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INTRODUCTION
Three Engine Families — Nine Peak Power
Options
There are six different power ratings:
앫 242 kW (325 hp)
앫 257 kW (345 hp)
앫 265 kW (355 hp)
앫 272 kW (365 hp)
앫 295 kW (395 hp)
앫 302 kW (405 hp)
Maximum torque ratings fall in the
1700–2115 N•m (1200–1560 lb-ft) range.
The MP7 comes in three families: Econodyne™,
MaxiCruise™ and Maxidyne™. Each family has
three peak power options. The number after MP7
is the peak power achieved at 1500 rpm. MACK
places heavy emphasis on the peak power value.
Operators should cruise at approximately
1500 rpm when practical.
A wide range of the current transmission
offerings, especially Allison, can be teamed with
the MP7. No new transmissions are required, but
the MP7 will readily adapt to the Allison GEN 4
Series transmissions.
Diagnostic help can be found in the Premium
Tech Tool (PTT). To obtain PTT, contact your local
MACK dealer.
The engine design includes a one-piece cylinder
head, a single overhead camshaft, unit injectors
and no pushrods. PowerLeash™ engine braking
is standard. Monosteel™ steel pistons are made
in one piece.
Use of ether or similar types of starting aids in
MACK US07 emission compliant engines is
strictly prohibited. This applies to engines
with or without the electric pre-heater option.
An explosion could occur. Failure to heed this
danger may result in severe personal injury or
death.
There is a cylinder block (coolant) heater in the
cooling duct cover. Two optional fan drives are
available: On/Off and electronically actuated. The
electronically actuated viscous fan drive is
precisely controlled by the Engine Management
System (EMS) module, commonly referred to as
the Engine Electronic Control Unit (EECU).
Timing gears mount on the rear of the MP7
improving the flow of cooling air around the front.
Special service instructions apply to the camshaft
position sensor. The mounting plate, idler and
camshaft gears are marked to facilitate proper
installation.
Another feature of the MP7 is the rear engine
power take-off (REPTO-ready) that is gear driven
through the timing gear train. An optional PTO
shaft with drive gear, bearing and housing can be
added at the factory. A front engine power
take-off is available for simple attachment.
The engine has one-piece forged steel
Monosteel™ pistons and wet cylinder liners.
Piston rings are coated using a process called
Physical Vapor Deposition (PVD) to provide a
thin, well adhered material layer for better
cylinder cooling and longer ring and liner life.
A stiffener plate fastens to the bottom of the
cylinder block to ensure block strength and
rigidity. The engine can be used with axle forward
or axle back vehicles by virtue of optional oil
pans. The engine fan is mounted high or low
depending on vehicle configuration. A heater is
available to warm the oil before starting the
engine.
Econodyne (Highway Economy)
MaxiCruise (On/Off Road
Performance) Maxidyne (Off Road Performance)
MP7-325E
MP7-355E
MP7-405E
MP7-345C
MP7-365C
MP7-395C
MP7-325M
MP7-365M
MP7-405M
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