Heavy Expanded Mobility Tactical Truck
The Heavy Expanded Mobility Tactical Truck (HEMTT) is an eight-wheel drive, diesel-powered, 10-short-ton (9,100 kg) tactical truck. 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. 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. Current variants have the A4 suffix.
| Heavy Expanded Mobility Tactical Truck (HEMTT) | |
|---|---|
HEMTT M1120A4 in A-kit configuration—without cab armor, the B-kit | |
| Type | 10-ton, 8×8, heavy tactical truck |
| Place of origin | United States |
| Service history | |
| In service | 1982–present |
| Used by | U.S. Army and others (see Operators) |
| Production history | |
| Designer | Oshkosh Corporation |
| Designed | 1981 |
| Manufacturer | Oshkosh Corporation |
| Produced | 1982–present |
| No. built | 35,800 (new build) |
| Variants | -M977A0/A2/A4 cargo truck. -M977A0/A2/A4 Electrical Power Plant cargo truck (EPP) -M978A0/A3/A4 tanker. -M1120A2/A4 Load Handling System (LHS). -M1977A0/A2/A4 Common Bridge Transport (CBT). -THAAD Missile Transporter erector launcher. -M1142 Tactical Fire Fighting Truck (TFFT). -M1158 water tender. -HEMTT A3 (ProPulse). |
| Specifications (M977A4) | |
| 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 | 409 in (10.4 m) |
| Width | 96 in (2.4 m) |
| Height | 118 in (3.0 m) (over spare tire) |
| Crew | 2 |
| Armor | a-kit/b-kit; U.S. Army Long Term Armor Strategy (LTAS) compliant |
| 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 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.