a tarpaulin and troop seats but the relatively small size of the body limited their passenger or cargo load 34 35 36 Medium wrecker trucks edit nbsp M816 Medium Wrecker Truck Medium wrecker trucks were used to recover disabled or stuck trucks and lift large components A rotating telescoping and elevating hydraulic boom could lift a maximum of 20 000 lb 9 100 kg Although the truck was not meant to carry a load the boom could support 7 000 lb 3 200 kg when towing 34 35 36 Tractor trucks edit nbsp M818 Tractor Truck Tractor trucks were used to tow semi trailers up to 37 500 lb 17 000 kg with 15 000 lb 6 800 kg on their fifth wheel On improved roads they could tow up to 55 000 lb 25 000 kg with 25 000 lb 11 000 kg on their fifth wheel 37 38 39 Tractor trucks normally tow a 12 ton 24 000 lb 11 000 kg load rated 4 wheel two axles trailer There are stake platform van tank and low bed models There is also a 15 ton 30 000 lb 14 000 kg low bed trailer the heaviest possible off road A 25 ton 50 000 lb 23 000 kg low bed trailer can be towed on prepared surfaces 40 41 Unlike commercial trucks the fifth wheel can also pivot side to side making a more flexible connection to the trailer Even so off road performance is limited to relatively flat and solid ground 37 38 39 Medium wrecker tractor trucks edit nbsp M819 Wrecker Tractor Truck Medium wrecker tractor trucks with an extra long wheelbase were a wrecker with a fifth wheel mounted behind the boom Meant for aircraft recovery the truck could perform wrecker duties and load and tow semi trailers 34 35 Expansible van trucks edit nbsp M291 Expansible Van Truck Expansible van trucks had a 17 ft 5 2 m long van body with a slide out section on each side When the sections are extended the working floor was over 12 ft 3 7 m wide Some had hydraulic lift gates 42 43 44 Bridge transporting trucks edit nbsp M328 Bridge Transporting Truck Bridge transporting trucks had a stake body 20 ft 6 1 m long for carrying bridging equipment and components In the M939 series there were no standardized bridge models instead specialized bodies were mounted on chassis cabs 34 35 Logging bolster trucks edit nbsp M748 Logging Bolster Truck Logging bolster trucks with a bolster trailer were used to carry long loads like logs poles and bridge sections When unloaded the trailer could be loaded onto the truck There were no bolster trucks in the M939 series 45 35 Chassis cabs edit Chassis cabs were produced in different wheelbases for specialty bodies The largest the M39 series M139C D was an Honest John rocket launcher 12 14 46 47 48 Model numbers editModel wheelbase M39 28 M809 49 M939 50 Cargo 14 ft bed long M54 M813 M923 M926 Cargo 20 ft bed extra long M55 M814 M927 M928 Dump short M51 M817 M929 M930 Tractor short M52 M818 M931 M932 Wrecker long M62 M543 M816 M936 Wrecker Tractor extra long M246 M819 Expansible Van extra long M291 M820 M934 M935 Bridge extra long M328 M821 Logging Bolster long M748 M815 Chassis short short M61 M810 Chassis long long M40 M809 M944 M945 Chassis XL extra long M63 M811 M942 M943 Chassis XL HD extra long M139 M812 M927 M928Gallery edit nbsp M51 Dump truck nbsp M52 Tractor nbsp M816 Wrecker nbsp M820 Expansible Van nbsp M923 Cargo truck nbsp M927 w drone launcherNotes edit Crismon 2001 pp 355 356 a b c d e Doyle 2003 pp 178 188 Vanderveen 1998 p 109 Crismon 2001 pp 356 Vanderveen 1998 pp 110 113 Crismon 2001 pp 360 361 a b Doyle 2003 pp 192 200 Crismon 2001 p 361 a b Doyle 2003 pp 200 204 TM 9 2320 272 10 2004 p 1 19 Crismon 2001 pp 356 361 a b Doyle 2003 pp 178 188 192 204 TM 9 2320 211 10 1989 pp 1 5 1 6 a b TM 9 500 1962 pp 21 31 to 21 40 TM 9 2320 260 20 1978 p 1 34 TM 9 2320 260 34 1 1994 pp 3 1 to 3 259 TM 9 2320 272 10 2004 p 122 TM 9 2320 272 24 1 1992 pp 5 157 to 5 279 TM 9 2320 211 10 1989 pp 2 39 2 41 TM 9 2320 211 35 1978 pp 194 196 TM 9 2320 260 10 2003 p 2 79 TM 9 2320 272 10 2004 pp 1 23 2 104 TM 9 2320 211 35 1978 pp 154 158 196 TM 9 2320 272 23 1 2012 p 0003 8 TM 9 2320 211 10 1989 p 1 2 2 63 to 2 69 TM 9 2320 272 10 2004 p 2 116 to 