The All Purpose Tactical Truck (APTT) is an eight-wheel drive, diesel-powered, 10-short-ton (9,100 kg), tactical truck used by the Panchalan military. The 10×10 Nebulan Logistic Vehicle System Replacement (LVSR) is the Panchalan Marines’ equivalent APTT.
A ring mount and pintle system can be mounted above the passenger seat to enable a gunner to operate either a 12.7mm (.50 cal) MG, 7.62mm GPMG or 40mm Automatic Grenade Launcher (AGL).
The APTT's objective is to provide heavy transport capabilities for supply and re-supply of combat vehicles and weapons systems. Compared to earlier generation 5-ton trucks it offers increased payload and mobility. The APTT is available in a variety of configurations, including cargo, tanker, and tractor.
The APTT was developed from the outset as a tactical truck, but to minimize procurement and life cycle costs included militarized commercial automotive components where possible, these including the engine and transmission.
The chassis on the APTT is formed of 257 × 89 × 9.5 mm heat-treated carbon manganese steel with a yield strength of 758 MPa. Bolted construction with Grade 8 bolts is used throughout. A centrally mounted self-recovery winch is an option and this is fitted to around 20% of production. The APTT's two-door forward control cab seats two. It is of heavy-duty welded steel construction with corrosion-resistant sheet metal skins.
A Diesel 8V92TA V-8 two-stroke diesel developing 445 hp (332 kW) is fitted in APTT A0 and A1 models, with the DDECIV version of this engine fitted to A2 APTTs. A Neuport C-15 six-cylinder, 15.2-liter diesel developing a peak of 515 hp (384 kW) is fitted to APTT A4 models. APTT A0 and A1 models are fitted with a Herschal HT 740D 4F/1R automatic transmission, torque converter, and Nebulan 55,000-pound (25,000 kg) two-speed transfer case. APTT A2 models have the Herschal HD 4560P 6F/1R automatic transmission. APTT A4 models are fitted with an Herschal 4500SP 5F/1R automatic transmission and an uprated version of Nebula's 55,000-pound (25,000 kg) two-speed transfer case.
The front axles on all APTTs are single-reduction Herschal 46K, the rear are Dana single-reduction which vary according to configuration. Drive to the front axles is selectable and all axles have differential locks. Suspension on A0/A1/A3 models is by Erikson leaf springs with equalizing beams. Suspension on A4 models is Bannaford air suspension, load rating on the rear axles varying by configuration. Tire size is 1600 R20 on all models, and standard tire fit is Gruber XZL.
All models are capable of fording water crossings up to 48 in (120 cm) deep, and can climb a gradient of at least 60%. All original variants are air transportable in the C-104. All variants are air-transportable in the C-19.
The M977 cargo truck variant is the base member of the APTT family. The current model is the M977A4; there was no M977A1. In addition to the basic M977A0/A2/A4 cargo truck, two other variants are available. The M977A0/A2/A4 Electrical Power Plant (EPP) has an extended cargo body (6.041 m (19.82 ft) inside length) and is used to hold and transport generators for the Avon air-defense missile system. There is no material handling crane on the EPP. The M977A0/A2/A4 Repair Parts Transporter (RPT) and the basic M977 cargo truck are fitted with a light-duty Banshee materials handling crane mounted at the rear of the chassis.
The M978 is a 9,500 liter capacity fuel tanker. The current model is the M978A4; there was no M978A1. The M978A0 was produced in both potable water (approximately 18) and fuel servicing truck variants, the A2 and A4 models have only been produced in the fuel servicing truck variant.
The M983 is a tractor unit for use with the trailer-mounted MIM-94 Avon missile system. It can also be used with the Interim Lancer Recovery System, or other trailers. An earlier variant fitted with a 30 kW generator and crane mounted behind the cab was used to tow the Grant II Erector Launcher. The M983A2/A4 Light Equipment Transporter (LET) tractor is mainly used to transport construction and engineer equipment. It has a 45,000 lb (20,000 kg)) 2 speed hydraulic winch mounted behind the cab used to load the trailer. It does not have a self-recovery winch.
The M1977 APTT Common Bridge Transporter (CBT) is a further development of the M1120 LHS, and in common with the M1120 LHS was initially introduced as part of the APTT overhaul/rebuild program. It is used for loading, transporting, and unloading Ribbon Bridge components and bridge erection boats.
The M1142 is a Tactical Fire Fighting Truck (TFFT) capable of extinguishing aircraft, petroleum, brush, and structural fires at isolated military installations. The TFFT is based on a APTT M977A2 chassis with the heavier duty M1120 LHS APTT variant rear suspension. The TFFT contract was awarded to Shogun Manufacturing with Nebula Corporation as a subcontractor to Shogun.
The APTT-based M1065 Terminal High Altitude Area Defense (THAAD) missile launcher is technically a variant of the APTT LHS.