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Page Title:
EQUIPMENT DESCRIPTION AND DATA |
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 TM 9-2320-312-24-1
EQUIPMENT DESCRIPTION AND DATA
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
Characteristics.
1.
a.
The M878A2 Yard Tractor moves ("spots") trailers in a terminal yard environment and in roll-on/roll-off (RO/RO)
marine operations. Use of this vehicle on a public road or highway is NOT authorized.
b.
The M878A2 has a Gross Vehicle Weight Rating (GVWR) of 46,662 lb (21,185 kg).
c.
A hydraulically-controlled fifth wheel can be raised or lowered 31 in (79 cm), has a 70,000 lb (31,780 kg) vertical
load capacity, and is compatible with a two-inch kingpin.
d.
A cab-controlled, air-operated latching cylinder unlocks fifth wheel coupler jaws from inside the cab.
2.
Capabilities and Features.
a.
The M878A2 has a wheelbase of 122.00 in (309.88 cm) and an overall length of 198.64 in (504.55 cm).
b.
The maximum speed of the M878A2 is 22.9 mph (36.9 kph). Maximum allowable speed while towing is 15 mph
(24 kph).
c.
The M878A2 is equipped with an instrument panel-mounted speedometer and tachometer that register vehicle for-
ward speed and engine speed.
d.
The M878A2 has the following capabilities and features:
(1)
Caterpillar 7.2L, electronically-controlled, turbocharged, 275 horsepower diesel engine;
(2)
MD3560P Allison transmission with five (5) forward speeds, neutral, and reverse;
(3)
Spicer 1710 propshaft;
(4)
Eaton E-1460I front steering axle;
(5)
Dana D90-14-2S single rear axle with dual wheels;
(6)
front and rear air-activated s-cam brakes; rear axle spring-loaded parking brakes;
(7)
Sheppard power steering gear;
(8)
air conditioning system;
(9)
backup lights and alarm;
(10)
45-degree cab tilt system;
(11)
cab sliding rear door; and
(12)
KBI 40 kJ Ultra Capacitor starting system.
e.
A fire extinguisher and an M16 rifle mount are located behind the driver's seat inside the cab.
f.
An auxiliary arctic heater (TM 9-2320-312-10) is available for installation if tractor is to operate in temperatures
below -25F (-32C).
g.
If installation of an auxiliary radio is desired, wiring is available behind the access panel located inside the cab
above the sun visor.
Change 1
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