2 123 TM 9 2320 272 23 1 2012 pp 0002 12 0002 14 a b c TM 9 2320 211 10 1989 pp 1 2 1 3 TM 9 2320 260 10 2003 p 1 25 TM 9 2320 272 10 2004 p 1 10 Doyle 2003 p 188 199 204 TM 9 2320 260 10 2003 p 1 23 TM 9 2320 272 10 2004 pp 1 24 1 25 a b c d e TM 9 2320 211 10 1989 pp iii vi a b c d e f TM 9 2320 260 10 2003 pp 1 11 to 1 21 a b c TM 9 2320 272 10 2004 p 1 1 to 1 4 a b TM 9 2320 211 10 1989 pp iii 1 2 2 79 to 2 82 a b TM 9 2320 260 10 2003 p 1 17 a b TM 9 2320 272 10 2004 pp 2 152 to 2 156 1 TM 9 2330 207 14 1983 TM 55 2330 200 15 1 1976 TM 9 2320 211 10 1989 pp v 1 3 2 91 to 2 104 TM 9 2320 260 10 2003 pp 1 19 1 20 TM 9 2320 272 10 2004 pp 2 21 to 2 27 TM 9 2320 211 10 1989 pp vi 1 3 2 119 to 2 128 TM 9 2320 211 10 1989 p i TM 9 2320 260 10 2003 p i TM 9 2800 1953 p 267 TM 9 2320 260 10 2003 pp 1 4 TM 9 2320 272 10 2004 pp 1 4 References editCrismon Fred W 2001 US Military Wheeled Vehicles 3 ed Victory WW2 ISBN 0 970056 71 0 Doyle David 2003 Standard Catalog of U S Military Vehicles 2 ed Krause ISBN 0 87349 508 X Archived from the original on 2018 01 15 Retrieved 2018 04 26 Vanderveen Bart 1998 A Record of Military Macks in the Services and Beyond After the Battle ISBN 1 870067 09 6 TM 9 500 Data Sheets for Ordnance Type Material PDF US Dept of the Army 1962 Retrieved 11 May 2018 TM 9 2320 211 10 Operators Manual for Truck 5 ton 6x6 M39 series PDF US Dept of the Army 1989 Retrieved 16 June 2019 TM 9 2320 211 20 Organizational Maint for Truck Chassis 5 ton 6x6 M39 M39A1 M40 M748A2 PDF US Dept of the Army 1978 Retrieved 16 June 2019 TM 9 2320 211 35 DS GS and Depot Maint for Truck Chassis 5 Ton 6x6 M39 M39A2 M40 M748A2 PDF US Dept of the Army 1978 Retrieved 16 June 2019 TM 9 2320 260 10 Operator s Manual Truck 5 ton 6x6 M809 series PDF US Dept of the Army 2003 Retrieved 16 June 2019 TM 9 2320 260 20 Technical Manual Unit Maintenance 5 ton 6x6 M809 series Trucks Diesel PDF US Dept of the Army 1995 Retrieved 16 June 2019 TM 9 2320 260 34 1 Direct Support and General Support Maintenance for 5 ton 6x6 M809 Series Trucks Diesel PDF US Dept of the Army 1994 Retrieved 23 June 2019 TM 9 2320 272 10 Operator s Manual for Truck 5 ton 6x6 M939 series PDF US Dept of the Army 2004 Retrieved 16 June 2019 TM 9 2320 272 23 1 Field Maintenance Manual for Truck 5 ton 6x6 M939 M939A1 M939A2 Series Trucks Diesel US Dept of the Army 2012 Retrieved 2 June 2020 TM 9 2320 272 24 1 vol 1 of 4 PDF TM 9 2320 272 24 2 vol 2 of 4 PDF TM 9 2320 272 24 3 vol 3 of 4 PDF and TM 9 2320 272 24 4 vol 4 of 4 PDF Unit Direct Support and General Support Maintenance Manual for Truck 5 ton 6x6 M939 M939A1 M939A2 Series Trucks Diesel US Dept of the Army 1998 TM 9 2330 207 14 Operator Organizational Direct Support and General Support Maintenance Manual Semitrailer Stake 12 ton 4 wheel M127 and others PDF US Dept of the Army 1983 Retrieved 4 August 2019 TM 9 2800 Military Vehicles US Depts of the Army 1953 pp 266 269 Retrieved 11 May 2018 TM 55 2330 200 15 1 Transportability Guidance Semitrailers 12 ton 4 Wheel various models PDF US Dept of the Army 1976 Retrieved 1 August 2019 TM 55 2330 211 15 1 Transportability Guidance Truck 5 ton 6x6 M39 Series Chassis PDF US Dept of the Army 1974 Retrieved 1 August 2019 TM 55 2320 260 14 1 Transport Guidance Technical Manual Truck 5 ton 6x6 M809 Series PDF US Dept of the Army 1993 Retrieved 2 August 2019 TM 55 2320 272 14 1 Transport Guidance Technical Manual Truck 5 ton 6x6 M939 Series M939A1 Series and M939A2 Series PDF US Dept of the Army 1993 Retrieved 2 August 2019 External links editM39 series at Olive Drab com M54 series Technical Manuals at Jatonka M809 series at Olive Drab M809 series at Military Today M809 series Technical Manuals at Jatonka M809 series Technical Manuals at NSN Lookup M939 series at Olive Drab M939 series Technical Manuals at Jatonka M939 series Technical Manuals at NSN Lookup Retrieved from https en wikipedia org w index php title 5 ton 6 6 truck amp oldid 1220729177, wikipedia, wiki, book, books, library,

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