| Heavy Expanded Mobility Tactical Truck (HEMTT) | |
|---|---|
 HEMTT M1120A4 in B-kit configuration | |
| Type | 10-ton, 8×8, heavy tactical truck |
| Place of origin | United States |
| Service history | |
| In service | 1982–present[1] |
| Used by | U.S. Army and others (see Operators)[1] |
| Production history | |
| Designer | Oshkosh Corporation |
| Designed | 1981 |
| Manufacturer | Oshkosh Corporation |
| Produced | 1982–present |
| No. built | 35,800 (new build)[2][3] |
| Variants | M977A0/A2/A4 cargo truck M977A0/A2/A4 Electrical Power Plant cargo truck (EPP) M978A0/A3/A4 tanker M983A0/A2/A4 tractor M983A2/A4 Light Equipment Transport tractor (LET) M984A0/A1/A2/A4 wrecker M985A0/A2/A4 cargo truck M985A0/A2/A4 Guided Missile Transporter cargo truck (GMT) M1120A2/A4 Load Handling System (LHS) M1142 Tactical Fire Fighting Truck (TFFT) M1158 water tender M1977A0/A2/A4 Common Bridge Transport (CBT) THAAD Missile Transporter erector launcher HEMTT A3 (ProPulse).[4] |
| Specifications (M977A4[4][5]) | |
| Mass | 42,500 lb (19,300 kg) unladen 69,000 lb (31,000 kg) laden (a-kit) 75,500 lb (34,200 kg) laden (b-kit) 109,000 lb (49,000 kg) (GCWR) |
| Length | 34 ft 1 in; 10.4 m |
| Width | 8 ft 0 in; 2.4 m |
| Height | 9 ft 10 in; 3.0 m (over spare tire) |
| Crew | 2 |
| Armor | U.S. Army Long Term Armor Strategy (LTAS) compliant; A-kit (integral) and B-kit (add-on armor appliqué) |
| Engine | Caterpillar (CAT) C15, 15.2-liter, 6-cylinder inline water-cooled EPA 2004 compliant diesel 515 hp (384 kW) |
| Payload capacity | rated at 10 short tons (9,100 kg) |
| Transmission | Allison 4500SP 5-speed automatic with Oshkosh enhanced 55,000-pound (25,000 kg) 2 speed transfer case |
| Suspension | Holland ADS-240 air (front); Holland AD-246 air (rear) |
| Fuel capacity | 155 US gal (587 L) |
Operational range | 300 mi (483 km) loaded |
| Maximum speed | 62 mph (100 km/h) |
Steering system | power-assisted on front tandem |
The Heavy Expanded Mobility Tactical Truck (HEMTT) is an eight-wheel drive, diesel-powered, 10-short-ton (9,100 kg) tactical truck.[2] The M977 HEMTT first entered service in 1982 with the United States Army as a replacement for the M520 Goer, and since that date has remained in production for the U.S. Army and other nations.[2][6] By Q2 2021, around 35,800 HEMTTs in various configurations had been produced by Oshkosh Defense through new-build contracts and around 14,000 of these had been re-manufactured.[3][2] Current variants have the A4 suffix.
The 10×10 Logistic Vehicle System Replacement (LVSR) is the United States Marines Corps' (USMC) equivalent to the U.S. Army's 8×8 HEMTT and 10×10 Palletized Load System (PLS). The USMC does not use the HEMTT or PLS, and the Army does not use the LVSR, but both services use a common trailer (M1076) with all three truck types.
- ^ a b "HEMTT Fact File for the United States Army". Army.mil. U.S. Army. Archived from the original on 11 June 2008. Retrieved 21 May 2010.
- ^ a b c d "Oshkosh M977 Heavy Expanded Mobility Tactical Truck (HEMTT)". IHS Jane's Shaun C Connors. 1 May 2021. Retrieved 7 May 2021.
- ^ a b "Oshkosh M977 heavy expanded mobility tactical truck (HEMTT) and M989A1 heavy expanded mobility ammunition trailer (HEMAT)". IHS Jane's Shaun C Connors. 18 March 2019. Retrieved 17 May 2019.
- ^ a b "Oshkosh M977 heavy expanded mobility tactical truck (HEMTT) and M989A1 heavy expanded mobility ammunition trailer (HEMAT)". IHS Jane's Shaun C Connors & Christopher F. Foss. 14 June 2015. Retrieved 14 June 2015.
- ^ Cite error: The named reference
HEMTT A4was invoked but never defined (see the help page). - ^ "HEMTT". olive-drab.com. Olive-Drab.com LLC. 22 May 2008. Archived from the original on 22 October 2007. Retrieved 22 April 2007.